Octave Specialty Group Inc
OSG- Exchange
- NYSE
- Industry
- Surety Insurance
- SEC CIK
- 0000874501
No open-market purchases or sales by Octave Specialty Group Inc insiders were filed in the last 90 days; 147 institutions reported holding it in 13F filings for Q2 2026, worth $187.6M in total; no superinvestor holds it.
13F holders, Q4 2025
Institutional positions in Octave Specialty Group Inc as of Dec 31, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 144
- +16 vs. Q3 2025
- Shares held
- 34.7M
- −2.92M (−7.8%) vs. Q3 2025
- Total value
- $270.0M
- −$33.4M (−11.0%) vs. Q3 2025
- New holders
- 31
- 25 more added
- Sold out
- 15
- 69 more reduced
2 institutions that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q3 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting OSG on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 147 | $187.6M |
| Q1 2026 | 148 | $151.4M |
| Q4 2025 | 144 | $270.0M |
| Q3 2025 | 130 | $303.6M |
| Q2 2025 | 147 | $262.5M |
| Q1 2025 | 176 | $327.5M |
| Q4 2024 | 181 | $522.4M |
| Q3 2024 | 180 | $449.6M |
| Q2 2024 | 182 | $495.9M |
| Q1 2024 | 172 | $591.5M |
| Q4 2023 | 174 | $628.4M |
| Q3 2023 | 167 | $438.7M |
| Q2 2023 | 160 | $529.6M |
| Q1 2023 | 160 | $596.2M |
| Q4 2022 | 167 | $600.4M |
| Q3 2022 | 154 | $400.7M |
| Q2 2022 | 141 | $386.6M |
| Q1 2022 | 150 | $392.1M |
| Q4 2021 | 135 | $598.9M |
| Q3 2021 | 133 | $516.2M |
| Q2 2021 | 126 | $565.0M |
| Q1 2021 | 140 | $611.7M |
Institutions, Q4 2025
Shares, value and share of portfolio for each institution holding Octave Specialty Group Inc; share changes are against Q3 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Inscription Capital, LLC | 10,800 | $84.0K | 0.01% | +10,800 | New |
| Prelude Capital Management, LLC | 10,643 | $82.8K | 0.01% | −7,235−40.5% | Reduced |
| Simplex Trading, LLC | 10,611 | $82.6K | 0.00% | −10,267−49.2% | Reduced |
| Quest Partners LLC | 10,158 | $79.0K | 0.00% | +10,158 | New |
| New York State Common Retirement Fund | 10,073 | $78.4K | 0.00% | 00.0% | Unchanged |
| Kemnay Advisory Services Inc. | 8,059 | $62.7K | 0.01% | +8,059 | New |
| Citigroup Inc | 7,098 | $55.2K | 0.00% | −2,243−24.0% | Reduced |
| CWM, LLC | 5,598 | $44.0K | 0.00% | −1,363−19.6% | Reduced |
| Federated Hermes, Inc. | 4,420 | $34.4K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 3,839 | $29.9K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 3,648 | $28.4K | 0.00% | 00.0% | Unchanged |
| California State Teachers Retirement System | 2,539 | $19.8K | 0.00% | −435−14.6% | Reduced |
| FMR LLC | 2,517 | $19.6K | 0.00% | −1,522,906−99.8% | Reduced |
| Sterling Capital Management LLC | 2,379 | $18.5K | 0.00% | −599−20.1% | Reduced |
| Quadrant Capital Group LLC | 1,878 | $14.6K | 0.00% | −605−24.4% | Reduced |
| Versant Capital Management, Inc | 1,823 | $14.2K | 0.00% | +204+12.6% | Added |
| Royal Bank of Canada | 1,194 | $10.0K | 0.00% | −1,149−49.0% | Reduced |
| Amalgamated Bank | 1,297 | $10.0K | 0.00% | −270−17.2% | Reduced |
| Tower Research Capital LLC (TRC) | 1,277 | $9.94K | 0.00% | −1,110−46.5% | Reduced |
| Harbor Capital Advisors, Inc. | 1,131 | $9.00K | 0.00% | −19−1.7% | Reduced |
| MAI Capital Management | 1,069 | $8.32K | 0.00% | +5+0.5% | Added |
| Torren Management, LLC | 1,024 | $7.97K | 0.00% | +1,024 | New |
| Nisa Investment Advisors, LLC | 970 | $7.55K | 0.00% | 00.0% | Unchanged |
| Wiser Advisor Group LLC | 500 | $3.89K | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 431 | $3.35K | 0.00% | −196−31.3% | Reduced |
| Capital Analysts, LLC | 325 | $3.00K | 0.00% | 00.0% | Unchanged |
| Optiver Holding B.V. | 370 | $2.88K | 0.00% | −54−12.7% | Reduced |
| Allworth Financial LP | 291 | $2.26K | 0.00% | −99−25.4% | Reduced |
| SRS Capital Advisors, Inc. | 257 | $2.00K | 0.00% | −6,357−96.1% | Reduced |
| Signaturefd, LLC | 180 | $1.40K | 0.00% | −574−76.1% | Reduced |
| DiNuzzo Private Wealth, Inc. | 177 | $1.38K | 0.00% | 00.0% | Unchanged |
| Los Angeles Capital Management LLC | 148 | $1.26K | 0.00% | +148 | New |
| Parallel Advisors, LLC | 151 | $1.18K | 0.00% | −109−41.9% | Reduced |
| Farther Finance Advisors, LLC | 122 | $949 | 0.00% | +17+16.2% | Added |
| The PNC Financial Services Group, Inc. | 113 | $878 | 0.00% | −30−21.0% | Reduced |
| Advisors Asset Management, Inc. | 98 | $762 | 0.00% | −3−3.0% | Reduced |
| US Bancorp | 81 | $630 | 0.00% | −674−89.3% | Reduced |
| EverSource Wealth Advisors, LLC | 58 | $451 | 0.00% | −14−19.4% | Reduced |
| True Wealth Design, LLC | 45 | $351 | 0.00% | −6−11.8% | Reduced |
| Rothschild Investment LLC | 32 | $249 | 0.00% | −30−48.4% | Reduced |
| IFP Advisors, Inc | 31 | $241 | 0.00% | +16+106.7% | Added |
| Advisor Group Holdings, Inc. | 26 | $201 | 0.00% | 00.0% | Unchanged |
| Legacy Wealth Managment, LLC | 25 | $195 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 10 | $78 | 0.00% | −2−16.7% | Reduced |
| Continental General Insurance Co | 0 | $0 | 0.00% | −2,068,349−100.0% | Sold out |
| Empowered Funds, LLC | 0 | $0 | 0.00% | −234,493−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −175,017−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −136,696−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −125,155−100.0% | Sold out |
| Empirical Finance, LLC | 0 | $0 | 0.00% | −72,182−100.0% | Sold out |
| Sender Co & Partners, Inc. | 0 | $0 | 0.00% | −70,890−100.0% | Sold out |
| Cresset Asset Management, LLC | 0 | $0 | 0.00% | −22,193−100.0% | Sold out |
| Gator Capital Management, LLC | 0 | $0 | 0.00% | −21,435−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −20,449−100.0% | Sold out |
| Ieq Capital, LLC | 0 | $0 | 0.00% | −13,702−100.0% | Sold out |
| FNY Investment Advisers, LLC | 0 | $0 | 0.00% | −11,207−100.0% | Sold out |
| National Bank of Canada | 0 | $0 | 0.00% | −385−100.0% | Sold out |
| Principal Securities, Inc. | 0 | $0 | 0.00% | −120−100.0% | Sold out |
| Essential Partners LLC | 0 | $0 | 0.00% | −14−100.0% | Sold out |
| Wolverine Trading, LLC | – | – | – | – | Not filed |
| Cove Street Capital, LLC | – | – | – | – | Not filed |