Ambac Financial Group Inc

-

Stock Issuer and Owners

Home | Sign Up | Log In
New Features
Latest Fund Raises
Related People
Fund Service Providers
Startup & Company Raises
List of Funds
Boston Firms
Boston Hedge Funds
Cornell Alumni Firms
CalPERS Portfolio
NYSCRF Portfolio
User Guide
Regulatory AUM vs AUM
LP Portfolios
Related Firms
Build a Portfolio
Comprehensive Search
Keyboard
Ambac Financial Group Inc
TickerOSG
CIK #0000874501
CUSIP69036R301
SectorFinance - Surety Insurance
AddressOne State St Plz, New York, NY 10004
Source [EDGAR]
CIK Filing 2011 - 2026
[0000874501] 10-K
[0000874501] 10-Q
[0000874501] 3
[0000874501] 4
[0000874501] 8-K
[0000874501] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Western Standard LLC Octave Specialty Group Inc [2026-02-12] 0.0
Jane Street Group LLC Octave Specialty Group Inc [2026-02-11] 0.0
Susquehanna Securities LLC Ambac Financial Group Inc [2025-08-14] 0.0
King Theodore Walker Cheng-De Ambac Financial Group Inc [2024-04-05] 81946.26
Dimensional Fund Advisors LP Ambac Financial Group Inc [2024-02-09] 5.8
BlackRock Inc Ambac Financial Group Inc [2023-01-20] 14.8
BlackRock Inc Ambac Financial Group Inc [2019-01-10] 13.7
Vanguard Group Inc Ambac Financial Group Inc [2018-12-10] 10.19
Raging Capital Management LLC Ambac Financial Group Inc [2018-02-14] 4.98
Dimensional Fund Advisors LP Ambac Financial Group Inc [2017-02-09] 5.7
BlackRock Inc Ambac Financial Group Inc [2014-01-28] 5.4
Form 3/4/5 Filer 2011 - 2026
Lammtennant Joan M
Octave Specialty Group Inc
Iglesias Lisa G
Haft Ian David
Stein Jeffrey Scott
Price Michael D
Matus Kristi Ann
LeBlanc Claude
Metz Lawrence F
Trick David
Ahn Cristina E
Smith R Sharon
McGinnis Daniel
Ksenak Stephen Michael
Eisman Robert Bryan
Barranco David
Herzog David L
Prieur C James
Greene Alexander David
Reilly Michael Francis
Nader Tavakoli
Mandel Victor E
Bullis Eugene M
Adams Diana
Matanle Cathleen
Bruce IAIN H
Theobald Thomas C
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Ahn Cristina E
Restricted Stock Units · derivative
2026-03-23 Grant 8,067
Smith R Sharon
Restricted Stock Units · derivative
2026-03-23 Grant 24,375 $0.00
Trick David
Restricted Stock Units · derivative
2026-03-23 Grant 26,250 $0.00
Metz Lawrence F
Restricted Stock Units · derivative
2026-03-23 Grant 28,246 $0.00
LeBlanc Claude
Restricted Stock Units · derivative
2026-03-23 Grant 99,375 $0.00
Ahn Cristina E
Common Stock, par value $0.01 per share
2026-03-10 Option exercise 835
Ahn Cristina E
Common Stock, par value $0.01 per share
2026-03-10 Tax withheld 203 $4.90 995
Ahn Cristina E
Restricted Stock Units · derivative
2026-03-10 Option exercise 835
Trick David
Deferred Share Units · derivative
2026-03-03 Option exercise 9,790 $0.00
Smith R Sharon
Deferred Share Units · derivative
2026-03-03 Option exercise 8,720 $0.00
LeBlanc Claude
Common Stock
2026-03-03 Tax withheld 10,694 $5.60 59,886
Smith R Sharon
Common Stock
2026-03-03 Tax withheld 1,541 $5.60 8,630
Trick David
Restricted Stock Units · derivative
2026-03-03 Option exercise 11,505 $0.00
Trick David
Common Stock
2026-03-03 Tax withheld 1,715 $5.60 9,604
LeBlanc Claude
Deferred Share Units · derivative
2026-03-03 Option exercise 22,582 $0.00
LeBlanc Claude
Common Stock
2026-03-03 Option exercise 24,548 $0.00
LeBlanc Claude
Restricted Stock Units · derivative
2026-03-03 Option exercise 47,130 $0.00
Smith R Sharon
Restricted Stock Units · derivative
2026-03-03 Option exercise 10,261 $0.00
Trick David
Common Stock
2026-03-03 Option exercise 1,715 $0.00
Smith R Sharon
Common Stock
2026-03-03 Option exercise 1,541 $0.00
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 148 33,401,857
2025-12-31 146 39,064,374
2025-09-30 133 43,146,703
2025-06-30 150 47,262,552
2025-03-31 179 47,711,481
2024-12-31 183 46,161,234
2024-09-30 183 43,217,878
2024-06-30 239 80,650,404
2024-03-31 219 77,719,723
2023-12-31 213 77,206,716
2023-09-30 200 73,952,741
2023-06-30 197 77,137,624
Form 13F Holdings
Firm Period DFND Voting Shares
MRAZ Amerine & Associates Inc [2026-06-30] SOLE 0 21,450
Impact Capital Partners LLC [2026-06-30] DFND 0 19,516
Wealth Enhancement Advisory Services LLC [2026-06-30] SOLE 172 14,061
Versant Capital Management Inc [2026-06-30] SOLE 8,360 8,360
First Horizon Corp [2026-06-30] DFND 869 4,776
Farther Finance Advisors LLC [2026-06-30] SOLE 0 752
Dinuzzo Private Wealth Inc [2026-06-30] SOLE 0 177
True Wealth Design LLC [2026-06-30] SOLE 0 108
Physician Wealth Advisors Inc [2026-06-30] SOLE 0 86
IFP Advisors LLC [2026-06-30] SOLE 36 36
Fortitude Family Office LLC [2026-06-30] SOLE 8 8
Allied Private Wealth LLC [2026-06-30] SOLE 8 8
Prev | Page 1 | Next
Terms | Privacy | Providers | Companies | Guide
tony@aum13f.com