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Ambac
AMBC

Overview Fund Activity

146 hedge funds and large institutions have $262M invested in Ambac in 2025 Q2 according to their latest regulatory filings, with 32 funds opening new positions, 48 increasing their positions, 48 reducing their positions, and 59 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
146
Holders Change
-28
Holders Change %
-16.09%
% of All Funds
1.96%
Holding in Top 10
6
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+50%
% of All Funds
0.08%
New
32
Increased
48
Reduced
48
Closed
59
Calls
$69.4M
Puts
$4.38M
Net Calls
+$65M
Net Calls Change
-$10.5M

Top Buyers

1
CGIC
Continental General Insurance Company
Texas
$8.65M
2
GJL
Gendell Jeffrey L
$8.51M
3
Millennium Management
Millennium Management
New York
$7.07M
4
Marshall Wace
Marshall Wace
United Kingdom
$4.6M
5
PGCM
Prescott Group Capital Management
Oklahoma
$6.22M

Top Sellers

1
WSL
Western Standard LLC
California
$0
2
RP
Repertoire Partners
New York
$5.12M
3
American Century Companies
American Century Companies
Missouri
$3.11M
4
Morgan Stanley
Morgan Stanley
New York
$3.25M
5
BlackRock
BlackRock
New York
$32.6M
Name Holding Trade Value Shares
Change 		Shares
Change %
BlackRock
1
BlackRock
New York
$32.6M -$2.18M -306,626 -6%
Vanguard Group
2
Vanguard Group
Pennsylvania
$18.2M -$656K -92,442 -3%
Dimensional Fund Advisors
3
Dimensional Fund Advisors
Texas
$17M -$1.14M -161,143 -6%
Fidelity Investments
4
Fidelity Investments
Massachusetts
$10.9M -$21.5K -3,026 -0.2%
CGIC
5
Continental General Insurance Company
Texas
$8.65M +$8.65M +1,218,349 New
GJL
6
Gendell Jeffrey L
$8.51M +$4.23M +596,134 +99%
Geode Capital Management
7
Geode Capital Management
Massachusetts
$7.97M +$196K +27,670 +3%
Citadel Advisors
8
Citadel Advisors
Florida
$7.94M +$114K +16,039 +1%
BCC
9
Bain Capital Credit
Massachusetts
$7.87M – – –
Millennium Management
10
Millennium Management
New York
$7.07M +$3.46M +487,355 +96%
State Street
11
State Street
Massachusetts
$6.81M -$521K -73,439 -7%
Susquehanna International Group
12
Susquehanna International Group
Pennsylvania
$6.68M -$1.7M -239,974 -20%
PGCM
13
Prescott Group Capital Management
Oklahoma
$6.22M +$3.08M +433,613 +98%
Hotchkis & Wiley Capital Management
14
Hotchkis & Wiley Capital Management
California
$5.63M +$1.67M +235,820 +42%
RP
15
Repertoire Partners
New York
$5.12M -$3.21M -452,686 -39%
WHCM
16
Wolf Hill Capital Management
Connecticut
$4.92M – – –
Marshall Wace
17
Marshall Wace
United Kingdom
$4.6M +$3.14M +442,750 +216%
Deutsche Bank
18
Deutsche Bank
Germany
$4.58M -$553K -77,890 -11%
TAM
19
Third Avenue Management
New York
$4.28M +$1.68M +236,930 +65%
BCL
20
Bracebridge Capital LLC
Massachusetts
$4.11M – – –
Jane Street
21
Jane Street
New York
$3.64M -$1.5M -211,651 -29%
Goldman Sachs
22
Goldman Sachs
New York
$3.4M -$1.43M -200,796 -30%
NL
23
Nuveen LLC
North Carolina
$3.32M +$1.31M +184,321 +65%
Squarepoint
24
Squarepoint
New York
$3.31M +$1.66M +233,986 +101%
Morgan Stanley
25
Morgan Stanley
New York
$3.25M -$2.84M -400,409 -47%
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