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 |
|---|---|---|---|---|---|
| SBI Securities Co., Ltd. | 12 | $100 | 0.00% | −428−97.3% | Reduced |
| Essential Partners LLC | 14 | $117 | 0.00% | +14 | New |
| IFP Advisors, Inc | 15 | $125 | 0.00% | +15 | Added |
| Legacy Wealth Managment, LLC | 25 | $209 | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 26 | $234 | 0.00% | 00.0% | Unchanged |
| True Wealth Design, LLC | 51 | $426 | 0.00% | +16+45.7% | Added |
| Rothschild Investment LLC | 62 | $517 | 0.00% | +30+93.8% | Added |
| EverSource Wealth Advisors, LLC | 72 | $600 | 0.00% | +21+41.2% | Added |
| Farther Finance Advisors, LLC | 105 | $876 | 0.00% | +105 | New |
| Principal Securities, Inc. | 120 | $1.00K | 0.00% | +120 | New |
| The PNC Financial Services Group, Inc. | 143 | $1.19K | 0.00% | +42+41.6% | Added |
| DiNuzzo Private Wealth, Inc. | 177 | $1.60K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 260 | $2.17K | 0.00% | +245+1,633.3% | Added |
| Capital Analysts, LLC | 325 | $3.00K | 0.00% | 00.0% | Unchanged |
| National Bank of Canada | 385 | $3.21K | 0.00% | +378+5,400.0% | Added |
| Allworth Financial LP | 390 | $3.25K | 0.00% | +253+184.7% | Added |
| Optiver Holding B.V. | 424 | $3.54K | 0.00% | +424 | New |
| Wiser Advisor Group LLC | 500 | $4.17K | 0.01% | +500 | New |
| GAMMA Investing LLC | 627 | $5.23K | 0.00% | −133−17.5% | Reduced |
| Signaturefd, LLC | 754 | $6.29K | 0.00% | +638+550.0% | Added |
| US Bancorp | 755 | $6.30K | 0.00% | +528+232.6% | Added |
| Nisa Investment Advisors, LLC | 970 | $8.09K | 0.00% | −48−4.7% | Reduced |
| MAI Capital Management | 1,064 | $8.87K | 0.00% | +1,064 | New |
| Harbor Capital Advisors, Inc. | 1,150 | $10.0K | 0.00% | +26+2.3% | Added |
| Amalgamated Bank | 1,567 | $13.0K | 0.00% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 1,619 | $13.5K | 0.00% | 00.0% | Unchanged |
| Cove Street Capital, LLC | 1,861 | $15.5K | 0.02% | +1,861 | New |
| Tower Research Capital LLC (TRC) | 2,387 | $19.9K | 0.00% | +877+58.1% | Added |
| Royal Bank of Canada | 2,343 | $20.0K | 0.00% | −49,866−95.5% | Reduced |
| Quadrant Capital Group LLC | 2,483 | $20.7K | 0.00% | +2,483 | New |
| State of Wyoming | 2,589 | $21.6K | 0.00% | −11,912−82.1% | Reduced |
| California State Teachers Retirement System | 2,974 | $24.8K | 0.00% | +2,974 | New |
| Sterling Capital Management LLC | 2,978 | $24.8K | 0.00% | +1,758+144.1% | Added |
| Ameritas Investment Partners, Inc. | 3,648 | $30.4K | 0.00% | −935−20.4% | Reduced |
| Legal & General Group Plc | 3,839 | $32.0K | 0.00% | −466−10.8% | Reduced |
| Federated Hermes, Inc. | 4,420 | $36.9K | 0.00% | −811−15.5% | Reduced |
| Russell Investments Group, Ltd. | 4,916 | $41.0K | 0.00% | +4,227+613.5% | Added |
| SRS Capital Advisors, Inc. | 6,614 | $55.2K | 0.00% | +6,614 | New |
| CWM, LLC | 6,961 | $58.0K | 0.00% | +2,999+75.7% | Added |
| Citigroup Inc | 9,341 | $77.9K | 0.00% | −13,690−59.4% | Reduced |
| New York State Common Retirement Fund | 10,073 | $84.0K | 0.00% | 00.0% | Unchanged |
| FNY Investment Advisers, LLC | 11,207 | $93.0K | 0.03% | +11,207 | New |
| Cerity Partners LLC | 11,490 | $95.8K | 0.00% | −361−3.0% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 11,825 | $98.6K | 0.00% | +2,623+28.5% | Added |
| Aquatic Capital Management LLC | 12,588 | $105.0K | 0.00% | +12,588 | New |
| State Board of Administration of Florida Retirement System | 12,630 | $105.3K | 0.00% | 00.0% | Unchanged |
| Ieq Capital, LLC | 13,702 | $114.3K | 0.00% | +35+0.3% | Added |
| ExodusPoint Capital Management, LP | 14,159 | $118.1K | 0.00% | −31,915−69.3% | Reduced |
| Prelude Capital Management, LLC | 17,878 | $149.1K | 0.01% | +17,878 | New |
| Mraz, Amerine & Associates, Inc. | 18,250 | $152.2K | 0.02% | −600−3.2% | Reduced |
| MetLife Investment Management | 18,353 | $153.1K | 0.00% | +18,353 | New |
| Mirae Asset Global ETFs Holdings Ltd. | 20,052 | $167.2K | 0.00% | −6,229−23.7% | Reduced |
| Group One Trading, L.P. | 20,449 | $170.5K | 0.01% | −301,275−93.6% | Reduced |
| Verition Fund Management LLC | 20,533 | $171.2K | 0.00% | −18,785−47.8% | Reduced |
| Simplex Trading, LLC | 20,878 | $174.0K | 0.00% | −10,341−33.1% | Reduced |
| Gator Capital Management, LLC | 21,435 | $178.8K | 0.05% | 00.0% | Unchanged |
| Cresset Asset Management, LLC | 22,193 | $185.1K | 0.00% | 00.0% | Unchanged |
| Intech Investment Management LLC | 22,520 | $187.8K | 0.00% | −18,868−45.6% | Reduced |
| KLCM Advisors, Inc. | 24,000 | $200.2K | 0.02% | 00.0% | Unchanged |
| Wolverine Trading, LLC | 21,298 | $207.0K | 0.00% | +21,298 | New |
| Quarry LP | 26,000 | $216.8K | 0.05% | +24,445+1,572.0% | Added |
| JPMorgan Chase & Co | 34,555 | $288.2K | 0.00% | +3,324+10.6% | Added |
| Brevan Howard Capital Management LP | 35,485 | $295.9K | 0.00% | −15,218−30.0% | Reduced |
| Alliancebernstein L.P. | 37,530 | $313.0K | 0.00% | 00.0% | Unchanged |
| Quantinno Capital Management LP | 40,353 | $336.5K | 0.00% | +11,527+40.0% | Added |
| Prudential Financial Inc | 56,625 | $472.3K | 0.00% | +56,625 | New |
| Diametric Capital, LP | 64,626 | $539.0K | 0.20% | +64,626 | New |
| Caxton Associates LLP | 65,647 | $547.5K | 0.02% | 00.0% | Unchanged |
| Rhumbline Advisers | 67,170 | $560.2K | 0.00% | −7,746−10.3% | Reduced |
| Sender Co & Partners, Inc. | 70,890 | $591.2K | 0.23% | +70,890 | New |
| Price T Rowe Associates Inc | 70,941 | $592.0K | 0.00% | +18,736+35.9% | Added |
| Empirical Finance, LLC | 72,182 | $602.0K | 0.03% | 00.0% | Unchanged |
| Wells Fargo & Company | 73,857 | $616.0K | 0.00% | +2,049+2.9% | Added |
| SG Americas Securities, LLC | 75,415 | $629.0K | 0.00% | +53,773+248.5% | Added |
| DLD Asset Management, LP | 79,300 | $661.4K | 0.09% | +29,300+58.6% | Added |
| Balyasny Asset Management LLC | 81,221 | $677.4K | 0.00% | +81,221 | New |
| AQR Capital Management LLC | 82,562 | $688.6K | 0.00% | +31,262+60.9% | Added |
| BNP Paribas Arbitrage, SA | 89,147 | $743.5K | 0.00% | −30,321−25.4% | Reduced |
| Renaissance Technologies LLC | 89,200 | $743.9K | 0.00% | −96,900−52.1% | Reduced |
| Creative Planning | 90,303 | $753.1K | 0.00% | +69,882+342.2% | Added |
| IMC-Chicago, LLC | 97,422 | $812.5K | 0.01% | −43,604−30.9% | Reduced |
| HSBC Holdings PLC | 103,668 | $827.6K | 0.00% | +6,320+6.5% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 105,465 | $879.6K | 0.00% | −5,588−5.0% | Reduced |
| Cruiser Capital Advisors, LLC | 111,800 | $932.4K | 0.93% | +111,800 | New |
| D. E. Shaw & Co., Inc. | 118,725 | $990.2K | 0.00% | −216,922−64.6% | Reduced |
| Tudor Investment Corp Et Al | 125,155 | $1.04M | 0.01% | −180,547−59.1% | Reduced |
| American Century Companies Inc | 132,648 | $1.11M | 0.00% | −305,687−69.7% | Reduced |
| Trexquant Investment LP | 136,696 | $1.14M | 0.01% | −180,264−56.9% | Reduced |
| Bank of New York Mellon Corp | 138,687 | $1.16M | 0.00% | −3,248−2.3% | Reduced |
| Y-Intercept (Hong Kong) Ltd | 150,489 | $1.26M | 0.03% | −200,212−57.1% | Reduced |
| Invesco Ltd. | 164,081 | $1.37M | 0.00% | −6,355−3.7% | Reduced |
| Citadel Advisors LLC | 171,543 | $1.43M | 0.00% | −947,218−84.7% | Reduced |
| Squarepoint Ops LLC | 175,017 | $1.46M | 0.00% | −291,352−62.5% | Reduced |
| VELA Investment Management, LLC | 180,089 | $1.50M | 0.43% | +57,319+46.7% | Added |
| Morgan Stanley | 194,124 | $1.62M | 0.00% | −263,507−57.6% | Reduced |
| Harbor Advisors LLC | 196,382 | $1.64M | 0.25% | 00.0% | Unchanged |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | 203,011 | $1.69M | 2.48% | +203,011 | New |
| Bank of America Corp | 203,202 | $1.69M | 0.00% | +36,937+22.2% | Added |
| Empowered Funds, LLC | 234,493 | $1.96M | 0.02% | +27,244+13.1% | Added |
| Susquehanna International Group, LLP | 274,310 | $2.29M | 0.00% | −666,273−70.8% | Reduced |