Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ARX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | SECURITY BENEFIT LIFE INSURANCE CO /KS/ | 5.9M | $78.4M | 0.0% | 2.688% | 41.18% |
| 2 | Capital World Investors | 5.2M | $68.8M | -10.7% | 2.361% | 0.01% |
| 3 | Keenan Capital, LLC | 4.0M | $53.3M | +27.2% | 1.830% | 11.26% |
| 4 | GILDER GAGNON HOWE & CO LLC | 3.7M | $50.0M | +1.1% | 1.716% | 0.60% |
| 5 | BARINGS LLC | 3.1M | $46.1M | 0.0% | 1.434% | 0.74% |
| 6 | ALLIANCEBERNSTEIN L.P. | 2.8M | $45.8M | -1.6% | 1.283% | 0.01% |
| 7 | AMERICAN CENTURY COMPANIES INC | 3.2M | $42.6M | +108.6% | 1.461% | 0.02% |
| 8 | MARSHALL WACE, LLP | 2.3M | $30.4M | +553.2% | 1.042% | 0.03% |
| 9 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2.1M | $28.2M | β | 0.969% | 0.00% |
| 10 | Azora Capital LP | 2.0M | $26.5M | -18.8% | 0.907% | 1.74% |
| 11 | VANGUARD CAPITAL MANAGEMENT LLC | 1.9M | $25.9M | β | 0.889% | 0.00% |
| 12 | Cresset Asset Management, LLC | 1.8M | $24.6M | β | 0.843% | 0.12% |
| 13 | FMR LLC | 1.8M | $24.2M | +1.4% | 0.831% | 0.00% |
| 14 | ArrowMark Colorado Holdings LLC | 1.5M | $20.7M | -5.8% | 0.710% | 0.55% |
| 15 | BAMCO INC /NY/ | 1.2M | $16.1M | -0.0% | 0.554% | 0.05% |
| 16 | CITADEL ADVISORS LLC | 1.2M | $15.7M | +55.9% | 0.540% | 0.01% |
| 17 | Qube Research & Technologies Ltd | 931K | $12.4M | β | 0.427% | 0.01% |
| 18 | JANE STREET GROUP, LLC | 861K | $11.5M | β | 0.394% | 0.10% |
| 19 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 708K | $9.5M | β | 0.325% | 0.00% |
| 20 | UBS Group AG | 686K | $9.2M | +28.0% | 0.314% | 0.00% |
| 21 | G2 Investment Partners Management LLC | 373K | $5.0M | +299.4% | 0.171% | 1.23% |
| 22 | Woodline Partners LP | 367K | $4.9M | +86.1% | 0.168% | 0.02% |
| 23 | BNP PARIBAS ARBITRAGE, SA | 305K | $4.1M | +753.2% | 0.140% | 0.00% |
| 24 | MORGAN STANLEY | 287K | $3.8M | +165.3% | 0.132% | 0.00% |
| 25 | RENAISSANCE TECHNOLOGIES LLC | 277K | $3.7M | +280.5% | 0.127% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in ARX β a direct measure of their conviction.
Filings activity in ARX during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new ARX position in Q1 2026
Institutions that fully closed their ARX position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 107 | +8.1% | 25.16% | 3.88 pp | $715M | 13% |
| Q4 2025 | 99 | +10% | 29.04% | +3.60 pp | $826M | +14% |
| Q3 2025 | 90 | +8900% | 25.44% | +25.44 pp | $723M | +6576087936% |
| Q2 2025 | 1 | +0.0% | 0.00% | +0.00 pp | $0M | +0.0% |
| Q1 2025 | 1 | +0.0% | 0.00% | +0.00 pp | $0M | +0.0% |
| Q4 2024 | 1 | +0.0% | 0.00% | +0.00 pp | $0M | +0.0% |
| Q3 2024 | 1 | +0.0% | 0.00% | +0.00 pp | $0M | +0.0% |
| Q2 2024 | 1 | β | 0.00% | β | $0M | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ARX stock.
Based on Q1 2026 13F filings, institutional ownership of Accelerant Holdings stands at 25.2%, held across 107 reporting institutions.
SECURITY BENEFIT LIFE INSURANCE CO /KS/ is the largest reported institutional holder of ARX, with approximately 5,866,257 shares worth $0.08B as of Q1 2026.
Yes β 4 widely-followed marquee investors appear among the top 25 institutional holders of ARX, including CITADEL ADVISORS LLC, JANE STREET GROUP, LLC, SUSQUEHANNA INTERNATIONAL GROUP, LLP, RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for ARX is 53 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
33 institutions opened new positions in ARX during Q1 2026, while 25 fully exited. 31 added to existing positions and 42 trimmed.
ARX institutional ownership fell by 3.88 percentage points quarter-over-quarter, with a net change of +8 holders.
The top 10 institutions account for 65.7% of all reported 13F value in ARX, and the top 25 account for 92.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Accelerant Holdings (ARX) Institutional Ownership