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 |
|---|---|---|---|---|---|
| SBI Securities Co., Ltd. | 10 | $78 | 0.00% | −2−16.7% | Reduced |
| Legacy Wealth Managment, LLC | 25 | $195 | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 26 | $201 | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 31 | $241 | 0.00% | +16+106.7% | Added |
| Rothschild Investment LLC | 32 | $249 | 0.00% | −30−48.4% | Reduced |
| True Wealth Design, LLC | 45 | $351 | 0.00% | −6−11.8% | Reduced |
| EverSource Wealth Advisors, LLC | 58 | $451 | 0.00% | −14−19.4% | Reduced |
| US Bancorp | 81 | $630 | 0.00% | −674−89.3% | Reduced |
| Advisors Asset Management, Inc. | 98 | $762 | 0.00% | −3−3.0% | Reduced |
| The PNC Financial Services Group, Inc. | 113 | $878 | 0.00% | −30−21.0% | Reduced |
| Farther Finance Advisors, LLC | 122 | $949 | 0.00% | +17+16.2% | Added |
| Parallel Advisors, LLC | 151 | $1.18K | 0.00% | −109−41.9% | Reduced |
| Los Angeles Capital Management LLC | 148 | $1.26K | 0.00% | +148 | New |
| DiNuzzo Private Wealth, Inc. | 177 | $1.38K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 180 | $1.40K | 0.00% | −574−76.1% | Reduced |
| SRS Capital Advisors, Inc. | 257 | $2.00K | 0.00% | −6,357−96.1% | Reduced |
| Allworth Financial LP | 291 | $2.26K | 0.00% | −99−25.4% | Reduced |
| Optiver Holding B.V. | 370 | $2.88K | 0.00% | −54−12.7% | Reduced |
| Capital Analysts, LLC | 325 | $3.00K | 0.00% | 00.0% | Unchanged |
| GAMMA Investing LLC | 431 | $3.35K | 0.00% | −196−31.3% | Reduced |
| Wiser Advisor Group LLC | 500 | $3.89K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 970 | $7.55K | 0.00% | 00.0% | Unchanged |
| Torren Management, LLC | 1,024 | $7.97K | 0.00% | +1,024 | New |
| MAI Capital Management | 1,069 | $8.32K | 0.00% | +5+0.5% | Added |
| Harbor Capital Advisors, Inc. | 1,131 | $9.00K | 0.00% | −19−1.7% | Reduced |
| Tower Research Capital LLC (TRC) | 1,277 | $9.94K | 0.00% | −1,110−46.5% | Reduced |
| 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 |
| Versant Capital Management, Inc | 1,823 | $14.2K | 0.00% | +204+12.6% | Added |
| Quadrant Capital Group LLC | 1,878 | $14.6K | 0.00% | −605−24.4% | Reduced |
| Sterling Capital Management LLC | 2,379 | $18.5K | 0.00% | −599−20.1% | Reduced |
| FMR LLC | 2,517 | $19.6K | 0.00% | −1,522,906−99.8% | Reduced |
| California State Teachers Retirement System | 2,539 | $19.8K | 0.00% | −435−14.6% | Reduced |
| Ameritas Investment Partners, Inc. | 3,648 | $28.4K | 0.00% | 00.0% | Unchanged |
| Legal & General Group Plc | 3,839 | $29.9K | 0.00% | 00.0% | Unchanged |
| Federated Hermes, Inc. | 4,420 | $34.4K | 0.00% | 00.0% | Unchanged |
| CWM, LLC | 5,598 | $44.0K | 0.00% | −1,363−19.6% | Reduced |
| Citigroup Inc | 7,098 | $55.2K | 0.00% | −2,243−24.0% | Reduced |
| Kemnay Advisory Services Inc. | 8,059 | $62.7K | 0.01% | +8,059 | New |
| New York State Common Retirement Fund | 10,073 | $78.4K | 0.00% | 00.0% | Unchanged |
| Quest Partners LLC | 10,158 | $79.0K | 0.00% | +10,158 | New |
| Simplex Trading, LLC | 10,611 | $82.6K | 0.00% | −10,267−49.2% | Reduced |
| Prelude Capital Management, LLC | 10,643 | $82.8K | 0.01% | −7,235−40.5% | Reduced |
| Inscription Capital, LLC | 10,800 | $84.0K | 0.01% | +10,800 | New |
| Crown Wealth Group, LLC | 11,162 | $86.8K | 0.02% | +11,162 | New |
| Voleon Capital Management LP | 11,204 | $87.2K | 0.00% | +11,204 | New |
| Cerity Partners LLC | 11,332 | $88.2K | 0.00% | −158−1.4% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 11,825 | $92.0K | 0.00% | 00.0% | Unchanged |
| Franklin Resources Inc | 11,959 | $93.0K | 0.00% | −5,121−30.0% | Reduced |
| nVerses Capital, LLC | 12,181 | $94.8K | 0.21% | +12,181 | New |
| Manufacturers Life Insurance Company, The | 12,594 | $98.0K | 0.00% | −1,193,756−99.0% | Reduced |
| State Board of Administration of Florida Retirement System | 12,630 | $98.3K | 0.00% | 00.0% | Unchanged |
| Quarry LP | 15,103 | $117.5K | 0.02% | −10,897−41.9% | Reduced |
| Verition Fund Management LLC | 17,500 | $136.2K | 0.00% | −3,033−14.8% | Reduced |
| Mraz, Amerine & Associates, Inc. | 18,950 | $147.4K | 0.02% | +700+3.8% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 19,152 | $149.0K | 0.00% | −900−4.5% | Reduced |
| Quantbot Technologies LP | 19,241 | $149.7K | 0.00% | +19,241 | New |
| State of Wyoming | 19,249 | $149.8K | 0.02% | +16,660+643.5% | Added |
| Virtu Financial LLC | 19,235 | $150.0K | 0.01% | +19,235 | New |
| MetLife Investment Management | 19,956 | $155.3K | 0.00% | +1,603+8.7% | Added |
| Brevan Howard Capital Management LP | 21,033 | $163.6K | 0.00% | −14,452−40.7% | Reduced |
| Intech Investment Management LLC | 21,038 | $163.7K | 0.00% | −1,482−6.6% | Reduced |
| Quadrature Capital Ltd | 21,219 | $165.1K | 0.00% | +21,219 | New |
| Acadian Asset Management LLC | 23,053 | $179.0K | 0.00% | +23,053 | New |
| Aquatic Capital Management LLC | 23,067 | $179.5K | 0.01% | +10,479+83.2% | Added |
| CIBC Asset Management Inc | 23,893 | $185.9K | 0.00% | +23,893 | New |
| KLCM Advisors, Inc. | 23,900 | $185.9K | 0.02% | −100−0.4% | Reduced |
| Metis Global Partners, LLC | 25,136 | $195.6K | 0.00% | +25,136 | New |
| Renaissance Technologies LLC | 25,158 | $195.7K | 0.00% | −64,042−71.8% | Reduced |
| Oxford Asset Management LLP | 25,413 | $197.7K | 0.07% | +25,413 | New |
| Deutsche Bank AG | 25,647 | $199.5K | 0.00% | −506,491−95.2% | Reduced |
| IMC-Chicago, LLC | 26,303 | $204.6K | 0.00% | −71,119−73.0% | Reduced |
| PEAK6 LLC | 30,478 | $237.1K | 0.01% | +30,478 | New |
| XTX Topco Ltd | 31,058 | $241.6K | 0.01% | +31,058 | New |
| Alliancebernstein L.P. | 37,530 | $292.0K | 0.00% | 00.0% | Unchanged |
| Axq Capital, LP | 40,374 | $314.1K | 0.07% | +40,374 | New |
| Fox Run Management, L.L.C. | 42,354 | $329.5K | 0.05% | +42,354 | New |
| Balyasny Asset Management LLC | 42,917 | $333.9K | 0.00% | −38,304−47.2% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 43,781 | $340.6K | 0.01% | −106,708−70.9% | Reduced |
| D. E. Shaw & Co., Inc. | 44,126 | $343.3K | 0.00% | −74,599−62.8% | Reduced |
| Two Sigma Investments, LP | 45,044 | $350.4K | 0.00% | +45,044 | New |
| Calamos Advisors LLC | 49,089 | $381.9K | 0.00% | +49,089 | New |
| Prudential Financial Inc | 54,340 | $422.8K | 0.00% | −2,285−4.0% | Reduced |
| Rhumbline Advisers | 57,471 | $447.1K | 0.00% | −9,699−14.4% | Reduced |
| DLD Asset Management, LP | 60,421 | $470.1K | 0.05% | −18,879−23.8% | Reduced |
| Caxton Associates LLP | 65,647 | $510.7K | 0.01% | 00.0% | Unchanged |
| Diametric Capital, LP | 66,478 | $517.2K | 0.14% | +1,852+2.9% | Added |
| SEI Investments Co | 66,718 | $519.1K | 0.00% | +66,718 | New |
| Creative Planning | 68,537 | $533.2K | 0.00% | −21,766−24.1% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 68,773 | $535.1K | 0.00% | −36,692−34.8% | Reduced |
| AQR Capital Management LLC | 70,128 | $545.6K | 0.00% | −12,434−15.1% | Reduced |
| Price T Rowe Associates Inc | 70,941 | $552.0K | 0.00% | 00.0% | Unchanged |
| Norges Bank | 75,000 | $583.5K | 0.00% | +75,000 | New |
| Quantinno Capital Management LP | 78,678 | $612.1K | 0.00% | +38,325+95.0% | Added |
| Engineers Gate Manager LP | 81,585 | $634.7K | 0.01% | +81,585 | New |
| Jump Financial, LLC | 85,213 | $663.0K | 0.01% | +85,213 | New |
| Wells Fargo & Company | 85,734 | $667.0K | 0.00% | +11,877+16.1% | Added |
| BNP Paribas Arbitrage, SA | 86,734 | $674.8K | 0.00% | −2,413−2.7% | Reduced |
| Walleye Capital LLC | 88,284 | $686.9K | 0.00% | +88,284 | New |
| HSBC Holdings PLC | 92,040 | $713.3K | 0.00% | −11,628−11.2% | Reduced |