Accelerant Holdings (ARX) Insider Trading
Over the last 3 months, ARX insiders made 0 open-market buys and 18 sales, a net sale of -$16.7M (SEC Form 4). Over the last 6 months, 58 institutions increased and 49 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
18
Net (3m)
-$16.7M
Insider trades by month Buys Sells
Nov
Dec
Mar
Jun
Jul
Aug
Context3-month price -9.6%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 4, 2026 | RADKE JEFFREY Ldirector, 10 percent owner, officer: Co-Founder, CEO | Sell | 80,000 | $12.06 |
| Jul 29, 2026 | ONeill Francis Jamesofficer: Co-Founder, Chief U/W Officer | Sell | 110,467 | $14.63 |
| Jul 29, 2026 | ONeill Francis Jamesofficer: Co-Founder, Chief U/W Officer | Sell | 104,647 | $14.56 |
| Jul 28, 2026 | RADKE JEFFREY Ldirector, 10 percent owner, officer: Co-Founder, CEO | Sell | 80,000 | $14.63 |
| Jul 28, 2026 | RADKE JEFFREY Ldirector, 10 percent owner, officer: Co-Founder, CEO | Sell | 15,223 | $14.45 |
| Jul 27, 2026 | Sternberg Matthew Davidofficer: COO, Risk Exchange | Sell | 17,568 | $14.64 |
| Jul 27, 2026 | Sternberg Matthew Davidofficer: COO, Risk Exchange | Tax | 3,910 | $13.77 |
| Jul 20, 2026 | RADKE JEFFREY Ldirector, 10 percent owner, officer: Co-Founder, CEO | Sell | 14,777 | $14.30 |
| Jul 20, 2026 | RADKE JEFFREY Ldirector, 10 percent owner, officer: Co-Founder, CEO | Sell | 80,000 | $13.51 |
| Jul 16, 2026 | ONeill Francis Jamesofficer: Co-Founder, Chief U/W Officer | Sell | 83,119 | $12.84 |
| Jul 16, 2026 | ONeill Francis Jamesofficer: Co-Founder, Chief U/W Officer | Sell | 82,767 | $12.71 |
| Jul 14, 2026 | RADKE JEFFREY Ldirector, 10 percent owner, officer: Co-Founder, CEO | Sell | 80,000 | $13.18 |
| Jul 7, 2026 | RADKE JEFFREY Ldirector, 10 percent owner, officer: Co-Founder, CEO | Sell | 80,000 | $13.33 |
| Jun 30, 2026 | RADKE JEFFREY Ldirector, 10 percent owner, officer: Co-Founder, CEO | Sell | 80,000 | $12.87 |
| Jun 29, 2026 | ONeill Francis Jamesofficer: Co-Founder, Chief U/W Officer | Sell | 73,500 | $13.06 |
| Jun 25, 2026 | RADKE JEFFREY Ldirector, 10 percent owner, officer: Co-Founder, CEO | Sell | 80,000 | $13.11 |
| Jun 25, 2026 | Hasley Nancydirector | Sell | 35,000 | $13.11 |
| Jun 24, 2026 | ONeill Francis Jamesofficer: Co-Founder, Chief U/W Officer | Sell | 76,464 | $13.11 |
| Jun 24, 2026 | ONeill Francis Jamesofficer: Co-Founder, Chief U/W Officer | Sell | 70,536 | $13.21 |
| May 15, 2026 | Wainwright Simondirector | Grant | 23,316 | — |
| May 15, 2026 | Little Paul Christopherdirector | Grant | 11,658 | — |
| May 15, 2026 | Hasley Nancydirector | Grant | 11,658 | — |
| May 15, 2026 | Meriwether Karen Suedirector | Grant | 11,658 | — |
| May 15, 2026 | Talach David George Pauldirector | Grant | 23,316 | — |
| May 15, 2026 | Sternberg Matthew Davidofficer: COO, Risk Exchange | Grant | 279,329 | — |
| Mar 24, 2026 | Green Jay Michaelofficer: Chief Financial Officer | Sell | 50,000 | $12.77 |
| Mar 20, 2026 | Sternberg Matthew Davidofficer: COO, Risk Exchange | Grant | 180,667 | — |
| Mar 20, 2026 | RADKE JEFFREY Ldirector, 10 percent owner, officer: Co-Founder, CEO | Grant | 300,171 | — |
| Mar 20, 2026 | ONeill Francis Jamesofficer: Co-Founder, Chief U/W Officer | Grant | 128,644 | — |
| Mar 20, 2026 | Lee-Smith Christopherdirector, officer: Co-Founder, Head of Distrib. | Grant | 128,644 | — |
Source: ARX SEC Form 4 filings, latest Aug 4, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their ARX positions over the last 6 months (SEC Form 13F).
Increased
58
New positions
64
Reduced
49
Sold out
56
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| SECURITY BENEFIT LIFE INSURANCE CO /KS/ | Unchanged | 5.9M | May 4, 2026 |
| SECURITY BENEFIT LIFE INSURANCE CO /KS/ | Unchanged | 5.9M | Feb 3, 2026 |
| CAPITAL WORLD INVESTORS | Increased | 5.8M | Feb 11, 2026 |
| CAPITAL WORLD INVESTORS | Reduced | 5.2M | May 13, 2026 |
| KEENAN CAPITAL, LLC | Increased | 4.0M | May 15, 2026 |
| GILDER GAGNON HOWE & CO LLC | Increased | 3.7M | May 15, 2026 |
| GILDER GAGNON HOWE & CO LLC | Reduced | 3.7M | Feb 17, 2026 |
| AMERICAN CENTURY COMPANIES INC | Increased | 3.2M | May 15, 2026 |
| KEENAN CAPITAL, LLC | New Position | 3.1M | Feb 13, 2026 |
| BARINGS LLC | Unchanged | 3.1M | May 6, 2026 |
| BARINGS LLC | Unchanged | 3.1M | Feb 12, 2026 |
| ALLIANCEBERNSTEIN L.P. | Increased | 2.8M | Feb 17, 2026 |
| ALLIANCEBERNSTEIN L.P. | Reduced | 2.8M | May 15, 2026 |
| BALYASNY ASSET MANAGEMENT L.P. | Increased | 2.7M | Feb 17, 2026 |
| AZORA CAPITAL LP | Increased | 2.4M | Feb 17, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.