As of September 29, 2026, the three largest insider holders of ARX are Jeffrey L Radke (Co Founder, Ceo, 27.59Mn shares), Christopher Lee-Smith (Co Founder, Head Of Distrib., 17.78Mn shares), Francis James Oneill (Co Founder, Chief U/W Officer, 7.36Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Jeffrey L Radke | Co Founder, Ceo | 0 | 27,591,939 | 27,591,939 | 50.2% | 11 Aug, 2026 |
| 2 | Christopher Lee-Smith | Co Founder, Head Of Distrib. | 17,784,023 | 0 | 17,784,023 | 32.3% | 20 Mar, 2026 |
| 3 | Francis James Oneill | Co Founder, Chief U/W Officer | 0 | 6,369,290 | 6,369,290 | 11.6% | 12 Aug, 2026 |
| 4 | Nancy Hasley | General Counsel | 1,341,834 | 0 | 1,341,834 | 2.4% | 14 Aug, 2026 |
| 5 | Jay Michael Green | Chief Financial Officer | 1,175,589 | 0 | 1,175,589 | 2.1% | 24 Mar, 2026 |
| 6 | Matthew David Sternberg | Coo, Risk Exchange | 596,482 | 0 | 596,482 | 1.1% | 27 Jul, 2026 |
| 7 | David George Paul Talach | Director | 23,316 | 0 | 23,316 | 0.0% | 15 May, 2026 |
| 8 | Simon Wainwright | Director | 23,316 | 0 | 23,316 | 0.0% | 15 May, 2026 |
| 9 | Wendy Liisa Harrington | Director | 23,315 | 0 | 23,315 | 0.0% | 29 Jul, 2025 |
| 10 | Paul Christopher Little | Director | 20,868 | 0 | 20,868 | 0.0% | 15 May, 2026 |
| 11 | Karen Sue Meriwether | Director | 20,868 | 0 | 20,868 | 0.0% | 25 Aug, 2026 |
| 12 | Samuel Gaynor | Director | 7,500 | 0 | 7,500 | 0.0% | 20 Nov, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 21 Aug, 2026 | Karen Sue Meriwether | Director | Disposed S | 542 | $19.62 | $10.63K | 20,868 | Direct |
| 13 Aug, 2026 | Nancy Hasley | Director | Disposed S | 20,489 | $19.56 | $400.84K | 1,341,834 | Direct |
| 10 Aug, 2026 | Francis James Oneill | Co Founder, Chief U/W Officer | Disposed S | 63,616 | $12.07 | $767.67K | 6,458,509 | Indirect |
| 11 Aug, 2026 | Francis James Oneill | Co Founder, Chief U/W Officer | Disposed S | 89,219 | $12.41 | $1.11Mn | 6,369,290 | Indirect |
| 10 Aug, 2026 | Jeffrey L Radke | Co Founder, Ceo | Disposed S | 80,000 | $12.09 | $967.10K | 27,591,939 | Indirect |
| 03 Aug, 2026 | Jeffrey L Radke | Co Founder, Ceo | Disposed S | 80,000 | $12.06 | $964.53K | 27,671,939 | Indirect |
| 27 Jul, 2026 | Francis James Oneill | Co Founder, Chief U/W Officer | Disposed S | 110,467 | $14.63 | $1.62Mn | 6,626,772 | Indirect |
| 28 Jul, 2026 | Francis James Oneill | Co Founder, Chief U/W Officer | Disposed S | 104,647 | $14.56 | $1.52Mn | 6,522,125 | Indirect |
| 27 Jul, 2026 | Jeffrey L Radke | Co Founder, Ceo | Disposed S | 80,000 | $14.63 | $1.17Mn | 27,767,162 | Indirect |
| 27 Jul, 2026 | Jeffrey L Radke | Co Founder, Ceo | Disposed S | 15,223 | $14.45 | $220.01K | 27,751,939 | Indirect |
| 23 Jul, 2026 | Matthew David Sternberg | Coo, Risk Exchange | Disposed F | 3,910 | $13.77 | $53.84K | 614,050 | Direct |
| 27 Jul, 2026 | Matthew David Sternberg | Coo, Risk Exchange | Disposed S | 17,568 | $14.64 | $257.21K | 596,482 | Direct |
| 17 Jul, 2026 | Jeffrey L Radke | Co Founder, Ceo | Disposed S | 14,777 | $14.30 | $211.28K | 27,927,162 | Indirect |
| 20 Jul, 2026 | Jeffrey L Radke | Co Founder, Ceo | Disposed S | 80,000 | $13.51 | $1.08Mn | 27,847,162 | Indirect |
| 14 Jul, 2026 | Francis James Oneill | Co Founder, Chief U/W Officer | Disposed S | 83,119 | $12.84 | $1.07Mn | 6,820,006 | Indirect |
| 15 Jul, 2026 | Francis James Oneill | Co Founder, Chief U/W Officer | Disposed S | 82,767 | $12.71 | $1.05Mn | 6,737,239 | Indirect |
| 13 Jul, 2026 | Jeffrey L Radke | Co Founder, Ceo | Disposed S | 80,000 | $13.18 | $1.05Mn | 27,941,939 | Indirect |
| 06 Jul, 2026 | Jeffrey L Radke | Co Founder, Ceo | Disposed S | 80,000 | $13.33 | $1.07Mn | 28,021,939 | Indirect |
| 29 Jun, 2026 | Jeffrey L Radke | Co Founder, Ceo | Disposed S | 80,000 | $12.87 | $1.03Mn | 28,101,939 | Indirect |
| 25 Jun, 2026 | Francis James Oneill | Co Founder, Chief U/W Officer | Disposed S | 73,500 | $13.06 | $959.78K | 6,976,625 | Indirect |