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, Q2 2026
Institutional positions in Octave Specialty Group Inc as of Jun 30, 2026. 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
- 147
- +1 vs. Q1 2026
- Shares held
- 30.1M
- −2.14M (−6.7%) vs. Q1 2026
- Total value
- $187.6M
- +$37.7M (+25.1%) vs. Q1 2026
- New holders
- 36
- 51 more added
- Sold out
- 35
- 40 more reduced
2 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Octave Specialty Group Inc; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Renaissance Technologies LLC | 117,200 | $731.3K | 0.00% | −110,526−48.5% | Reduced |
| Diametric Capital, LP | 118,364 | $738.6K | 0.08% | +118,364 | New |
| Bridgeway Capital Management, LLC | 122,504 | $764.4K | 0.01% | −60,000−32.9% | Reduced |
| Invesco Ltd. | 127,868 | $797.9K | 0.00% | −23,174−15.3% | Reduced |
| Bank of America Corp | 131,360 | $819.7K | 0.00% | −124,750−48.7% | Reduced |
| Bank of New York Mellon Corp | 134,966 | $842.2K | 0.00% | +4,495+3.4% | Added |
| Susquehanna International Group, LLP | 136,692 | $853.0K | 0.00% | −253,501−65.0% | Reduced |
| Gsa Capital Partners LLP | 143,566 | $896.0K | 0.06% | +143,566 | New |
| UBS Group AG | 147,197 | $918.5K | 0.00% | −117,083−44.3% | Reduced |
| Legato Capital Management LLC | 181,037 | $1.13M | 0.09% | +50,277+38.4% | Added |
| Quantinno Capital Management LP | 190,283 | $1.19M | 0.00% | +141,583+290.7% | Added |
| Russell Investments Group, Ltd. | 195,046 | $1.22M | 0.00% | +13,775+7.6% | Added |
| Harbor Advisors LLC | 196,382 | $1.23M | 0.15% | 00.0% | Unchanged |
| Tudor Investment Corp Et Al | 216,362 | $1.35M | 0.01% | +56,399+35.3% | Added |
| Prudential Financial Inc | 226,010 | $1.41M | 0.00% | +155,900+222.4% | Added |
| AQR Capital Management LLC | 229,890 | $1.43M | 0.00% | +180,062+361.4% | Added |
| Raymond James Financial Inc | 239,680 | $1.50M | 0.00% | +214,024+834.2% | Added |
| Jane Street Group, LLC | 278,731 | $1.74M | 0.00% | −485,653−63.5% | Reduced |
| AYAL Capital Advisors Ltd | 280,000 | $1.75M | 0.89% | +280,000 | New |
| Vanguard Fiduciary Trust Co | 295,841 | $1.85M | 0.00% | +21,279+7.8% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 302,913 | $1.89M | 0.00% | +158,612+109.9% | Added |
| IPG Investment Advisors LLC | 303,930 | $1.90M | 0.27% | −21,686−6.7% | Reduced |
| Northern Trust Corp | 352,680 | $2.20M | 0.00% | +30,332+9.4% | Added |
| Charles Schwab Investment Management Inc | 377,869 | $2.36M | 0.00% | +82,525+27.9% | Added |
| Vanguard Portfolio Management LLC | 392,350 | $2.45M | 0.00% | +96,450+32.6% | Added |
| Caption Management, LLC | 419,136 | $2.62M | 0.09% | −223,461−34.8% | Reduced |
| Citadel Advisors LLC | 422,777 | $2.64M | 0.00% | −9,032−2.1% | Reduced |
| Nuveen, LLC | 428,165 | $2.67M | 0.00% | −372,088−46.5% | Reduced |
| Wolf Hill Capital Management, LP | 480,187 | $3.00M | 0.29% | −990,147−67.3% | Reduced |
| Gendell Jeffrey L | 494,092 | $3.08M | 0.03% | −919,120−65.0% | Reduced |
| Essex Investment Management Co LLC | 539,289 | $3.37M | 0.44% | +121,086+29.0% | Added |
| RIHO Partners, LLC | 554,818 | $3.46M | 1.95% | +8,249+1.5% | Added |
| Goldman Sachs Group Inc | 560,756 | $3.50M | 0.00% | +214,463+61.9% | Added |
| Morgan Stanley | 569,563 | $3.55M | 0.00% | +334,317+142.1% | Added |
| Bracebridge Capital, LLC | 579,234 | $3.61M | 0.78% | 00.0% | Unchanged |
| Zacks Investment Management | 590,370 | $3.68M | 0.03% | +590,370 | New |
| Marshall Wace, LLP | 601,796 | $3.76M | 0.00% | −463,539−43.5% | Reduced |
| Jacobs Levy Equity Management, Inc | 649,530 | $4.05M | 0.01% | −234,742−26.5% | Reduced |
| Dimensional Fund Advisors LP | 716,947 | $4.47M | 0.00% | −593,185−45.3% | Reduced |
| State Street Corp | 898,673 | $5.61M | 0.00% | −42,731−4.5% | Reduced |
| Geode Capital Management, LLC | 1,106,335 | $6.91M | 0.00% | +83,897+8.2% | Added |
| Bain Capital Credit, LP | 1,108,012 | $6.91M | 1.88% | 00.0% | Unchanged |
| Third Avenue Management LLC | 1,341,879 | $8.37M | 1.34% | +6680.0% | Added |
| Prescott Group Capital Management, L.L.C. | 1,647,793 | $10.3M | 0.89% | +55,206+3.5% | Added |
| Vanguard Capital Management LLC | 1,972,619 | $12.3M | 0.00% | +27,543+1.4% | Added |
| Western Standard LLC | 2,247,591 | $14.0M | 4.75% | 00.0% | Unchanged |
| BlackRock, Inc. | 4,572,516 | $28.5M | 0.00% | +654,718+16.7% | Added |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | 0 | $0 | 0.00% | −139,168−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −113,656−100.0% | Sold out |
| Cruiser Capital Advisors, LLC | 0 | $0 | 0.00% | −108,798−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −76,907−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −67,134−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −50,974−100.0% | Sold out |
| Acadian Asset Management LLC | 0 | $0 | 0.00% | −42,930−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −38,708−100.0% | Sold out |
| Commonwealth Financial Services, LLC | 0 | $0 | 0.00% | −29,008−100.0% | Sold out |
| CIBC Asset Management Inc | 0 | $0 | 0.00% | −23,893−100.0% | Sold out |
| Empirical Asset Management, LLC | 0 | $0 | 0.00% | −23,440−100.0% | Sold out |
| Park Capital Management, LLC | 0 | $0 | 0.00% | −21,262−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −18,197−100.0% | Sold out |
| Quotient Wealth Partners, LLC | 0 | $0 | 0.00% | −16,896−100.0% | Sold out |
| Anchyra Partners LLC | 0 | $0 | 0.00% | −16,328−100.0% | Sold out |
| Centiva Capital, LP | 0 | $0 | 0.00% | −16,085−100.0% | Sold out |
| Able Wealth Management LLC | 0 | $0 | 0.00% | −15,246−100.0% | Sold out |
| Daymark Wealth Partners, LLC | 0 | $0 | 0.00% | −14,596−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −13,500−100.0% | Sold out |
| Aire Advisors, LLC | 0 | $0 | 0.00% | −13,446−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −13,053−100.0% | Sold out |
| Symmetry Partners, LLC | 0 | $0 | 0.00% | −11,007−100.0% | Sold out |
| IMC-Chicago, LLC | 0 | $0 | 0.00% | −10,897−100.0% | Sold out |
| United Capital Financial Advisers, LLC | 0 | $0 | 0.00% | −10,405−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −9,458−100.0% | Sold out |
| Parallel Advisors, LLC | 0 | $0 | 0.00% | −6,473−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −4,420−100.0% | Sold out |
| Quadrant Capital Group LLC | 0 | $0 | 0.00% | −1,572−100.0% | Sold out |
| MAI Capital Management | 0 | $0 | 0.00% | −1,064−100.0% | Sold out |
| Bell Investment Advisors, Inc | 0 | $0 | 0.00% | −293−100.0% | Sold out |
| Bare Financial Services, Inc | 0 | $0 | 0.00% | −87−100.0% | Sold out |
| GAMMA Investing LLC | 0 | $0 | 0.00% | −72−100.0% | Sold out |
| Legacy Wealth Managment, LLC | 0 | $0 | 0.00% | −25−100.0% | Sold out |
| Root Financial Partners, LLC | 0 | $0 | 0.00% | −22−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −20−100.0% | Sold out |
| Skopos Labs, Inc. | – | – | – | – | Not filed |
| CWM, LLC | – | – | – | – | Not filed |