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Accelerant Holdings

ARX
Exchange
NYSE
Industry
Insurance Agents, Brokers & Service
SEC CIK
0001997350

In the last 90 days, Accelerant Holdings insiders filed 0 open-market purchases and 14 sales; 116 institutions reported holding it in 13F filings for Q2 2026, worth $761.1M in total; Tiger Global Management is the only superinvestor holding it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Accelerant Holdings insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
14 filings
5 insiders, $17.5M in total
Insiders trading
5
Net value
−$17.5M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Accelerant Holdings, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Accelerant Holdings
NameTitleLast reported holdingLast filingFilings, past year
Meriwether Karen SueDirector20,868Aug 25, 20263
Hasley NancyDirector1,341,834Aug 14, 20263
ONeill Francis JamesCo-Founder, Chief U/W Officer6,369,290IndirectAug 12, 20267
Radke Jeffrey LCo-Founder, CEO27,591,939IndirectAug 11, 202610
Sternberg Matthew DavidCOO, Risk Exchange596,482Jul 27, 20264
Wainwright SimonDirector23,316May 15, 20261
Little Paul ChristopherDirector20,868May 15, 20261
Talach David George PaulDirector23,316May 15, 20261
Green Jay MichaelChief Financial Officer1,175,589Mar 24, 20263
Lee-Smith ChristopherCo-Founder, Head of Distrib.17,784,023Mar 20, 20262
Gaynor SamuelDirector7,500Nov 20, 20251
Schwartz Keoni AndrewDirector, 10% Owner0IndirectJul 29, 20250
ACP Accelerant Holdings, L.P.10% Owner0IndirectJul 29, 20250
ACP Insurance Management, LLC10% Owner0IndirectJul 29, 20250
Harrington Wendy LiisaDirector23,315Jul 29, 20250

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 25, 2026 (view filing)7:01 PM ETAug 214 daysMeriwether Karen SueDirectorSSaleClass A Common Shares−542$19.62−$10.6K−2.5%20.9K after
Aug 14, 2026 (view filing)4:34 PM ETAug 131 dayHasley NancyDirectorSSaleClass A Common Shares−20.5K$19.56−$400.8K−1.5%1.34M after10b5-1
Aug 12, 2026 (view filing)4:31 PM ETAug 10-112 daysONeill Francis JamesCo-Founder, Chief U/W OfficerSSaleClass A Common Shares−152.8K$12.27−$1.87M−2.3%6.37M after2 lots10b5-1
Aug 11, 2026 (view filing)5:25 PM ETAug 101 dayRadke Jeffrey LCo-Founder, CEOSSaleClass A Common Shares−80.0K$12.09−$967.1K−0.3%27.6M after10b5-1
Aug 4, 2026 (view filing)8:18 PM ETAug 31 dayRadke Jeffrey LCo-Founder, CEOSSaleClass A Common Shares−80.0K$12.06−$964.5K−0.3%27.7M after10b5-1
Jul 29, 2026 (view filing)6:25 PM ETJul 27-282 daysONeill Francis JamesCo-Founder, Chief U/W OfficerSSaleClass A Common Shares−215.1K$14.60−$3.14M−3.2%6.52M after2 lots10b5-1
Jul 28, 2026 (view filing)9:25 PM ETJul 271 dayRadke Jeffrey LCo-Founder, CEOSSaleClass A Common Shares−95.2K$14.60−$1.39M−0.3%27.8M after2 lots10b5-1
Jul 27, 2026 (view filing)9:38 PM ETJul 27Same daySternberg Matthew DavidCOO, Risk ExchangeSSaleClass A Common Shares−17.6K$14.64−$257.2K−2.9%596.5K after10b5-1
Jul 20, 2026 (view filing)8:52 PM ETJul 17-203 daysRadke Jeffrey LCo-Founder, CEOSSaleClass A Common Shares−94.8K$13.63−$1.29M−0.3%27.8M after2 lots10b5-1
Jul 16, 2026 (view filing)8:27 PM ETJul 14-152 daysONeill Francis JamesCo-Founder, Chief U/W OfficerSSaleClass A Common Shares−165.9K$12.78−$2.12M−2.4%6.74M after2 lots10b5-1
Jul 14, 2026 (view filing)6:34 PM ETJul 131 dayRadke Jeffrey LCo-Founder, CEOSSaleClass A Common Shares−80.0K$13.18−$1.05M−0.3%27.9M after10b5-1
Jul 7, 2026 (view filing)8:12 PM ETJul 61 dayRadke Jeffrey LCo-Founder, CEOSSaleClass A Common Shares−80.0K$13.33−$1.07M−0.3%28.0M after10b5-1
Jun 30, 2026 (view filing)Jun 291 dayRadke Jeffrey LCo-Founder, CEOSSaleClass A Common Shares−80.0K$12.87−$1.03M−0.3%28.1M after10b5-1
Jun 29, 2026 (view filing)Jun 25-264 daysONeill Francis JamesCo-Founder, Chief U/W OfficerSSaleClass A Common Shares−147.0K$13.12−$1.93M−2.1%6.90M after2 lots10b5-1
Jun 25, 2026 (view filing)Jun 232 daysHasley NancyDirectorSSaleClass A Common Shares−35.0K$13.11−$458.9K−2.5%1.36M after10b5-1
Jun 25, 2026 (view filing)Jun 232 daysRadke Jeffrey LCo-Founder, CEOSSaleClass A Common Shares−80.0K$13.11−$1.05M−0.3%28.2M after10b5-1
Jun 24, 2026 (view filing)Jun 22-232 daysONeill Francis JamesCo-Founder, Chief U/W OfficerSSaleClass A Common Shares−147.0K$13.16−$1.93M−2.0%7.05M after2 lots10b5-1
Mar 24, 2026 (view filing)Mar 231 dayGreen Jay MichaelChief Financial OfficerSSaleClass A Common Shares−50.0K$12.77−$638.5K−4.1%1.18M after10b5-1
Dec 17, 2025 (view filing)Nov 1928 daysLateLee-Smith ChristopherCo-Founder, Head of Distrib.PPurchaseClass A Common Shares+14.7K$13.42+$197.3K+0.1%17.7M after
Dec 9, 2025 (view filing)Dec 81 dayMeriwether Karen SueDirectorPPurchaseClass A Common Shares+542$14.67+$7.95K+5.9%9.75K after
Nov 20, 2025 (view filing)Nov 191 dayGaynor SamuelDirectorPPurchaseClass A Common Shares+7.50K$13.44+$100.8KNew position7.50K after
Nov 20, 2025 (view filing)Nov 182 daysONeill Francis JamesCo-Founder, Chief U/W OfficerPPurchaseClass A Common Shares+38.0K$13.34+$506.9K+0.5%7.24M after
Nov 19, 2025 (view filing)Nov 172 daysSternberg Matthew DavidCOO, Risk ExchangePPurchaseClass A Common Shares+5.70K$13.10+$74.7K+3.7%158.0K after
Nov 18, 2025 (view filing)Nov 144 daysRadke Jeffrey LCo-Founder, CEOPPurchaseClass A Common Shares+74.1K$13.48+$999.0K+0.3%28.3M after
Jul 29, 2025 (view filing)8:36 PM ETJul 254 daysSchwartz Keoni Andrew and 2 othersDirector, 10% OwnerSSaleClass A Common Shares−11.6M$21.00−$243.5M−100.0%0 after4 lots
Jul 29, 2025 (view filing)Jul 254 daysHasley NancyGeneral CounselPPurchaseClass A Common Shares+500$21.00+$10.5KNew position500 after