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The reporting person is subject to a lock-up agreement that expires at the close of business on June 26, 2026, that was entered into with the representatives of the underwriters in connection with an underwritten public offering of the Issuer's Class A common stock (the \"Offering\").  The sale of shares is a permissible exemption under the terms of the lock-up agreement."}],"balance_after":58550,"source":{"system":"sec-edgar","filing":"0001884307-26-000006","document":"wk-form4_1781642117.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000188430726000006/wk-form4_1781642117.xml","form_type":"4"}},{"id":833638,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-03-19T20:06:04.000Z","date":"2026-03-17","kind":"exercise","planned":false,"acquired":false,"shares":32348,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs vested in full on March 17, 2026. The RSUs had no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs vested in full on March 17, 2026. The RSUs had no expiration date."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":32348},"source":{"system":"sec-edgar","filing":"0001884307-26-000004","document":"wk-form4_1773950760.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000188430726000004/wk-form4_1773950760.xml","form_type":"4"}},{"id":833637,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2026-03-19T20:06:04.000Z","date":"2026-03-18","kind":"sale","planned":false,"acquired":false,"shares":10000,"price":16.5019,"value":165019.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"The sales reported on this Form 4 represent the number of shares sold by the Reporting Person to cover tax obligations in connection with the vesting of RSUs."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $16.49 to $16.56, inclusive. The price reported above reflects the weighted average sales price. The Reporting Person hereby undertakes to provide to the Securities and Exchange Commission staff, the Issuer, or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected."}],"balance_after":63550,"source":{"system":"sec-edgar","filing":"0001884307-26-000004","document":"wk-form4_1773950760.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000188430726000004/wk-form4_1773950760.xml","form_type":"4"}},{"id":833636,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2026-03-19T20:06:04.000Z","date":"2026-03-17","kind":"exercise","planned":false,"acquired":true,"shares":32348,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."}],"balance_after":73550,"source":{"system":"sec-edgar","filing":"0001884307-26-000004","document":"wk-form4_1773950760.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000188430726000004/wk-form4_1773950760.xml","form_type":"4"}},{"id":841820,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2026-03-16T20:02:59.000Z","date":"2026-03-12","kind":"grant","planned":false,"acquired":true,"shares":10658,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest in full on March 12, 2027, the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors of the Issuer through the applicable vesting date. The RSUs have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest in full on March 12, 2027, the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors of the Issuer through the applicable vesting date. The RSUs have no expiration date."}],"balance_after":10658,"derivative":{"underlying":"Class A Common Stock","underlying_shares":10658},"source":{"system":"sec-edgar","filing":"0001884307-26-000002","document":"wk-form4_1773691377.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000188430726000002/wk-form4_1773691377.xml","form_type":"4"}},{"id":1194754,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2025-03-21T20:10:52.000Z","date":"2025-03-20","kind":"exercise","planned":false,"acquired":false,"shares":11341,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This RSU award was granted on March 20, 2024 and vested entirely on March 20, 2025. The RSUs have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This RSU award was granted on March 20, 2024 and vested entirely on March 20, 2025. The RSUs have no expiration date."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":11341},"source":{"system":"sec-edgar","filing":"0001868941-25-000050","document":"wk-form4_1742587845.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000186894125000050/wk-form4_1742587845.xml","form_type":"4"}},{"id":1194753,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-03-21T20:10:52.000Z","date":"2025-03-20","kind":"exercise","planned":false,"acquired":true,"shares":11341,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."}],"balance_after":41202,"source":{"system":"sec-edgar","filing":"0001868941-25-000050","document":"wk-form4_1742587845.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000186894125000050/wk-form4_1742587845.xml","form_type":"4"}},{"id":1197282,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2025-03-19T20:11:35.000Z","date":"2025-03-17","kind":"grant","planned":false,"acquired":true,"shares":32348,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs will vest in full on the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors of the Issuer through the applicable vesting date. The RSUs have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs will vest in full on the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors of the Issuer through the applicable vesting date. The RSUs have no expiration date."}],"balance_after":32348,"derivative":{"underlying":"Class A Common Stock","underlying_shares":32348},"source":{"system":"sec-edgar","filing":"0001868941-25-000037","document":"wk-form4_1742415089.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000186894125000037/wk-form4_1742415089.xml","form_type":"4"}},{"id":1256078,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2025-02-20T21:04:39.000Z","date":"2025-02-18","kind":"purchase","planned":false,"acquired":true,"shares":7000,"price":6.9854,"value":48897.8,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were purchased in multiple open market transactions at prices ranging from $6.97 to $6.99, inclusive. The Reporting Person undertakes to provide to Fluence Energy, Inc. (\"Fluence\"), any security holder of Fluence, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the range indicated in this footnote."}],"balance_after":29861,"source":{"system":"sec-edgar","filing":"0001868941-25-000027","document":"wk-form4_1740085473.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000186894125000027/wk-form4_1740085473.xml","form_type":"4"}},{"id":1563589,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2024-03-22T20:12:38.000Z","date":"2024-03-20","kind":"grant","planned":false,"acquired":true,"shares":11341,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs will vest in full on the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors of the Issuer through the applicable vesting date. The RSUs have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs will vest in full on the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors of the Issuer through the applicable vesting date. The RSUs have no expiration date."}],"balance_after":11341,"derivative":{"underlying":"Class A Common Stock","underlying_shares":11341},"source":{"system":"sec-edgar","filing":"0001868941-24-000028","document":"wk-form4_1711138338.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000186894124000028/wk-form4_1711138338.xml","form_type":"4"}},{"id":1563588,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2024-03-22T20:12:38.000Z","date":"2024-03-20","kind":"exercise","planned":false,"acquired":false,"shares":10926,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"This RSU award was granted on March 20, 2023 and vested entirely on March 20, 2024.  The RSUs have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"This RSU award was granted on March 20, 2023 and vested entirely on March 20, 2024.  The RSUs have no expiration date."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":10926},"source":{"system":"sec-edgar","filing":"0001868941-24-000028","document":"wk-form4_1711138338.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000186894124000028/wk-form4_1711138338.xml","form_type":"4"}},{"id":1563587,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2024-03-22T20:12:38.000Z","date":"2024-03-20","kind":"exercise","planned":false,"acquired":true,"shares":10926,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."}],"balance_after":22861,"source":{"system":"sec-edgar","filing":"0001868941-24-000028","document":"wk-form4_1711138338.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000186894124000028/wk-form4_1711138338.xml","form_type":"4"}},{"id":1943263,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2023-03-21T20:06:23.000Z","date":"2023-03-20","kind":"grant","planned":false,"acquired":true,"shares":10926,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The restricted stock units will vest in full upon the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The restricted stock units will vest in full upon the first anniversary of the date of grant, subject to the reporting person's continued service on the Board of Directors through the applicable vesting date."}],"balance_after":10926,"derivative":{"underlying":"Class A Common Stock","underlying_shares":10926},"source":{"system":"sec-edgar","filing":"0001868941-23-000029","document":"wf-form4_167942916649152.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000186894123000029/wf-form4_167942916649152.xml","form_type":"4"}},{"id":1943262,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Unit","published_at":"2023-03-21T20:06:23.000Z","date":"2023-03-19","kind":"exercise","planned":false,"acquired":false,"shares":7364,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vested on March 19, 2023. The RSUs have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vested on March 19, 2023. The RSUs have no expiration date."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":7364},"source":{"system":"sec-edgar","filing":"0001868941-23-000029","document":"wf-form4_167942916649152.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000186894123000029/wf-form4_167942916649152.xml","form_type":"4"}},{"id":1943261,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Stock","published_at":"2023-03-21T20:06:23.000Z","date":"2023-03-19","kind":"exercise","planned":false,"acquired":true,"shares":7364,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A Common Stock of the Issuer."}],"balance_after":11935,"source":{"system":"sec-edgar","filing":"0001868941-23-000029","document":"wf-form4_167942916649152.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000186894123000029/wf-form4_167942916649152.xml","form_type":"4"}},{"id":2128627,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz Harald","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2022-11-01T20:33:14.000Z","date":"2022-10-28","kind":"exercise","acquired":false,"shares":3571,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of Class A common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vested on October 28, 2022. The RSUs have no expiration date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vested on October 28, 2022. The RSUs have no expiration date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Form 4 filed on March 24, 2022 inadvertently aggregated the above two RSU awards in column 9 of Table II, which are being reported separately hereby."}],"balance_after":0,"derivative":{"underlying":"Class A Common Stock","underlying_shares":3571},"source":{"system":"sec-edgar","filing":"0001104659-22-113520","document":"tm2229368-4_4seq1.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1868941/000110465922113520/tm2229368-4_4seq1.xml","form_type":"4"}},{"id":2128626,"issuer":{"id":4531,"kind":"organization","name":"Fluence Energy, Inc.","symbol":"FLNC"},"owners":[{"id":37738,"kind":"person","name":"von Heynitz Harald","position":1,"cik":"0001884307","reported_name":"von Heynitz 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