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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 4,488,468 | $34.9M | 0.00% | −4,863−0.1% | Reduced |
| Vanguard Group Inc | 2,508,395 | $19.5M | 0.00% | −46,786−1.8% | Reduced |
| Western Standard LLC | 2,504,627 | $19.5M | 8.99% | −136,724−5.2% | Reduced |
| Wolf Hill Capital Management, LP | 1,888,973 | $14.7M | 1.71% | +730,776+63.1% | Added |
| Dimensional Fund Advisors LP | 1,685,627 | $13.1M | 0.00% | −455,420−21.3% | Reduced |
| Gendell Jeffrey L | 1,569,472 | $12.2M | 0.21% | −295,040−15.8% | Reduced |
| Jane Street Group, LLC | 1,520,654 | $11.8M | 0.01% | +671,472+79.1% | Added |
| Bain Capital Credit, LP | 1,108,012 | $8.62M | 2.25% | 00.0% | Unchanged |
| Caption Management, LLC | 1,071,094 | $8.33M | 0.37% | −50,085−4.5% | Reduced |
| Geode Capital Management, LLC | 1,024,547 | $7.97M | 0.00% | −36,047−3.4% | Reduced |
| State Street Corp | 943,368 | $7.34M | 0.00% | −23,820−2.5% | Reduced |
| Morgan Stanley | 938,712 | $7.30M | 0.00% | +744,588+383.6% | Added |
| Prescott Group Capital Management, L.L.C. | 893,517 | $6.95M | 0.65% | −2,460−0.3% | Reduced |
| Nuveen, LLC | 810,279 | $6.30M | 0.00% | −269,049−24.9% | Reduced |
| Third Avenue Management LLC | 782,093 | $6.08M | 1.11% | +178,702+29.6% | Added |
| Goldman Sachs Group Inc | 779,975 | $6.07M | 0.00% | +255,085+48.6% | Added |
| Marshall Wace, LLP | 748,572 | $5.82M | 0.01% | +293,498+64.5% | Added |
| Barclays PLC | 680,441 | $5.29M | 0.00% | +10,928+1.6% | Added |
| Bracebridge Capital, LLC | 579,234 | $4.51M | 1.64% | 00.0% | Unchanged |
| Susquehanna International Group, LLP | 526,588 | $4.10M | 0.01% | +252,278+92.0% | Added |
| Essex Investment Management Co LLC | 410,822 | $3.20M | 0.49% | +410,822 | New |
| SG Americas Securities, LLC | 403,237 | $3.14M | 0.00% | +327,822+434.7% | Added |
| Charles Schwab Investment Management Inc | 361,424 | $2.81M | 0.00% | −21,148−5.5% | Reduced |
| Russell Investments Group, Ltd. | 346,258 | $2.69M | 0.00% | +341,342+6,943.5% | Added |
| Bank of America Corp | 330,901 | $2.57M | 0.00% | +127,699+62.8% | Added |
| Northern Trust Corp | 323,146 | $2.51M | 0.00% | −38,875−10.7% | Reduced |
| Millennium Management LLC | 303,282 | $2.36M | 0.00% | −397,613−56.7% | Reduced |
| Citadel Advisors LLC | 287,283 | $2.24M | 0.00% | +115,740+67.5% | Added |
| Bridgeway Capital Management, LLC | 245,387 | $1.91M | 0.04% | −74,106−23.2% | Reduced |
| Jacobs Levy Equity Management, Inc | 237,185 | $1.85M | 0.01% | +237,185 | New |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | 203,011 | $1.58M | 0.23% | 00.0% | Unchanged |
| Harbor Advisors LLC | 196,382 | $1.53M | 0.23% | 00.0% | Unchanged |
| VELA Investment Management, LLC | 178,752 | $1.39M | 0.38% | −1,337−0.7% | Reduced |
| Schonfeld Strategic Advisors LLC | 169,824 | $1.32M | 0.01% | −378,618−69.0% | Reduced |
| Invesco Ltd. | 156,504 | $1.22M | 0.00% | −7,577−4.6% | Reduced |
| UBS Group AG | 153,864 | $1.20M | 0.00% | −125,625−44.9% | Reduced |
| JPMorgan Chase & Co | 152,695 | $1.19M | 0.00% | +118,140+341.9% | Added |
| Bank of New York Mellon Corp | 138,173 | $1.07M | 0.00% | −514−0.4% | Reduced |
| Legato Capital Management LLC | 132,620 | $1.03M | 0.09% | +132,620 | New |
| American Century Companies Inc | 123,599 | $961.6K | 0.00% | −9,049−6.8% | Reduced |
| HRT Financial LP | 111,702 | $869.0K | 0.00% | +111,702 | New |
| ExodusPoint Capital Management, LP | 109,765 | $854.0K | 0.01% | +95,606+675.2% | Added |
| Cruiser Capital Advisors, LLC | 107,140 | $833.5K | 0.86% | −4,660−4.2% | Reduced |
| Point72 Asset Management, L.P. | 103,544 | $805.6K | 0.00% | +103,544 | New |
| HSBC Holdings PLC | 92,040 | $713.3K | 0.00% | −11,628−11.2% | Reduced |
| Walleye Capital LLC | 88,284 | $686.9K | 0.00% | +88,284 | New |
| BNP Paribas Arbitrage, SA | 86,734 | $674.8K | 0.00% | −2,413−2.7% | Reduced |
| Wells Fargo & Company | 85,734 | $667.0K | 0.00% | +11,877+16.1% | Added |
| Jump Financial, LLC | 85,213 | $663.0K | 0.01% | +85,213 | New |
| Engineers Gate Manager LP | 81,585 | $634.7K | 0.01% | +81,585 | New |
| Quantinno Capital Management LP | 78,678 | $612.1K | 0.00% | +38,325+95.0% | Added |
| Norges Bank | 75,000 | $583.5K | 0.00% | +75,000 | New |
| Price T Rowe Associates Inc | 70,941 | $552.0K | 0.00% | 00.0% | Unchanged |
| AQR Capital Management LLC | 70,128 | $545.6K | 0.00% | −12,434−15.1% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 68,773 | $535.1K | 0.00% | −36,692−34.8% | Reduced |
| Creative Planning | 68,537 | $533.2K | 0.00% | −21,766−24.1% | Reduced |
| SEI Investments Co | 66,718 | $519.1K | 0.00% | +66,718 | New |
| Diametric Capital, LP | 66,478 | $517.2K | 0.14% | +1,852+2.9% | Added |
| Caxton Associates LLP | 65,647 | $510.7K | 0.01% | 00.0% | Unchanged |
| DLD Asset Management, LP | 60,421 | $470.1K | 0.05% | −18,879−23.8% | Reduced |
| Rhumbline Advisers | 57,471 | $447.1K | 0.00% | −9,699−14.4% | Reduced |
| Prudential Financial Inc | 54,340 | $422.8K | 0.00% | −2,285−4.0% | Reduced |
| Calamos Advisors LLC | 49,089 | $381.9K | 0.00% | +49,089 | New |
| Two Sigma Investments, LP | 45,044 | $350.4K | 0.00% | +45,044 | New |
| D. E. Shaw & Co., Inc. | 44,126 | $343.3K | 0.00% | −74,599−62.8% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 43,781 | $340.6K | 0.01% | −106,708−70.9% | Reduced |
| Balyasny Asset Management LLC | 42,917 | $333.9K | 0.00% | −38,304−47.2% | Reduced |
| Fox Run Management, L.L.C. | 42,354 | $329.5K | 0.05% | +42,354 | New |
| Axq Capital, LP | 40,374 | $314.1K | 0.07% | +40,374 | New |
| Alliancebernstein L.P. | 37,530 | $292.0K | 0.00% | 00.0% | Unchanged |
| XTX Topco Ltd | 31,058 | $241.6K | 0.01% | +31,058 | New |
| PEAK6 LLC | 30,478 | $237.1K | 0.01% | +30,478 | New |
| IMC-Chicago, LLC | 26,303 | $204.6K | 0.00% | −71,119−73.0% | Reduced |
| Deutsche Bank AG | 25,647 | $199.5K | 0.00% | −506,491−95.2% | Reduced |
| Oxford Asset Management LLP | 25,413 | $197.7K | 0.07% | +25,413 | New |
| Renaissance Technologies LLC | 25,158 | $195.7K | 0.00% | −64,042−71.8% | Reduced |
| Metis Global Partners, LLC | 25,136 | $195.6K | 0.00% | +25,136 | New |
| KLCM Advisors, Inc. | 23,900 | $185.9K | 0.02% | −100−0.4% | Reduced |
| CIBC Asset Management Inc | 23,893 | $185.9K | 0.00% | +23,893 | New |
| Aquatic Capital Management LLC | 23,067 | $179.5K | 0.01% | +10,479+83.2% | Added |
| Acadian Asset Management LLC | 23,053 | $179.0K | 0.00% | +23,053 | New |
| Quadrature Capital Ltd | 21,219 | $165.1K | 0.00% | +21,219 | New |
| Intech Investment Management LLC | 21,038 | $163.7K | 0.00% | −1,482−6.6% | Reduced |
| Brevan Howard Capital Management LP | 21,033 | $163.6K | 0.00% | −14,452−40.7% | Reduced |
| MetLife Investment Management | 19,956 | $155.3K | 0.00% | +1,603+8.7% | Added |
| Virtu Financial LLC | 19,235 | $150.0K | 0.01% | +19,235 | New |
| State of Wyoming | 19,249 | $149.8K | 0.02% | +16,660+643.5% | Added |
| Quantbot Technologies LP | 19,241 | $149.7K | 0.00% | +19,241 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 19,152 | $149.0K | 0.00% | −900−4.5% | Reduced |
| Mraz, Amerine & Associates, Inc. | 18,950 | $147.4K | 0.02% | +700+3.8% | Added |
| Verition Fund Management LLC | 17,500 | $136.2K | 0.00% | −3,033−14.8% | Reduced |
| Quarry LP | 15,103 | $117.5K | 0.02% | −10,897−41.9% | Reduced |
| State Board of Administration of Florida Retirement System | 12,630 | $98.3K | 0.00% | 00.0% | Unchanged |
| Manufacturers Life Insurance Company, The | 12,594 | $98.0K | 0.00% | −1,193,756−99.0% | Reduced |
| nVerses Capital, LLC | 12,181 | $94.8K | 0.21% | +12,181 | New |
| Franklin Resources Inc | 11,959 | $93.0K | 0.00% | −5,121−30.0% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 11,825 | $92.0K | 0.00% | 00.0% | Unchanged |
| Cerity Partners LLC | 11,332 | $88.2K | 0.00% | −158−1.4% | Reduced |
| Voleon Capital Management LP | 11,204 | $87.2K | 0.00% | +11,204 | New |
| Crown Wealth Group, LLC | 11,162 | $86.8K | 0.02% | +11,162 | New |