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 |
|---|---|---|---|---|---|
| Cove Street Capital, LLC | 1,861 | $15.5K | 0.02% | +1,861 | New |
| Versant Capital Management, Inc | 1,619 | $13.5K | 0.00% | 00.0% | Unchanged |
| Amalgamated Bank | 1,567 | $13.0K | 0.00% | 00.0% | Unchanged |
| Harbor Capital Advisors, Inc. | 1,150 | $10.0K | 0.00% | +26+2.3% | Added |
| MAI Capital Management | 1,064 | $8.87K | 0.00% | +1,064 | New |
| Nisa Investment Advisors, LLC | 970 | $8.09K | 0.00% | −48−4.7% | Reduced |
| US Bancorp | 755 | $6.30K | 0.00% | +528+232.6% | Added |
| Signaturefd, LLC | 754 | $6.29K | 0.00% | +638+550.0% | Added |
| GAMMA Investing LLC | 627 | $5.23K | 0.00% | −133−17.5% | Reduced |
| Wiser Advisor Group LLC | 500 | $4.17K | 0.01% | +500 | New |
| Optiver Holding B.V. | 424 | $3.54K | 0.00% | +424 | New |
| Allworth Financial LP | 390 | $3.25K | 0.00% | +253+184.7% | Added |
| National Bank of Canada | 385 | $3.21K | 0.00% | +378+5,400.0% | Added |
| Capital Analysts, LLC | 325 | $3.00K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 260 | $2.17K | 0.00% | +245+1,633.3% | Added |
| DiNuzzo Private Wealth, Inc. | 177 | $1.60K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 143 | $1.19K | 0.00% | +42+41.6% | Added |
| Principal Securities, Inc. | 120 | $1.00K | 0.00% | +120 | New |
| Farther Finance Advisors, LLC | 105 | $876 | 0.00% | +105 | New |
| EverSource Wealth Advisors, LLC | 72 | $600 | 0.00% | +21+41.2% | Added |
| Rothschild Investment LLC | 62 | $517 | 0.00% | +30+93.8% | Added |
| True Wealth Design, LLC | 51 | $426 | 0.00% | +16+45.7% | Added |
| Advisor Group Holdings, Inc. | 26 | $234 | 0.00% | 00.0% | Unchanged |
| Legacy Wealth Managment, LLC | 25 | $209 | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 15 | $125 | 0.00% | +15 | Added |
| Essential Partners LLC | 14 | $117 | 0.00% | +14 | New |
| SBI Securities Co., Ltd. | 12 | $100 | 0.00% | −428−97.3% | Reduced |
| Manufacturers Life Insurance Company, The | 1,206,350 | – | – | +1,188,357+6,604.6% | Added |
| Franklin Resources Inc | 17,080 | – | – | +6,403+60.0% | Added |
| Advisors Asset Management, Inc. | 101 | – | – | −1−1.0% | Reduced |
| Hotchkis & Wiley Capital Management LLC | 0 | $0 | 0.00% | −793,500−100.0% | Sold out |
| Immersion Corp | 0 | $0 | 0.00% | −300,000−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −299,948−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −164,805−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −154,159−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −119,016−100.0% | Sold out |
| Nebula Research & Development LLC | 0 | $0 | 0.00% | −107,124−100.0% | Sold out |
| Public Sector Pension Investment Board | 0 | $0 | 0.00% | −72,000−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −62,840−100.0% | Sold out |
| Aurelius Capital Management, LP | 0 | $0 | 0.00% | −60,546−100.0% | Sold out |
| State of Wisconsin Investment Board | 0 | $0 | 0.00% | −59,544−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −46,815−100.0% | Sold out |
| Engineers Gate Manager LP | 0 | $0 | 0.00% | −46,607−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −43,923−100.0% | Sold out |
| First Citizens Bank & Trust Co | 0 | $0 | 0.00% | −43,210−100.0% | Sold out |
| Envestnet Portfolio Solutions, Inc. | 0 | $0 | 0.00% | −41,667−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −38,524−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −38,094−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −37,922−100.0% | Sold out |
| Qube Research & Technologies Ltd | 0 | $0 | 0.00% | −37,584−100.0% | Sold out |
| Axq Capital, LP | 0 | $0 | 0.00% | −35,439−100.0% | Sold out |
| Point72 Asia (Singapore) Pte. Ltd. | 0 | $0 | 0.00% | −33,143−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −31,418−100.0% | Sold out |
| FJ Capital Management LLC | 0 | $0 | 0.00% | −24,677−100.0% | Sold out |
| SEI Investments Co | 0 | $0 | 0.00% | −23,565−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −18,834−100.0% | Sold out |
| Winton Group Ltd | 0 | $0 | 0.00% | −15,197−100.0% | Sold out |
| Point72 Hong Kong Ltd | 0 | $0 | 0.00% | −14,151−100.0% | Sold out |
| Voya Investment Management LLC | 0 | $0 | 0.00% | −12,946−100.0% | Sold out |
| LM Asset (IM) Inc. | 0 | $0 | 0.00% | −6,000−100.0% | Sold out |
| Point72 (DIFC) Ltd | 0 | $0 | 0.00% | −5,943−100.0% | Sold out |
| Caitong International Asset Management Co., Ltd | 0 | $0 | 0.00% | −410−100.0% | Sold out |
| Skopos Labs, Inc. | 0 | $0 | 0.00% | −303−100.0% | Sold out |
| CoreCap Advisors, LLC | 0 | $0 | 0.00% | −266−100.0% | Sold out |
| Glenmede Investment Management, LP | 0 | $0 | 0.00% | −161−100.0% | Sold out |
| Bessemer Group Inc | 0 | $0 | 0.00% | −29−100.0% | Sold out |
| Repertoire Partners LP | – | – | – | – | Not filed |
| Norges Bank | – | – | – | – | Not filed |
| Legacy Investment Solutions, LLC | – | – | – | – | Not filed |