Octave Specialty Group, Inc. (OSG) Ownership & Trading Activity
Institutional holders, insider transactions, and congressional trades for OSG. 13F holdings as of 2026-06-30.
In 13F filings for the quarter ended June 30, 2026, 144 institutions reported holding OSG, with 30.1 million shares worth $187.6 million in aggregate.
Top Institutional Holders
| Institution | Shares | Value | Change |
|---|---|---|---|
| BlackRock | 4,572,516 | $29M | INCREASED |
| Vanguard | 2,723,930 | $17M | INCREASED |
| Western Standard | 2,247,591 | $14M | UNCHANGED |
| Prescott Group Capital Management, | 1,647,793 | $10M | INCREASED |
| Third Avenue Management | 1,341,879 | $8M | INCREASED |
Full institutional holdings, insider history, and congressional trades for Octave Specialty Group, Inc. on SentiSense.