Octave Specialty GroupOSG
13F holders, Q1 2026 (March 31)148holders +4
35new positions
32sold out
7famous investors
$4.65avg. 13F price*
At the end of Q1 2026, 148 institutions reported holding Octave Specialty Group Inc. (OSG) in their 13F filings, up 4 from Q4 2025. 35 opened new positions and 32 sold out. The largest holders were BlackRock, Inc. ($18.2M), Western Standard LLC ($10.5M) and Vanguard Capital Management LLC ($9.0M). 7 famous investors held it, including Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Octave Specialty Group Inc.
- CUSIP
- 023139884
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 35 | $9.7M |
| Exits | 32 | $9.1M |
All 13F filers, Q4 2025 → Q1 2026: 5,313,025 shares bought and 7,419,050 shares sold, net −2,106,025 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 148 holders
| BlackRock, Inc. | 0.00% | Reduce -12.7% | 3,917,798 | $18.2M |
| Western Standard LLC | 5.50% | Reduce -10.3% | 2,247,591 | $10.5M |
| Vanguard Capital Management LLC | 0.00% | — | 1,945,076 | $9.0M |
| Prescott Group Capital Management, L.L.C. | 0.74% | Add +78.2% | 1,592,587 | $7.4M |
| Wolf Hill Capital Management, LP | 0.97% | Reduce -22.2% | 1,470,334 | $6.8M |
| Gendell Jeffrey L | 0.09% | Reduce -10.0% | 1,413,212 | $6.6M |
| Third Avenue Management LLC | 1.01% | Add +71.5% | 1,341,211 | $6.2M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -22.3% | 1,310,132 | $6.1M |
| Bain Capital Credit, LP | 1.70% | No change | 1,108,012 | $5.2M |
| Marshall Wace, LLP | 0.01% | Add +42.3% | 1,065,335 | $5.0M |
| Geode Capital Management, LLC | 0.00% | Reduce -0.2% | 1,022,438 | $4.8M |
| State Street Corp. | 0.00% | Reduce -0.2% | 941,404 | $4.4M |
| Jacobs Levy Equity Management, Inc. | 0.02% | Add +272.8% | 884,272 | $4.1M |
| Nuveen, LLC | 0.00% | Reduce -1.2% | 800,253 | $3.7M |
| Jane Street Group, LLC | 0.00% | Reduce -49.7% | 764,384 | $3.6M |
| Caption Management, LLC | 0.15% | Reduce -40.0% | 642,597 | $3.0M |
| Bracebridge Capital, LLC | 0.49% | No change | 579,234 | $2.7M |
| RIHO Partners, LLC | 1.60% | New | 546,569 | $2.5M |
| Citadel Advisors | 0.00% | Add +50.3% | 431,809 | $2.0M |
| Essex Investment Management Co. LLC | 0.31% | Add +1.8% | 418,203 | $1.9M |
| Susquehanna International Group, LLP | 0.00% | Reduce -25.9% | 390,193 | $1.8M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -55.6% | 346,293 | $1.6M |
| IPG Investment Advisors LLC | 0.26% | New | 325,616 | $1.5M |
| Brooklyn Investment Group | 0.05% | New | 325,351 | $1.5M |
| Northern Trust Corp. | 0.00% | Reduce -0.3% | 322,348 | $1.5M |
| Vanguard Portfolio Management LLC | 0.00% | — | 295,900 | $1.4M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -18.3% | 295,344 | $1.4M |
| Vanguard Fiduciary Trust Co. | 0.00% | — | 274,562 | $1.3M |
| JPMorgan Chase & Co. | 0.00% | Add +75.8% | 268,434 | $1.2M |
| UBS Group AG | 0.00% | Add +71.8% | 264,280 | $1.2M |
| Bank of America Corp. | 0.00% | Reduce -22.6% | 256,110 | $1.2M |
| Morgan Stanley | 0.00% | Reduce -74.9% | 235,246 | $1.1M |
| Renaissance Technologies | 0.00% | Add +805.2% | 227,726 | $1.1M |
| Harbor Advisors LLC | 0.13% | No change | 196,382 | $913K |
| Bridgeway Capital Management, LLC | 0.02% | Reduce -25.6% | 182,504 | $849K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -47.6% | 181,271 | $843K |
| Tudor Investment Corporation | 0.00% | New | 159,963 | $744K |
| Sei Investments Co. | 0.00% | Add +133.9% | 156,078 | $726K |
| Invesco Ltd. | 0.00% | Reduce -3.5% | 151,042 | $702K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Add +109.8% | 144,301 | $671K |
| Arrowpoint Investment Partners (Singapore) Pte. Ltd. | 0.96% | Reduce -31.4% | 139,168 | $647K |
| Millennium Management | 0.00% | Reduce -55.5% | 135,088 | $628K |
| Legato Capital Management LLC | 0.06% | Reduce -1.4% | 130,760 | $608K |
| Bank of New York Mellon Corp | 0.00% | Reduce -5.6% | 130,471 | $607K |
| American Century Companies Inc. | 0.00% | Reduce -2.5% | 120,540 | $561K |
| XTX Topco Ltd | 0.01% | Add +276.4% | 116,911 | $544K |
| Ameriprise Financial Inc. | 0.00% | New | 115,045 | $535K |
| Empowered Funds, LLC | 0.00% | New | 114,004 | $530K |
| Point72 Asset Management | 0.00% | Add +9.8% | 113,656 | $529K |
| Cruiser Capital Advisors, LLC | 0.20% | Add +1.6% | 108,798 | $506K |
| HSBC Holdings PLC | 0.00% | Add +11.3% | 102,430 | $476K |
| T. Rowe Price Associates Inc. | 0.00% | Add +43.7% | 101,965 | $475K |
| Engineers Gate Manager LP | 0.01% | Add +23.1% | 100,416 | $467K |
| Squarepoint Ops LLC | 0.00% | New | 76,907 | $358K |
| Jump Financial, LLC | 0.01% | Reduce -17.1% | 70,598 | $328K |
| Prudential Financial Inc. | 0.00% | Add +29.0% | 70,110 | $326K |
| Public Employees Retirement System of Ohio | 0.00% | New | 68,805 | $320K |
| Walleye Capital LLC | 0.00% | Reduce -24.0% | 67,134 | $312K |
| Alliancebernstein L.P. | 0.00% | No change | 37,530 | $292K |
| Barclays PLC | 0.00% | Reduce -91.6% | 56,969 | $265K |
| Wells Fargo & Company | 0.00% | Reduce -35.5% | 55,324 | $257K |
| Rhumbline Advisers | 0.00% | Reduce -6.8% | 53,547 | $249K |
| HRT Financial LP | 0.00% | Reduce -54.4% | 50,974 | $237K |
| AQR Capital Management | 0.00% | Reduce -28.9% | 49,828 | $232K |
| Quantinno Capital Management LP | 0.00% | Reduce -38.1% | 48,700 | $226K |
| Acadian Asset Management LLC | 0.00% | Add +86.2% | 42,930 | $199K |
| Quantbot Technologies LP | 0.01% | Add +101.2% | 38,708 | $180K |
| GWN Securities Inc. | 0.03% | New | 36,404 | $169K |
| Deutsche Bank AG | 0.00% | Add +19.3% | 30,590 | $142K |
| Lazard Asset Management LLC | 0.00% | New | 29,220 | $136K |
| Commonwealth Financial Services, LLC | 0.02% | New | 29,008 | $135K |
| State of Wyoming | 0.02% | Add +49.5% | 28,784 | $134K |
| Raymond James Financial Inc. | 0.00% | New | 25,656 | $119K |
| KLCM Advisors, Inc. | 0.01% | No change | 23,900 | $111K |
| CIBC Asset Management Inc | 0.00% | No change | 23,893 | $111K |
| Empirical Asset Management, LLC | 0.03% | New | 23,440 | $109K |
| State of Wisconsin Investment Board | 0.00% | New | 23,144 | $108K |
| Mraz, Amerine & Associates, Inc. | 0.01% | Add +13.2% | 21,450 | $100K |
| Gator Capital Management, LLC | 0.02% | New | 21,435 | $100K |
| Park Capital Management, LLC / WI | 0.10% | New | 21,262 | $99K |
| SG Americas Securities, LLC | 0.00% | Reduce -95.3% | 18,817 | $87K |
| Vanguard Global Advisers, LLC | 0.00% | — | 18,651 | $87K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -4.6% | 18,273 | $85K |
| Brevan Howard Capital Management LP | 0.00% | Reduce -13.5% | 18,197 | $85K |
| Quotient Wealth Partners, LLC | 0.00% | New | 16,896 | $79K |
| Anchyra Partners LLC | 0.02% | New | 16,328 | $76K |
| Centiva Capital, LP | 0.00% | New | 16,085 | $75K |
| Axq Capital, LP | 0.01% | Reduce -61.8% | 15,436 | $72K |
| Able Wealth Management LLC | 0.02% | New | 15,246 | $71K |
| Daymark Wealth Partners, LLC | 0.00% | New | 14,596 | $68K |
| Metis Global Partners, LLC | 0.00% | Reduce -43.0% | 14,334 | $67K |
| Mercer Global Advisors Inc. | 0.00% | New | 13,504 | $63K |
| Verition Fund Management LLC | 0.00% | Reduce -22.9% | 13,500 | $63K |
| Aire Advisors, LLC | 0.01% | New | 13,446 | $63K |
| Graham Capital Management, L.P. | 0.00% | New | 13,053 | $61K |
| D. E. Shaw & Co. | 0.00% | Reduce -70.8% | 12,864 | $60K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 12,630 | $59K |
| Citigroup Inc. | 0.00% | Add +72.6% | 12,249 | $57K |
| Group One Trading LLC | 0.00% | New | 11,948 | $56K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 11,825 | $55K |
"% of holder's portfolio" is OSG's weight in each manager's 13F, not the share of Octave Specialty Group Inc. the manager owns.