Octave Specialty GroupOSG
13F holders, Q1 2025 (March 31)175holders −5
32new positions
37sold out
6famous investors
$8.72avg. 13F price*
At the end of Q1 2025, 175 institutions reported holding Octave Specialty Group Inc. (OSG) in their 13F filings, down 5 from Q4 2024. 32 opened new positions and 37 sold out. The largest holders were BlackRock, Inc. ($42.8M), Vanguard Group Inc. ($23.3M) and Dimensional Fund Advisors LP ($22.4M). 6 famous investors held it, including Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio), Ken Griffin (0.0% of Citadel Advisors's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Octave Specialty Group Inc.
- Filed as
- AMBAC FINL GROUP INC (Q1 2025)
- CUSIP
- 023139884
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2024 → Q1 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 32 | $14.7M |
| Exits | 37 | $20.8M |
All 13F filers, Q4 2024 → Q1 2025: 6,920,292 shares bought and 10,351,965 shares sold, net −3,431,673 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 175 holders
| BlackRock, Inc. | 0.00% | Reduce -38.5% | 4,894,680 | $42.8M |
| Vanguard Group Inc. | 0.00% | Reduce -17.3% | 2,660,882 | $23.3M |
| Dimensional Fund Advisors LP | 0.01% | Reduce -5.5% | 2,556,880 | $22.4M |
| FMR LLC | 0.00% | Reduce -4.9% | 1,535,671 | $13.4M |
| Susquehanna International Group, LLP | 0.02% | Add +56.4% | 1,180,557 | $10.3M |
| Repertoire Partners LP | 66.64% | Reduce -45.7% | 1,173,874 | $10.3M |
| Citadel Advisors | 0.01% | Add +190.9% | 1,102,722 | $9.6M |
| Geode Capital Management, LLC | 0.00% | Add +4.6% | 1,094,946 | $9.6M |
| State Street Corp. | 0.00% | Reduce -42.5% | 1,032,294 | $9.0M |
| Bain Capital Credit, LP | 2.13% | No change | 1,108,012 | $8.7M |
| Morgan Stanley | 0.00% | Add +72.3% | 858,040 | $7.5M |
| American Century Companies Inc. | 0.00% | Reduce -7.9% | 856,261 | $7.5M |
| Jane Street Group, LLC | 0.01% | Add +129.0% | 724,094 | $6.3M |
| Deutsche Bank AG | 0.00% | Add +7.1% | 723,250 | $6.3M |
| Western Standard LLC | 3.60% | Add +54.2% | 699,352 | $6.1M |
| Wolf Hill Capital Management, LP | 0.55% | Reduce -30.7% | 693,444 | $6.1M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -42.6% | 680,179 | $6.0M |
| Gendell Jeffrey L | 0.23% | Add +14.2% | 602,286 | $5.3M |
| Bracebridge Capital, LLC | 3.51% | No change | 579,234 | $5.1M |
| Hotchkis & Wiley Capital Management LLC | 0.02% | Reduce -33.4% | 557,680 | $4.9M |
| Schonfeld Strategic Advisors LLC | 0.03% | New | 522,484 | $4.6M |
| Millennium Management | 0.00% | Add +142.7% | 508,686 | $4.5M |
| Barclays PLC | 0.00% | Add +13.9% | 489,746 | $4.3M |
| Northern Trust Corp. | 0.00% | Reduce -14.0% | 461,256 | $4.0M |
| Prescott Group Capital Management, L.L.C. | 0.56% | Add +127.0% | 442,364 | $3.9M |
| D. E. Shaw & Co. | 0.00% | Reduce -4.6% | 411,470 | $3.6M |
| HRT Financial LP | 0.02% | Add +273.1% | 401,272 | $3.5M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -25.0% | 378,764 | $3.3M |
| Third Avenue Management LLC | 0.64% | Add +59.0% | 366,461 | $3.2M |
| Caption Management, LLC | 0.15% | Add +33.3% | 363,082 | $3.2M |
| Group One Trading LLC | 0.12% | Add +2018.8% | 341,468 | $3.0M |
| Bridgeway Capital Management, LLC | 0.07% | Add +4.6% | 305,127 | $2.7M |
| Walleye Trading LLC | 0.07% | Add +467.2% | 297,498 | $2.6M |
| Nuveen, LLC | 0.00% | — | 282,657 | $2.5M |
| Tudor Investment Corporation | 0.02% | Add +67.9% | 276,829 | $2.4M |
| Norges Bank | 0.00% | No change | 263,100 | $2.3M |
| Squarepoint Ops LLC | 0.01% | Add +92.3% | 232,383 | $2.0M |
| HSBC Holdings PLC | 0.00% | Reduce -31.0% | 215,435 | $1.9M |
| Marshall Wace, LLP | 0.00% | Reduce -23.1% | 205,405 | $1.8M |
| Harbor Advisors LLC | 0.30% | No change | 196,382 | $1.7M |
| Empowered Funds, LLC | 0.02% | Add +7.4% | 195,127 | $1.7M |
| Bank of America Corp. | 0.00% | Reduce -5.4% | 183,638 | $1.6M |
| Invesco Ltd. | 0.00% | Reduce -51.9% | 180,495 | $1.6M |
| Renaissance Technologies | 0.00% | Add +38.1% | 171,500 | $1.5M |
| Cubist Systematic Strategies, LLC | 0.02% | Add +289.5% | 170,643 | $1.5M |
| Trexquant Investment LP | 0.02% | New | 161,096 | $1.4M |
| Y-Intercept (Hong Kong) Ltd | 0.09% | Add +276.9% | 146,446 | $1.3M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Reduce -12.7% | 145,901 | $1.3M |
| Bank of New York Mellon Corp | 0.00% | Reduce -51.4% | 144,073 | $1.3M |
| UBS Group AG | 0.00% | Add +58.5% | 141,931 | $1.2M |
| Simplex Trading, LLC | 0.04% | New | 130,671 | $1.1M |
| Engineers Gate Manager LP | 0.02% | Add +176.6% | 129,515 | $1.1M |
| Two Sigma Investments, LP | 0.00% | Reduce -5.0% | 125,663 | $1.1M |
| XTX Topco Ltd | 0.05% | Add +326.3% | 119,607 | $1.0M |
| Balyasny Asset Management L.P. | 0.00% | New | 118,765 | $1.0M |
| Occudo Quantitative Strategies LP | 0.13% | New | 114,575 | $991K |
| Quantbot Technologies LP | 0.03% | Add +148.1% | 100,308 | $878K |
| Wolverine Trading, LLC | 0.03% | Add +251.5% | 101,058 | $874K |
| Ameriprise Financial Inc. | 0.00% | Reduce -57.8% | 99,552 | $871K |
| IMC-Chicago, LLC | 0.03% | Add +212.7% | 94,803 | $830K |
| ExodusPoint Capital Management, LP | 0.01% | New | 93,039 | $814K |
| VELA Investment Management, LLC | 0.28% | Add +47.7% | 92,412 | $809K |
| Swiss National Bank | 0.00% | Reduce -1.5% | 91,900 | $804K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -54.0% | 89,256 | $781K |
| Dark Forest Capital Management LP | 0.03% | New | 77,234 | $676K |
| Brevan Howard Capital Management LP | 0.02% | New | 74,331 | $650K |
| Nebula Research & Development LLC | 0.06% | Add +34.9% | 73,102 | $640K |
| Public Sector Pension Investment Board | 0.00% | Reduce -62.3% | 72,000 | $630K |
| Wells Fargo & Company | 0.00% | Reduce -0.1% | 71,321 | $624K |
| Rhumbline Advisers | 0.00% | Reduce -50.7% | 69,540 | $608K |
| Royce & Associates LP | 0.01% | Reduce -9.3% | 66,122 | $579K |
| Caxton Associates LLP | 0.02% | — | 65,647 | $574K |
| Dynamic Technology Lab Private Ltd | 0.08% | New | 64,233 | $562K |
| JPMorgan Chase & Co. | 0.00% | Reduce -77.1% | 63,419 | $555K |
| Algert Global LLC | 0.01% | Reduce -29.1% | 62,719 | $549K |
| T. Rowe Price Associates Inc. | 0.00% | Add +4.3% | 48,873 | $428K |
| Citigroup Inc. | 0.00% | Reduce -31.4% | 48,416 | $424K |
| Fox Run Management, L.L.C. | 0.06% | Add +68.4% | 45,171 | $395K |
| Point72 Asia (Singapore) Pte. Ltd. | 0.10% | Add +34853.5% | 45,090 | $395K |
| California State Teachers Retirement System | 0.00% | No change | 44,277 | $387K |
| Legal & General Group Plc | 0.00% | Reduce -64.6% | 43,542 | $381K |
| Oxford Asset Management LLP | 0.17% | Add +130.0% | 42,123 | $369K |
| HAP Trading, LLC | 0.13% | New | 41,939 | $367K |
| Verition Fund Management LLC | 0.00% | Reduce -47.0% | 39,381 | $345K |
| Intech Investment Management LLC | 0.00% | Reduce -14.9% | 37,138 | $325K |
| Jain Global LLC | 0.01% | New | 36,672 | $321K |
| SG Americas Securities, LLC | 0.00% | New | 36,196 | $317K |
| CANADA LIFE ASSURANCE Co | 0.00% | Reduce -55.9% | 34,226 | $300K |
| Point72 Asset Management | 0.00% | Add +353.4% | 33,100 | $290K |
| Two Sigma Advisers, LP | 0.00% | Add +53.1% | 32,300 | $283K |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -34.0% | 31,199 | $273K |
| Alliancebernstein L.P. | 0.00% | Reduce -32.5% | 27,840 | $244K |
| Axq Capital, LP | 0.10% | Add +129.1% | 27,745 | $243K |
| Magnetar Financial LLC | 0.00% | New | 27,188 | $238K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +4.5% | 26,977 | $236K |
| Freestone Grove Partners LP | 0.00% | Add +90.9% | 25,759 | $225K |
| Ensign Peak Advisors, Inc | 0.00% | No change | 24,133 | $211K |
| KLCM Advisors, Inc. | 0.02% | Add +71.4% | 24,000 | $210K |
| MetLife Investment Management, LLC | 0.00% | Reduce -12.3% | 23,542 | $206K |
| Quantessence Capital LLC | 0.05% | New | 23,500 | $206K |
"% of holder's portfolio" is OSG's weight in each manager's 13F, not the share of Octave Specialty Group Inc. the manager owns.