ARX (Accelerant Holdings)
Insider Trading Activity
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.
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-25 | Karen Sue Meriwether | Director | Sell | — | — |
| 2026-08-14 | Nancy Hasley | Director | Sell | — | — |
| 2026-08-12 | Francis James ONeill | Co-Founder, Chief U/W Officer | Sell | — | — |
| 2026-08-11 | JEFFREY L RADKE | Co-Founder, CEO | Sell | — | — |
| 2026-08-04 | JEFFREY L RADKE | Co-Founder, CEO | Sell | — | — |
| 2026-07-29 | Francis James ONeill | Co-Founder, Chief U/W Officer | Sell | — | — |
| 2026-07-28 | JEFFREY L RADKE | Co-Founder, CEO | Sell | — | — |
| 2026-07-27 | Matthew David Sternberg | COO, Risk Exchange | MIXED | — | — |
| 2026-07-20 | JEFFREY L RADKE | Co-Founder, CEO | Sell | — | — |
| 2026-07-16 | Francis James ONeill | Co-Founder, Chief U/W Officer | Sell | — | — |
| 2026-07-14 | JEFFREY L RADKE | Co-Founder, CEO | Sell | — | — |
| 2026-07-07 | JEFFREY L RADKE | Co-Founder, CEO | Sell | — | — |
| 2026-06-29 | Francis James ONeill | Co-Founder, Chief U/W Officer | Sell | — | — |
| 2026-06-25 | Nancy Hasley | Director | Sell | — | — |
| 2026-06-25 | JEFFREY L RADKE | Co-Founder, CEO | Sell | — | — |
| 2026-06-24 | Francis James ONeill | Co-Founder, Chief U/W Officer | Sell | — | — |
| 2026-05-15 | Karen Sue Meriwether | Director | A | — | — |
| 2026-05-15 | Simon Wainwright | Director | A | — | — |
| 2026-05-15 | Matthew David Sternberg | COO, Risk Exchange | A | — | — |
| 2026-05-15 | David George Paul Talach | Director | A | — | — |
| 2026-05-15 | Paul Christopher Little | Director | A | — | — |
| 2026-05-15 | Nancy Hasley | Director | A | — | — |
| 2026-03-24 | Jay Michael Green | Chief Financial Officer | Sell | — | — |
| 2026-03-20 | Christopher Lee-Smith | Co-Founder, Head of Distrib. | A | — | — |
| 2026-03-20 | Matthew David Sternberg | COO, Risk Exchange | A | — | — |
| 2026-03-20 | Francis James ONeill | Co-Founder, Chief U/W Officer | A | — | — |
| 2026-03-20 | JEFFREY L RADKE | Co-Founder, CEO | A | — | — |
| 2026-03-18 | Jay Michael Green | Chief Financial Officer | F | — | — |
| 2026-02-04 | Jay Michael Green | Chief Financial Officer | F | — | — |
| 2025-12-17 | Christopher Lee-Smith | Co-Founder, Head of Distrib. | Buy | — | — |
| 2025-12-09 | Karen Sue Meriwether | Director | Buy | — | — |
| 2025-11-20 | Samuel Gaynor | Director | Buy | — | — |
| 2025-11-20 | Francis James ONeill | Co-Founder, Chief U/W Officer | Buy | — | — |
| 2025-11-19 | Matthew David Sternberg | COO, Risk Exchange | Buy | — | — |
| 2025-11-18 | JEFFREY L RADKE | Co-Founder, CEO | Buy | — | — |
| 2025-07-29 | Karen Sue Meriwether | Director | A | — | — |
| 2025-07-29 | Paul Christopher Little | Director | A | — | — |
| 2025-07-29 | Christopher Lee-Smith | Co-Founder, Head of Distrib. | C | — | — |
| 2025-07-29 | Nancy Hasley | General Counsel | MIXED | — | — |
| 2025-07-29 | JEFFREY L RADKE | Co-Founder, CEO | C | — | — |
| 2025-07-29 | Jay Michael Green | Chief Financial Officer | A | — | — |
| 2025-07-29 | Francis James ONeill | Co-Founder, Chief U/W Officer | C | — | — |
| 2025-07-29 | Matthew David Sternberg | COO, Risk Exchange | A | — | — |
| 2025-07-29 | ACP Accelerant Holdings, L.P. | 10%+ Owner | MIXED | — | — |
| 2025-07-29 | Wendy Liisa Harrington | Director | MIXED | — | — |
| 2025-07-25 | Christopher Lee-Smith | Co-Founder, Head of Distrib. | A | — | — |
| 2025-07-25 | Francis James ONeill | Co-Founder, Chief U/W Officer | A | — | — |
| 2025-07-25 | JEFFREY L RADKE | Co-Founder, CEO | A | — | — |
| 2025-07-25 | Wendy Liisa Harrington | Director | A | — | — |
| 2014-07-01 | Edward Wactlar | Sr. VP, Gen. Counsel & Sec. | MIXED | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Co-Founder, Head of Distrib. | 17,784,023 | — |
| — | Co-Founder, Chief U/W Officer | 6,535,934 | — |
| — | 10%+ Owner | 2,670,456 | — |
| — | General Counsel | 1,342,334 | — |
| — | Chief Financial Officer | 1,175,589 | — |
| — | COO, Risk Exchange | 596,482 | — |
| — | Co-Founder, CEO | 583,603 | — |
| — | Director | 23,316 | — |
| — | Director | 23,316 | — |
| — | Director | 20,868 | — |
| — | Director | 20,868 | — |
| — | Director | 9,210 | — |
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.