Accelerant Holdings (ARX) · Insider trading
What Accelerant Holdings's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$1.89M
6 insiders, 6 trades
Sold, 12 months
$21.58M
6 insiders, 100% under a plan
Net, 12 months
−$19.69M
bought less sold
Latest filing
2026-08-25
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Schwartz Keoni AndrewDirector, 10% owner | – | $243.52M | 4 | 2025-07-25 | – |
| ONeill Francis JamesCo-Founder, Chief U/W Officer | $506,920 | $11.00M | 11 | 2026-08-11 | – |
| Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | $999,003 | $8.81M | 11 | 2026-08-10 | – |
| Hasley NancyDirector | $10,500 | $859,615 | 3 | 2026-08-13 | 1,341,834 |
| Green Jay MichaelChief Financial Officer | – | $638,500 | 1 | 2026-03-23 | 1,175,589 |
| Sternberg Matthew DavidCOO, Risk Exchange | $74,670 | $257,196 | 2 | 2026-07-27 | 596,482 |
| Lee-Smith ChristopherDirector, Co-Founder, Head of Distrib. | $197,274 | – | 1 | 2025-11-19 | 17,655,379 |
| Gaynor SamuelDirector | $100,800 | – | 1 | 2025-11-19 | 7,500 |
| Meriwether Karen SueDirector | $7,951 | $10,634 | 2 | 2026-08-21 | 20,868 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-21 | Meriwether Karen SueDirector | Sale | 542 | 19.62 | $10,634 | 20,868 | Form 4 |
| 2026-08-13 | Hasley NancyDirector | Saleplan | 20,489 | 19.56 | $400,765 | 1,341,834 | Form 4 |
| 2026-08-11 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Saleplanindirect | 89,219 | 12.41 | $1.11M | 6,369,290 | Form 4 |
| 2026-08-10 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Saleplanindirect | 63,616 | 12.07 | $767,845 | 6,458,509 | Form 4 |
| 2026-08-10 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Saleplanindirect | 80,000 | 12.09 | $967,200 | 27,591,939 | Form 4 |
| 2026-08-03 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Saleplanindirect | 80,000 | 12.06 | $964,800 | 27,671,939 | Form 4 |
| 2026-07-28 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Saleplanindirect | 104,647 | 14.56 | $1.52M | 6,522,125 | Form 4 |
| 2026-07-27 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Saleplanindirect | 110,467 | 14.63 | $1.62M | 6,626,772 | Form 4 |
| 2026-07-27 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Saleplanindirect | 80,000 | 14.63 | $1.17M | 27,767,162 | Form 4 |
| 2026-07-27 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Saleplanindirect | 15,223 | 14.45 | $219,972 | 27,751,939 | Form 4 |
| 2026-07-27 | Sternberg Matthew DavidCOO, Risk Exchange | Saleplan | 17,568 | 14.64 | $257,196 | 596,482 | Form 4 |
| 2026-07-20 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Saleplanindirect | 80,000 | 13.51 | $1.08M | 27,847,162 | Form 4 |
| 2026-07-17 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Saleplanindirect | 14,777 | 14.30 | $211,311 | 27,927,162 | Form 4 |
| 2026-07-15 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Saleplanindirect | 82,767 | 12.71 | $1.05M | 6,737,239 | Form 4 |
| 2026-07-14 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Saleplanindirect | 83,119 | 12.84 | $1.07M | 6,820,006 | Form 4 |
| 2026-07-13 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Saleplanindirect | 80,000 | 13.18 | $1.05M | 27,941,939 | Form 4 |
| 2026-07-06 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Saleplanindirect | 80,000 | 13.33 | $1.07M | 28,021,939 | Form 4 |
| 2026-06-29 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Saleplanindirect | 80,000 | 12.87 | $1.03M | 28,101,939 | Form 4 |
| 2026-06-26 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Saleplanindirect | 73,500 | 13.18 | $968,730 | 6,903,125 | Form 4 |
| 2026-06-25 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Saleplanindirect | 73,500 | 13.06 | $959,910 | 6,976,625 | Form 4 |
| 2026-06-23 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Saleplanindirect | 80,000 | 13.11 | $1.05M | 28,181,939 | Form 4 |
| 2026-06-23 | Hasley NancyDirector | Saleplan | 35,000 | 13.11 | $458,850 | 1,362,323 | Form 4 |
| 2026-06-23 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Saleplanindirect | 76,464 | 13.11 | $1.00M | 7,050,125 | Form 4 |
| 2026-06-22 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Saleplanindirect | 70,536 | 13.21 | $931,781 | 7,126,589 | Form 4 |
| 2026-03-23 | Green Jay MichaelChief Financial Officer | Saleplan | 50,000 | 12.77 | $638,500 | 1,175,589 | Form 4 |
| 2025-12-08 | Meriwether Karen SueDirector | Buy | 542 | 14.67 | $7,951 | 9,752 | Form 4 |
| 2025-11-19 | Lee-Smith ChristopherDirector, Co-Founder, Head of Distrib. | Buy | 14,700 | 13.42 | $197,274 | 17,655,379 | Form 4 |
| 2025-11-19 | Gaynor SamuelDirector | Buy | 7,500 | 13.44 | $100,800 | 7,500 | Form 4 |
| 2025-11-18 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Buy | 38,000 | 13.34 | $506,920 | 7,235,125 | Form 4 |
| 2025-11-17 | Sternberg Matthew DavidCOO, Risk Exchange | Buy | 5,700 | 13.10 | $74,670 | 157,964 | Form 4 |
| 2025-11-14 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Buyindirect | 74,110 | 13.48 | $999,003 | 28,261,939 | Form 4 |
| 2025-07-25 | Hasley NancyDirector, General Counsel | Buyindirect | 500 | 21.00 | $10,500 | 500 | Form 4 |
| 2025-07-25 | Schwartz Keoni AndrewDirector, 10% ownerwith Acp Accelerant Holdings, L.P., Acp Insurance Management, LLC | Saleindirect | 8,111,253 | 21.00 | $170.34M | 0 | Form 4 |
| 2025-07-25 | Schwartz Keoni AndrewDirector, 10% ownerwith Acp Accelerant Holdings, L.P., Acp Insurance Management, LLC | Saleindirect | 2,670,456 | 21.00 | $56.08M | 0 | Form 4 |
| 2025-07-25 | Schwartz Keoni AndrewDirector, 10% ownerwith Acp Accelerant Holdings, L.P., Acp Insurance Management, LLC | Saleindirect | 488,131 | 21.00 | $10.25M | 0 | Form 4 |
| 2025-07-25 | Schwartz Keoni AndrewDirector, 10% ownerwith Acp Accelerant Holdings, L.P., Acp Insurance Management, LLC | Saleindirect | 326,312 | 21.00 | $6.85M | 0 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
15 × grant or award15 × conversion3 × shares withheld for tax
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-07-23 | Sternberg Matthew DavidCOO, Risk Exchange | Shares withheld for tax F | −3,910 | 13.77 | 614,050 | Form 4 |
| 2026-05-13 | Little Paul ChristopherDirector | Grant or award A | +11,658 | – | 20,868 | Form 4 |
| 2026-05-13 | Hasley NancyDirector | Grant or award A | +11,658 | – | 1,397,323 | Form 4 |
| 2026-05-13 | Meriwether Karen SueDirector | Grant or award A | +11,658 | – | 21,410 | Form 4 |
| 2026-05-13 | Talach David George PaulDirector | Grant or award A | +23,316 | – | 23,316 | Form 4 |
| 2026-05-13 | Wainwright SimonDirector | Grant or award A | +23,316 | – | 23,316 | Form 4 |
| 2026-05-13 | Sternberg Matthew DavidCOO, Risk Exchange | Grant or award A | +279,329 | – | 617,960 | Form 4 |
| 2026-03-18 | Sternberg Matthew DavidCOO, Risk Exchange | Grant or award A | +180,667 | – | 338,631 | Form 4 |
| 2026-03-18 | Lee-Smith ChristopherDirector, Co-Founder, Head of Distrib. | Grant or award A | +128,644 | – | 17,784,023 | Form 4 |
| 2026-03-18 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Grant or award A | +128,644 | – | 7,363,769 | Form 4 |
| 2026-03-18 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Grant or award A | +300,171 | – | 333,652 | Form 4 |
| 2026-03-17 | Green Jay MichaelChief Financial Officer | Shares withheld for tax F | −28,625 | 11.63 | 1,225,589 | Form 4 |
| 2026-02-02 | Green Jay MichaelChief Financial Officer | Shares withheld for tax F | −200,637 | 12.76 | 1,254,214 | Form 4 |
| 2025-07-25 | Green Jay MichaelChief Financial Officer | Grant or award A | +1,454,851 | – | 1,454,851 | Form 4 |
| 2025-07-25 | Harrington Wendy LiisaDirector | Grant or award A | +9,210 | – | 9,210 | Form 4 |
| 2025-07-25 | Harrington Wendy LiisaDirector | Conversion C | +7,808 | – | 17,018 | Form 4 |
| 2025-07-25 | Harrington Wendy LiisaDirector | Conversion C | +6,297 | – | 23,315 | Form 4 |
| 2025-07-25 | Hasley NancyDirector, General Counsel | Conversion C | +1,368,640 | – | 1,368,640 | Form 4 |
| 2025-07-25 | Hasley NancyDirector, General Counsel | Conversion C | +512,531 | – | 512,531 | Form 4 |
| 2025-07-25 | Hasley NancyDirector, General Counsel | Conversion C | +17,025 | – | 1,385,665 | Form 4 |
| 2025-07-25 | Lee-Smith ChristopherDirector, Co-Founder, Head of Distrib. | Conversion C | +17,509,884 | – | 17,509,884 | Form 4 |
| 2025-07-25 | Little Paul ChristopherDirector | Grant or award A | +9,210 | – | 9,210 | Form 4 |
| 2025-07-25 | Meriwether Karen SueDirector | Grant or award A | +9,210 | – | 9,210 | Form 4 |
| 2025-07-25 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Conversion C | +7,136,705 | – | 7,136,705 | Form 4 |
| 2025-07-25 | ONeill Francis JamesCo-Founder, Chief U/W Officer | Conversion C | +7,975 | – | 7,144,680 | Form 4 |
| 2025-07-25 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Conversion C | +33,464 | – | 33,464 | Form 4 |
| 2025-07-25 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Conversion C | +27,945,395 | – | 27,945,395 | Form 4 |
| 2025-07-25 | Radke Jeffrey LDirector, Co-Founder, CEO, 10% owner | Conversion C | +249,828 | – | 249,828 | Form 4 |
| 2025-07-25 | Schwartz Keoni AndrewDirector, 10% owner | Conversion C | +8,111,253 | – | 8,111,253 | Form 4 |
| 2025-07-25 | Schwartz Keoni AndrewDirector, 10% owner | Conversion C | +2,670,456 | – | 2,670,456 | Form 4 |
| 2025-07-25 | Schwartz Keoni AndrewDirector, 10% owner | Conversion C | +488,131 | – | 488,131 | Form 4 |
| 2025-07-25 | Schwartz Keoni AndrewDirector, 10% owner | Conversion C | +326,312 | – | 326,312 | Form 4 |
| 2025-07-25 | Sternberg Matthew DavidCOO, Risk Exchange | Grant or award A | +152,264 | – | 152,264 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.