X0609 4 2026-08-10 0 0001997350 Accelerant Holdings ARX 0001241965 RADKE JEFFREY L true UNIT 106, WINDWARD 3 REGATTA OFFICE PARK, WEST BAY ROAD GRAND CAYMAN E9 KY1-1108 CAYMAN ISLANDS 1 1 1 0 Co-Founder, CEO 1 Class A Common Shares 2026-08-10 4 S 0 80000 12.0887 D 27591939 I By LLC Class A Common Shares 249951 I By Trust Class A Common Shares 333652 D 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. 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. 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. These securities are held in trust for the benefit of the Reporting Person's spouse, who is the trustee of the trust. The Reporting Person disclaims beneficial ownership over these securities, except to the extent of his pecuniary interest therein. /s/ Robert L. Villasenor, attorney-in-fact for Jeffrey L Radke 2026-08-11