ARX · Insider Trading
Accelerant Holdings
Every open-market purchase and sale reported by ARX officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-25 | Karen Sue Meriwether | Director | Sell | −542 | −$10.63K |
| 2026-08-14 | Nancy Hasley | Director | Sell | −20,489 | −$400.84K |
| 2026-08-12 | Francis James ONeill | Co-Founder, Chief U/W Officer | Sell | −152,835 | −$1.87M |
| 2026-08-11 | Jeffrey L Radke | Co-Founder, CEO | Sell | −80,000 | −$967.10K |
| 2026-08-04 | Jeffrey L Radke | Co-Founder, CEO | Sell | −80,000 | −$964.53K |
| 2026-07-29 | Francis James ONeill | Co-Founder, Chief U/W Officer | Sell | −215,114 | −$3.14M |
| 2026-07-28 | Jeffrey L Radke | Co-Founder, CEO | Sell | −95,223 | −$1.39M |
| 2026-07-27 | Matthew David Sternberg | COO, Risk Exchange | MIXED | −21,478 | −$311.05K |
| 2026-07-20 | Jeffrey L Radke | Co-Founder, CEO | Sell | −94,777 | −$1.29M |
| 2026-07-16 | Francis James ONeill | Co-Founder, Chief U/W Officer | Sell | −165,886 | −$2.12M |
| 2026-07-14 | Jeffrey L Radke | Co-Founder, CEO | Sell | −80,000 | −$1.05M |
| 2026-07-07 | Jeffrey L Radke | Co-Founder, CEO | Sell | −80,000 | −$1.07M |
| 2026-06-29 | Francis James ONeill | Co-Founder, Chief U/W Officer | Sell | −147,000 | −$1.93M |
| 2026-06-25 | Nancy Hasley | Director | Sell | −35,000 | −$458.95K |
| 2026-06-25 | Jeffrey L Radke | Co-Founder, CEO | Sell | −80,000 | −$1.05M |
| 2026-06-24 | Francis James ONeill | Co-Founder, Chief U/W Officer | Sell | −147,000 | −$1.93M |
| 2026-05-15 | Karen Sue Meriwether | Director | A | +11,658 | — |
| 2026-05-15 | Simon Wainwright | Director | A | +23,316 | — |
| 2026-05-15 | Matthew David Sternberg | COO, Risk Exchange | A | +279,329 | — |
| 2026-05-15 | David George Paul Talach | Director | A | +23,316 | — |
| 2026-05-15 | Paul Christopher Little | Director | A | +11,658 | — |
| 2026-05-15 | Nancy Hasley | Director | A | +11,658 | — |
| 2026-03-24 | Jay Michael Green | Chief Financial Officer | Sell | −50,000 | −$638.28K |
| 2026-03-20 | Christopher Lee-Smith | Co-Founder, Head of Distrib. | A | +128,644 | — |
| 2026-03-20 | Matthew David Sternberg | COO, Risk Exchange | A | +180,667 | — |
| 2026-03-20 | Francis James ONeill | Co-Founder, Chief U/W Officer | A | +128,644 | — |
| 2026-03-20 | Jeffrey L Radke | Co-Founder, CEO | A | +300,171 | — |
| 2026-03-18 | Jay Michael Green | Chief Financial Officer | F | −28,625 | −$332.91K |
| 2026-02-04 | Jay Michael Green | Chief Financial Officer | F | −200,637 | −$2.56M |
| 2025-12-17 | Christopher Lee-Smith | Co-Founder, Head of Distrib. | Buy | +14,700 | +$197.24K |
| 2025-12-09 | Karen Sue Meriwether | Director | Buy | +542 | +$7.95K |
| 2025-11-20 | Samuel Gaynor | Director | Buy | +7,500 | +$100.77K |
| 2025-11-20 | Francis James ONeill | Co-Founder, Chief U/W Officer | Buy | +38,000 | +$506.81K |
| 2025-11-19 | Matthew David Sternberg | COO, Risk Exchange | Buy | +5,700 | +$74.70K |
| 2025-11-18 | Jeffrey L Radke | Co-Founder, CEO | Buy | +74,110 | +$999.37K |
| 2025-07-29 | Karen Sue Meriwether | Director | A | +9,210 | — |
| 2025-07-29 | Paul Christopher Little | Director | A | +9,210 | — |
| 2025-07-29 | Christopher Lee-Smith | Co-Founder, Head of Distrib. | C | +17,509,884 | — |
| 2025-07-29 | Nancy Hasley | General Counsel | MIXED | +1,898,696 | +$10.50K |
| 2025-07-29 | Jeffrey L Radke | Co-Founder, CEO | C | +28,228,687 | — |
| 2025-07-29 | Jay Michael Green | Chief Financial Officer | A | +1,454,851 | — |
| 2025-07-29 | Francis James ONeill | Co-Founder, Chief U/W Officer | C | +7,144,680 | — |
| 2025-07-29 | Matthew David Sternberg | COO, Risk Exchange | A | +152,264 | — |
| 2025-07-29 | ACP Accelerant Holdings, L.P. | 10%+ Owner | MIXED | — | −$730.56M |
| 2025-07-29 | Wendy Liisa Harrington | Director | MIXED | +23,315 | — |
| 2025-07-25 | Christopher Lee-Smith | Co-Founder, Head of Distrib. | A | +2,746,261 deriv. | — |
| 2025-07-25 | Francis James ONeill | Co-Founder, Chief U/W Officer | A | +882,611 deriv. | — |
| 2025-07-25 | Jeffrey L Radke | Co-Founder, CEO | A | +8,279,552 deriv. | — |
| 2025-07-25 | Wendy Liisa Harrington | Director | A | +209,515 deriv. | — |
| 2014-07-01 | Edward Wactlar | Sr. VP, Gen. Counsel & Sec. | MIXED | +6,115 | −$37.54K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Christopher Lee-Smith | Co-Founder, Head of Distrib. | 17,784,023 | $351.23M |
| Francis James ONeill | Co-Founder, Chief U/W Officer | 6,535,934 | $129.08M |
| ACP Accelerant Holdings, L.P. | 10%+ Owner | 2,670,456 | $52.74M |
| Nancy Hasley | General Counsel | 1,342,334 | $26.51M |
| Jay Michael Green | Chief Financial Officer | 1,175,589 | $23.22M |
| Matthew David Sternberg | COO, Risk Exchange | 596,482 | $11.78M |
| Jeffrey L Radke | Co-Founder, CEO | 583,603 | $11.53M |
| Simon Wainwright | Director | 23,316 | $460.49K |
| David George Paul Talach | Director | 23,316 | $460.49K |
| Karen Sue Meriwether | Director | 20,868 | $412.14K |
| Paul Christopher Little | Director | 20,868 | $412.14K |
| Wendy Liisa Harrington | Director | 9,210 | $181.90K |
| Samuel Gaynor | Director | 7,500 | $148.12K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the ARX quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.