| 4 | PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. | 1.6M | $10.3M | +3.5% | 3.658% | 0.89% |
| 5 | THIRD AVENUE MANAGEMENT LLC | 1.3M | $8.4M | +0.1% | 2.979% | 1.34% |
| 6 | Bain Capital Credit, LP | 1.1M | $6.9M | 0.0% | 2.459% | 1.88% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 1.1M | $6.9M | +8.2% | 2.456% | 0.00% |
| 8 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1.1M | $6.8M | +36.9% | 2.411% | 0.00% |
| 9 | Caption Management, LLC | 901K | $5.6M | -12.3% | 2.001% | 0.03% |
| 10 | STATE STREET CORP | 899K | $5.6M | -4.5% | 1.995% | 0.00% |
| 11 | DIMENSIONAL FUND ADVISORS LP | 717K | $4.5M | -45.3% | 1.591% | 0.00% |
| 12 | JACOBS LEVY EQUITY MANAGEMENT, INC | 650K | $4.1M | -26.6% | 1.442% | 0.01% |
| 13 | MARSHALL WACE, LLP | 602K | $3.8M | -43.5% | 1.336% | 0.00% |
| 14 | ZACKS INVESTMENT MANAGEMENT | 590K | $3.7M | — | 1.310% | 0.03% |
| 15 | Bracebridge Capital, LLC | 579K | $3.6M | 0.0% | 1.286% | 0.07% |
| 16 | MORGAN STANLEY | 570K | $3.6M | +142.1% | 1.264% | 0.00% |
| 17 | GOLDMAN SACHS GROUP INC | 561K | $3.5M | +61.9% | 1.245% | 0.00% |
| 18 | RIHO Partners, LLC | 555K | $3.5M | +1.5% | 1.232% | 1.95% |
| 19 | ESSEX INVESTMENT MANAGEMENT CO LLC | 539K | $3.4M | +28.9% | 1.197% | 0.44% |
| 20 | CITADEL ADVISORS LLC | 530K | $3.3M | -1.9% | 1.177% | 0.00% |
| 21 | GENDELL JEFFREY L | 494K | $3.1M | -65.0% | 1.097% | 0.03% |
| 22 | Wolf Hill Capital Management, LP | 480K | $3.0M | -67.3% | 1.066% | 0.25% |
| 23 | Nuveen, LLC | 428K | $2.7M | -46.5% | 0.950% | 0.00% |
| 24 | VANGUARD PORTFOLIO MANAGEMENT LLC | 392K | $2.4M | +32.6% | 0.871% | 0.00% |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 378K | $2.4M | +27.9% | 0.839% | 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 OSG — a direct measure of their conviction.
| $361M |
| 86% |
| Q4 2024 | 180 | +2.3% | — | — | $2.56B | +468% |
| Q3 2024 | 176 | — | — | — | $450M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
37 institutions opened new positions in OSG during Q2 2026, while 34 fully exited. 79 added to existing positions and 28 trimmed.
Quarter-over-quarter ownership change for OSG is not yet available — at least two quarters of 13F data are required.
The top 10 institutions account for 53.7% of all reported 13F value in OSG, and the top 25 account for 79.3%.
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.
Octave Specialty Group, Inc. (OSG) Institutional Ownership