15 insiders reported 85 Form 4 transactions for Accelerant Holdings (ARX) over the past 18 months (most recent 2026-08-25). Recent activity: Meriwether Karen Sue (Director) Sell 542 shares, Hasley Nancy (Director) Sell 20,489 shares, ONeill Francis James (Co-Founder, Chief U/W Officer) Sell 63,616 shares, ONeill Francis James (Co-Founder, Chief U/W Officer) Sell 89,219 shares, RADKE JEFFREY L (Co-Founder, CEO) Sell 80,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-25 | Meriwether Karen Sue | Director | Sell | 542 | $10,631 |
| 2026-08-14 | Hasley Nancy | Director | Sell | 20,489 | $400,839 |
| 2026-08-12 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 63,616 | $767,667 |
| 2026-08-12 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 89,219 | $1.1M |
| 2026-08-11 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80,000 | $967,096 |
| 2026-08-04 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80,000 | $964,528 |
| 2026-07-29 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 110,467 | $1.6M |
| 2026-07-29 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 104,647 | $1.5M |
| 2026-07-28 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80,000 | $1.2M |
| 2026-07-28 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 15,223 | $220,013 |
| 2026-07-27 | Sternberg Matthew David | COO, Risk Exchange | Sell | 3,910 | $53,841 |
| 2026-07-27 | Sternberg Matthew David | COO, Risk Exchange | Sell | 17,568 | $257,206 |
| 2026-07-20 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 14,777 | $211,279 |
| 2026-07-20 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80,000 | $1.1M |
| 2026-07-16 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 83,119 | $1.1M |
| 2026-07-16 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 82,767 | $1.1M |
| 2026-07-14 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80,000 | $1.1M |
| 2026-07-07 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80,000 | $1.1M |
| 2026-06-30 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80,000 | $1.0M |
| 2026-06-29 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 73,500 | $959,910 |
| 2026-06-29 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 73,500 | $968,730 |
| 2026-06-25 | Hasley Nancy | Director | Sell | 35,000 | $458,850 |
| 2026-06-25 | RADKE JEFFREY L | Co-Founder, CEO | Sell | 80,000 | $1.0M |
| 2026-06-24 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 70,536 | $931,781 |
| 2026-06-24 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 76,464 | $1.0M |
Source: SEC Form 4 filings · as of 2026-08-25