Octave Specialty Group, Inc. (OSG)
Who owns Octave Specialty Group, Inc. (OSG)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 94.3% of the shares are freely tradable; institutional investors hold 74.6%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.70 | 3,917,798 | -12.7 | 03/31/2026 |
| Vanguard Group Inc | 5.57 | 2,508,395 | -1.8 | 12/31/2025 |
| Western Standard LLC | 4.99 | 2,247,591 | -10.3 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.32 | 1,945,076 | +0.0 | 03/31/2026 |
| Prescott Group Capital Management LLC | 3.54 | 1,592,587 | +78.2 | 03/31/2026 |
| Wolf Hill Capital Management, LP | 3.27 | 1,470,334 | -22.2 | 03/31/2026 |
| Gendell Jeffrey L | 3.14 | 1,413,212 | -10.0 | 03/31/2026 |
| Third Avenue Management LLC | 2.98 | 1,341,211 | +71.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Total Stock Mkt Idx Inv | 3.08 | 1,384,276 | +0.0 | 04/30/2026 |
| Third Avenue Small Cap Value Instl | 2.97 | 1,338,765 | +71.5 | 03/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 9. Jul 2026 | LeBlanc Claude | Chief Executive Officer | Other | 21,777 | 6.08 | 132,404 |
| 9. Jul 2026 | LeBlanc Claude | Chief Executive Officer | Other | 39,380 | – | – |
| 9. Jul 2026 | Smith R Sharon | Exec VP & Group COO | Other | 4,635 | 6.08 | 28,181 |
| 9. Jul 2026 | Smith R Sharon | Exec VP & Group COO | Other | 11,779 | – | – |
| 9. Jul 2026 | Trick David | Exec VP, CFO & Treasurer | Other | 6,741 | 6.08 | 40,985 |
| 9. Jul 2026 | Trick David | Exec VP, CFO & Treasurer | Other | 13,206 | – | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.