Who Owns OCTAVE SPECIALTY GROUP INC (OSG)? -- Institutional Holders (2026-06-30)
181 institutions reported holding $200.3M of OCTAVE SPECIALTY GROUP INC (OSG) in SEC 13F filings for 2026-06-30. Largest institutional holders: BlackRock, Inc. ($28.5M), VANGUARD GROUP INC ($17.0M), Western Standard LLC ($14.0M), Prescott Group Capital Management, L.L.C. ($10.3M), THIRD AVENUE MANAGEMENT LLC ($8.4M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|
| 1 | BlackRock, Inc. | $28.5M | 4.6M | Added |
| 2 | VANGUARD GROUP INC | $17.0M | 2.7M | Added |
| 3 | Western Standard LLC | $14.0M | 2.2M | Hold |
| 4 | Prescott Group Capital Management, L.L.C. | $10.3M | 1.6M | Added |
| 5 | THIRD AVENUE MANAGEMENT LLC | $8.4M | 1.3M | Added |
| 6 | Bain Capital Credit, LP | $6.9M | 1.1M | Hold |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | $6.9M | 1.1M | Added |
| 8 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $6.8M | 1.1M | Added |
| 9 | Caption Management, LLC | $5.6M | 901,436 | Trimmed |
| 10 | STATE STREET CORP | $5.6M | 898,673 | Trimmed |
| 11 | DIMENSIONAL FUND ADVISORS LP | $4.5M | 716,947 | Trimmed |
| 12 | JACOBS LEVY EQUITY MANAGEMENT, INC | $4.1M | 649,530 | Trimmed |
| 13 | MARSHALL WACE, LLP | $3.8M | 601,796 | Trimmed |
| 14 | ZACKS INVESTMENT MANAGEMENT | $3.7M | 590,370 | New |
| 15 | Bracebridge Capital, LLC | $3.6M | 579,234 | Hold |
| 16 | MORGAN STANLEY | $3.6M | 569,563 | Added |
| 17 | GOLDMAN SACHS GROUP INC | $3.5M | 560,756 | Added |
| 18 | RIHO Partners, LLC | $3.5M | 554,818 | Added |
| 19 | ESSEX INVESTMENT MANAGEMENT CO LLC | $3.4M | 539,289 | Added |
| 20 | CITADEL ADVISORS LLC | $3.3M | 530,477 | Trimmed |
| 21 | GENDELL JEFFREY L | $3.1M | 494,092 | Trimmed |
| 22 | Wolf Hill Capital Management, LP | $3.0M | 480,187 | Trimmed |
| 23 | Nuveen, LLC | $2.7M | 428,165 | Trimmed |
| 24 | Sixth Street Partners Management Company, L.P. | $2.4M | 377,869 | New |
| 25 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $2.4M | 377,869 | Added |
Source: SEC Form 13F filings · as of 2026-06-30