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These shares were sold in multiple transactions at prices ranging from $19.54 to $19.61, 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."}],"balance_after":1341834,"source":{"system":"sec-edgar","filing":"0001628280-26-057158","document":"wk-form4_1786739673.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026057158/wk-form4_1786739673.xml","form_type":"4"}},{"id":689550,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24244,"kind":"person","name":"ONeill Francis James","position":1,"cik":"0002008632","reported_name":"ONeill Francis James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Co-Founder, Chief U/W Officer"}}],"security":"Class A Common Shares","published_at":"2026-08-12T20:31:40.000Z","date":"2026-08-11","kind":"sale","planned":true,"acquired":false,"shares":89219,"price":12.4101,"value":1107216.7119,"ownership":{"direct":false,"nature":"By Famed Ventures Limited"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 23, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.055 to $12.570, 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."}],"balance_after":6369290,"source":{"system":"sec-edgar","filing":"0001628280-26-056260","document":"wk-form4_1786566696.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026056260/wk-form4_1786566696.xml","form_type":"4"}},{"id":689549,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24244,"kind":"person","name":"ONeill Francis James","position":1,"cik":"0002008632","reported_name":"ONeill Francis James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Co-Founder, Chief U/W Officer"}}],"security":"Class A Common Shares","published_at":"2026-08-12T20:31:40.000Z","date":"2026-08-10","kind":"sale","planned":true,"acquired":false,"shares":63616,"price":12.0672,"value":767666.9952,"ownership":{"direct":false,"nature":"By Famed Ventures Limited"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 23, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.89 to $12.3450, 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."}],"balance_after":6458509,"source":{"system":"sec-edgar","filing":"0001628280-26-056260","document":"wk-form4_1786566696.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026056260/wk-form4_1786566696.xml","form_type":"4"}},{"id":691017,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24708,"kind":"person","name":"RADKE JEFFREY L","position":1,"cik":"0001241965","reported_name":"RADKE JEFFREY L","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Founder, CEO"}}],"security":"Class A Common Shares","published_at":"2026-08-11T21:25:12.000Z","date":"2026-08-10","kind":"sale","planned":true,"acquired":false,"shares":80000,"price":12.0887,"value":967096.0,"ownership":{"direct":false,"nature":"By LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.89 to $12.335, 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Badly Bent LLC. The Reporting Person is the manager of the sole member of Badly Bent LLC. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein."}],"balance_after":27591939,"source":{"system":"sec-edgar","filing":"0001628280-26-055804","document":"wk-form4_1786483508.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026055804/wk-form4_1786483508.xml","form_type":"4"}},{"id":697606,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24708,"kind":"person","name":"RADKE JEFFREY L","position":1,"cik":"0001241965","reported_name":"RADKE JEFFREY L","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Founder, CEO"}}],"security":"Class A Common Shares","published_at":"2026-08-05T00:18:34.000Z","date":"2026-08-03","kind":"sale","planned":true,"acquired":false,"shares":80000,"price":12.0566,"value":964528.0,"ownership":{"direct":false,"nature":"By LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $11.815 to $12.235, 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Badly Bent LLC. The Reporting Person is the manager of the sole member of Badly Bent LLC. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein."}],"balance_after":27671939,"source":{"system":"sec-edgar","filing":"0001628280-26-052848","document":"wk-form4_1785889110.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026052848/wk-form4_1785889110.xml","form_type":"4"}},{"id":701599,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24244,"kind":"person","name":"ONeill Francis James","position":1,"cik":"0002008632","reported_name":"ONeill Francis James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Co-Founder, Chief U/W Officer"}}],"security":"Class A Common Shares","published_at":"2026-07-29T22:25:56.000Z","date":"2026-07-28","kind":"sale","planned":true,"acquired":false,"shares":104647,"price":14.558,"value":1523451.026,"ownership":{"direct":false,"nature":"By Famed Ventures Limited"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 23, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.15 to $14.95, 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."}],"balance_after":6522125,"source":{"system":"sec-edgar","filing":"0001628280-26-050691","document":"wk-form4_1785363953.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026050691/wk-form4_1785363953.xml","form_type":"4"}},{"id":701598,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24244,"kind":"person","name":"ONeill Francis James","position":1,"cik":"0002008632","reported_name":"ONeill Francis James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Co-Founder, Chief U/W Officer"}}],"security":"Class A Common Shares","published_at":"2026-07-29T22:25:56.000Z","date":"2026-07-27","kind":"sale","planned":true,"acquired":false,"shares":110467,"price":14.6308,"value":1616220.5836,"ownership":{"direct":false,"nature":"By Famed Ventures Limited"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 23, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.38 to $14.83, 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."}],"balance_after":6626772,"source":{"system":"sec-edgar","filing":"0001628280-26-050691","document":"wk-form4_1785363953.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026050691/wk-form4_1785363953.xml","form_type":"4"}},{"id":702341,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24708,"kind":"person","name":"RADKE JEFFREY L","position":1,"cik":"0001241965","reported_name":"RADKE JEFFREY L","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Founder, CEO"}}],"security":"Class A Common Shares","published_at":"2026-07-29T01:25:03.000Z","date":"2026-07-27","kind":"sale","planned":true,"acquired":false,"shares":15223,"price":14.4527,"value":220013.4521,"ownership":{"direct":false,"nature":"By LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.29 to $14.66, 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Badly Bent LLC. The Reporting Person is the manager of the sole member of Badly Bent LLC. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein."}],"balance_after":27751939,"source":{"system":"sec-edgar","filing":"0001628280-26-050312","document":"wk-form4_1785288300.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026050312/wk-form4_1785288300.xml","form_type":"4"}},{"id":702340,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24708,"kind":"person","name":"RADKE JEFFREY L","position":1,"cik":"0001241965","reported_name":"RADKE JEFFREY L","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Founder, CEO"}}],"security":"Class A Common Shares","published_at":"2026-07-29T01:25:03.000Z","date":"2026-07-27","kind":"sale","planned":true,"acquired":false,"shares":80000,"price":14.6315,"value":1170520.0,"ownership":{"direct":false,"nature":"By LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.40 to $14.83, 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Badly Bent LLC. The Reporting Person is the manager of the sole member of Badly Bent LLC. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein."}],"balance_after":27767162,"source":{"system":"sec-edgar","filing":"0001628280-26-050312","document":"wk-form4_1785288300.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026050312/wk-form4_1785288300.xml","form_type":"4"}},{"id":703079,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":28597,"kind":"person","name":"Sternberg Matthew David","position":1,"cik":"0002008628","reported_name":"Sternberg Matthew David","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"COO, Risk Exchange"}}],"security":"Class A Common Shares","published_at":"2026-07-28T01:38:12.000Z","date":"2026-07-27","kind":"sale","planned":true,"acquired":false,"shares":17568,"price":14.6406,"value":257206.0608,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 7, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.44 to $14.84, 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."}],"balance_after":596482,"source":{"system":"sec-edgar","filing":"0001628280-26-049906","document":"wk-form4_1785202688.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026049906/wk-form4_1785202688.xml","form_type":"4"}},{"id":703078,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":28597,"kind":"person","name":"Sternberg Matthew David","position":1,"cik":"0002008628","reported_name":"Sternberg Matthew David","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"COO, Risk Exchange"}}],"security":"Class A Common Shares","published_at":"2026-07-28T01:38:12.000Z","date":"2026-07-23","kind":"tax_withholding","planned":true,"acquired":false,"shares":3910,"price":13.77,"value":53840.7,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents Class A Common Shares withheld, pursuant to Issuer policy, to satisfy tax withholding obligations upon the settlement of vested Restricted Share Units.  Does not reflect a discretionary transaction nor an open market sale of securities."}],"balance_after":614050,"source":{"system":"sec-edgar","filing":"0001628280-26-049906","document":"wk-form4_1785202688.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026049906/wk-form4_1785202688.xml","form_type":"4"}},{"id":705890,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24708,"kind":"person","name":"RADKE JEFFREY L","position":1,"cik":"0001241965","reported_name":"RADKE JEFFREY L","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Founder, CEO"}}],"security":"Class A Common Shares","published_at":"2026-07-21T00:52:03.000Z","date":"2026-07-20","kind":"sale","planned":true,"acquired":false,"shares":80000,"price":13.5068,"value":1080544.0,"ownership":{"direct":false,"nature":"By LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $13.08 to $13.705 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Badly Bent LLC. The Reporting Person is the manager of the sole member of Badly Bent LLC. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein."}],"balance_after":27847162,"source":{"system":"sec-edgar","filing":"0001628280-26-048906","document":"wk-form4_1784595119.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026048906/wk-form4_1784595119.xml","form_type":"4"}},{"id":705889,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24708,"kind":"person","name":"RADKE JEFFREY L","position":1,"cik":"0001241965","reported_name":"RADKE JEFFREY L","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Founder, CEO"}}],"security":"Class A Common Shares","published_at":"2026-07-21T00:52:03.000Z","date":"2026-07-17","kind":"sale","planned":true,"acquired":false,"shares":14777,"price":14.2978,"value":211278.5906,"ownership":{"direct":false,"nature":"By LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $14.295 to $14.30, 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Badly Bent LLC. The Reporting Person is the manager of the sole member of Badly Bent LLC. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein."}],"balance_after":27927162,"source":{"system":"sec-edgar","filing":"0001628280-26-048906","document":"wk-form4_1784595119.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026048906/wk-form4_1784595119.xml","form_type":"4"}},{"id":708270,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24244,"kind":"person","name":"ONeill Francis James","position":1,"cik":"0002008632","reported_name":"ONeill Francis James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Co-Founder, Chief U/W Officer"}}],"security":"Class A Common Shares","published_at":"2026-07-17T00:27:29.000Z","date":"2026-07-15","kind":"sale","planned":true,"acquired":false,"shares":82767,"price":12.711,"value":1052051.337,"ownership":{"direct":false,"nature":"By Famed Ventures Limited"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 23, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.37 to $12.89, 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."}],"balance_after":6737239,"source":{"system":"sec-edgar","filing":"0001628280-26-048550","document":"wk-form4_1784248046.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026048550/wk-form4_1784248046.xml","form_type":"4"}},{"id":708269,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24244,"kind":"person","name":"ONeill Francis James","position":1,"cik":"0002008632","reported_name":"ONeill Francis James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Co-Founder, Chief U/W Officer"}}],"security":"Class A Common Shares","published_at":"2026-07-17T00:27:29.000Z","date":"2026-07-14","kind":"sale","planned":true,"acquired":false,"shares":83119,"price":12.8447,"value":1067638.6193,"ownership":{"direct":false,"nature":"By Famed Ventures Limited"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 23, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.61 to $13.38, 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."}],"balance_after":6820006,"source":{"system":"sec-edgar","filing":"0001628280-26-048550","document":"wk-form4_1784248046.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026048550/wk-form4_1784248046.xml","form_type":"4"}},{"id":709936,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24708,"kind":"person","name":"RADKE JEFFREY L","position":1,"cik":"0001241965","reported_name":"RADKE JEFFREY L","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Founder, CEO"}}],"security":"Class A Common Shares","published_at":"2026-07-14T22:34:32.000Z","date":"2026-07-13","kind":"sale","planned":true,"acquired":false,"shares":80000,"price":13.1762,"value":1054096.0,"ownership":{"direct":false,"nature":"By LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.755 to $13.49, 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Badly Bent LLC. The Reporting Person is the manager of the sole member of Badly Bent LLC. 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These shares were sold in multiple transactions at prices ranging from $12.63 to $13.80, 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Badly Bent LLC. The Reporting Person is the manager of the sole member of Badly Bent LLC. 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These shares were sold in multiple transactions at prices ranging from $12.8750 to $13.78, inclusive. 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These shares were sold in multiple transactions at prices ranging from $12.79 to $13.25, 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."}],"balance_after":6976625,"source":{"system":"sec-edgar","filing":"0001628280-26-046119","document":"wk-form4_1782781962.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026046119/wk-form4_1782781962.xml","form_type":"4"}},{"id":726713,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":23443,"kind":"person","name":"Hasley Nancy","position":1,"cik":"0002012400","reported_name":"Hasley Nancy","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Class A Common Shares","published_at":"2026-06-26T01:49:49.000Z","date":"2026-06-23","kind":"sale","planned":true,"acquired":false,"shares":35000,"price":13.1128,"value":458948.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 8, 2025 and amended on March 24, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.89 to $13.28, 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."}],"balance_after":1362323,"source":{"system":"sec-edgar","filing":"0001628280-26-045642","document":"wk-form4_1782438585.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026045642/wk-form4_1782438585.xml","form_type":"4"}},{"id":726710,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24708,"kind":"person","name":"RADKE JEFFREY L","position":1,"cik":"0001241965","reported_name":"RADKE JEFFREY L","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Founder, CEO"}}],"security":"Class A Common Shares","published_at":"2026-06-26T01:24:06.000Z","date":"2026-06-23","kind":"sale","planned":true,"acquired":false,"shares":80000,"price":13.1076,"value":1048608.0,"ownership":{"direct":false,"nature":"By LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 24, 2026."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.95 to $13.28, 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Badly Bent LLC. The Reporting Person is the manager of the sole member of Badly Bent LLC. 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These shares were sold in multiple transactions at prices ranging from $12.79 to $13.30, 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."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Famed Ventures Limited. 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These shares were sold in multiple transactions at prices ranging from $12.23 to $13.13, 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."}],"balance_after":1175589,"source":{"system":"sec-edgar","filing":"0001628280-26-020867","document":"wk-form4_1774390812.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026020867/wk-form4_1774390812.xml","form_type":"4"}},{"id":832624,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24708,"kind":"person","name":"RADKE JEFFREY L","position":1,"cik":"0001241965","reported_name":"RADKE JEFFREY L","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"other":false,"officer_title":"Co-Founder, CEO"}}],"security":"Class A Common Shares","published_at":"2026-03-20T23:28:50.000Z","date":"2026-03-18","kind":"grant","planned":false,"acquired":true,"shares":300171,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of Restricted Stock Units granted on March 18, 2026.  The RSUs are scheduled to vest as to twenty-five percent (25%) of the RSUs on the one-year anniversary of the Grant Date and as to six and one-quarter percent (6-1/4%) of the RSUs on the first day of each of the twelve (12) calendar quarters beginning after such anniversary."}],"balance_after":333652,"source":{"system":"sec-edgar","filing":"0001628280-26-020283","document":"wk-form4_1774049327.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026020283/wk-form4_1774049327.xml","form_type":"4"}},{"id":832622,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24244,"kind":"person","name":"ONeill Francis James","position":1,"cik":"0002008632","reported_name":"ONeill Francis James","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Co-Founder, Chief U/W Officer"}}],"security":"Class A Common Shares","published_at":"2026-03-20T23:19:24.000Z","date":"2026-03-18","kind":"grant","planned":false,"acquired":true,"shares":128644,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of Restricted Stock Units granted on March 18, 2026.  The RSUs are scheduled to vest as to twenty-five percent (25%) of the RSUs on the one-year anniversary of the Grant Date and as to six and one-quarter percent (6-1/4%) of the RSUs on the first day of each of the twelve (12) calendar quarters beginning after such anniversary."}],"balance_after":7363769,"source":{"system":"sec-edgar","filing":"0001628280-26-020280","document":"wk-form4_1774048761.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026020280/wk-form4_1774048761.xml","form_type":"4"}},{"id":832623,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":56887,"kind":"person","name":"Lee-Smith Christopher","position":1,"cik":"0002008627","reported_name":"Lee-Smith Christopher","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Co-Founder, Head of Distrib."}}],"security":"Class A Common Shares","published_at":"2026-03-20T23:05:13.000Z","date":"2026-03-18","kind":"grant","planned":false,"acquired":true,"shares":128644,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of Restricted Stock Units granted on March 18, 2026.  The RSUs are scheduled to vest as to twenty-five percent (25%) of the RSUs on the one-year anniversary of the Grant Date and as to six and one-quarter percent (6-1/4%) of the RSUs on the first day of each of the twelve (12) calendar quarters beginning after such anniversary."}],"balance_after":17784023,"source":{"system":"sec-edgar","filing":"0001628280-26-020278","document":"wk-form4_1774047909.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026020278/wk-form4_1774047909.xml","form_type":"4"}},{"id":832621,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":28597,"kind":"person","name":"Sternberg Matthew David","position":1,"cik":"0002008628","reported_name":"Sternberg Matthew David","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"COO, Risk Exchange"}}],"security":"Class A Common Shares","published_at":"2026-03-20T22:43:58.000Z","date":"2026-03-18","kind":"grant","planned":false,"acquired":true,"shares":180667,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of Restricted Stock Units granted on March 18, 2026.  The RSUs are scheduled to vest as to twenty-five percent (25%) of the RSUs on the one-year anniversary of the Grant Date and as to six and one-quarter percent (6-1/4%) of the RSUs on the first day of each of the twelve (12) calendar quarters beginning after such anniversary."}],"balance_after":338631,"source":{"system":"sec-edgar","filing":"0001628280-26-020273","document":"wk-form4_1774046635.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026020273/wk-form4_1774046635.xml","form_type":"4"}},{"id":835464,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":56338,"kind":"person","name":"Green Jay Michael","position":1,"cik":"0002008767","reported_name":"Green Jay Michael","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Class A Common Shares","published_at":"2026-03-18T23:24:02.000Z","date":"2026-03-17","kind":"tax_withholding","planned":false,"acquired":false,"shares":28625,"price":11.63,"value":332908.75,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents Class A Common Shares withheld, pursuant to Issuer policy, to satisfy tax withholding obligations upon the settlement of vested Restricted Stock Units.  Does not reflect a discretionary transaction nor an open market sale of securities."}],"balance_after":1225589,"source":{"system":"sec-edgar","filing":"0002008767-26-000002","document":"wk-form4_1773876238.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000200876726000002/wk-form4_1773876238.xml","form_type":"4"}},{"id":919762,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":56338,"kind":"person","name":"Green Jay Michael","position":1,"cik":"0002008767","reported_name":"Green Jay Michael","relationship":{"officer":true,"officer_title":"Chief Financial Officer"}}],"security":"Class A Common Shares","published_at":"2026-02-04T21:05:48.000Z","date":"2026-02-02","kind":"tax_withholding","planned":false,"acquired":false,"shares":200637,"price":12.76,"value":2560128.12,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents Class A Common Shares withheld, pursuant to Issuer policy, to satisfy tax withholding obligations upon the settlement of vested Restricted Stock Units.  Does not reflect a discretionary transaction nor an open market sale of securities."}],"balance_after":1254214,"source":{"system":"sec-edgar","filing":"0000905148-26-000493","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514826000493/form4.xml","form_type":"4"}},{"id":965547,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":56887,"kind":"person","name":"Lee-Smith Christopher","position":1,"cik":"0002008627","reported_name":"Lee-Smith Christopher","relationship":{"director":true,"officer":true,"officer_title":"Co-Founder, Head of Distrib."}}],"security":"Class A Common Shares","published_at":"2025-12-18T02:04:04.000Z","date":"2025-11-19","kind":"purchase","planned":false,"acquired":true,"shares":14700,"price":13.4177,"value":197240.19,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This transaction was executed in multiple trades at prices ranging from $13.15 to $13.58, inclusive. The price reported in Column 4 above reflects the weighted average purchase 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 Class A Common Shares purchased at each respective price within the range set forth in footnote 1 of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"This number reflects a minor adjustment to account for a correction in the number of Class A Common Shares reported as beneficially owned by the Reporting Person following the closing of the Issuer's initial public offering on July 25, 2025, as reported in the Form 4 filed by the Reporting Person on July 29, 2025."}],"balance_after":17655379,"source":{"system":"sec-edgar","filing":"0000905148-25-004395","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825004395/form4.xml","form_type":"4"}},{"id":976463,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":20021,"kind":"person","name":"Meriwether Karen Sue","position":1,"cik":"0002009232","reported_name":"Meriwether Karen Sue","relationship":{"director":true}}],"security":"Class A Common Shares","published_at":"2025-12-09T21:09:45.000Z","date":"2025-12-08","kind":"purchase","planned":false,"acquired":true,"shares":542,"price":14.6695,"value":7950.869,"ownership":{"direct":true},"balance_after":9752,"source":{"system":"sec-edgar","filing":"0000905148-25-004282","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825004282/form4.xml","form_type":"4"}},{"id":992778,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":72843,"kind":"person","name":"Gaynor Samuel","position":1,"cik":"0002009241","reported_name":"Gaynor Samuel","relationship":{"director":true}}],"security":"Class A Common Shares","published_at":"2025-11-20T21:17:43.000Z","date":"2025-11-19","kind":"purchase","planned":false,"acquired":true,"shares":7500,"price":13.4365,"value":100773.75,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 above reflects the weighted average purchase price. This transaction was executed in multiple trades at prices ranging from $13.18 to $13.59, inclusive. 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 Class A Common Shares purchased at each respective price within the range set forth in footnote 1 of this Form 4."}],"balance_after":7500,"source":{"system":"sec-edgar","filing":"0000905148-25-004152","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825004152/form4.xml","form_type":"4"}},{"id":992777,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24244,"kind":"person","name":"ONeill Francis James","position":1,"cik":"0002008632","reported_name":"ONeill Francis James","relationship":{"officer":true,"officer_title":"Co-Founder, Chief U/W Officer"}}],"security":"Class A Common Shares","published_at":"2025-11-20T21:12:47.000Z","date":"2025-11-18","kind":"purchase","planned":false,"acquired":true,"shares":38000,"price":13.3371,"value":506809.8,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 above reflects the weighted average purchase price. This transaction was executed in multiple trades at prices ranging from $12.84 to $13.70, inclusive. 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 Class A Common Shares purchased at each respective price within the range set forth in footnote 1 of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"This number reflects a minor adjustment to account for a correction in the number of Class A Common Shares reported as beneficially owned by the Reporting Person following the closing of the Issuer's initial public offering on July 25, 2025, as reported in the Form 4 filed by the Reporting Person on July 29, 2025."}],"balance_after":7235125,"source":{"system":"sec-edgar","filing":"0000905148-25-004151","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825004151/form4.xml","form_type":"4"}},{"id":994258,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":28597,"kind":"person","name":"Sternberg Matthew David","position":1,"cik":"0002008628","reported_name":"Sternberg Matthew David","relationship":{"officer":true,"officer_title":"COO, Risk Exchange"}}],"security":"Class A Common Shares","published_at":"2025-11-19T21:11:23.000Z","date":"2025-11-17","kind":"purchase","planned":false,"acquired":true,"shares":5700,"price":13.1045,"value":74695.65,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 above reflects the weighted average purchase price. This transaction was executed in multiple trades at prices ranging from $13.08 to $13.12, inclusive. 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 Class A Common Shares purchased at each respective price within the range set forth in footnote 1 of this Form 4."}],"balance_after":157964,"source":{"system":"sec-edgar","filing":"0000905148-25-004138","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825004138/form4.xml","form_type":"4"}},{"id":996234,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":24708,"kind":"person","name":"RADKE JEFFREY L","position":1,"cik":"0001241965","reported_name":"RADKE JEFFREY L","relationship":{"director":true,"officer":true,"ten_percent_owner":true,"officer_title":"Co-Founder, CEO"}}],"security":"Class A Common Shares","published_at":"2025-11-18T13:23:44.000Z","date":"2025-11-14","kind":"purchase","planned":false,"acquired":true,"shares":74110,"price":13.4849,"value":999365.939,"ownership":{"direct":false,"nature":"By LLC"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 above reflects the weighted average purchase price. This transaction was executed in multiple trades at prices ranging from $13.15 to $13.83, inclusive. 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 Class A Common Shares purchased at each respective price within the range set forth in footnote 1 of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"These numbers reflect minor adjustments to account for a correction in the number of Class A Common Shares reported as directly and indirectly beneficially owned by the Reporting Person following the closing of the Issuer's initial public offering on July 25, 2025, as reported in the Form 4 filed by the Reporting Person on July 29, 2025."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held directly by Badly Bent LLC. The Reporting Person is the manager of the sole member of Badly Bent LLC. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein."}],"balance_after":28261939,"source":{"system":"sec-edgar","filing":"0000905148-25-004108","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825004108/form4.xml","form_type":"4"}},{"id":1079961,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":28597,"kind":"person","name":"Sternberg Matthew David","position":1,"cik":"0002008628","reported_name":"Sternberg Matthew David","relationship":{"officer":true,"officer_title":"COO, Risk Exchange"}}],"security":"Class A Common Shares","published_at":"2025-07-30T00:39:07.000Z","date":"2025-07-25","kind":"grant","planned":false,"acquired":true,"shares":152264,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents Restricted Stock Units (\"RSUs\"), each one of which represents the contingent right to receive one Class A Common Share."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Represents Restricted Stock Units (\"RSUs\"), each one of which represents the contingent right to receive one Class A Common Share."}],"balance_after":152264,"source":{"system":"sec-edgar","filing":"0000905148-25-002640","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002640/form4.xml","form_type":"4"}},{"id":1079982,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Redeemable Preference Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"other","planned":false,"acquired":false,"shares":909791,"price":31.55,"value":28703906.05,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F9","text":"In connection with the Issuer's IPO, ACP Accelerant Co-Invest, LLC elected to have these Redeemable Preference Shares redeemed at a redemption price of $31.55 per share."},{"field":"kind","element":"transactionCoding","label":"F9","text":"In connection with the Issuer's IPO, ACP Accelerant Co-Invest, LLC elected to have these Redeemable Preference Shares redeemed at a redemption price of $31.55 per share."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"In connection with the Issuer's IPO, ACP Accelerant Co-Invest, LLC elected to have these Redeemable Preference Shares redeemed at a redemption price of $31.55 per share."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F9","text":"In connection with the Issuer's IPO, ACP Accelerant Co-Invest, LLC elected to have these Redeemable Preference Shares redeemed at a redemption price of $31.55 per share."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"These securities are held directly by ACP Accelerant Co-Invest, LLC. Each of (i) ACP Insurance Management, LLC, as the managing member of ACP Accelerant Co-Invest, LLC, and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Common Shares","underlying_shares":909791},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":21,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079981,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class B Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":false,"shares":326312,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"kind","element":"transactionCoding","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"These securities are held directly by ACP Accelerant Investment Holding Company II, Ltd. ACP Accelerant Holdings, L.P. is the sole owner of ACP Accelerant Investment Holding Company II, Ltd. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":3302263,"derivative":{"underlying":"Class A Common Shares","underlying_shares":326312},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":20,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079980,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class B Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":true,"shares":3628575,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the Issuer's initial public offering (\"IPO\"), these limited partnership interests of Accelerant Holdings LP were exchanged for Class B Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"These securities are held directly by ACP Accelerant Investment Holding Company II, Ltd. ACP Accelerant Holdings, L.P. is the sole owner of ACP Accelerant Investment Holding Company II, Ltd. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":3628575,"derivative":{"underlying":"Class A Common Shares","underlying_shares":3628575},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":19,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079979,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Convertible Preference Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":false,"shares":3628575,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"In connection with the Issuer's IPO, these shares of the Issuer's Preference Shares automatically converted into Class B Common Shares of the Issuer at a 1-for-1 conversion rate."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"In connection with the Issuer's IPO, these shares of the Issuer's Preference Shares automatically converted into Class B Common Shares of the Issuer at a 1-for-1 conversion rate."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"In connection with the Issuer's IPO, these shares of the Issuer's Preference Shares automatically converted into Class B Common Shares of the Issuer at a 1-for-1 conversion rate."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"These securities are held directly by ACP Accelerant Investment Holding Company II, Ltd. ACP Accelerant Holdings, L.P. is the sole owner of ACP Accelerant Investment Holding Company II, Ltd. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Class B Common Shares","underlying_shares":3628575},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079978,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class B Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":false,"shares":488131,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"kind","element":"transactionCoding","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"These securities are held directly by ACP Accelerant Co-Invest, LLC. Each of (i) ACP Insurance Management, LLC, as the managing member of ACP Accelerant Co-Invest, LLC, and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":4939839,"derivative":{"underlying":"Class A Common Shares","underlying_shares":488131},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079977,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class B Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":true,"shares":5427970,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the Issuer's initial public offering (\"IPO\"), these limited partnership interests of Accelerant Holdings LP were exchanged for Class B Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"These securities are held directly by ACP Accelerant Co-Invest, LLC. Each of (i) ACP Insurance Management, LLC, as the managing member of ACP Accelerant Co-Invest, LLC, and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":5427970,"derivative":{"underlying":"Class A Common Shares","underlying_shares":5427970},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079976,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Convertible Preference Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":false,"shares":5427970,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"In connection with the Issuer's IPO, these shares of the Issuer's Preference Shares automatically converted into Class B Common Shares of the Issuer at a 1-for-1 conversion rate."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"In connection with the Issuer's IPO, these shares of the Issuer's Preference Shares automatically converted into Class B Common Shares of the Issuer at a 1-for-1 conversion rate."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"In connection with the Issuer's IPO, these shares of the Issuer's Preference Shares automatically converted into Class B Common Shares of the Issuer at a 1-for-1 conversion rate."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"These securities are held directly by ACP Accelerant Co-Invest, LLC. Each of (i) ACP Insurance Management, LLC, as the managing member of ACP Accelerant Co-Invest, LLC, and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Class B Common Shares","underlying_shares":5427970},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079975,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class B Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":false,"shares":2670456,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"kind","element":"transactionCoding","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"These securities are held directly by ACP Accelerant Investment Holding Company, Ltd. ACP Accelerant Holdings, L.P. is the sole owner of ACP Accelerant Investment Holding Company, Ltd. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Class A Common Shares","underlying_shares":2670456},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079974,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class B Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":true,"shares":2670456,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the Issuer's initial public offering (\"IPO\"), these limited partnership interests of Accelerant Holdings LP were exchanged for Class B Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"These securities are held directly by ACP Accelerant Investment Holding Company, Ltd. ACP Accelerant Holdings, L.P. is the sole owner of ACP Accelerant Investment Holding Company, Ltd. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":2670456,"derivative":{"underlying":"Class A Common Shares","underlying_shares":2670456},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079973,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"LP Interests of Accelerant Holdings LP","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":false,"shares":100,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In connection with the Issuer's initial public offering (\"IPO\"), these limited partnership interests of Accelerant Holdings LP were exchanged for Class B Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"In connection with the Issuer's initial public offering (\"IPO\"), these limited partnership interests of Accelerant Holdings LP were exchanged for Class B Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"In connection with the Issuer's initial public offering (\"IPO\"), these limited partnership interests of Accelerant Holdings LP were exchanged for Class B Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"These securities are held directly by ACP Accelerant Investment Holding Company, Ltd. ACP Accelerant Holdings, L.P. is the sole owner of ACP Accelerant Investment Holding Company, Ltd. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Class B Common Shares","underlying_shares":2670456},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079972,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class B Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":false,"shares":8111253,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"kind","element":"transactionCoding","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"These securities are held directly by ACP Accelerant Holdings, L.P. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Keoni Schwartz (\"Mr. Schwartz\"), as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":82085342,"derivative":{"underlying":"Class A Common Shares","underlying_shares":8111253},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079971,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class B Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":true,"shares":90196595,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"In connection with the Issuer's initial public offering (\"IPO\"), these limited partnership interests of Accelerant Holdings LP were exchanged for Class B Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Each holder of Class B Common Shares has the right to convert their Class B Common Shares into Class A Common Shares on a 1-for-1 basis at any time and at their option. Additionally, Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, immediately following a transfer to any non-permitted holder of Class B Common Shares, and all outstanding Class B Common Shares will automatically convert into Class A Common Shares, on a 1-for-1 basis, on the earlier of: (i) if at any time following the consummation of the IPO, the holders of the Class B Common Shares immediately prior to the consummation of the IPO hold less than 50% of the total Class B Common Shares then in issue, and (ii) the third anniversary of the consummation of the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"These securities are held directly by ACP Accelerant Holdings, L.P. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Keoni Schwartz (\"Mr. Schwartz\"), as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":90196595,"derivative":{"underlying":"Class A Common Shares","underlying_shares":90196595},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079970,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"LP Interests of Accelerant Holdings LP","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":false,"shares":8491134079,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In connection with the Issuer's initial public offering (\"IPO\"), these limited partnership interests of Accelerant Holdings LP were exchanged for Class B Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"In connection with the Issuer's initial public offering (\"IPO\"), these limited partnership interests of Accelerant Holdings LP were exchanged for Class B Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"In connection with the Issuer's initial public offering (\"IPO\"), these limited partnership interests of Accelerant Holdings LP were exchanged for Class B Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"These securities are held directly by ACP Accelerant Holdings, L.P. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Keoni Schwartz (\"Mr. Schwartz\"), as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":0,"derivative":{"underlying":"Class B Common Shares","underlying_shares":90196595},"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079969,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class A Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"sale","planned":false,"acquired":false,"shares":326312,"price":21,"value":6852552.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"These securities are held directly by ACP Accelerant Investment Holding Company II, Ltd. ACP Accelerant Holdings, L.P. is the sole owner of ACP Accelerant Investment Holding Company II, Ltd. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079968,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class A Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":true,"shares":326312,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F8","text":"These securities are held directly by ACP Accelerant Investment Holding Company II, Ltd. ACP Accelerant Holdings, L.P. is the sole owner of ACP Accelerant Investment Holding Company II, Ltd. Each of (i) ACP Insurance Management, LLC, as the general partner of ACP Accelerant Holdings, L.P., and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":326312,"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079967,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class A Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"sale","planned":false,"acquired":false,"shares":488131,"price":21,"value":10250751.0,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"These securities are held directly by ACP Accelerant Co-Invest, LLC. Each of (i) ACP Insurance Management, LLC, as the managing member of ACP Accelerant Co-Invest, LLC, and (ii) Mr. Schwartz, as the sole owner and managing member of ACP Insurance Management, LLC, may be deemed to have voting and dispositive power over these securities, but disclaim beneficial ownership over these securities except to the extent of their respective pecuniary interest therein, if any."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000905148-25-002639","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000090514825002639/form4.xml","form_type":"4"}},{"id":1079966,"issuer":{"id":4013,"kind":"organization","name":"Accelerant Holdings"},"owners":[{"id":77119,"kind":"person","name":"Schwartz Keoni Andrew","position":1,"cik":"0002009246","reported_name":"Schwartz Keoni Andrew","relationship":{"director":true,"ten_percent_owner":true}},{"id":77120,"kind":"organization","name":"ACP Accelerant Holdings, L.P.","position":2,"cik":"0002078270","reported_name":"ACP Accelerant Holdings, L.P.","relationship":{"ten_percent_owner":true}},{"id":77121,"kind":"organization","name":"ACP Insurance Management, LLC","position":3,"cik":"0002078277","reported_name":"ACP Insurance Management, LLC","relationship":{"ten_percent_owner":true}}],"security":"Class A Common Shares","published_at":"2025-07-30T00:36:24.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":true,"shares":488131,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"These Class B Common Shares converted into Class A Common Shares on a 1-for-1 basis and then were sold pursuant to an underwriting agreement dated as of July 23, 2025, by and among the Issuer, the selling stockholders, and the underwriters named therein in connection with the Issuer's IPO."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F7","text":"These securities are held directly by ACP Accelerant Co-Invest, LLC. 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ACP Accelerant Holdings, L.P. is the sole owner of ACP Accelerant Investment Holding Company, Ltd. 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The actual exercise price for this option is $19.31."},{"field":"kind","element":"transactionCoding","label":"F2","text":"In connection with the Issuer's initial public offering, the Reporting Person received RSUs in replacement of his existing stock options."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"In connection with the Issuer's initial public offering, the Reporting Person received RSUs in replacement of his existing stock options."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Fifty percent (50%) of the Class A Common Shares subject to the option vested on each of the first two anniversaries of October 1, 2022, in each case subject to the Reporting Person's continuous employment."}],"balance_after":0,"derivative":{"exercise_price":19.31,"expiration_date":"2033-09-01","underlying":"Class A Common 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