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(ii) 20% shall vest on the date on which the sustained stock price first exceeds $21.50 per share; (iii) 20% shall vest on the date on which the sustained stock price first exceeds $25.00 per share; and (iv) 20% shall vest on the date on which the sustained stock price first exceeds $30.00 per share."}],"balance_after":284125,"derivative":{"exercise_price":8.93,"expiration_date":"2025-10-03","underlying":"Common Stock","underlying_shares":284125},"source":{"system":"sec-edgar","filing":"0001628280-25-044067","document":"wk-form4_1759522834.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/874501/000162828025044067/wk-form4_1759522834.xml","form_type":"4"}},{"id":1025792,"issuer":{"id":6308,"kind":"organization","name":"OCTAVE SPECIALTY GROUP INC","symbol":"OSG"},"owners":[{"id":30881,"kind":"person","name":"Trick David","position":1,"cik":"0001480597","reported_name":"Trick David","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Exec VP, CFO & Treasurer"}}],"security":"Restricted Stock Units","published_at":"2025-10-03T20:19:49.000Z","date":"2025-10-03","kind":"grant","planned":false,"acquired":true,"shares":66519,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of the common stock of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On October 3, 2025 the reporting person received a special RSU grant that will vest and become non-forfeitable after one year (subject to limited exceptions), but will not settle until the earlier of the fifth (5) year anniversary of the grant date or the reporting person's termination date, provided such termination occurs after the one year vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On October 3, 2025 the reporting person received a special RSU grant that will vest and become non-forfeitable after one year (subject to limited exceptions), but will not settle until the earlier of the fifth (5) year anniversary of the grant date or the reporting person's termination date, provided such termination occurs after the one year vesting date."}],"balance_after":123439,"derivative":{"underlying":"Common Stock","underlying_shares":66519},"source":{"system":"sec-edgar","filing":"0001628280-25-044061","document":"wk-form4_1759522786.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/874501/000162828025044061/wk-form4_1759522786.xml","form_type":"4"}},{"id":1025791,"issuer":{"id":6308,"kind":"organization","name":"OCTAVE SPECIALTY GROUP INC","symbol":"OSG"},"owners":[{"id":30881,"kind":"person","name":"Trick David","position":1,"cik":"0001480597","reported_name":"Trick David","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Exec VP, CFO & Treasurer"}}],"security":"Performance Stock Option","published_at":"2025-10-03T20:19:49.000Z","date":"2025-10-03","kind":"grant","planned":false,"acquired":true,"shares":350375,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The Performance Stock Option shall be eligible to vest beginning one year after the grant date based on Ambac Financial Group, Inc.'s (the \"Company\") achievement of the certain price hurdles related to the shares of Common Stock, during the five (5) year period following the grant date as follows: (i) 40 % shall vest on the date on which the sustained stock price first exceeds $18.00 per share; (ii) 20% shall vest on the date on which the sustained stock price first exceeds $21.50 per share; (iii) 20% shall vest on the date on which the sustained stock price first exceeds $25.00 per share; and (iv) 20% shall vest on the date on which the sustained stock price first exceeds $30.00 per share."}],"balance_after":350375,"derivative":{"exercise_price":8.93,"expiration_date":"2025-10-03","underlying":"Common Stock","underlying_shares":350375},"source":{"system":"sec-edgar","filing":"0001628280-25-044061","document":"wk-form4_1759522786.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/874501/000162828025044061/wk-form4_1759522786.xml","form_type":"4"}},{"id":1025790,"issuer":{"id":6308,"kind":"organization","name":"OCTAVE SPECIALTY GROUP INC","symbol":"OSG"},"owners":[{"id":30884,"kind":"person","name":"LeBlanc Claude","position":1,"cik":"0001380820","reported_name":"LeBlanc Claude","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2025-10-03T20:19:01.000Z","date":"2025-10-03","kind":"grant","planned":false,"acquired":true,"shares":232816,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of the common stock of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On October 3, 2025 the reporting person received a special RSU grant that will vest and become non-forfeitable after one year (subject to limited exceptions), but will not settle until the earlier of the fifth (5) year anniversary of the grant date or the reporting person's termination date, provided such termination occurs after the one year vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On October 3, 2025 the reporting person received a special RSU grant that will vest and become non-forfeitable after one year (subject to limited exceptions), but will not settle until the earlier of the fifth (5) year anniversary of the grant date or the reporting person's termination date, provided such termination occurs after the one year vesting date."}],"balance_after":513617,"derivative":{"underlying":"Common Stock","underlying_shares":232816},"source":{"system":"sec-edgar","filing":"0001628280-25-044056","document":"wk-form4_1759522738.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/874501/000162828025044056/wk-form4_1759522738.xml","form_type":"4"}},{"id":1025789,"issuer":{"id":6308,"kind":"organization","name":"OCTAVE SPECIALTY GROUP INC","symbol":"OSG"},"owners":[{"id":30884,"kind":"person","name":"LeBlanc Claude","position":1,"cik":"0001380820","reported_name":"LeBlanc Claude","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2025-10-03T20:19:01.000Z","date":"2025-10-03","kind":"grant","planned":false,"acquired":true,"shares":45650,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one share of the common stock of the Company."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On October 3, 2025 the reporting person received a grant of 45,650 RSUs to replace a portion of the July 2025 Long Term Incentive Plan award previously determined to be void ab initio. These RSUs will vest in three equal annual installments commencing October 3, 2026, July 9, 2027, and July 9, 2028."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On October 3, 2025 the reporting person received a grant of 45,650 RSUs to replace a portion of the July 2025 Long Term Incentive Plan award previously determined to be void ab initio. These RSUs will vest in three equal annual installments commencing October 3, 2026, July 9, 2027, and July 9, 2028."}],"balance_after":280801,"derivative":{"underlying":"Common Stock","underlying_shares":45650},"source":{"system":"sec-edgar","filing":"0001628280-25-044056","document":"wk-form4_1759522738.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/874501/000162828025044056/wk-form4_1759522738.xml","form_type":"4"}},{"id":1025788,"issuer":{"id":6308,"kind":"organization","name":"OCTAVE SPECIALTY GROUP INC","symbol":"OSG"},"owners":[{"id":30884,"kind":"person","name":"LeBlanc Claude","position":1,"cik":"0001380820","reported_name":"LeBlanc Claude","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Performance Stock Option","published_at":"2025-10-03T20:19:01.000Z","date":"2025-10-03","kind":"grant","planned":false,"acquired":true,"shares":500000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The Performance Stock Option shall be eligible to vest beginning one year after the grant date based on Ambac Financial Group, Inc.'s (the \"Company\") achievement of the certain price hurdles related to the shares of Common Stock, during the five (5) year period following the grant date as follows: (i) 40 % shall vest on the date on which the sustained stock price first exceeds $18.00 per share; (ii) 20% shall vest on the date on which the sustained stock price first exceeds $21.50 per share; (iii) 20% shall vest on the date on which the sustained stock price first exceeds $25.00 per share; and (iv) 20% shall vest on the date on which the sustained stock price first exceeds $30.00 per share."}],"balance_after":500000,"derivative":{"exercise_price":8.93,"expiration_date":"2035-10-03","underlying":"Common Stock","underlying_shares":500000},"source":{"system":"sec-edgar","filing":"0001628280-25-044056","document":"wk-form4_1759522738.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/874501/000162828025044056/wk-form4_1759522738.xml","form_type":"4"}},{"id":1025786,"issuer":{"id":6308,"kind":"organization","name":"OCTAVE SPECIALTY GROUP INC","symbol":"OSG"},"owners":[{"id":30884,"kind":"person","name":"LeBlanc Claude","position":1,"cik":"0001380820","reported_name":"LeBlanc Claude","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Executive Officer"}}],"security":"Restricted Stock Units","published_at":"2025-10-03T20:18:11.000Z","date":"2025-07-09","kind":"grant","planned":false,"acquired":true,"shares":118045,"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 the common stock of Ambac Financial Group, Inc. (the \"Company\")."},{"field":"shares","element":"transactionShares","label":"F2","text":"This amendment reports the corrected number of RSUs granted to the reporting person on July 9, 2025.  At that time, 45,650 of the RSUs previously reported on that date were void ab initio and cancelled."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs will vest in three equal annual installments commencing  July 9, 2026, July 9, 2027, and July 9, 2028."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs will vest in three equal annual installments commencing  July 9, 2026, July 9, 2027, and July 9, 2028."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F2","text":"This amendment reports the corrected number of RSUs granted to the reporting person on July 9, 2025.  At that time, 45,650 of the RSUs previously reported on that date were void ab initio and cancelled."}],"balance_after":189501,"derivative":{"underlying":"Common Stock","underlying_shares":118045},"source":{"system":"sec-edgar","filing":"0001628280-25-044052","document":"wk-form4a_1759522686.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/874501/000162828025044052/wk-form4a_1759522686.xml","form_type":"4/A","original_submission_date":"2025-07-09"}},{"id":1028503,"issuer":{"id":6308,"kind":"organization","name":"OCTAVE SPECIALTY GROUP INC","symbol":"OSG"},"owners":[{"id":31855,"kind":"person","name":"Stein Jeffrey Scott","position":1,"cik":"0001559518","reported_name":"Stein Jeffrey Scott","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-10-02T20:07:58.000Z","date":"2025-10-01","kind":"grant","planned":false,"acquired":true,"shares":4126,"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 the common stock of Ambac Financial Group, Inc. 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RSUs that have become vested shall settle and convert into shares of common stock upon the date that the reporting person resigns from, or otherwise ceases to be a member of, the Board of Directors of the Company."}],"balance_after":4126,"derivative":{"underlying":"Common Stock","underlying_shares":4126},"source":{"system":"sec-edgar","filing":"0001628280-25-043693","document":"wk-form4_1759435675.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/874501/000162828025043693/wk-form4_1759435675.xml","form_type":"4"}},{"id":1028502,"issuer":{"id":6308,"kind":"organization","name":"OCTAVE SPECIALTY GROUP INC","symbol":"OSG"},"owners":[{"id":31854,"kind":"person","name":"PRICE MICHAEL D","position":1,"cik":"0001241508","reported_name":"PRICE MICHAEL D","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-10-02T20:07:12.000Z","date":"2025-10-01","kind":"grant","planned":false,"acquired":true,"shares":4126,"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 the common stock of Ambac Financial Group, Inc. (the \"Company\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"RSU's granted on October 1, 2025 shall vest one year later on October 1, 2026. RSUs that have become vested shall settle and convert into shares of common stock upon the date that the reporting person resigns from, or otherwise ceases to be a member of, the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"RSU's granted on October 1, 2025 shall vest one year later on October 1, 2026. RSUs that have become vested shall settle and convert into shares of common stock upon the date that the reporting person resigns from, or otherwise ceases to be a member of, the Board of Directors of the Company."}],"balance_after":4126,"derivative":{"underlying":"Common Stock","underlying_shares":4126},"source":{"system":"sec-edgar","filing":"0001628280-25-043690","document":"wk-form4_1759435630.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/874501/000162828025043690/wk-form4_1759435630.xml","form_type":"4"}},{"id":1028501,"issuer":{"id":6308,"kind":"organization","name":"OCTAVE SPECIALTY GROUP INC","symbol":"OSG"},"owners":[{"id":31853,"kind":"person","name":"Matus Kristi Ann","position":1,"cik":"0001543504","reported_name":"Matus Kristi Ann","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2025-10-02T20:06:16.000Z","date":"2025-10-01","kind":"grant","planned":false,"acquired":true,"shares":4126,"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 the common stock of Ambac Financial Group, Inc. (the \"Company\")."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"RSU's granted on October 1, 2025 shall vest one year later on October 1, 2026. RSUs that have become vested shall settle and convert into shares of common stock upon the date that the reporting person resigns from, or otherwise ceases to be a member of, the Board of Directors of the Company."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"RSU's granted on October 1, 2025 shall vest one year later on October 1, 2026. RSUs that have become vested shall settle and convert into shares of common stock upon the date that the reporting person resigns from, or otherwise ceases to be a member of, the Board of Directors of the Company."}],"balance_after":4126,"derivative":{"underlying":"Common Stock","underlying_shares":4126},"source":{"system":"sec-edgar","filing":"0001628280-25-043682","document":"wk-form4_1759435573.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/874501/000162828025043682/wk-form4_1759435573.xml","form_type":"4"}}],"next_cursor":"2025-10-02T20:06:16.000000Z,1028501"}