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, Q3 2025
Institutional positions in Octave Specialty Group Inc as of Sep 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
- 130
- −14 vs. Q2 2025
- Shares held
- 37.6M
- +1.47M (+4.1%) vs. Q2 2025
- Total value
- $303.6M
- +$46.8M (+18.2%) vs. Q2 2025
- New holders
- 22
- 44 more added
- Sold out
- 36
- 46 more reduced
3 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Octave Specialty Group Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BlackRock, Inc. | 4,493,331 | $37.5M | 0.00% | −94,723−2.1% | Reduced |
| Western Standard LLC | 2,641,351 | $22.0M | 11.78% | +2,641,351 | New |
| Vanguard Group Inc | 2,555,181 | $21.3M | 0.00% | −13,259−0.5% | Reduced |
| Dimensional Fund Advisors LP | 2,141,047 | $17.9M | 0.00% | −254,690−10.6% | Reduced |
| Continental General Insurance Co | 2,068,349 | $17.3M | 3.34% | +850,000+69.8% | Added |
| Gendell Jeffrey L | 1,864,512 | $15.6M | 0.29% | +666,092+55.6% | Added |
| FMR LLC | 1,525,423 | $12.7M | 0.00% | −7,222−0.5% | Reduced |
| Wolf Hill Capital Management, LP | 1,158,197 | $9.66M | 0.92% | +464,753+67.0% | Added |
| Caption Management, LLC | 1,121,179 | $9.35M | 0.54% | +945,105+536.8% | Added |
| Bain Capital Credit, LP | 1,108,012 | $9.24M | 2.91% | 00.0% | Unchanged |
| Nuveen, LLC | 1,079,328 | $9.00M | 0.00% | +612,350+131.1% | Added |
| Geode Capital Management, LLC | 1,060,594 | $8.85M | 0.00% | −62,022−5.5% | Reduced |
| State Street Corp | 967,188 | $8.07M | 0.00% | +8,333+0.9% | Added |
| Prescott Group Capital Management, L.L.C. | 895,977 | $7.47M | 0.79% | +20,000+2.3% | Added |
| Jane Street Group, LLC | 849,182 | $7.08M | 0.01% | +336,739+65.7% | Added |
| Millennium Management LLC | 700,895 | $5.85M | 0.00% | −295,146−29.6% | Reduced |
| Barclays PLC | 669,513 | $5.58M | 0.00% | +214,686+47.2% | Added |
| Third Avenue Management LLC | 603,391 | $4.91M | 0.92% | 00.0% | Unchanged |
| Bracebridge Capital, LLC | 579,234 | $4.83M | 2.01% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 548,442 | $4.57M | 0.03% | +262,861+92.0% | Added |
| Deutsche Bank AG | 532,138 | $4.44M | 0.00% | −113,222−17.5% | Reduced |
| Goldman Sachs Group Inc | 524,890 | $4.38M | 0.00% | +45,507+9.5% | Added |
| Marshall Wace, LLP | 455,074 | $3.80M | 0.00% | −193,081−29.8% | Reduced |
| Charles Schwab Investment Management Inc | 382,572 | $3.19M | 0.00% | −5,387−1.4% | Reduced |
| Northern Trust Corp | 362,021 | $3.02M | 0.00% | −26,900−6.9% | Reduced |
| Bridgeway Capital Management, LLC | 319,493 | $2.66M | 0.06% | +2,244+0.7% | Added |
| UBS Group AG | 279,489 | $2.33M | 0.00% | −80,776−22.4% | Reduced |
| Susquehanna International Group, LLP | 274,310 | $2.29M | 0.00% | −666,273−70.8% | Reduced |
| Empowered Funds, LLC | 234,493 | $1.96M | 0.02% | +27,244+13.1% | Added |
| Bank of America Corp | 203,202 | $1.69M | 0.00% | +36,937+22.2% | Added |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | 203,011 | $1.69M | 2.48% | +203,011 | New |
| Harbor Advisors LLC | 196,382 | $1.64M | 0.25% | 00.0% | Unchanged |
| Morgan Stanley | 194,124 | $1.62M | 0.00% | −263,507−57.6% | Reduced |
| VELA Investment Management, LLC | 180,089 | $1.50M | 0.43% | +57,319+46.7% | Added |
| Squarepoint Ops LLC | 175,017 | $1.46M | 0.00% | −291,352−62.5% | Reduced |
| Citadel Advisors LLC | 171,543 | $1.43M | 0.00% | −947,218−84.7% | Reduced |
| Invesco Ltd. | 164,081 | $1.37M | 0.00% | −6,355−3.7% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 150,489 | $1.26M | 0.03% | −200,212−57.1% | Reduced |
| Bank of New York Mellon Corp | 138,687 | $1.16M | 0.00% | −3,248−2.3% | Reduced |
| Trexquant Investment LP | 136,696 | $1.14M | 0.01% | −180,264−56.9% | Reduced |
| American Century Companies Inc | 132,648 | $1.11M | 0.00% | −305,687−69.7% | Reduced |
| Tudor Investment Corp Et Al | 125,155 | $1.04M | 0.01% | −180,547−59.1% | Reduced |
| D. E. Shaw & Co., Inc. | 118,725 | $990.2K | 0.00% | −216,922−64.6% | Reduced |
| Cruiser Capital Advisors, LLC | 111,800 | $932.4K | 0.93% | +111,800 | New |
| Connor, Clark & Lunn Investment Management Ltd. | 105,465 | $879.6K | 0.00% | −5,588−5.0% | Reduced |
| HSBC Holdings PLC | 103,668 | $827.6K | 0.00% | +6,320+6.5% | Added |
| IMC-Chicago, LLC | 97,422 | $812.5K | 0.01% | −43,604−30.9% | Reduced |
| Creative Planning | 90,303 | $753.1K | 0.00% | +69,882+342.2% | Added |
| Renaissance Technologies LLC | 89,200 | $743.9K | 0.00% | −96,900−52.1% | Reduced |
| BNP Paribas Arbitrage, SA | 89,147 | $743.5K | 0.00% | −30,321−25.4% | Reduced |
| AQR Capital Management LLC | 82,562 | $688.6K | 0.00% | +31,262+60.9% | Added |
| Balyasny Asset Management LLC | 81,221 | $677.4K | 0.00% | +81,221 | New |
| DLD Asset Management, LP | 79,300 | $661.4K | 0.09% | +29,300+58.6% | Added |
| SG Americas Securities, LLC | 75,415 | $629.0K | 0.00% | +53,773+248.5% | Added |
| Wells Fargo & Company | 73,857 | $616.0K | 0.00% | +2,049+2.9% | Added |
| Empirical Finance, LLC | 72,182 | $602.0K | 0.03% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 70,941 | $592.0K | 0.00% | +18,736+35.9% | Added |
| Sender Co & Partners, Inc. | 70,890 | $591.2K | 0.23% | +70,890 | New |
| Rhumbline Advisers | 67,170 | $560.2K | 0.00% | −7,746−10.3% | Reduced |
| Caxton Associates LLP | 65,647 | $547.5K | 0.02% | 00.0% | Unchanged |
| Diametric Capital, LP | 64,626 | $539.0K | 0.20% | +64,626 | New |
| Prudential Financial Inc | 56,625 | $472.3K | 0.00% | +56,625 | New |
| Quantinno Capital Management LP | 40,353 | $336.5K | 0.00% | +11,527+40.0% | Added |
| Alliancebernstein L.P. | 37,530 | $313.0K | 0.00% | 00.0% | Unchanged |
| Brevan Howard Capital Management LP | 35,485 | $295.9K | 0.00% | −15,218−30.0% | Reduced |
| JPMorgan Chase & Co | 34,555 | $288.2K | 0.00% | +3,324+10.6% | Added |
| Quarry LP | 26,000 | $216.8K | 0.05% | +24,445+1,572.0% | Added |
| Wolverine Trading, LLC | 21,298 | $207.0K | 0.00% | +21,298 | New |
| KLCM Advisors, Inc. | 24,000 | $200.2K | 0.02% | 00.0% | Unchanged |
| Intech Investment Management LLC | 22,520 | $187.8K | 0.00% | −18,868−45.6% | Reduced |
| Cresset Asset Management, LLC | 22,193 | $185.1K | 0.00% | 00.0% | Unchanged |
| Gator Capital Management, LLC | 21,435 | $178.8K | 0.05% | 00.0% | Unchanged |
| Simplex Trading, LLC | 20,878 | $174.0K | 0.00% | −10,341−33.1% | Reduced |
| Verition Fund Management LLC | 20,533 | $171.2K | 0.00% | −18,785−47.8% | Reduced |
| Group One Trading, L.P. | 20,449 | $170.5K | 0.01% | −301,275−93.6% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 20,052 | $167.2K | 0.00% | −6,229−23.7% | Reduced |
| MetLife Investment Management | 18,353 | $153.1K | 0.00% | +18,353 | New |
| Mraz, Amerine & Associates, Inc. | 18,250 | $152.2K | 0.02% | −600−3.2% | Reduced |
| Prelude Capital Management, LLC | 17,878 | $149.1K | 0.01% | +17,878 | New |
| ExodusPoint Capital Management, LP | 14,159 | $118.1K | 0.00% | −31,915−69.3% | Reduced |
| Ieq Capital, LLC | 13,702 | $114.3K | 0.00% | +35+0.3% | Added |
| State Board of Administration of Florida Retirement System | 12,630 | $105.3K | 0.00% | 00.0% | Unchanged |
| Aquatic Capital Management LLC | 12,588 | $105.0K | 0.00% | +12,588 | New |
| Police & Firemen's Retirement System of New Jersey | 11,825 | $98.6K | 0.00% | +2,623+28.5% | Added |
| Cerity Partners LLC | 11,490 | $95.8K | 0.00% | −361−3.0% | Reduced |
| FNY Investment Advisers, LLC | 11,207 | $93.0K | 0.03% | +11,207 | New |
| New York State Common Retirement Fund | 10,073 | $84.0K | 0.00% | 00.0% | Unchanged |
| Citigroup Inc | 9,341 | $77.9K | 0.00% | −13,690−59.4% | Reduced |
| CWM, LLC | 6,961 | $58.0K | 0.00% | +2,999+75.7% | Added |
| SRS Capital Advisors, Inc. | 6,614 | $55.2K | 0.00% | +6,614 | New |
| Russell Investments Group, Ltd. | 4,916 | $41.0K | 0.00% | +4,227+613.5% | Added |
| Federated Hermes, Inc. | 4,420 | $36.9K | 0.00% | −811−15.5% | Reduced |
| Legal & General Group Plc | 3,839 | $32.0K | 0.00% | −466−10.8% | Reduced |
| Ameritas Investment Partners, Inc. | 3,648 | $30.4K | 0.00% | −935−20.4% | Reduced |
| Sterling Capital Management LLC | 2,978 | $24.8K | 0.00% | +1,758+144.1% | Added |
| California State Teachers Retirement System | 2,974 | $24.8K | 0.00% | +2,974 | New |
| State of Wyoming | 2,589 | $21.6K | 0.00% | −11,912−82.1% | Reduced |
| Quadrant Capital Group LLC | 2,483 | $20.7K | 0.00% | +2,483 | New |
| Royal Bank of Canada | 2,343 | $20.0K | 0.00% | −49,866−95.5% | Reduced |
| Tower Research Capital LLC (TRC) | 2,387 | $19.9K | 0.00% | +877+58.1% | Added |