Accelerant Holdings (ARX) Ownership
ARX ownership summary
as of October 18, 2026- Institutions
- 60.8% of shares outstanding
- Insiders
- 48.74% of shares outstanding
- Shares outstanding
- 118.5M
- Float
- 56.8M shares available to trade
- Short interest
- 7.24% 4.5M shares short
- Days to cover
- 2.31 short interest down 13.1% vs prior month
- Institutions 60.76%
- Insiders 48.74%
ARX top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Security Benefit Life Insurance Co | 2.70% | 5.9M | $115.9M | — | June 30, 2026 |
| 2 | FMR Inc | 2.59% | 5.6M | $111.2M | +3.8M (+210.6%) | June 30, 2026 |
| 3 | Capital World Investors | 2.13% | 4.6M | $91.4M | −526,077 (−10.2%) | June 30, 2026 |
| 4 | Keenan Capital LLC | 1.84% | 4.0M | $78.9M | — | June 30, 2026 |
| 5 | American Century Companies Inc | 1.79% | 3.9M | $76.6M | +689,114 (+21.6%) | June 30, 2026 |
| 6 | Gilder Gagnon Howe & CO LLC | 1.72% | 3.7M | $73.7M | −11,340 (−0.3%) | June 30, 2026 |
| 7 | BlackRock Inc | 1.61% | 3.5M | $69.1M | +3.3M (+2,011.7%) | June 30, 2026 |
| 8 | Barings LLC | 1.44% | 3.1M | $61.8M | — | June 30, 2026 |
| 9 | Azora Capital LP | 1.40% | 3.0M | $60.2M | +1.1M (+54.0%) | June 30, 2026 |
| 10 | Vanguard Portfolio Management, LLC | 1.11% | 2.4M | $47.8M | +304,765 (+14.4%) | June 30, 2026 |
| 11 | JPMorgan Chase & Co | 1.00% | 2.2M | $43.0M | +156,439 (+7.7%) | June 30, 2026 |
| 12 | The Goldman Sachs Group Inc | 0.93% | 2.0M | $39.8M | +2.0M (+4,732.3%) | June 30, 2026 |
| 13 | Cresset Asset Management, LLC | 0.85% | 1.8M | $36.3M | — | June 30, 2026 |
| 14 | Citadel Advisors Llc | 0.80% | 1.7M | $34.5M | +603,779 (+52.8%) | June 30, 2026 |
| 15 | Vanguard Capital Management, LLC | 0.76% | 1.7M | $32.7M | −281,741 (−14.5%) | June 30, 2026 |
| 16 | AllianceBernstein L.P. | 0.67% | 1.4M | $28.6M | −1.4M (−48.3%) | June 30, 2026 |
| 17 | Owls Nest Partners IA, LLC | 0.58% | 1.3M | $24.7M | +1.0M (+497.0%) | June 30, 2026 |
| 18 | Marshall Wace Asset Management Ltd | 0.51% | 1.1M | $21.9M | −1.2M (−51.2%) | June 30, 2026 |
| 19 | Jane Street Group LLC | 0.44% | 952K | $18.8M | +91,369 (+10.6%) | June 30, 2026 |
| 20 | State Street Corp | 0.41% | 901K | $17.8M | +863,469 (+2,314.6%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 11 holders added 13.9M shares and 5 cut 3.3M.
ARX top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | American Funds SMALLCAP World A | 2.04% | 4.4M | $87.4M | −611,541 (−12.1%) | June 30, 2026 |
| 2 | American Century Small Cap Value Inv | 0.97% | 2.1M | $41.6M | +285,000 (+15.7%) | June 30, 2026 |
| 3 | Fidelity Small Cap Growth | 0.81% | 1.8M | $34.8M | — | July 31, 2026 |
| 4 | Vanguard MStar Total Stk Mkt Idx Invest | 0.74% | 1.6M | $31.6M | — | August 31, 2026 |
| 5 | iShares Russell 2000 ETF | 0.70% | 1.5M | $30.1M | −17,536 (−1.1%) | September 30, 2026 |
| 6 | Fidelity SAI Merger Arbitrage | 0.59% | 1.3M | $25.4M | +1.3M (0.0%) | August 31, 2026 |
| 7 | Vanguard Small Cap Index | 0.54% | 1.2M | $23.1M | +1,748 (+0.1%) | August 31, 2026 |
| 8 | Fidelity Stock Selector Small Cap | 0.53% | 1.2M | $22.9M | +22,000 (+1.9%) | July 31, 2026 |
| 9 | Fidelity Small Cap Growth K6 | 0.41% | 900K | $17.8M | — | July 31, 2026 |
| 10 | Arbitrage R | 0.41% | 890K | $17.6M | +890,012 (0.0%) | August 31, 2026 |
| 11 | Fidelity Advisor Small Cap I | 0.37% | 798K | $15.8M | +7,100 (+0.9%) | July 31, 2026 |
| 12 | Vanguard MStar Small Cap Value Index | 0.34% | 742K | $14.6M | +159 (+0.0%) | August 31, 2026 |
| 13 | Fidelity Series Small Cap Opps | 0.33% | 710K | $14.0M | — | July 31, 2026 |
| 14 | Fidelity Small Cap Index | 0.31% | 667K | $13.2M | +5,357 (+0.8%) | July 31, 2026 |
| 15 | iShares Russell 2000 Growth ETF | 0.23% | 510K | $10.1M | −646 (−0.1%) | September 30, 2026 |
| 16 | Federated Hermes Kaufmann Small Cap A | 0.18% | 400K | $7.9M | — | June 30, 2026 |
| 17 | Driehaus Small Cap Growth Institutional | 0.17% | 372K | $7.3M | +372,149 (0.0%) | July 31, 2026 |
| 18 | Vanguard Russell 2000 ETF | 0.16% | 351K | $6.9M | +8,289 (+2.4%) | August 31, 2026 |
| 19 | AB Merger Arbitrage S1 USD | 0.15% | 316K | $6.2M | +315,950 (0.0%) | August 31, 2026 |
| 20 | Meridian Growth Legacy | 0.10% | 219K | $4.3M | −51,951 (−19.2%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ARX insider transactions
latest 7| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-23 | Jay Michael Green | Sell | $12.77 | 50,000 | $638,500 |
| 2025-11-19 | Christopher Lee-Smith | Buy | $13.42 | 14,700 | $197,274 |
| 2025-11-19 | Samuel Gaynor | Buy | $13.44 | 7,500 | $100,800 |
| 2025-11-18 | Francis James Oneill | Buy | $13.34 | 38,000 | $506,920 |
| 2025-11-14 | Jeffrey L Radke | Buy | $13.48 | 74,110 | $999,003 |
| 2025-07-25 | Keoni Andrew Schwartz | Sell | $21.00 | 11,596,152 | $243.5M |
| 2025-07-25 | Nancy Hasley | Buy | $21.00 | 500 | $10,500 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ARX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ARX
Institutional investors own 60.8% of Accelerant's shares and insiders 48.74%. The largest holder is Security Benefit Life Insurance Co with 2.70% of the shares (5.9M), as of June 30, 2026. Among the top 20 institutions, 11 added shares and 5 reduced their stake in the latest filings. Short interest is 7.24% of the float, or 2.31 days of average trading volume. The share count rose 16.1% since 2023.
Related: ARX analyst forecast, ARX key metrics. See the ARX stock overview for the latest quote and news.
ARX ownership FAQ
Who owns the most Accelerant stock?
The largest shareholders of Accelerant are Security Benefit Life Insurance Co (2.70%), FMR Inc (2.59%), Capital World Investors (2.13%), Keenan Capital LLC (1.84%), American Century Companies Inc (1.79%).
What percentage of Accelerant is owned by institutions?
Institutions hold 60.8% of Accelerant's shares outstanding; insiders hold 48.74%.
Which funds own Accelerant?
The largest fund holders of Accelerant are American Funds SMALLCAP World A (2.04%), American Century Small Cap Value Inv (0.97%), Fidelity Small Cap Growth (0.81%), Vanguard MStar Total Stk Mkt Idx Invest (0.74%), iShares Russell 2000 ETF (0.70%).
What is Accelerant's short interest?
4.5M shares of Accelerant were sold short, 7.24% of the float; at the average daily volume it would take 2.31 days to cover.
Are insiders buying or selling Accelerant?
Of the latest 7 reported insider transactions in Accelerant (since July 25, 2025), 5 were purchases and 2 were sales.
How many shares of Accelerant are outstanding?
Accelerant has 118.5M shares outstanding, of which 56.8M are in the public float.