Accelerant Holdings
Ownership
Ownership Structure
Who owns Accelerant Holdings (ARX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 47.9% of the shares are freely tradable; institutional investors hold 60.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Security Benefit Life Insurance Co | 2.70 | 5,866,257 | +0.0 | 06/30/2026 |
| Capital World Investors | 2.13 | 4,626,664 | -10.2 | 06/30/2026 |
| Keenan Capital LLC | 1.84 | 3,992,923 | +0.0 | 06/30/2026 |
| American Century Companies Inc | 1.79 | 3,877,619 | +21.6 | 06/30/2026 |
| Gilder Gagnon Howe & CO LLC | 1.72 | 3,743,364 | +1.1 | 03/31/2026 |
| Barings LLC | 1.44 | 3,128,867 | +0.0 | 06/30/2026 |
| Azora Capital LP | 1.40 | 3,049,846 | +54.0 | 06/30/2026 |
| AllianceBernstein L.P. | 1.29 | 2,800,188 | -1.6 | 03/31/2026 |
| Marshall Wace Asset Management Ltd | 1.05 | 2,274,152 | +553.2 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| American Funds SMALLCAP World A | 2.04 | 4,426,553 | -12.1 | 06/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| ONeill Francis James | Co-Founder, Chief U/W Officer | 6,369,290 | 126,111,942 $ | Aug 11, 2026 | indirect |
| Hasley Nancy | Director | 1,341,834 | 26,568,313 $ | Aug 13, 2026 | direct |
| Meriwether Karen Sue | Director | 20,868 | 413,186 $ | Aug 21, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 21, 2026 | Meriwether Karen Sue | Director | Sell | 542 | 19.62 | 10,631 |
| Aug 13, 2026 | Hasley Nancy | Director | Sell | 20,489 | 19.56 | 400,839 |
| Aug 11, 2026 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 89,219 | 12.41 | 1,107,217 |
| Aug 10, 2026 | ONeill Francis James | Co-Founder, Chief U/W Officer | Sell | 63,616 | 12.07 | 767,667 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 25, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.