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, Q2 2025
Institutional positions in Octave Specialty Group Inc as of Jun 30, 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
- 147
- −28 vs. Q1 2025
- Shares held
- 37.0M
- −580.5K (−1.5%) vs. Q1 2025
- Total value
- $262.5M
- −$65.1M (−19.9%) vs. Q1 2025
- New holders
- 31
- 47 more added
- Sold out
- 59
- 50 more reduced
1 institution that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 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, Q2 2025
Shares, value and share of portfolio for each institution holding Octave Specialty Group Inc; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Walleye Trading LLC | 154,159 | $1.09M | 0.03% | −143,339−48.2% | Reduced |
| Ameriprise Financial Inc | 164,805 | $1.17M | 0.00% | +65,253+65.5% | Added |
| Bank of America Corp | 166,265 | $1.18M | 0.00% | −17,373−9.5% | Reduced |
| Invesco Ltd. | 170,436 | $1.21M | 0.00% | −10,059−5.6% | Reduced |
| Caption Management, LLC | 176,074 | $1.25M | 0.11% | −187,008−51.5% | Reduced |
| Renaissance Technologies LLC | 186,100 | $1.32M | 0.00% | +14,600+8.5% | Added |
| Harbor Advisors LLC | 196,382 | $1.39M | 0.23% | 00.0% | Unchanged |
| Empowered Funds, LLC | 207,249 | $1.47M | 0.02% | +12,122+6.2% | Added |
| Schonfeld Strategic Advisors LLC | 285,581 | $2.03M | 0.02% | −236,903−45.3% | Reduced |
| Cubist Systematic Strategies, LLC | 299,948 | $2.13M | 0.02% | +129,305+75.8% | Added |
| Immersion Corp | 300,000 | $2.13M | 1.08% | +300,000 | New |
| Tudor Investment Corp Et Al | 305,702 | $2.17M | 0.02% | +28,873+10.4% | Added |
| Trexquant Investment LP | 316,960 | $2.25M | 0.03% | +155,864+96.8% | Added |
| Bridgeway Capital Management, LLC | 317,249 | $2.25M | 0.05% | +12,122+4.0% | Added |
| Group One Trading, L.P. | 321,724 | $2.28M | 0.07% | −19,744−5.8% | Reduced |
| D. E. Shaw & Co., Inc. | 335,647 | $2.38M | 0.00% | −75,823−18.4% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 350,701 | $2.49M | 0.06% | +204,255+139.5% | Added |
| UBS Group AG | 360,265 | $2.56M | 0.00% | +218,334+153.8% | Added |
| Charles Schwab Investment Management Inc | 387,959 | $2.75M | 0.00% | +9,195+2.4% | Added |
| Northern Trust Corp | 388,921 | $2.76M | 0.00% | −72,335−15.7% | Reduced |
| American Century Companies Inc | 438,335 | $3.11M | 0.00% | −417,926−48.8% | Reduced |
| Barclays PLC | 454,827 | $3.23M | 0.00% | −34,919−7.1% | Reduced |
| Morgan Stanley | 457,631 | $3.25M | 0.00% | −400,409−46.7% | Reduced |
| Squarepoint Ops LLC | 466,369 | $3.31M | 0.01% | +233,986+100.7% | Added |
| Nuveen, LLC | 466,978 | $3.32M | 0.00% | +184,321+65.2% | Added |
| Goldman Sachs Group Inc | 479,383 | $3.40M | 0.00% | −200,796−29.5% | Reduced |
| Jane Street Group, LLC | 512,443 | $3.64M | 0.01% | −211,651−29.2% | Reduced |
| Bracebridge Capital, LLC | 579,234 | $4.11M | 2.19% | 00.0% | Unchanged |
| Third Avenue Management LLC | 603,391 | $4.28M | 0.88% | +236,930+64.7% | Added |
| Deutsche Bank AG | 645,360 | $4.58M | 0.00% | −77,890−10.8% | Reduced |
| Marshall Wace, LLP | 648,155 | $4.60M | 0.01% | +442,750+215.5% | Added |
| Wolf Hill Capital Management, LP | 693,444 | $4.92M | 0.41% | 00.0% | Unchanged |
| Repertoire Partners LP | 721,188 | $5.12M | 86.09% | −452,686−38.6% | Reduced |
| Hotchkis & Wiley Capital Management LLC | 793,500 | $5.63M | 0.02% | +235,820+42.3% | Added |
| Prescott Group Capital Management, L.L.C. | 875,977 | $6.22M | 0.73% | +433,613+98.0% | Added |
| Susquehanna International Group, LLP | 940,583 | $6.68M | 0.01% | −239,974−20.3% | Reduced |
| State Street Corp | 958,855 | $6.81M | 0.00% | −73,439−7.1% | Reduced |
| Millennium Management LLC | 996,041 | $7.07M | 0.01% | +487,355+95.8% | Added |
| Bain Capital Credit, LP | 1,108,012 | $7.87M | 2.86% | 00.0% | Unchanged |
| Citadel Advisors LLC | 1,118,761 | $7.94M | 0.01% | +16,039+1.5% | Added |
| Geode Capital Management, LLC | 1,122,616 | $7.97M | 0.00% | +27,670+2.5% | Added |
| Gendell Jeffrey L | 1,198,420 | $8.51M | 0.23% | +596,134+99.0% | Added |
| Continental General Insurance Co | 1,218,349 | $8.65M | 2.22% | +1,218,349 | New |
| FMR LLC | 1,532,645 | $10.9M | 0.00% | −3,026−0.2% | Reduced |
| Dimensional Fund Advisors LP | 2,395,737 | $17.0M | 0.00% | −161,143−6.3% | Reduced |
| Vanguard Group Inc | 2,568,440 | $18.2M | 0.00% | −92,442−3.5% | Reduced |
| BlackRock, Inc. | 4,588,054 | $32.6M | 0.00% | −306,626−6.3% | Reduced |
| Western Standard LLC | 0 | $0 | 0.00% | −699,352−100.0% | Sold out |
| Arrowstreet Capital, Limited Partnership | 0 | $0 | 0.00% | −145,901−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −118,765−100.0% | Sold out |
| Occudo Quantitative Strategies LP | 0 | $0 | 0.00% | −114,575−100.0% | Sold out |
| Wolverine Trading, LLC | 0 | $0 | 0.00% | −101,058−100.0% | Sold out |
| Swiss National Bank | 0 | $0 | 0.00% | −91,900−100.0% | Sold out |
| UBS Asset Management Americas Inc | 0 | $0 | 0.00% | −89,256−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −77,234−100.0% | Sold out |
| Royce & Associates LP | 0 | $0 | 0.00% | −66,122−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −64,233−100.0% | Sold out |
| Algert Global LLC | 0 | $0 | 0.00% | −62,719−100.0% | Sold out |
| California State Teachers Retirement System | 0 | $0 | 0.00% | −44,277−100.0% | Sold out |
| Oxford Asset Management LLP | 0 | $0 | 0.00% | −42,123−100.0% | Sold out |
| HAP Trading, LLC | 0 | $0 | 0.00% | −41,939−100.0% | Sold out |
| Jain Global LLC | 0 | $0 | 0.00% | −36,672−100.0% | Sold out |
| Great West Life Assurance Co | 0 | $0 | 0.00% | −34,226−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −33,100−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −32,300−100.0% | Sold out |
| Magnetar Financial LLC | 0 | $0 | 0.00% | −27,188−100.0% | Sold out |
| Freestone Grove Partners LP | 0 | $0 | 0.00% | −25,759−100.0% | Sold out |
| Ensign Peak Advisors, Inc | 0 | $0 | 0.00% | −24,133−100.0% | Sold out |
| MetLife Investment Management | 0 | $0 | 0.00% | −23,542−100.0% | Sold out |
| Quantessence Capital LLC | 0 | $0 | 0.00% | −23,500−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −22,301−100.0% | Sold out |
| EntryPoint Capital, LLC | 0 | $0 | 0.00% | −20,235−100.0% | Sold out |
| Janus Henderson Group PLC | 0 | $0 | 0.00% | −19,792−100.0% | Sold out |
| Petrus Trust Company, LTA | 0 | $0 | 0.00% | −19,432−100.0% | Sold out |
| Laurion Capital Management LP | 0 | $0 | 0.00% | −16,353−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −15,470−100.0% | Sold out |
| Arizona State Retirement System | 0 | $0 | 0.00% | −13,609−100.0% | Sold out |
| SummitTX Capital, L.P. | 0 | $0 | 0.00% | −13,069−100.0% | Sold out |
| Catalyst Funds Management Pty Ltd | 0 | $0 | 0.00% | −12,840−100.0% | Sold out |
| KLP Kapitalforvaltning AS | 0 | $0 | 0.00% | −12,400−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −12,198−100.0% | Sold out |
| Inceptionr LLC | 0 | $0 | 0.00% | −11,189−100.0% | Sold out |
| State of Tennessee, Treasury Department | 0 | $0 | 0.00% | −11,095−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −10,800−100.0% | Sold out |
| CIBC World Markets Corp | 0 | $0 | 0.00% | −10,101−100.0% | Sold out |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 0 | $0 | 0.00% | −9,826−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −6,947−100.0% | Sold out |
| Teachers Retirement System of the State of Kentucky | 0 | $0 | 0.00% | −1,601−100.0% | Sold out |
| Fifth Third Bancorp | 0 | $0 | 0.00% | −622−100.0% | Sold out |
| Wiser Advisor Group LLC | 0 | $0 | 0.00% | −500−100.0% | Sold out |
| Barrow Hanley Mewhinney & Strauss LLC | 0 | $0 | 0.00% | −450−100.0% | Sold out |
| Boston Private Wealth LLC | 0 | $0 | 0.00% | −281−100.0% | Sold out |
| Farther Finance Advisors, LLC | 0 | $0 | 0.00% | −256−100.0% | Sold out |
| Pinnacle Holdings, LLC | 0 | $0 | 0.00% | −186−100.0% | Sold out |
| Red Tortoise LLC | 0 | $0 | 0.00% | −180−100.0% | Sold out |
| Huntington National Bank | 0 | $0 | 0.00% | −158−100.0% | Sold out |
| Assetmark, Inc | 0 | $0 | 0.00% | −158−100.0% | Sold out |
| Smartleaf Asset Management LLC | 0 | $0 | 0.00% | −96−100.0% | Sold out |
| Massmutual Trust Co FSB | 0 | $0 | 0.00% | −81−100.0% | Sold out |
| Parkside Financial Bank & Trust | 0 | $0 | 0.00% | −55−100.0% | Sold out |