{"transactions":[{"id":3383409,"issuer":{"id":154032,"kind":"organization","name":"NRC GROUP HOLDINGS CORP.","symbol":"NRCG"},"owners":[{"id":154112,"kind":"person","name":"BAYER MICHAEL J","position":1,"cik":"0001230974","reported_name":"BAYER MICHAEL J","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Non-Qualified Stock Option (Right to Buy)","published_at":"2019-11-01T12:04:29.000Z","date":"2019-11-01","kind":"disposition_to_issuer","acquired":true,"shares":25000,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Pursuant to the merger agreement between NRC Group Holdings Corp. (the \"Issuer\"), US Ecology, Inc., US Ecology Parent, Inc. (\"Holdco\"), Rooster Merger Sub, Inc. and ECOL Merger Sub, Inc. (the \"Merger Agreement\"), this option, which provided for vesting in three substantially equal annual installments beginning October 17, 2019, was assumed by Holdco and replaced with an option to purchase 4,900 shares of Holdco common stock at an exercise price of $52.30 per share in accordance with the terms of the Merger Agreement. This option was subject to accelerated vesting and became immediately vested and exercisable upon completion of the merger transactions."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Pursuant to the merger agreement between NRC Group Holdings Corp. (the \"Issuer\"), US Ecology, Inc., US Ecology Parent, Inc. (\"Holdco\"), Rooster Merger Sub, Inc. and ECOL Merger Sub, Inc. (the \"Merger Agreement\"), this option, which provided for vesting in three substantially equal annual installments beginning October 17, 2019, was assumed by Holdco and replaced with an option to purchase 4,900 shares of Holdco common stock at an exercise price of $52.30 per share in accordance with the terms of the Merger Agreement. This option was subject to accelerated vesting and became immediately vested and exercisable upon completion of the merger transactions."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Pursuant to the merger agreement between NRC Group Holdings Corp. (the \"Issuer\"), US Ecology, Inc., US Ecology Parent, Inc. (\"Holdco\"), Rooster Merger Sub, Inc. and ECOL Merger Sub, Inc. (the \"Merger Agreement\"), this option, which provided for vesting in three substantially equal annual installments beginning October 17, 2019, was assumed by Holdco and replaced with an option to purchase 4,900 shares of Holdco common stock at an exercise price of $52.30 per share in accordance with the terms of the Merger Agreement. This option was subject to accelerated vesting and became immediately vested and exercisable upon completion of the merger transactions."}],"balance_after":0,"derivative":{"exercise_price":10.25,"expiration_date":"2029-04-05","underlying":"Common Stock","underlying_shares":25000},"source":{"system":"sec-edgar","filing":"0001213900-19-021770","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1230974/000121390019021770/ownership.xml","form_type":"4"}},{"id":3472361,"issuer":{"id":6205,"kind":"organization","name":"SIGA TECHNOLOGIES INC"},"owners":[{"id":154112,"kind":"person","name":"BAYER MICHAEL J","position":1,"cik":"0001230974","reported_name":"BAYER MICHAEL J","relationship":{"director":true}}],"security":"Common Stock, par value $.0001 per share","published_at":"2019-07-02T21:06:54.000Z","date":"2019-06-04","kind":"purchase","acquired":true,"shares":12500,"price":5.74,"value":71750.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The totals in Column 4 reflects the number of shares beneficially owned by the Reporting Person as of the date of this report."}],"balance_after":132244,"source":{"system":"sec-edgar","filing":"0001140361-19-012354","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1010086/000114036119012354/form4.xml","form_type":"4"}},{"id":3472360,"issuer":{"id":6205,"kind":"organization","name":"SIGA TECHNOLOGIES INC"},"owners":[{"id":154112,"kind":"person","name":"BAYER MICHAEL J","position":1,"cik":"0001230974","reported_name":"BAYER MICHAEL J","relationship":{"director":true}}],"security":"Common Stock, par value $.0001 per share","published_at":"2019-07-02T21:06:54.000Z","date":"2014-10-16","kind":"sale","acquired":false,"shares":13960,"price":1.49,"value":20800.4,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The Reporting Person undertakes to provide to SIGA Technologies, Inc. (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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The totals in Column 4 reflects the number of shares beneficially owned by the Reporting Person as of the date of this report."}],"balance_after":119744,"source":{"system":"sec-edgar","filing":"0001140361-19-012354","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1010086/000114036119012354/form4.xml","form_type":"4"}},{"id":3472359,"issuer":{"id":6205,"kind":"organization","name":"SIGA TECHNOLOGIES INC"},"owners":[{"id":154112,"kind":"person","name":"BAYER MICHAEL J","position":1,"cik":"0001230974","reported_name":"BAYER MICHAEL J","relationship":{"director":true}}],"security":"Common Stock, par value $.0001 per share","published_at":"2019-07-02T20:59:51.000Z","date":"2013-09-17","kind":"purchase","acquired":true,"shares":8284,"price":3.59,"value":29739.56,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The Form 4 originally filed by the Reporting Person on September 18, 2013 overstated the number of shares purchased on September 17, 2013. As a result the number of shares beneficially owned following the transaction was also overstated on that filing and on each of the nine subsequent Forms 4 filed by the Reporting Person. This amendment corrects the number of shares purchased and the number of shares beneficially owned following the reported transaction as of September 17, 2013."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The Reporting Person undertakes to provide to SIGA Technologies, Inc. (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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Form 4 originally filed by the Reporting Person on September 18, 2013 overstated the number of shares purchased on September 17, 2013. As a result the number of shares beneficially owned following the transaction was also overstated on that filing and on each of the nine subsequent Forms 4 filed by the Reporting Person. This amendment corrects the number of shares purchased and the number of shares beneficially owned following the reported transaction as of September 17, 2013."}],"balance_after":13960,"source":{"system":"sec-edgar","filing":"0001140361-19-012352","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1010086/000114036119012352/form4.xml","form_type":"4/A","original_submission_date":"2013-09-18"}},{"id":3515801,"issuer":{"id":6205,"kind":"organization","name":"SIGA TECHNOLOGIES INC"},"owners":[{"id":154112,"kind":"person","name":"BAYER MICHAEL J","position":1,"cik":"0001230974","reported_name":"BAYER MICHAEL J","relationship":{"director":true}}],"security":"Restricted Stock 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(the \"Issuer\") granted on October 30, 2008 and the related surrender to the Issuer of 14,756 shares of common stock of the Issuer by the Reporting Person in order to effect the option exercise. 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converts into one share of common stock of SIGA Technologies, Inc. on a one for one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs were granted on May 23, 2017, and vested on the first anniversary of such date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs were granted on May 23, 2017, and vested on the first anniversary of such date."}],"balance_after":0,"derivative":{"underlying":"Common Stock, par value $.0001 per share","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001140361-18-025345","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1010086/000114036118025345/form4.xml","form_type":"4"}},{"id":3920995,"issuer":{"id":6205,"kind":"organization","name":"SIGA TECHNOLOGIES INC"},"owners":[{"id":154112,"kind":"person","name":"BAYER MICHAEL 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