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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":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":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":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. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein."}],"balance_after":27941939,"source":{"system":"sec-edgar","filing":"0001628280-26-048218","document":"wk-form4_1784068468.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026048218/wk-form4_1784068468.xml","form_type":"4"}},{"id":713846,"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":"2026-07-08T00:12:23.000Z","date":"2026-07-06","kind":"sale","planned":true,"acquired":false,"shares":80000,"price":13.3278,"value":1066224.0,"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 $13.18 to $13.69, 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":28021939,"source":{"system":"sec-edgar","filing":"0001628280-26-047575","document":"wk-form4_1783469540.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026047575/wk-form4_1783469540.xml","form_type":"4"}},{"id":723001,"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":"2026-06-30T21:01:04.000Z","date":"2026-06-29","kind":"sale","planned":true,"acquired":false,"shares":80000,"price":12.8735,"value":1029880.0,"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 $12.63 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. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein."}],"balance_after":28101939,"source":{"system":"sec-edgar","filing":"0001628280-26-046281","document":"wk-form4_1782853261.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026046281/wk-form4_1782853261.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. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein."}],"balance_after":28181939,"source":{"system":"sec-edgar","filing":"0001628280-26-045640","document":"wk-form4_1782437040.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1997350/000162828026045640/wk-form4_1782437040.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":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":1079960,"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":"LP Interests of Accelerant Holdings LP","published_at":"2025-07-30T00:31:36.000Z","date":"2025-07-25","kind":"exercise","planned":false,"acquired":false,"shares":24372,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Trust"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"In connection with the Issuer's initial public offering, these limited partnership interests of Accelerant Holdings LP were exchanged for Class A 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, these limited partnership interests of Accelerant Holdings LP were exchanged for Class A 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, these limited partnership interests of Accelerant Holdings LP were exchanged for Class A Common Shares of the Issuer in proportion to the economic interests represented by the limited partnership interests."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"These securities are held in trust for the benefit of the Reporting Person's spousal equivalent, who is the trustee of the trust. 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