Octave Specialty GroupOSG

13F holders, Q4 2024 (December 31)
180holders
20new positions
22sold out
7famous investors
$12.59avg. 13F price*

At the end of Q4 2024, 180 institutions reported holding Octave Specialty Group Inc. (OSG) in their 13F filings, unchanged from Q3 2024. 20 opened new positions and 22 sold out. The largest holders were BlackRock, Inc. ($100.7M), Vanguard Group Inc. ($40.7M) and Dimensional Fund Advisors LP ($34.2M). 7 famous investors held it, including Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio), David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).

Company
Octave Specialty Group Inc.
Filed as
AMBAC FINL GROUP INC (Q4 2024)
CUSIP
023139884
Latest filing quarter
Q2 2026

History

Number of 13F holders

050100150200 Q1 2024: 172Q1 2024Q2 2024: 182Q2 2024Q3 2024: 180Q3 2024Q4 2024: 180Q4 2024Q1 2025: 175Q1 2025Q2 2025: 146Q2 2025Q3 2025: 130Q3 2025Q4 2025: 144Q4 2025Q1 2026: 148Q1 2026Q2 2026: 147Q2 2026

Total Exit/New Position Q3 2024 → Q4 2024

InstitutionsTotal Value
New Positions20$26.3M
Exits22$8.5M

All 13F filers, Q3 2024 → Q4 2024: 5,314,524 shares bought and 4,122,372 shares sold, net +1,192,152 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.

Ownership 180 holders

BlackRock, Inc. 0.00% Add +3.2% 7,960,513 $100.7M
Vanguard Group Inc. 0.00% Reduce -21.9% 3,216,048 $40.7M
Dimensional Fund Advisors LP 0.01% Reduce -3.5% 2,706,151 $34.2M
Repertoire Partners LP 58.93% Add +4.7% 2,161,630 $27.3M
State Street Corp. 0.00% Add +8.5% 1,794,042 $22.7M
FMR LLC 0.00% Reduce -6.8% 1,615,030 $20.4M
Goldman Sachs Group Inc. 0.00% Add +71.0% 1,185,700 $15.0M
Geode Capital Management, LLC 0.00% Add +1.7% 1,046,510 $13.2M
Wolf Hill Capital Management, LP 1.02% New 1,000,003 $12.7M
Bain Capital Credit, LP 2.65% No change 1,108,012 $11.9M
American Century Companies Inc. 0.01% Add +3.9% 929,345 $11.8M
Hotchkis & Wiley Capital Management LLC 0.04% Add +12.5% 837,650 $10.6M
Nuveen Asset Management, LLC 0.00% Add +65.5% 824,357 $10.4M
Susquehanna International Group, LLP 0.01% Add +102.3% 754,965 $9.6M
Deutsche Bank AG 0.00% Reduce -2.1% 675,133 $8.5M
Portolan Capital Management, LLC 0.50% New 589,437 $7.5M
Bracebridge Capital, LLC 0.74% No change 579,234 $7.3M
Northern Trust Corp. 0.00% Add +13.4% 536,486 $6.8M
Gendell Jeffrey L 0.21% No change 527,538 $6.7M
Charles Schwab Investment Management Inc. 0.00% Reduce -8.7% 505,126 $6.4M
Morgan Stanley 0.00% Reduce -33.0% 497,955 $6.3M
Western Standard LLC 3.82% Add +64.3% 453,530 $5.7M
D. E. Shaw & Co. 0.01% Reduce -9.3% 431,135 $5.5M
Barclays PLC 0.00% Add +14.3% 429,861 $5.4M
Citadel Advisors 0.00% Reduce -48.0% 379,010 $4.8M
Invesco Ltd. 0.00% Add +18.5% 375,513 $4.8M
Jane Street Group, LLC 0.01% Add +33.0% 316,176 $4.0M
HSBC Holdings PLC 0.00% Reduce -5.1% 312,282 $3.9M
Bank of New York Mellon Corp 0.00% Reduce -21.8% 296,219 $3.7M
Bridgeway Capital Management, LLC 0.08% Add +3.1% 291,633 $3.7M
JPMorgan Chase & Co. 0.00% Add +8.9% 276,762 $3.5M
Caption Management, LLC 0.14% Add +193.5% 272,477 $3.4M
Marshall Wace, LLP 0.00% Reduce -26.8% 266,939 $3.4M
Norges Bank 0.00% No change 263,100 $3.3M
Ameriprise Financial Inc. 0.00% Add +8.6% 235,649 $3.0M
Third Avenue Management LLC 0.56% New 230,416 $2.9M
Principal Financial Group Inc. 0.00% Add +3.0% 229,954 $2.9M
Millennium Management 0.00% Reduce -24.0% 209,592 $2.7M
Harbor Advisors LLC 0.39% No change 196,382 $2.5M
Prescott Group Capital Management, L.L.C. 0.33% No change 194,902 $2.5M
Bank of America Corp. 0.00% Add +166.4% 194,061 $2.5M
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% Add +23.6% 194,034 $2.5M
Public Sector Pension Investment Board 0.01% Add +10.5% 190,804 $2.4M
Empowered Funds, LLC 0.03% Add +5.1% 181,633 $2.3M
Russell Investments Group, Ltd. 0.00% Reduce -32.6% 170,536 $2.2M
Arrowstreet Capital, Limited Partnership 0.00% Reduce -31.9% 167,172 $2.1M
Tudor Investment Corporation 0.02% Reduce -1.2% 164,868 $2.1M
Exchange Traded Concepts, LLC 0.04% Add +4.3% 164,474 $2.1M
Rhumbline Advisers 0.00% Add +6.4% 140,999 $1.8M
Two Sigma Investments, LP 0.00% Add +41.1% 132,295 $1.7M
Renaissance Technologies 0.00% Reduce -57.1% 124,200 $1.6M
Legal & General Group Plc 0.00% Reduce -0.5% 122,939 $1.6M
Squarepoint Ops LLC 0.00% Reduce -52.0% 120,848 $1.5M
HRT Financial LP 0.01% Reduce -26.1% 107,557 $1.4M
Walleye Capital LLC 0.01% Add +449.4% 99,425 $1.3M
Swiss National Bank 0.00% Add +4.6% 93,300 $1.2M
UBS Group AG 0.00% Add +366.4% 89,528 $1.1M
Algert Global LLC 0.03% Add +219.9% 88,469 $1.1M
CANADA LIFE ASSURANCE Co 0.00% No change 77,655 $981K
Verition Fund Management LLC 0.00% Reduce -16.2% 74,335 $940K
Royce & Associates LP 0.01% Add +97.5% 72,934 $923K
Wells Fargo & Company 0.00% Reduce -27.5% 71,421 $903K
Citigroup Inc. 0.00% Add +22.5% 70,618 $893K
VELA Investment Management, LLC 0.27% New 62,584 $792K
BNP Paribas Financial Markets 0.00% Add +93.7% 60,968 $771K
Nebula Research & Development LLC 0.08% Reduce -28.0% 54,177 $685K
Walleye Trading LLC 0.01% Add +118.1% 52,452 $664K
Graham Capital Management, L.P. 0.03% Add +196.6% 51,489 $651K
Caxton Associates LP 0.02% Add +1.6% 48,648 $615K
Prudential Financial Inc. 0.00% Reduce -72.2% 47,670 $603K
Connor, Clark & Lunn Investment Management Ltd. 0.00% New 47,306 $598K
T. Rowe Price Associates Inc. 0.00% Add +17.7% 46,835 $593K
Engineers Gate Manager LP 0.01% Add +168.7% 46,833 $592K
New York State Teachers Retirement System 0.00% No change 44,930 $568K
California State Teachers Retirement System 0.00% Add +3.9% 44,277 $560K
Cubist Systematic Strategies, LLC 0.01% Reduce -89.4% 43,808 $554K
Intech Investment Management LLC 0.01% Add +84.0% 43,629 $552K
Alliancebernstein L.P. 0.00% Add +58.4% 41,240 $522K
Quantbot Technologies LP 0.02% Reduce -19.0% 40,434 $511K
Y-Intercept (Hong Kong) Ltd 0.03% Add +22.8% 38,850 $491K
Thrivent Financial for Lutherans 0.00% Reduce -1.6% 36,671 $464K
HighTower Advisors, LLC 0.00% Reduce -3.2% 35,422 $448K
Centiva Capital, LP 0.02% Reduce -21.9% 35,111 $444K
IMC-Chicago, LLC 0.01% Reduce -3.5% 30,316 $383K
Wolverine Trading, LLC 0.01% New 28,752 $357K
PDT Partners, LLC 0.03% Reduce -55.5% 28,185 $357K
XTX Topco Ltd 0.03% Add +82.4% 28,060 $355K
Sei Investments Co. 0.00% Reduce -0.2% 27,994 $354K
State of Alaska, Department of Revenue 0.00% Reduce -0.6% 26,912 $340K
MetLife Investment Management, LLC 0.00% Add +9.2% 26,838 $340K
Fox Run Management, L.L.C. 0.06% Reduce -49.1% 26,817 $339K
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% Add +8.2% 25,807 $326K
Illinois Municipal Retirement Fund 0.00% Reduce -4.6% 24,988 $316K
Corebridge Financial, Inc. 0.00% Reduce -3.0% 24,304 $307K
Ensign Peak Advisors, Inc 0.00% No change 24,133 $305K
Louisiana State Employees Retirement System 0.01% No change 22,900 $290K
Cresset Asset Management, LLC 0.00% Reduce -8.5% 22,563 $285K
Amundi 0.00% Add +224.4% 24,217 $281K
Gator Capital Management, LLC 0.10% Reduce -70.4% 21,435 $271K
Creative Planning 0.00% Add +52.5% 21,210 $268K
Two Sigma Advisers, LP 0.00% New 21,100 $267K
Janus Henderson Group PLC 0.00% No change 19,792 $250K
Oxford Asset Management LLP 0.11% New 18,317 $232K
Yousif Capital Management, LLC 0.00% Reduce -0.9% 18,075 $229K
AQR Capital Management 0.00% Add +16.9% 17,837 $226K
Manufacturers Life Insurance Company, The 0.00% Reduce -2.8% 16,351 $207K
Comerica Bank 0.00% Reduce -3.2% 16,296 $206K
Group One Trading LLC 0.01% Add +65.1% 16,116 $204K
Maryland State Retirement & Pension System 0.00% New 15,927 $201K
Mraz, Amerine & Associates, Inc. 0.03% Reduce -4.5% 14,900 $188K
Voya Investment Management LLC 0.00% Reduce -61.6% 14,115 $179K
KLCM Advisors, Inc. 0.02% No change 14,000 $177K
Amalgamated Bank 0.00% Add +5.1% 13,940 $176K
Arizona State Retirement System 0.00% Add +5.7% 13,768 $174K
ProShare Advisors LLC 0.00% New 13,756 $174K
Freestone Grove Partners LP 0.00% — 13,494 $171K
State Board of Administration of Florida Retirement System 0.00% No change 12,630 $160K
Franklin Resources Inc. 0.00% Reduce -51.7% 12,477 $158K
KLP Kapitalforvaltning As 0.00% — 12,400 $157K
Bank of Montreal 0.00% Add +19.5% 12,357 $156K
Teachers Retirement System of the State of Kentucky 0.00% No change 12,301 $155K
Axq Capital, LP 0.07% New 12,112 $153K
Aigen Investment Management, LP 0.03% New 11,539 $146K
Oregon Public Employees Retirement Fund 0.00% No change 11,198 $142K
State of Tennessee, Department of Treasury 0.00% Reduce -4.2% 11,095 $140K
Cornerstone Investment Partners, LLC 0.01% Add +0.1% 10,323 $131K
Commonwealth of Pennsylvania Public School Empls Retrmt SYS 0.00% Reduce -0.1% 10,128 $128K
Bayesian Capital Management, LP 0.02% New 10,076 $127K
New York State Common Retirement Fund 0.00% No change 10,073 $127K
Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% No change 9,826 $124K
Police & Firemen's Retirement System of New Jersey 0.00% — 9,202 $116K
Aquatic Capital Management LLC 0.00% New 8,330 $105K
Point72 Asset Management 0.00% New 7,300 $92K
Royal Bank of Canada 0.00% Reduce -77.7% 5,987 $76K
Point72 (DIFC) Ltd 0.01% Add +39.2% 5,693 $72K
Ameritas Investment Partners, Inc. 0.00% No change 4,583 $58K
Tower Research Capital LLC (TRC) 0.00% Reduce -72.0% 2,682 $34K
Corient Private Wealth LP 0.00% Add +0.0% 28,220 $34K
State of Wyoming 0.00% Reduce -89.6% 2,592 $33K
PNC Financial Services Group, Inc. 0.00% Add +2.0% 1,663 $21K
GAMMA Investing LLC 0.00% Add +159.2% 1,529 $19K
Sterling Capital Management LLC 0.00% Reduce -74.9% 1,390 $18K
Public Employees Retirement System of Ohio 0.00% New 1,257 $16K
Harbor Capital Advisors, Inc. 0.00% Add +19.3% 991 $13K
Nisa Investment Advisors, LLC 0.00% Reduce -0.4% 1,001 $13K
US Bancorp \de 0.00% Reduce -8.6% 691 $9K
Lindbrook Capital, LLC 0.00% Add +7.3% 633 $8K
Osaic Holdings, Inc. 0.00% Add +6.7% 593 $7K
Wiser Advisor Group LLC 0.01% No change 500 $6K
Bessemer Group Inc. 0.00% No change 442 $6K
Smartleaf Asset Management LLC 0.00% Add +57.8% 467 $6K
Barrow Hanley Mewhinney & Strauss LLC 0.00% Add +997.6% 450 $6K
Fifth Third Bancorp 0.00% No change 429 $5K
Venturi Wealth Management, LLC 0.00% No change 375 $5K
Brooklyn Investment Group 0.00% New 352 $4K
Capital Analysts, LLC 0.00% No change 325 $4K
Cwm, LLC 0.00% Add +217.1% 333 $4K
Pinnacle Holdings, LLC 0.00% No change 186 $2K
Red Tortoise LLC 0.00% No change 180 $2K
DiNuzzo Private Wealth, Inc. 0.00% No change 177 $2K
Huntington National Bank 0.00% Reduce -58.5% 158 $2K
Assetmark, Inc. 0.00% Reduce -7.6% 158 $2K
Hexagon Capital Partners LLC 0.00% New 153 $2K
MassMutual Private Wealth & Trust, FSB 0.00% Add +162.1% 152 $2K
Quadrant Capital Group LLC 0.00% Add +45.5% 147 $2K
Rothschild Investment LLC 0.00% Add +54.4% 142 $2K
Point72 Asia (Singapore) Pte. Ltd. 0.00% Reduce -91.0% 129 $2K
Farther Finance Advisors, LLC 0.00% No change 89 $1K
Covestor Ltd 0.00% Add +19.1% 112 $1K
Capital Advisors, Ltd. LLC 0.00% Add +38.2% 76 $1K
Parallel Advisors, LLC 0.00% Reduce -27.4% 61 $772
Farmers & Merchants Investments Inc. 0.00% No change 31 $392
Legacy Investment Solutions, LLC 0.00% No change 25 $287
Legacy Wealth Managment, LLC 0.00% No change 25 $287
Versant Capital Management, Inc 0.00% No change 19 $240
Allworth Financial LP 0.00% No change 19 $215
Principal Securities, Inc. 0.00% New 16 $202
UMB Bank, n.a. 0.00% No change 15 $190
SBI Securities Co., Ltd. 0.00% — 10 $127
NewEdge Advisors, LLC 0.00% No change 5 $63

"% of holder's portfolio" is OSG's weight in each manager's 13F, not the share of Octave Specialty Group Inc. the manager owns.