Updated Jul 16, 2026 · Last SEC filing 2026-07-14
Accelerant Holdings (ARX) has filed 13 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-14. 3 Form 8-K material event filings were reported by ARX in the last 90 days. 9 Form 144 notices of proposed sale were filed for ARX stock. InsiderAlpha tracks every ARX SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SEC CIK | 0001997350 |
|---|
| Form 4 filings (90d) | 13 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Form 144 notices (90d) | 9 |
| Latest Form 4 filing | 2026-07-14 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| RADKE JEFFREY L | Co-Founder, CEO | S — Open-market sale [10b5-1] | 80.0K | $13.18 | $1.05M | SEC | |
| RADKE JEFFREY L | Co-Founder, CEO | S — Open-market sale | 80.0K | $13.33 | $1.07M | SEC | |
| RADKE JEFFREY L | Co-Founder, CEO | S — Open-market sale | 80.0K | $12.87 | $1.03M | SEC | |
| ONeill Francis James | Co-Founder, Chief U/W Officer | S — Open-market sale | 73.5K | $13.18 | $969K | SEC | |
| ONeill Francis James | Co-Founder, Chief U/W Officer | S — Open-market sale | 73.5K | $13.06 | $960K | SEC | |
| Hasley Nancy | Director | S — Open-market sale | 35.0K | $13.11 | $459K | SEC | |
| ONeill Francis James | Co-Founder, Chief U/W Officer | S — Open-market sale | 76.5K | $13.11 | $1.00M | SEC | |
| RADKE JEFFREY L | Co-Founder, CEO | S — Open-market sale | 80.0K | $13.11 | $1.05M | SEC | |
| ONeill Francis James | Co-Founder, Chief U/W Officer | S — Open-market sale | 70.5K | $13.21 | $932K | SEC | |
| Wainwright Simon | Director | A — Grant or award | 23.3K | $0.00 | — | SEC | |
| Little Paul Christopher | Director | A — Grant or award | 11.7K | $0.00 | — | SEC | |
| Hasley Nancy | Director | A — Grant or award | 11.7K | $0.00 | — | SEC | |
| Meriwether Karen Sue | Director | A — Grant or award | 11.7K | $0.00 | — | SEC | |
| Talach David George Paul | Director | A — Grant or award | 23.3K | $0.00 | — | SEC | |
| Sternberg Matthew David | COO, Risk Exchange | A — Grant or award | 279.3K | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for Accelerant Holdings (ARX). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| RADKE JEFFREY L | 4 | $4.20M |
| ONeill Francis James | 4 | $3.86M |
| Hasley Nancy | 2 | $459K |
| Little Paul Christopher | 1 | — |
| Meriwether Karen Sue | 1 | — |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in ARX insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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