Octave Specialty GroupOSG
13F holders, Q4 2025 (December 31)144holders +14
28new positions
15sold out
6famous investors
$7.78avg. 13F price*
At the end of Q4 2025, 144 institutions reported holding Octave Specialty Group Inc. (OSG) in their 13F filings, up 14 from Q3 2025. 28 opened new positions and 15 sold out. The largest holders were BlackRock, Inc. ($34.9M), Vanguard Group Inc. ($19.5M) and Western Standard LLC ($19.5M). 6 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and Steve Cohen (0.0% of Point72 Asset Management's portfolio).
- Company
- Octave Specialty Group Inc.
- CUSIP
- 023139884
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 28 | $13.7M |
| Exits | 15 | $24.8M |
All 13F filers, Q3 2025 → Q4 2025: 6,110,205 shares bought and 9,115,010 shares sold, net −3,004,805 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 144 holders
| BlackRock, Inc. | 0.00% | Reduce -0.1% | 4,488,468 | $34.9M |
| Vanguard Group Inc. | 0.00% | Reduce -1.8% | 2,508,395 | $19.5M |
| Western Standard LLC | 8.99% | Reduce -5.2% | 2,504,627 | $19.5M |
| Wolf Hill Capital Management, LP | 1.71% | Add +63.1% | 1,888,973 | $14.7M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -21.3% | 1,685,627 | $13.1M |
| Gendell Jeffrey L | 0.21% | Reduce -15.8% | 1,569,472 | $12.2M |
| Jane Street Group, LLC | 0.01% | Add +79.1% | 1,520,654 | $11.8M |
| Bain Capital Credit, LP | 2.25% | No change | 1,108,012 | $8.6M |
| Caption Management, LLC | 0.38% | Reduce -4.5% | 1,071,094 | $8.3M |
| Geode Capital Management, LLC | 0.00% | Reduce -3.4% | 1,024,547 | $8.0M |
| State Street Corp. | 0.00% | Reduce -2.5% | 943,368 | $7.3M |
| Morgan Stanley | 0.00% | Add +383.6% | 938,712 | $7.3M |
| Prescott Group Capital Management, L.L.C. | 0.65% | Reduce -0.3% | 893,517 | $7.0M |
| Nuveen, LLC | 0.00% | Reduce -24.9% | 810,279 | $6.3M |
| Third Avenue Management LLC | 1.11% | Add +29.6% | 782,093 | $6.1M |
| Goldman Sachs Group Inc. | 0.00% | Add +48.6% | 779,975 | $6.1M |
| Marshall Wace, LLP | 0.01% | Add +64.5% | 748,572 | $5.8M |
| Barclays PLC | 0.00% | Add +1.6% | 680,441 | $5.3M |
| Bracebridge Capital, LLC | 1.67% | No change | 579,234 | $4.5M |
| Susquehanna International Group, LLP | 0.01% | Add +92.0% | 526,588 | $4.1M |
| Essex Investment Management Co. LLC | 0.49% | New | 410,822 | $3.2M |
| SG Americas Securities, LLC | 0.00% | Add +434.7% | 403,237 | $3.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -5.5% | 361,424 | $2.8M |
| Russell Investments Group, Ltd. | 0.00% | Add +6943.5% | 346,258 | $2.7M |
| Bank of America Corp. | 0.00% | Add +62.8% | 330,901 | $2.6M |
| Northern Trust Corp. | 0.00% | Reduce -10.7% | 323,146 | $2.5M |
| Millennium Management | 0.00% | Reduce -56.7% | 303,282 | $2.4M |
| Citadel Advisors | 0.00% | Add +67.5% | 287,283 | $2.2M |
| Bridgeway Capital Management, LLC | 0.04% | Reduce -23.2% | 245,387 | $1.9M |
| Jacobs Levy Equity Management, Inc. | 0.01% | New | 237,185 | $1.8M |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | 0.23% | No change | 203,011 | $1.6M |
| Harbor Advisors LLC | 0.23% | No change | 196,382 | $1.5M |
| VELA Investment Management, LLC | 0.38% | Reduce -0.7% | 178,752 | $1.4M |
| Schonfeld Strategic Advisors LLC | 0.01% | Reduce -69.0% | 169,824 | $1.3M |
| Invesco Ltd. | 0.00% | Reduce -4.6% | 156,504 | $1.2M |
| UBS Group AG | 0.00% | Reduce -45.0% | 153,864 | $1.2M |
| JPMorgan Chase & Co. | 0.00% | Add +341.9% | 152,695 | $1.2M |
| Bank of New York Mellon Corp | 0.00% | Reduce -0.4% | 138,173 | $1.1M |
| Legato Capital Management LLC | 0.09% | New | 132,620 | $1.0M |
| American Century Companies Inc. | 0.00% | Reduce -6.8% | 123,599 | $962K |
| HRT Financial LP | 0.00% | New | 111,702 | $869K |
| ExodusPoint Capital Management, LP | 0.01% | Add +675.2% | 109,765 | $854K |
| Cruiser Capital Advisors, LLC | 0.71% | Reduce -4.2% | 107,140 | $834K |
| Point72 Asset Management | 0.00% | New | 103,544 | $806K |
| HSBC Holdings PLC | 0.00% | Reduce -11.2% | 92,040 | $713K |
| Walleye Capital LLC | 0.00% | New | 88,284 | $687K |
| BNP Paribas Financial Markets | 0.00% | Reduce -2.7% | 86,734 | $675K |
| Wells Fargo & Company | 0.00% | Add +16.1% | 85,734 | $667K |
| Jump Financial, LLC | 0.01% | New | 85,213 | $663K |
| Engineers Gate Manager LP | 0.01% | New | 81,585 | $635K |
| Quantinno Capital Management LP | 0.00% | Add +95.0% | 78,678 | $612K |
| Norges Bank | 0.00% | — | 75,000 | $584K |
| T. Rowe Price Associates Inc. | 0.00% | No change | 70,941 | $552K |
| AQR Capital Management | 0.00% | Reduce -15.1% | 70,128 | $546K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -34.8% | 68,773 | $535K |
| Creative Planning | 0.00% | Reduce -24.1% | 68,537 | $533K |
| Sei Investments Co. | 0.00% | New | 66,718 | $519K |
| Diametric Capital, LP | 0.14% | Add +2.9% | 66,478 | $517K |
| Caxton Associates LLP | 0.01% | No change | 65,647 | $511K |
| DLD Asset Management, LP | 0.16% | Reduce -23.8% | 60,421 | $470K |
| Rhumbline Advisers | 0.00% | Reduce -14.4% | 57,471 | $447K |
| Prudential Financial Inc. | 0.00% | Reduce -4.0% | 54,340 | $423K |
| Calamos Advisors LLC | 0.00% | New | 49,089 | $382K |
| Two Sigma Investments, LP | 0.00% | New | 45,044 | $350K |
| D. E. Shaw & Co. | 0.00% | Reduce -62.8% | 44,126 | $343K |
| Y-Intercept (Hong Kong) Ltd | 0.01% | Reduce -70.9% | 43,781 | $341K |
| Balyasny Asset Management L.P. | 0.00% | Reduce -47.2% | 42,917 | $334K |
| Fox Run Management, L.L.C. | 0.05% | New | 42,354 | $330K |
| Axq Capital, LP | 0.07% | New | 40,374 | $314K |
| Alliancebernstein L.P. | 0.00% | No change | 37,530 | $292K |
| XTX Topco Ltd | 0.01% | New | 31,058 | $242K |
| PEAK6 LLC | 0.01% | New | 30,478 | $237K |
| IMC-Chicago, LLC | 0.00% | Reduce -73.0% | 26,303 | $205K |
| Deutsche Bank AG | 0.00% | Reduce -95.2% | 25,647 | $200K |
| Oxford Asset Management LLP | 0.07% | New | 25,413 | $198K |
| Renaissance Technologies | 0.00% | Reduce -71.8% | 25,158 | $196K |
| Metis Global Partners, LLC | 0.00% | New | 25,136 | $196K |
| KLCM Advisors, Inc. | 0.02% | Reduce -0.4% | 23,900 | $186K |
| CIBC Asset Management Inc | 0.00% | New | 23,893 | $186K |
| Aquatic Capital Management LLC | 0.01% | Add +83.3% | 23,067 | $179K |
| Acadian Asset Management LLC | 0.00% | New | 23,053 | $179K |
| Quadrature Capital Ltd | 0.00% | New | 21,219 | $165K |
| Intech Investment Management LLC | 0.00% | Reduce -6.6% | 21,038 | $164K |
| Brevan Howard Capital Management LP | 0.00% | Reduce -40.7% | 21,033 | $164K |
| MetLife Investment Management, LLC | 0.00% | Add +8.7% | 19,956 | $155K |
| Virtu Financial LLC | 0.01% | New | 19,235 | $150K |
| State of Wyoming | 0.02% | Add +643.5% | 19,249 | $150K |
| Quantbot Technologies LP | 0.01% | New | 19,241 | $150K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -4.5% | 19,152 | $149K |
| Mraz, Amerine & Associates, Inc. | 0.02% | Add +3.8% | 18,950 | $147K |
| Verition Fund Management LLC | 0.00% | Reduce -14.8% | 17,500 | $136K |
| Quarry LP | 0.02% | Reduce -41.9% | 15,103 | $118K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 12,630 | $98K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -99.0% | 12,594 | $98K |
| nVerses Capital, LLC | 0.21% | — | 12,181 | $95K |
| Franklin Resources Inc. | 0.00% | Reduce -30.0% | 11,959 | $93K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 11,825 | $92K |
| Cerity Partners LLC | 0.00% | Reduce -1.4% | 11,332 | $88K |
| Voleon Capital Management LP | 0.00% | New | 11,204 | $87K |
| Crown Wealth Group, LLC | 0.02% | New | 11,162 | $87K |
"% of holder's portfolio" is OSG's weight in each manager's 13F, not the share of Octave Specialty Group Inc. the manager owns.