Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in OBA held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Magnetar Financial LLC | 1.3M | $12.7M | 0.0% | 4.941% | 0.13% |
| 2 | D. E. Shaw & Co., Inc. | 1.2M | $12.6M | 0.0% | 4.923% | 0.01% |
| 3 | Westchester Capital Management, LLC | 1.1M | $11.3M | +21.8% | 4.418% | 0.54% |
| 4 | PICTON MAHONEY ASSET MANAGEMENT | 1.0M | $10.1M | 0.0% | 3.953% | 0.10% |
| 5 | Karpus Management, Inc. | 862K | $8.7M | — | 3.407% | 0.27% |
| 6 | WOLVERINE ASSET MANAGEMENT LLC | 825K | $8.4M | +0.3% | 3.259% | 0.14% |
| 7 | CNH PARTNERS LLC | 806K | $8.2M | -3.7% | 3.185% | 0.13% |
| 8 | MMCAP International Inc. SPC | 750K | $7.6M | 0.0% | 2.964% | 0.66% |
| 9 | TWO SIGMA INVESTMENTS, LP | 691K | $7.0M | 0.0% | 2.733% | 0.01% |
| 10 | ARISTEIA CAPITAL LLC | 650K | $6.6M | +30.0% | 2.569% | 0.15% |
| 11 | Radcliffe Capital Management, L.P. | 625K | $6.3M | 0.0% | 2.472% | 0.48% |
| 12 | TIG Advisors, LLC | 602K | $6.1M | 0.0% | 2.378% | 0.31% |
| 13 | TENOR CAPITAL MANAGEMENT Co., L.P. | 600K | $6.1M | 0.0% | 2.372% | 0.09% |
| 14 | Logan Stone Capital, LLC | 502K | $5.1M | 0.0% | 1.986% | 1.42% |
| 15 | Polar Asset Management Partners Inc. | 500K | $5.1M | 0.0% | 1.976% | 0.11% |
| 16 | Hudson Bay Capital Management LP | 500K | $5.1M | 0.0% | 1.976% | 0.05% |
| 17 | LINDEN ADVISORS LP | 500K | $5.1M | 0.0% | 1.976% | 0.03% |
| 18 | Jain Global LLC | 500K | $5.1M | 0.0% | 1.976% | 0.02% |
| 19 | Ghisallo Capital Management LLC | 500K | $5.1M | 0.0% | 1.976% | 0.14% |
| 20 | Verition Fund Management LLC | 499K | $5.1M | -16.7% | 1.974% | 0.04% |
| 21 | Wealthspring Capital LLC | 452K | $4.6M | -3.3% | 1.787% | 1.09% |
| 22 | OMERS ADMINISTRATION Corp | 440K | $4.5M | 0.0% | 1.739% | 0.03% |
| 23 | Shaolin Capital Management LLC | 437K | $4.4M | +34.5% | 1.728% | 0.18% |
| 24 | BERKLEY W R CORP | 425K | $4.3M | 0.0% | 1.679% | 0.23% |
| 25 | MILLENNIUM MANAGEMENT LLC | 400K | $4.1M | 0.0% | 1.581% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in OBA — a direct measure of their conviction.
Filings activity in OBA during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new OBA position in Q1 2026
3 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 65 | +12% | 81.83% | +5.60 pp | $212M | +7.3% |
| Q4 2025 | 58 | +38% | 76.23% | +24.23 pp | $197M | +47% |
| Q3 2025 | 42 | — | 52.00% | — | $134M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying OBA stock.
Based on Q1 2026 13F filings, institutional ownership of Oxley Bridge Acquisition Limited stands at 81.8%, held across 65 reporting institutions.
Magnetar Financial LLC is the largest reported institutional holder of OBA, with approximately 1,250,000 shares worth $0.01B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of OBA, including TWO SIGMA INVESTMENTS, LP, MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for OBA is 77 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
8 institutions opened new positions in OBA during Q1 2026, while 1 fully exited. 48 added to existing positions and 9 trimmed.
OBA institutional ownership rose by 5.60 percentage points quarter-over-quarter, with a net change of +7 holders.
The top 10 institutions account for 44.0% of all reported 13F value in OBA, and the top 25 account for 79.9%.
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.
Oxley Bridge Acquisition Limited (OBA) Institutional Ownership