{"transactions":[{"id":2563160,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66490,"kind":"organization","name":"BRF Investments, LLC","position":2,"cik":"0001880803","reported_name":"BRF Investments, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":3,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":4,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":5,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":6,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":7,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":8,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-09-21T21:30:15.000Z","date":"2021-09-17","kind":"sale","acquired":false,"shares":5000,"price":13.7687,"value":68843.5,"ownership":{"direct":false,"nature":"By Bryant R. Riley, as UTMA custodian for Eloise Riley"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001213900-21-049232","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021049232/ownership.xml","form_type":"4"}},{"id":2563159,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":6,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":7,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":8,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-09-21T21:30:15.000Z","date":"2021-09-17","kind":"sale","acquired":false,"shares":5000,"price":13.7687,"value":68843.5,"ownership":{"direct":false,"nature":"By Bryant R. Riley, as UTMA custodian for Abigail Riley"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001213900-21-049232","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021049232/ownership.xml","form_type":"4"}},{"id":2563158,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":6,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":7,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":8,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-09-21T21:30:15.000Z","date":"2021-09-17","kind":"sale","acquired":false,"shares":5000,"price":13.7687,"value":68843.5,"ownership":{"direct":false,"nature":"By Bryant R. Riley, as UTMA custodian for Susan Riley"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001213900-21-049232","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021049232/ownership.xml","form_type":"4"}},{"id":2563157,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-09-21T21:30:15.000Z","date":"2021-09-17","kind":"sale","acquired":false,"shares":5000,"price":13.7687,"value":68843.5,"ownership":{"direct":false,"nature":"By Bryant R. Riley, as UTMA custodian for Charlie Riley"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001213900-21-049232","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021049232/ownership.xml","form_type":"4"}},{"id":2563156,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":6,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":7,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":8,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-09-09T21:30:39.000Z","date":"2021-09-09","kind":"sale","acquired":false,"shares":25371,"price":13.4103,"value":340232.7213,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001213900-21-047271","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021047271/ownership.xml","form_type":"4"}},{"id":2574892,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-09-09T21:30:39.000Z","date":"2021-09-08","kind":"sale","acquired":false,"shares":300,"price":13.6033,"value":4080.99,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":25371,"source":{"system":"sec-edgar","filing":"0001213900-21-047271","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021047271/ownership.xml","form_type":"4"}},{"id":2574891,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-09-09T21:30:39.000Z","date":"2021-09-07","kind":"sale","acquired":false,"shares":38544,"price":13.7787,"value":531086.2128,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":25671,"source":{"system":"sec-edgar","filing":"0001213900-21-047271","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021047271/ownership.xml","form_type":"4"}},{"id":2579597,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-09-03T21:30:53.000Z","date":"2021-09-03","kind":"sale","acquired":false,"shares":30576,"price":13.6493,"value":417340.9968,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":64215,"source":{"system":"sec-edgar","filing":"0001213900-21-046748","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021046748/ownership.xml","form_type":"4"}},{"id":2579596,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":94791,"source":{"system":"sec-edgar","filing":"0001213900-21-046748","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021046748/ownership.xml","form_type":"4"}},{"id":2579595,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":123782,"source":{"system":"sec-edgar","filing":"0001213900-21-046748","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021046748/ownership.xml","form_type":"4"}},{"id":2585296,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-08-31T16:18:09.000Z","date":"2021-08-30","kind":"sale","acquired":false,"shares":970,"price":14.0312,"value":13610.264,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":215509,"source":{"system":"sec-edgar","filing":"0001213900-21-045902","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021045902/ownership.xml","form_type":"4"}},{"id":2585295,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":6,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":7,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":8,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-08-31T16:18:09.000Z","date":"2021-08-27","kind":"sale","acquired":false,"shares":100000,"price":13.9081,"value":1390810.0,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":216479,"source":{"system":"sec-edgar","filing":"0001213900-21-045902","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021045902/ownership.xml","form_type":"4"}},{"id":2586742,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66490,"kind":"organization","name":"BRF Investments, LLC","position":2,"cik":"0001880803","reported_name":"BRF Investments, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":3,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":4,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":5,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":6,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":7,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":8,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-08-30T16:01:31.000Z","date":"2021-08-26","kind":"sale","acquired":false,"shares":50000,"price":13.8467,"value":692335.0,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":316479,"source":{"system":"sec-edgar","filing":"0001213900-21-045593","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021045593/ownership.xml","form_type":"4/A","original_submission_date":"2021-08-27"}},{"id":2586741,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66490,"kind":"organization","name":"BRF Investments, LLC","position":2,"cik":"0001880803","reported_name":"BRF Investments, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":3,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":4,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":5,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":6,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":7,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":8,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-08-30T16:01:31.000Z","date":"2021-08-25","kind":"sale","acquired":false,"shares":23521,"price":13.5546,"value":318817.7466,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":366479,"source":{"system":"sec-edgar","filing":"0001213900-21-045593","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021045593/ownership.xml","form_type":"4/A","original_submission_date":"2021-08-27"}},{"id":2586740,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66490,"kind":"organization","name":"BRF Investments, LLC","position":2,"cik":"0001880803","reported_name":"BRF Investments, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":3,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":4,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":5,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":6,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":7,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":8,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-08-30T16:01:31.000Z","date":"2021-08-25","kind":"sale","acquired":false,"shares":8431,"price":13.5546,"value":114278.8326,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001213900-21-045593","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021045593/ownership.xml","form_type":"4/A","original_submission_date":"2021-08-27"}},{"id":2586739,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":9,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-08-30T16:01:31.000Z","date":"2021-08-24","kind":"sale","acquired":false,"shares":94598,"price":13.5253,"value":1279466.3294,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":8431,"source":{"system":"sec-edgar","filing":"0001213900-21-045593","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021045593/ownership.xml","form_type":"4/A","original_submission_date":"2021-08-27"}},{"id":2588484,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-08-27T07:04:18.000Z","date":"2021-08-26","kind":"sale","acquired":false,"shares":50000,"price":13.8467,"value":692335.0,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":316479,"source":{"system":"sec-edgar","filing":"0001213900-21-045182","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021045182/ownership.xml","form_type":"4"}},{"id":2588483,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-08-27T07:04:18.000Z","date":"2021-08-25","kind":"sale","acquired":false,"shares":23521,"price":13.5546,"value":318817.7466,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":366479,"source":{"system":"sec-edgar","filing":"0001213900-21-045182","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021045182/ownership.xml","form_type":"4"}},{"id":2588482,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-08-27T07:04:18.000Z","date":"2021-08-25","kind":"sale","acquired":false,"shares":8431,"price":13.5546,"value":114278.8326,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001213900-21-045182","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021045182/ownership.xml","form_type":"4"}},{"id":2588481,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2021-08-27T07:04:18.000Z","date":"2021-08-24","kind":"sale","acquired":false,"shares":94598,"price":13.5253,"value":1279466.3294,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"This Form 4 is being filed jointly by B. Riley Financial, Inc. (\"BRF\"), BRF Investments, LLC (\"BRFI\"), B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\"), B. Riley Principal Investments, LLC (\"BRPI\"), BRC Partners Opportunity Fund, LP (\"BRPLP\"), BRC Partners Opportunity Fund GP, LLC (\"BRPGP\"), B. Riley Capital Management, LLC (\"BRCM\"), B. Riley Securities, Inc. (\"BRS\"), and Bryant R. Riley. BRF is the parent company of BRFI and BRS. As a result, BRF may be deemed to indirectly beneficially own the shares held by BRFI and BRS, respectively. BRPI is the sole member of the Sponsor. BRF is the parent company of BRPI. As a result, BRF and BRPI may be deemed to indirectly beneficially own the shares held by the Sponsor. BRPGP is the general partner of BRPLP. BRCM is the sole member of BRPGP. BRF is the parent company of BRCM. As a result, BRF, BRPGP, and BRCM, may be deemed to indirectly beneficially own the shares held by BRPLP."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRFI, BRS, BRPLP and the Sponsor. Each of BRF, BRFI, the Sponsor, BRPI, BRPLP, BRPGP, BRCM, BRS, and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":8431,"source":{"system":"sec-edgar","filing":"0001213900-21-045182","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390021045182/ownership.xml","form_type":"4"}},{"id":2975632,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Warrants (right to buy)","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-17","kind":"other","acquired":true,"shares":25000,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"BRPLP owned 50,000 of the Issuer's public units, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-237812) (the \"Registration Statement\"), which automatically separated into their component securities upon the closing of the Business Combination."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"BRPLP owned 50,000 of the Issuer's public units, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-237812) (the \"Registration Statement\"), which automatically separated into their component securities upon the closing of the Business Combination."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F10","text":"The warrants will become exercisable on the later of (a) 30 days after the completion of the Business Combination or (b) 12 months from the closing of the Public Offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F11","text":"The Warrants will expire five years after the completion of a Business Combination or earlier upon redemption or liquidation."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":25000,"derivative":{"exercise_price":11.5,"underlying":"Class A Common Stock","underlying_shares":25000},"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975631,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Warrants (right to buy)","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-17","kind":"other","acquired":true,"shares":325000,"ownership":{"direct":false,"nature":"By B. Riley Principal Sponsor Co. II, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The Sponsor owned 650,000 of the Issuer's Private Placement Units, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-237812) (the \"Registration Statement\"), which automatically separated into their component securities upon the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\")."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The Sponsor owned 650,000 of the Issuer's Private Placement Units, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-237812) (the \"Registration Statement\"), which automatically separated into their component securities upon the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F10","text":"The warrants will become exercisable on the later of (a) 30 days after the completion of the Business Combination or (b) 12 months from the closing of the Public Offering."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F11","text":"The Warrants will expire five years after the completion of a Business Combination or earlier upon redemption or liquidation."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":325000,"derivative":{"exercise_price":11.5,"underlying":"Class A Common Stock","underlying_shares":325000},"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975630,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class B Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"other","acquired":false,"shares":3221250,"ownership":{"direct":false,"nature":"By B. Riley Principal Sponsor Co. II, LLC"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"In connection with the Business Combination, among other things, each share of BMRG's Class B common stock (as described under the heading \"Description of Securities\" in the Registration Statement) converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc. (or \"EOSE\")."},{"field":"kind","element":"transactionCoding","label":"F5","text":"In connection with the Business Combination, among other things, each share of BMRG's Class B common stock (as described under the heading \"Description of Securities\" in the Registration Statement) converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc. (or \"EOSE\")."},{"field":"shares","element":"transactionShares","label":"F4","text":"1,288,500 of such shares are subject to the earnout restrictions set forth in the Sponsor Earnout Letter that was entered into on November 16, 2020, by and between BMRG and the Sponsor, in connection with the Business Combination."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"In connection with the Business Combination, among other things, each share of BMRG's Class B common stock (as described under the heading \"Description of Securities\" in the Registration Statement) converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc. (or \"EOSE\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"In connection with the Business Combination, among other things, each share of BMRG's Class B common stock (as described under the heading \"Description of Securities\" in the Registration Statement) converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc. (or \"EOSE\")."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"In connection with the Business Combination, among other things, each share of BMRG's Class B common stock (as described under the heading \"Description of Securities\" in the Registration Statement) converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc. (or \"EOSE\")."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F4","text":"1,288,500 of such shares are subject to the earnout restrictions set forth in the Sponsor Earnout Letter that was entered into on November 16, 2020, by and between BMRG and the Sponsor, in connection with the Business Combination."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":3221250},"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975629,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class B Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"other","acquired":false,"shares":1073750,"ownership":{"direct":false,"nature":"By B. Riley Principal Sponsor Co. II, LLC"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"In connection with the Business Combination, among other things, each share of BMRG's Class B common stock (as described under the heading \"Description of Securities\" in the Registration Statement) converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc. (or \"EOSE\")."},{"field":"kind","element":"transactionCoding","label":"F9","text":"Represents a pro-rata distribution to the members of the Sponsor for no consideration."},{"field":"price","element":"transactionPricePerShare","label":"F9","text":"Represents a pro-rata distribution to the members of the Sponsor for no consideration."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"In connection with the Business Combination, among other things, each share of BMRG's Class B common stock (as described under the heading \"Description of Securities\" in the Registration Statement) converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc. (or \"EOSE\")."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"In connection with the Business Combination, among other things, each share of BMRG's Class B common stock (as described under the heading \"Description of Securities\" in the Registration Statement) converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc. (or \"EOSE\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":3221250,"derivative":{"underlying":"Class A Common Stock","underlying_shares":1073750},"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975628,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"purchase","acquired":true,"shares":5000,"price":10,"value":50000.0,"ownership":{"direct":false,"nature":"By Bryant R. Riley, as UTMA custodian for Eloise Riley"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":5000,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975627,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"purchase","acquired":true,"shares":5000,"price":10,"value":50000.0,"ownership":{"direct":false,"nature":"By Bryant R. Riley, as UTMA custodian for Abigail Riley"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":5000,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975626,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"purchase","acquired":true,"shares":5000,"price":10,"value":50000.0,"ownership":{"direct":false,"nature":"By Bryant R. Riley, as UTMA custodian for Susan Riley"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":5000,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975625,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"purchase","acquired":true,"shares":5000,"price":10,"value":50000.0,"ownership":{"direct":false,"nature":"By Bryant R. Riley, as UTMA custodian for Charlie Riley"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":5000,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975624,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. 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RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"purchase","acquired":true,"shares":20000,"price":10,"value":200000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F8","text":"Represents shares held directly by Bryant R. Riley."}],"balance_after":20000,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975623,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"purchase","acquired":true,"shares":2167000,"price":10,"value":21670000.0,"ownership":{"direct":false,"nature":"By B. Riley Principal Investments, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":2167000,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975622,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"purchase","acquired":true,"shares":140000,"price":10,"value":1400000.0,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"As previously disclosed, on September 7, 2020, the Company entered into certain subscription agreements (the \"Subscription Agreements\") with investors (the \"PIPE investors\") pursuant to which such investors agreed to purchase, immediately prior to the closing of the Business Combination, an aggregate of $40,000,000 of the Company's shares of common stock at a price of $10.00 per share, or an aggregate of 4,000,000 shares of common stock. BRPLP, BRPI and Bryant R. Riley are among the PIPE investors."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"BRPLP owned 50,000 of the Issuer's public units, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-237812) (the \"Registration Statement\"), which automatically separated into their component securities upon the closing of the Business Combination."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":390000,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975621,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"other","acquired":true,"shares":3221250,"ownership":{"direct":false,"nature":"By B. Riley Principal Sponsor Co. II, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"In connection with the Business Combination, among other things, each share of BMRG's Class B common stock (as described under the heading \"Description of Securities\" in the Registration Statement) converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc. (or \"EOSE\")."},{"field":"shares","element":"transactionShares","label":"F4","text":"1,288,500 of such shares are subject to the earnout restrictions set forth in the Sponsor Earnout Letter that was entered into on November 16, 2020, by and between BMRG and the Sponsor, in connection with the Business Combination."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"In connection with the Business Combination, among other things, each share of BMRG's Class B common stock (as described under the heading \"Description of Securities\" in the Registration Statement) converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc. (or \"EOSE\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Sponsor owned 650,000 of the Issuer's Private Placement Units, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-237812) (the \"Registration Statement\"), which automatically separated into their component securities upon the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"1,288,500 of such shares are subject to the earnout restrictions set forth in the Sponsor Earnout Letter that was entered into on November 16, 2020, by and between BMRG and the Sponsor, in connection with the Business Combination."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":3871250,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975620,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"purchase","acquired":true,"shares":4236,"price":10.68,"value":45240.48,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":103029,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975619,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. 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Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":98793,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2975618,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-18T18:12:09.000Z","date":"2020-11-16","kind":"purchase","acquired":true,"shares":5000,"price":10.72,"value":53600.0,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":93793,"source":{"system":"sec-edgar","filing":"0001213900-20-038065","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020038065/ownership.xml","form_type":"4/A","original_submission_date":"2020-11-17"}},{"id":2977894,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. 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Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":88793,"source":{"system":"sec-edgar","filing":"0001213900-20-037835","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020037835/ownership.xml","form_type":"4"}},{"id":2977888,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. 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II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\"), among other things, each share of BMRG's Class B common stock converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc."},{"field":"kind","element":"transactionCoding","label":"F1","text":"In connection with the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\"), among other things, each share of BMRG's Class B common stock converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc."},{"field":"shares","element":"transactionShares","label":"F2","text":"1,288,500 of such shares are subject to the earnout restrictions set forth in the Sponsor Earnout Letter that was entered into on November 16, 2020, by and between BMRG and the Sponsor, in connection with the Business Combination."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\"), among other things, each share of BMRG's Class B common stock converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"In connection with the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\"), among other things, each share of BMRG's Class B common stock converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"In connection with the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. 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Riley Principal Investments, LLC (\"BRPI\") is the managing member of the Sponsor and is a wholly-owned subsidiary of B. Riley Financial, Inc. (\"BRF\"), a Delaware corporation. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":3221250},"source":{"system":"sec-edgar","filing":"0001213900-20-037812","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020037812/ownership.xml","form_type":"4"}},{"id":2977887,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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II, LLC"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In connection with the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\"), among other things, each share of BMRG's Class B common stock converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc."},{"field":"kind","element":"transactionCoding","label":"F3","text":"Represents a pro-rata distribution to the members of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") for no consideration."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\"), among other things, each share of BMRG's Class B common stock converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"In connection with the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\"), among other things, each share of BMRG's Class B common stock converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"In connection with the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\"), among other things, each share of BMRG's Class B common stock converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents a pro-rata distribution to the members of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") for no consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"B. Riley Principal Investments, LLC (\"BRPI\") is the managing member of the Sponsor and is a wholly-owned subsidiary of B. Riley Financial, Inc. (\"BRF\"), a Delaware corporation. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."}],"balance_after":3221250,"derivative":{"underlying":"Class A Common Stock","underlying_shares":1073750},"source":{"system":"sec-edgar","filing":"0001213900-20-037812","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020037812/ownership.xml","form_type":"4"}},{"id":2977886,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2020-11-17T18:27:50.000Z","date":"2020-11-16","kind":"other","acquired":true,"shares":3221250,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By B. Riley Principal Sponsor Co. II, LLC"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"In connection with the closing of the business combination between Eos Energy Enterprises, Inc. (formerly known as B. Riley Principal Merger Corp. II or \"BMRG\") and Eos Energy Storage LLC (the \"Business Combination\"), among other things, each share of BMRG's Class B common stock converted into shares of BMRG's Class A common stock on a one-for-one basis and subsequently, each share of BMRG's Class A common stock was reclassified as a share of common stock of Eos Energy Enterprises, Inc."},{"field":"shares","element":"transactionShares","label":"F2","text":"1,288,500 of such shares are subject to the earnout restrictions set forth in the Sponsor Earnout Letter that was entered into on November 16, 2020, by and between BMRG and the Sponsor, in connection with the Business Combination."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"1,288,500 of such shares are subject to the earnout restrictions set forth in the Sponsor Earnout Letter that was entered into on November 16, 2020, by and between BMRG and the Sponsor, in connection with the Business Combination."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Represents a pro-rata distribution to the members of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") for no consideration."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"B. Riley Principal Investments, LLC (\"BRPI\") is the managing member of the Sponsor and is a wholly-owned subsidiary of B. Riley Financial, Inc. (\"BRF\"), a Delaware corporation. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."}],"balance_after":3221250,"source":{"system":"sec-edgar","filing":"0001213900-20-037812","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020037812/ownership.xml","form_type":"4"}},{"id":2984134,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-12T17:24:27.000Z","date":"2020-11-12","kind":"purchase","acquired":true,"shares":86593,"price":10.3306,"value":894557.6458,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":86593,"source":{"system":"sec-edgar","filing":"0001213900-20-036630","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020036630/ownership.xml","form_type":"4"}},{"id":2984133,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-12T17:24:27.000Z","date":"2020-11-11","kind":"purchase","acquired":true,"shares":419971,"price":10.1799,"value":4275262.7829,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were bought in multiple transactions at prices ranging from $9.99 to $10.43, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the above range."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001213900-20-036630","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020036630/ownership.xml","form_type":"4"}},{"id":2984132,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-12T17:24:27.000Z","date":"2020-11-10","kind":"sale","acquired":false,"shares":2050000,"price":10.12,"value":20746000.0,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001213900-20-036630","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020036630/ownership.xml","form_type":"4"}},{"id":2984131,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-12T17:24:27.000Z","date":"2020-11-10","kind":"purchase","acquired":true,"shares":668045,"price":10.1197,"value":6760414.9865,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":1630029,"source":{"system":"sec-edgar","filing":"0001213900-20-036630","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020036630/ownership.xml","form_type":"4"}},{"id":2984130,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. II, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":92652,"kind":"organization","name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","position":3,"cik":"0001776226","reported_name":"B. RILEY PRINCIPAL INVESTMENTS, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":105927,"kind":"organization","name":"B. RILEY CAPITAL MANAGEMENT, LLC","position":4,"cik":"0001658704","reported_name":"B. RILEY CAPITAL MANAGEMENT, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134383,"kind":"organization","name":"BRC Partners Management GP, LLC","position":5,"cik":"0001749420","reported_name":"BRC Partners Management GP, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":134384,"kind":"organization","name":"BRC Partners Opportunity Fund, LP","position":6,"cik":"0001642765","reported_name":"BRC Partners Opportunity Fund, LP","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":66491,"kind":"organization","name":"B. Riley Securities, Inc.","position":7,"cik":"0001505748","reported_name":"B. Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-12T06:30:21.000Z","date":"2020-11-09","kind":"purchase","acquired":true,"shares":200000,"price":10.126,"value":2025200.0,"ownership":{"direct":false,"nature":"By BRC Partners Opportunity Fund, LP"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The reported shares of Class A Common Stock include shares within 50,000 of the Issuer's public units, as described under the heading \"Description of Securities\" in the Issuer's Registration Statement on Form S-1 (File No. 333-237812) (the \"Registration Statement\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":250000,"source":{"system":"sec-edgar","filing":"0001213900-20-036335","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020036335/ownership.xml","form_type":"4"}},{"id":2984129,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-12T06:30:21.000Z","date":"2020-11-09","kind":"purchase","acquired":true,"shares":881687,"price":10.1293,"value":8930872.1291,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":961984,"source":{"system":"sec-edgar","filing":"0001213900-20-036335","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020036335/ownership.xml","form_type":"4"}},{"id":2984128,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. 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As previously announced, the Issuer has scheduled a special meeting on November 12, 2020 to vote on the proposals (the \"vote\") relating to the Issuer's proposed business combination. Holders of shares of the Issuer's Common Stock were entitled to request that the Issuer redeem all or a portion of their public shares for cash in connection with the vote until November 10, 2020."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On November 9, 2020, BRS redeemed 1,527,633 shares of Common Stock with B. Riley Principal Merger Corp. II, a Delaware corporation (the \"Issuer\"), for cash at a price of $10.10 per share, as stated on the received redemption notice. As previously announced, the Issuer has scheduled a special meeting on November 12, 2020 to vote on the proposals (the \"vote\") relating to the Issuer's proposed business combination. Holders of shares of the Issuer's Common Stock were entitled to request that the Issuer redeem all or a portion of their public shares for cash in connection with the vote until November 10, 2020."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":80297,"source":{"system":"sec-edgar","filing":"0001213900-20-036335","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020036335/ownership.xml","form_type":"4"}},{"id":2989906,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. 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Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":1607930,"source":{"system":"sec-edgar","filing":"0001213900-20-035663","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020035663/ownership.xml","form_type":"4"}},{"id":2989905,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-06T19:05:42.000Z","date":"2020-11-06","kind":"purchase","acquired":true,"shares":754002,"price":10.1,"value":7615420.2,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":2347930,"source":{"system":"sec-edgar","filing":"0001213900-20-035663","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020035663/ownership.xml","form_type":"4"}},{"id":2989904,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-06T19:05:42.000Z","date":"2020-11-06","kind":"purchase","acquired":true,"shares":48210,"price":10.25,"value":494152.5,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. Each of BRF, BRPGP, BRCM, BRPLP, BRS, BRPI, the Sponsor and Bryant R. Riley disclaims beneficial ownership of the outstanding shares of Common Stock reported herein, except to the extent of its/his respective pecuniary interest therein."}],"balance_after":1593928,"source":{"system":"sec-edgar","filing":"0001213900-20-035663","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020035663/ownership.xml","form_type":"4"}},{"id":2989903,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. 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Riley Securities, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":37663,"kind":"person","name":"RILEY BRYANT R","position":8,"cik":"0001207269","reported_name":"RILEY BRYANT R","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Class A Common Stock","published_at":"2020-11-06T19:05:42.000Z","date":"2020-11-06","kind":"purchase","acquired":true,"shares":10000,"price":10.1,"value":101000.0,"ownership":{"direct":false,"nature":"By B. Riley Securities, Inc."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is a subsidiary of B. Riley Capital Management, LLC, a New York limited liability company and registered investment advisor (\"BRCM\"), and is the general partner of BRC Partners Opportunity Fund, LP, a Delaware limited partnership (\"BRPLP\"). B. Riley Financial, Inc., a Delaware corporation (\"BRF\"), is the parent company of BRCM. As a result, BRF, BRCM and BRPGP may be deemed to indirectly beneficially own the shares held by BRPLP. BRF is the parent company of B. Riley Securities, Inc., a Delaware corporation (\"BRS\"). As a result, BRF may be deemed to indirectly beneficially own the shares held by BRS. B. Riley Principal Investments, LLC (\"BRPI\") is the sole member of B. Riley Principal Sponsor Co. II, LLC (the \"Sponsor\") and is a wholly-owned subsidiary of BRF. BRPI and BRF may be deemed to indirectly beneficially own the shares held by the Sponsor."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Bryant R. Riley is the Co-Chief Executive Officer and Chairman of the Board of Directors of BRF. As a result, Bryant R. Riley may be deemed to indirectly beneficially own the shares of Common Stock directly held by BRF, BRS, BRPLP and the Sponsor. 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Each of BRPI and BRF disclaims beneficial ownership over any securities directly held by the Sponsor other than to the extent of any pecuniary interest it may have therein, directly or indirectly."}],"balance_after":4295000,"derivative":{"underlying":"Class A Common Stock","underlying_shares":656250},"source":{"system":"sec-edgar","filing":"0001213900-20-014309","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020014309/ownership.xml","form_type":"4/A","original_submission_date":"2020-05-22"}},{"id":3120718,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. 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Each of BRPI and BRF disclaims beneficial ownership over any securities directly held by the Sponsor other than to the extent of any pecuniary interest it may have therein, directly or indirectly."}],"balance_after":650000,"source":{"system":"sec-edgar","filing":"0001213900-20-014309","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020014309/ownership.xml","form_type":"4/A","original_submission_date":"2020-05-22"}},{"id":3120717,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. 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These shares were inadvertently omitted from the Form 4 filed by the reporting persons on May 22, 2020."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is the general partner of BRC Partners Opportunity Fund, L.P., a Delaware limited partnership (\"BRPLP\"). B. Riley Capital Management, LLC, a New York limited liability company (\"BRCM\"), is an investment advisor to BRPLP, and BRF is the parent company of BRCM. As a result, BRPGP, BRCM and BRF may be deemed to indirectly beneficially own the Shares held by BRPLP."}],"balance_after":50000,"source":{"system":"sec-edgar","filing":"0001213900-20-014309","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020014309/ownership.xml","form_type":"4/A","original_submission_date":"2020-05-22"}},{"id":3120716,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. 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These shares were inadvertently omitted from the Form 4 filed by the reporting persons on May 22, 2020."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"BRC Partners Management GP, LLC, a Delaware limited liability company (\"BRPGP\"), is the general partner of BRC Partners Opportunity Fund, L.P., a Delaware limited partnership (\"BRPLP\"). B. Riley Capital Management, LLC, a New York limited liability company (\"BRCM\"), is an investment advisor to BRPLP, and BRF is the parent company of BRCM. As a result, BRPGP, BRCM and BRF may be deemed to indirectly beneficially own the Shares held by BRPLP."}],"balance_after":33700,"source":{"system":"sec-edgar","filing":"0001213900-20-014309","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020014309/ownership.xml","form_type":"4/A","original_submission_date":"2020-05-22"}},{"id":3137536,"issuer":{"id":4901,"kind":"organization","name":"Eos Energy Enterprises, Inc.","symbol":"EOSE"},"owners":[{"id":6050,"kind":"organization","name":"BRC Group Holdings, Inc.","position":1,"cik":"0001464790","reported_name":"B. Riley Financial, Inc.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":135320,"kind":"organization","name":"B. Riley Principal Sponsor Co. II, LLC","position":2,"cik":"0001811637","reported_name":"B. Riley Principal Sponsor Co. 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Each of BRPI and BRF disclaims beneficial ownership over any securities directly held by the Sponsor other than to the extent of any pecuniary interest it may have therein, directly or indirectly."}],"balance_after":650000,"source":{"system":"sec-edgar","filing":"0001213900-20-013374","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1811637/000121390020013374/ownership.xml","form_type":"4"}}]}