v3.26.1
Document and Entity Information
Aug. 13, 2026
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001997350
Document Type 8-K
Document Period End Date Aug. 13, 2026
Entity Registrant Name Accelerant Holdings
Entity Incorporation State Country Code E9
Entity File Number 001-42765
Entity Tax Identification Number 98-1753044
Entity Address, Address Line One c/o Accelerant Re (Cayman) Ltd.
Entity Address, Address Line Two Unit 106, Windward 3, Regatta Office Park,
Entity Address, Address Line Three West Bay Road
Entity Address, City or Town Grand Cayman
Entity Address, Postal Zip Code KY1-1108
Entity Address, Country KY
Country Region 1
City Area Code 345
Local Phone Number 743-4611
Written Communications false
Soliciting Material true
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Class A common shares, $0.0000011951862 par value per share
Trading Symbol ARX
Security Exchange Name NYSE
Entity Emerging Growth Company true
Entity Ex Transition Period true