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 | $271.0M |
| Q3 2025 | 130 | $539.7M |
| Q2 2025 | 147 | $262.8M |
| Q1 2025 | 176 | $327.7M |
| Q4 2024 | 181 | $522.4M |
| Q3 2024 | 180 | $452.5M |
| Q2 2024 | 182 | $498.0M |
| Q1 2024 | 172 | $611.1M |
| Q4 2023 | 174 | $638.1M |
| Q3 2023 | 167 | $438.8M |
| Q2 2023 | 160 | $529.6M |
| Q1 2023 | 160 | $629.3M |
| Q4 2022 | 167 | $600.8M |
| Q3 2022 | 155 | $402.6M |
| Q2 2022 | 141 | $386.6M |
| Q1 2022 | 150 | $392.1M |
| Q4 2021 | 135 | $611.5M |
| 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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 4,572,516 | $28.5M | 0.00% | +654,718+16.7% | Added |
| Western Standard LLC | 2,247,591 | $14.0M | 4.75% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 1,972,619 | $12.3M | 0.00% | +27,543+1.4% | Added |
| Prescott Group Capital Management, L.L.C. | 1,647,793 | $10.3M | 0.89% | +55,206+3.5% | Added |
| Third Avenue Management LLC | 1,341,879 | $8.37M | 1.34% | +6680.0% | Added |
| Bain Capital Credit, LP | 1,108,012 | $6.91M | 1.88% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 1,106,335 | $6.91M | 0.00% | +83,897+8.2% | Added |
| State Street Corp | 898,673 | $5.61M | 0.00% | −42,731−4.5% | Reduced |
| Dimensional Fund Advisors LP | 716,947 | $4.47M | 0.00% | −593,185−45.3% | Reduced |
| Jacobs Levy Equity Management, Inc | 649,530 | $4.05M | 0.01% | −234,742−26.5% | Reduced |
| Marshall Wace, LLP | 601,796 | $3.76M | 0.00% | −463,539−43.5% | Reduced |
| Zacks Investment Management | 590,370 | $3.68M | 0.03% | +590,370 | New |
| Bracebridge Capital, LLC | 579,234 | $3.61M | 0.78% | 00.0% | Unchanged |
| Morgan Stanley | 569,563 | $3.55M | 0.00% | +334,317+142.1% | Added |
| Goldman Sachs Group Inc | 560,756 | $3.50M | 0.00% | +214,463+61.9% | Added |
| RIHO Partners, LLC | 554,818 | $3.46M | 1.95% | +8,249+1.5% | Added |
| Essex Investment Management Co LLC | 539,289 | $3.37M | 0.44% | +121,086+29.0% | Added |
| Gendell Jeffrey L | 494,092 | $3.08M | 0.03% | −919,120−65.0% | Reduced |
| Wolf Hill Capital Management, LP | 480,187 | $3.00M | 0.29% | −990,147−67.3% | Reduced |
| Nuveen, LLC | 428,165 | $2.67M | 0.00% | −372,088−46.5% | Reduced |
| Citadel Advisors LLC | 422,777 | $2.64M | 0.00% | −9,032−2.1% | Reduced |
| Caption Management, LLC | 419,136 | $2.62M | 0.09% | −223,461−34.8% | Reduced |
| Vanguard Portfolio Management LLC | 392,350 | $2.45M | 0.00% | +96,450+32.6% | Added |
| Charles Schwab Investment Management Inc | 377,869 | $2.36M | 0.00% | +82,525+27.9% | Added |
| Northern Trust Corp | 352,680 | $2.20M | 0.00% | +30,332+9.4% | Added |
| IPG Investment Advisors LLC | 303,930 | $1.90M | 0.27% | −21,686−6.7% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 302,913 | $1.89M | 0.00% | +158,612+109.9% | Added |
| Vanguard Fiduciary Trust Co | 295,841 | $1.85M | 0.00% | +21,279+7.8% | Added |
| AYAL Capital Advisors Ltd | 280,000 | $1.75M | 0.89% | +280,000 | New |
| Jane Street Group, LLC | 278,731 | $1.74M | 0.00% | −485,653−63.5% | Reduced |
| Raymond James Financial Inc | 239,680 | $1.50M | 0.00% | +214,024+834.2% | Added |
| AQR Capital Management LLC | 229,890 | $1.43M | 0.00% | +180,062+361.4% | Added |
| Prudential Financial Inc | 226,010 | $1.41M | 0.00% | +155,900+222.4% | Added |
| Tudor Investment Corp Et Al | 216,362 | $1.35M | 0.01% | +56,399+35.3% | Added |
| Harbor Advisors LLC | 196,382 | $1.23M | 0.15% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 195,046 | $1.22M | 0.00% | +13,775+7.6% | Added |
| Quantinno Capital Management LP | 190,283 | $1.19M | 0.00% | +141,583+290.7% | Added |
| Legato Capital Management LLC | 181,037 | $1.13M | 0.09% | +50,277+38.4% | Added |
| UBS Group AG | 147,197 | $918.5K | 0.00% | −117,083−44.3% | Reduced |
| Gsa Capital Partners LLP | 143,566 | $896.0K | 0.06% | +143,566 | New |
| Susquehanna International Group, LLP | 136,692 | $853.0K | 0.00% | −253,501−65.0% | Reduced |
| Bank of New York Mellon Corp | 134,966 | $842.2K | 0.00% | +4,495+3.4% | Added |
| Bank of America Corp | 131,360 | $819.7K | 0.00% | −124,750−48.7% | Reduced |
| Invesco Ltd. | 127,868 | $797.9K | 0.00% | −23,174−15.3% | Reduced |
| Bridgeway Capital Management, LLC | 122,504 | $764.4K | 0.01% | −60,000−32.9% | Reduced |
| Diametric Capital, LP | 118,364 | $738.6K | 0.08% | +118,364 | New |
| Renaissance Technologies LLC | 117,200 | $731.3K | 0.00% | −110,526−48.5% | Reduced |
| Wells Fargo & Company | 116,707 | $728.3K | 0.00% | +61,383+111.0% | Added |
| Price T Rowe Associates Inc | 116,612 | $728.0K | 0.00% | +14,647+14.4% | Added |
| HSBC Holdings PLC | 114,498 | $723.5K | 0.00% | +12,068+11.8% | Added |
| SEI Investments Co | 109,389 | $682.6K | 0.00% | −46,689−29.9% | Reduced |
| Clifford Capital Partners LLC | 107,676 | $671.9K | 0.09% | +107,676 | New |
| American Century Companies Inc | 91,000 | $567.8K | 0.00% | −29,540−24.5% | Reduced |
| Man Group plc | 66,579 | $415.5K | 0.00% | +66,579 | New |
| Vanguard Global Advisers, LLC | 63,120 | $393.9K | 0.00% | +44,469+238.4% | Added |
| Public Employees Retirement System of Ohio | 61,305 | $382.5K | 0.00% | −7,500−10.9% | Reduced |
| GWN Securities Inc. | 60,295 | $376.2K | 0.06% | +23,891+65.6% | Added |
| Ameriprise Financial Inc | 58,504 | $365.1K | 0.00% | −56,541−49.1% | Reduced |
| FJ Capital Management LLC | 57,937 | $361.5K | 0.05% | +57,937 | New |
| State of Wyoming | 55,733 | $347.8K | 0.04% | +26,949+93.6% | Added |
| Empowered Funds, LLC | 54,004 | $337.0K | 0.00% | −60,000−52.6% | Reduced |
| Rhumbline Advisers | 53,481 | $333.7K | 0.00% | −66−0.1% | Reduced |
| Barclays PLC | 49,637 | $309.7K | 0.00% | −7,332−12.9% | Reduced |
| Los Angeles Capital Management LLC | 47,883 | $298.8K | 0.00% | +47,735+32,253.4% | Added |
| Lazard Asset Management LLC | 43,331 | $270.4K | 0.00% | +14,111+48.3% | Added |
| Deutsche Bank AG | 40,359 | $251.8K | 0.00% | +9,769+31.9% | Added |
| Alliancebernstein L.P. | 42,630 | $198.2K | 0.00% | +5,100+13.6% | Added |
| Mariner, LLC | 30,584 | $190.8K | 0.00% | +30,584 | New |
| State of Wisconsin Investment Board | 30,044 | $187.5K | 0.00% | +6,900+29.8% | Added |
| Mercer Global Advisors Inc | 29,288 | $182.8K | 0.00% | +15,784+116.9% | Added |
| Cerity Partners LLC | 26,828 | $167.4K | 0.00% | +26,828 | New |
| Engineers Gate Manager LP | 25,500 | $159.1K | 0.00% | −74,916−74.6% | Reduced |
| MetLife Investment Management | 24,501 | $152.9K | 0.00% | +17,082+230.2% | Added |
| Envestnet Asset Management Inc | 24,244 | $151.3K | 0.00% | +24,244 | New |
| KLCM Advisors, Inc. | 23,900 | $149.1K | 0.01% | 00.0% | Unchanged |
| Group One Trading, L.P. | 22,576 | $140.9K | 0.00% | +10,628+89.0% | Added |
| BNP Paribas Arbitrage, SA | 21,554 | $134.5K | 0.00% | +13,254+159.7% | Added |
| Mraz, Amerine & Associates, Inc. | 21,450 | $133.8K | 0.02% | 00.0% | Unchanged |
| Gator Capital Management, LLC | 20,935 | $130.6K | 0.03% | −500−2.3% | Reduced |
| Millennium Management LLC | 19,610 | $122.4K | 0.00% | −115,478−85.5% | Reduced |
| Impact Capital Partners LLC | 19,516 | $121.8K | 0.03% | +19,516 | New |
| Citigroup Inc | 19,080 | $119.1K | 0.00% | +6,831+55.8% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 19,044 | $118.8K | 0.00% | +771+4.2% | Added |
| Inscription Capital, LLC | 19,037 | $118.8K | 0.01% | +19,037 | New |
| JPMorgan Chase & Co | 18,668 | $118.7K | 0.00% | −249,766−93.0% | Reduced |
| XTX Topco Ltd | 18,657 | $116.4K | 0.00% | −98,254−84.0% | Reduced |
| Metis Global Partners, LLC | 14,334 | $89.4K | 0.00% | 00.0% | Unchanged |
| Wealth Enhancement Advisory Services, LLC | 14,061 | $84.6K | 0.00% | +14,061 | New |
| State Board of Administration of Florida Retirement System | 12,630 | $78.8K | 0.00% | 00.0% | Unchanged |
| Atria Investments LLC | 12,473 | $77.8K | 0.00% | +12,473 | New |
| Manufacturers Life Insurance Company, The | 12,414 | $77.5K | 0.00% | +1,582+14.6% | Added |
| CI Private Wealth, LLC | 12,270 | $76.6K | 0.00% | +12,270 | New |
| D. E. Shaw & Co., Inc. | 12,207 | $76.2K | 0.00% | −657−5.1% | Reduced |
| Ieq Capital, LLC | 12,203 | $76.1K | 0.00% | +12,203 | New |
| Police & Firemen's Retirement System of New Jersey | 11,825 | $73.8K | 0.00% | 00.0% | Unchanged |
| Jump Financial, LLC | 11,644 | $72.7K | 0.00% | −58,954−83.5% | Reduced |
| SG Americas Securities, LLC | 11,203 | $70.0K | 0.00% | −7,614−40.5% | Reduced |
| Crown Wealth Group, LLC | 11,162 | $69.7K | 0.02% | 00.0% | Unchanged |
| McGlone Suttner Wealth Management, Inc. | 10,911 | $68.1K | 0.01% | +10,911 | New |
| Axq Capital, LP | 10,652 | $66.5K | 0.01% | −4,784−31.0% | Reduced |