Ambac Financial Group

AMBC • NYSE

Ambac Financial Group is a insurance - specialty company in the financial services sector on NYSE, led by Diana Adams, with a market cap of $395.6M. As of Q3 2025, 81% of shares are held by 125 institutional investors, with BlackRock, Inc. as the largest holder at 9.68%.

President and CEODiana Adams

Market Cap$395.6M

Insurance - Specialty

Financial Services

Employees168.0

Websiteambac.com

Country

United States of America

Overview

Overview of institutional ownership in AMBC as of Q3 2025 with a market cap of $387.0M

All Institutions

Institutions: 125
Value Held: $313.6M
Shares Held: 37.6M
Avg Position: $2.5M
Median Position: $472.3K

Hedge Funds

Hedge Funds: 24
Value Held: $83.2M
Shares Held: 10.0M
Avg Position: $3.5M
Median Position: $988.1K

Ownership Breakdown

Institutional (non-HF)

59.52%

$230.3M

Hedge Funds

21.51%

$83.2M

Retail & Other

18.97%

$73.4M

Based on market cap of $387.0M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in AMBC as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
B BlackRock, Inc. Institution	-	$37.5M 0.00% of portfolio	9.68% 4.5M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
Western Standard, LLC Hedge Fund•Long/Short	Eric David Andersen Managing Partner	$22.0M 11.78% of portfolio	5.69% 2.6M shares	Q3 2024 Held for 1y 2m	$187.0M
VANGUARD GROUP INC Institution	Salim Ramji CEO	$21.3M 0.00% of portfolio	5.51% 2.6M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$17.9M 0.00% of portfolio	4.61% 2.1M shares	Q4 2013 Held for 11y 11m	$466.32B
CONTINENTAL GENERAL INSURANCE CO Real Assets	Carlos Pedro Vaz CEO	$17.3M 3.35% of portfolio	4.46% 2.1M shares	Q2 2025 Held for 5 months	$514.2M
G GENDELL JEFFREY L Institution	-	$15.6M 0.28% of portfolio	4.02% 1.9M shares	Q4 2022 Held for 2y 11m	$5.5B
FMR LLC Institution	-	$12.7M 0.00% of portfolio	3.29% 1.5M shares	≤ Q2 2013 Held for 12y 5m+	$1.92T
M MANUFACTURERES LIFE INSURANCE CO Institution	-	$10.1M 0.01% of portfolio	2.60% 1.2M shares	Q3 2013 Held for 12y 2m	$120.17B
Wolf Hill Capital Management, LP Hedge Fund•Long/Short	Gary Steven Lehrman Founder	$9.7M 0.85% of portfolio	2.50% 1.2M shares	Q4 2024 Held for 11 months	$1.1B
Caption Management, LLC Hedge Fund•Long/Short	William Lamblè Cooper CEO	$9.4M 0.55% of portfolio	2.42% 1.1M shares	Q2 2020 Held for 5y 5m	$1.7B

Net Capital Flow

Institutional buying and selling activity for AMBC in Q3 2025

Traded: +$19.5M
Buyers: 64
Sellers: 79
Total Bought: +$77.9M
Total Sold: −$58.4M
Avg Position: $1.9M

Biggest Buyers

Institution	Net Bought	Current Position
Western Standard, LLC Hedge Fund•Long/Short	+$22.0M +2.6M shares	$22.0M 2.6M shares
M MANUFACTURERES LIFE INSURANCE CO Institution	+$9.9M +1.2M shares	$10.1M 1.2M shares
Caption Management, LLC Hedge Fund•Long/Short	+$7.9M +945.1K shares	$9.4M 1.1M shares
CONTINENTAL GENERAL INSURANCE CO Real Assets	+$7.1M +850.0K shares	$17.3M 2.1M shares
G GENDELL JEFFREY L Institution	+$5.6M +666.1K shares	$15.6M 1.9M shares
N Nuveen, LLC Institution	+$5.1M +612.4K shares	$9.0M 1.1M shares
Wolf Hill Capital Management, LP Hedge Fund•Long/Short	+$3.9M +464.8K shares	$9.7M 1.2M shares
J JANE STREET GROUP, LLC Institution	+$2.8M +336.7K shares	$7.1M 849.2K shares
Schonfeld Strategic Advisors LLC Hedge Fund•Multi-Strategy	+$2.2M +262.9K shares	$4.6M 548.4K shares
BARCLAYS PLC Institution	+$1.8M +214.7K shares	$5.6M 669.5K shares

Biggest Sellers

Institution	Net Sold	Current Position
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	−$7.9M −947.2K shares	$1.4M 171.5K shares
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC Long Only Manager	−$5.6M −793.5K shares	Sold Off 0 shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	−$5.6M −666.3K shares	$2.3M 274.3K shares
A AMERICAN CENTURY COMPANIES INC Institution	−$2.5M −305.7K shares	$1.1M 132.6K shares
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$2.5M −295.1K shares	$5.8M 700.9K shares
S Squarepoint Ops LLC Hedge Fund•Quant	−$2.4M −291.4K shares	$1.5M 175.0K shares
MORGAN STANLEY RIA/Wealth	−$2.2M −263.5K shares	$1.6M 194.1K shares
IMMERSION CORP Institution	−$2.1M −300.0K shares	Sold Off 0 shares
C Cubist Systematic Strategies, LLC Institution	−$2.1M −299.9K shares	Sold Off 0 shares
DIMENSIONAL FUND ADVISORS LP Long Only Manager	−$2.1M −254.7K shares	$17.9M 2.1M shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited AMBC in Q3 2025

New Positions: 8
New Value: $3.8M
Exited Positions: 37
Exited Value: $19.1M

New Positions

Institution	Position Value
A Arrowpoint Investment Partners Pte. Ltd. Institution	$1.7M 203.0K shares
Cruiser Capital Advisors, LLC Hedge Fund•Long/Short	$932.4K 111.8K shares
S Sender Co & Partners, Inc. Institution	$591.2K 70.9K shares
Diametric Capital, LP Hedge Fund•Long/Short	$539.0K 64.6K shares
SRS Capital Advisors, Inc. RIA/Wealth	$55.2K 6.6K shares
Cove Street Capital, LLC Hedge Fund•Value	$15.5K 1.9K shares
MAI Wealth Advisors RIA/Wealth	$8.9K 1.1K shares
O Optiver Holding B.V. Institution	$3.5K 424.0 shares

Exited Positions

Institution	Previous Position
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC Long Only Manager	$5.6M 793.5K shares
IMMERSION CORP Institution	$2.1M 300.0K shares
C Cubist Systematic Strategies, LLC Institution	$2.1M 299.9K shares
AMERIPRISE FINANCIAL INC Institution	$1.2M 164.8K shares
Walleye Trading LLC RIA/Wealth	$1.1M 154.2K shares
H HRT FINANCIAL LLC Institution	$845.0K 119.0K shares
P PUBLIC SECTOR PENSION INVESTMENT BOARD Institution	$511.2K 72.0K shares
V Virtu Financial LLC Institution	$446.2K 62.8K shares
Aurelius Capital Management, LP Hedge Fund•Distressed	$429.9K 60.5K shares
STATE OF WISCONSIN INVESTMENT BOARD RIA/Wealth	$422.8K 59.5K shares

Options Activity

Institutions with the largest Call and Put options positions in AMBC as of Q3 2025

Call Positions: 12
Call Value: $41.8M
Put Positions: 7
Put Value: $4.3M

Call Positions

Institution	Position Value
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$8.6M 10.3K contracts
Caption Management, LLC Hedge Fund•Long/Short	$8.5M 10.2K contracts
J JANE STREET GROUP, LLC Institution	$7.2M 8.6K contracts
DLD Asset Management, LP Hedge Fund•Multi-Strategy	$7.0M 8.4K contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$6.1M 7.4K contracts
Walleye Trading LLC RIA/Wealth	$2.6M 3.2K contracts
W WOLVERINE TRADING, LLC Institution	$923.4K 950.0 contracts
Q Quarry LP Institution	$437.9K 525.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$254.4K 305.0 contracts
LEVIN CAPITAL STRATEGIES, L.P. Hedge Fund•Multi-Strategy	$146.0K 175.0 contracts

Put Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$1.7M 2.1K contracts
J JANE STREET GROUP, LLC Institution	$1.0M 1.2K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$771.5K 925.0 contracts
Caption Management, LLC Hedge Fund•Long/Short	$400.3K 480.0 contracts
W WOLVERINE TRADING, LLC Institution	$249.8K 257.0 contracts
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	$51.7K 62.0 contracts
Walleye Trading LLC RIA/Wealth	$48.4K 58.0 contracts

Most Committed Institutions

Institutions with AMBC as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
Western Standard, LLC Hedge Fund•Long/Short	Eric David Andersen Managing Partner	11.78% $22.0M	5.69% 2.6M shares	Q3 2024 Held for 1y 2m	$187.0M
CONTINENTAL GENERAL INSURANCE CO Real Assets	Carlos Pedro Vaz CEO	3.35% $17.3M	4.46% 2.1M shares	Q2 2025 Held for 5 months	$514.2M
Sankaty Advisors, LLC Hedge Fund•Credit Arb	Sally Dee Fassler Dornaus CFO	2.91% $9.2M	2.39% 1.1M shares	Q3 2024 Held for 1y 2m	$317.1M
A Arrowpoint Investment Partners Pte. Ltd. Institution	-	2.52% $1.7M	0.44% 203.0K shares	Q3 2025 Held for 2 months	$67.2M
Bracebridge Capital, LLC Hedge Fund•Credit Arb	Nancy Gail Zimmerman Founder	2.11% $4.8M	1.25% 579.2K shares	Q4 2019 Held for 5y 11m	$228.8M
Cruiser Capital Advisors, LLC Hedge Fund•Long/Short	Keith Michael Rosenbloom Managing Partner	1.00% $932.4K	0.24% 111.8K shares	Q3 2025 Held for 2 months	$93.0M
THIRD AVENUE MANAGEMENT LLC Long Only Manager	Michael Anthony Buono CFO	0.92% $4.9M	1.30% 603.4K shares	Q4 2024 Held for 11 months	$532.7M
Wolf Hill Capital Management, LP Hedge Fund•Long/Short	Gary Steven Lehrman Founder	0.85% $9.7M	2.50% 1.2M shares	Q4 2024 Held for 11 months	$1.1B
P PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. Hedge Fund•Long/Short	Matthew Nicholas Dunham President	0.79% $7.5M	1.93% 896.0K shares	Q2 2024 Held for 1y 5m	$948.6M
Caption Management, LLC Hedge Fund•Long/Short	William Lamblè Cooper CEO	0.55% $9.4M	2.42% 1.1M shares	Q2 2020 Held for 5y 5m	$1.7B

Hedge Fund Spotlight

Discover hedge funds investing in AMBC

Cruiser Capital Advisors, LLC

Hedge Fund • Long/Short

Portfolio ManagerKeith Michael Rosenbloom

Portfolio Value: $93.0M
Positions: 50
Last Reported: Q3 2025

Sector Allocation

Position in Ambac Financial Group

Market Value: $932.4K
Shares Held: 111.8K
Portfolio Weight: 1.00%
Owned Since: 2025-Q3

Top Holding	Sector	Market Value	Weight
1 FTAI Aviation Ltd. FTAI	Rental & Leasing Services Industrials	$31.2M	33.49%
2 APi Group APG	Engineering & Construction Industrials	$8.6M	9.26%
3 CRH CRH	Construction Materials Basic Materials	$7.5M	8.09%