Octave Specialty Group, Inc. (OSG) ownership: Western Standard, LLC 13% · institutions 69% · index and ETF funds 7% (13F 2026-03-31). Insider activity, 90 days: 0 sales, 0 open-market buys. SEC EDGAR first-party data.
| Holder | Shares | Market Value | % Outstanding | Reported |
|---|---|---|---|---|
| BlackRock | 3917798.00 | $18.22M | 8.7% | 2026-03-31 |
| Vanguard | 2534189.00 | $11.78M | 5.6% | 2026-03-31 |
| Western Standard LLC | 2247591.00 | $10.45M | 5.0% | 2026-03-31 |
| Prescott Group Capital Management, L.L.C. | 1592587.00 | $7.41M | 3.5% | 2026-03-31 |
| Wolf Hill Capital Management, LP | 1470334.00 | $6.84M | 3.3% | 2026-03-31 |
| Gendell Jeffrey L | 1413212.00 | $6.57M | 3.1% | 2026-03-31 |
| Third Avenue Management LLC | 1341211.00 | $6.24M | 3.0% | 2026-03-31 |
| Dimensional Fund Advisors | 1310132.00 | $6.09M | 2.9% | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-07-09 | |
| Sell | null | 2026-07-09 | |
| Sell | null | 2026-07-09 | |
| Sell | null | 2026-07-09 | |
| Sell | null | 2026-07-09 | |
| Sell | null | 2026-07-09 | |
| Sell | null | 2026-07-09 | |
| Sell | null | 2026-07-09 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.