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 |
|---|---|---|---|---|---|
| Point72 Asset Management, L.P. | 103,544 | $805.6K | 0.00% | +103,544 | New |
| Cruiser Capital Advisors, LLC | 107,140 | $833.5K | 0.86% | −4,660−4.2% | Reduced |
| ExodusPoint Capital Management, LP | 109,765 | $854.0K | 0.01% | +95,606+675.2% | Added |
| HRT Financial LP | 111,702 | $869.0K | 0.00% | +111,702 | New |
| American Century Companies Inc | 123,599 | $961.6K | 0.00% | −9,049−6.8% | Reduced |
| Legato Capital Management LLC | 132,620 | $1.03M | 0.09% | +132,620 | New |
| Bank of New York Mellon Corp | 138,173 | $1.07M | 0.00% | −514−0.4% | Reduced |
| JPMorgan Chase & Co | 152,695 | $1.19M | 0.00% | +118,140+341.9% | Added |
| UBS Group AG | 153,864 | $1.20M | 0.00% | −125,625−44.9% | Reduced |
| Invesco Ltd. | 156,504 | $1.22M | 0.00% | −7,577−4.6% | Reduced |
| Schonfeld Strategic Advisors LLC | 169,824 | $1.32M | 0.01% | −378,618−69.0% | Reduced |
| VELA Investment Management, LLC | 178,752 | $1.39M | 0.38% | −1,337−0.7% | Reduced |
| Harbor Advisors LLC | 196,382 | $1.53M | 0.23% | 00.0% | Unchanged |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | 203,011 | $1.58M | 0.23% | 00.0% | Unchanged |
| Jacobs Levy Equity Management, Inc | 237,185 | $1.85M | 0.01% | +237,185 | New |
| Bridgeway Capital Management, LLC | 245,387 | $1.91M | 0.04% | −74,106−23.2% | Reduced |
| Citadel Advisors LLC | 287,283 | $2.24M | 0.00% | +115,740+67.5% | Added |
| Millennium Management LLC | 303,282 | $2.36M | 0.00% | −397,613−56.7% | Reduced |
| Northern Trust Corp | 323,146 | $2.51M | 0.00% | −38,875−10.7% | Reduced |
| Bank of America Corp | 330,901 | $2.57M | 0.00% | +127,699+62.8% | Added |
| Russell Investments Group, Ltd. | 346,258 | $2.69M | 0.00% | +341,342+6,943.5% | Added |
| Charles Schwab Investment Management Inc | 361,424 | $2.81M | 0.00% | −21,148−5.5% | Reduced |
| SG Americas Securities, LLC | 403,237 | $3.14M | 0.00% | +327,822+434.7% | Added |
| Essex Investment Management Co LLC | 410,822 | $3.20M | 0.49% | +410,822 | New |
| Susquehanna International Group, LLP | 526,588 | $4.10M | 0.01% | +252,278+92.0% | Added |
| Bracebridge Capital, LLC | 579,234 | $4.51M | 1.64% | 00.0% | Unchanged |
| Barclays PLC | 680,441 | $5.29M | 0.00% | +10,928+1.6% | Added |
| Marshall Wace, LLP | 748,572 | $5.82M | 0.01% | +293,498+64.5% | Added |
| Goldman Sachs Group Inc | 779,975 | $6.07M | 0.00% | +255,085+48.6% | Added |
| Third Avenue Management LLC | 782,093 | $6.08M | 1.11% | +178,702+29.6% | Added |
| Nuveen, LLC | 810,279 | $6.30M | 0.00% | −269,049−24.9% | Reduced |
| Prescott Group Capital Management, L.L.C. | 893,517 | $6.95M | 0.65% | −2,460−0.3% | Reduced |
| Morgan Stanley | 938,712 | $7.30M | 0.00% | +744,588+383.6% | Added |
| State Street Corp | 943,368 | $7.34M | 0.00% | −23,820−2.5% | Reduced |
| Geode Capital Management, LLC | 1,024,547 | $7.97M | 0.00% | −36,047−3.4% | Reduced |
| Caption Management, LLC | 1,071,094 | $8.33M | 0.37% | −50,085−4.5% | Reduced |
| Bain Capital Credit, LP | 1,108,012 | $8.62M | 2.25% | 00.0% | Unchanged |
| Jane Street Group, LLC | 1,520,654 | $11.8M | 0.01% | +671,472+79.1% | Added |
| Gendell Jeffrey L | 1,569,472 | $12.2M | 0.21% | −295,040−15.8% | Reduced |
| Dimensional Fund Advisors LP | 1,685,627 | $13.1M | 0.00% | −455,420−21.3% | Reduced |
| Wolf Hill Capital Management, LP | 1,888,973 | $14.7M | 1.71% | +730,776+63.1% | Added |
| Western Standard LLC | 2,504,627 | $19.5M | 8.99% | −136,724−5.2% | Reduced |
| Vanguard Group Inc | 2,508,395 | $19.5M | 0.00% | −46,786−1.8% | Reduced |
| BlackRock, Inc. | 4,488,468 | $34.9M | 0.00% | −4,863−0.1% | 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 |