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

Top Sellers

1
WSL
1
Western Standard LLC
California
$0
2
RP
2
Repertoire Partners
New York
$5.12M
3
American Century Companies
3
American Century Companies
Missouri
$3.11M
4
Morgan Stanley
4
Morgan Stanley
New York
$3.25M
5
BlackRock
5
BlackRock
New York
$32.6M
Name Holding Trade Value Shares
Change 		Shares
Change %
BNP Paribas Financial Markets
51
BNP Paribas Financial Markets
France
$848K +$699K +98,402 +467%
HF
52
HRT Financial
New York
$845K -$2M -282,256 -70%
Connor, Clark & Lunn Investment Management (CC&L)
53
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$788K +$567K +79,854 +256%
NRD
54
Nebula Research & Development
New York
$761K +$242K +34,022 +47%
HSBC Holdings
55
HSBC Holdings
United Kingdom
$675K -$819K -118,087 -55%
Norges Bank
56
Norges Bank
Norway
$533K +$533K +75,000 New
RhumbLine Advisers
57
RhumbLine Advisers
Massachusetts
$532K +$38.2K +5,376 +8%
EF
58
Empirical Finance
Pennsylvania
$512K +$512K +72,182 New
Public Sector Pension Investment Board (PSP Investments)
59
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$511K – – –
Wells Fargo
60
Wells Fargo
California
$510K +$3.46K +487 +0.7%
CAU
61
Caxton Associates (UK)
$466K – – –
VF
62
Virtu Financial
New York
$446K +$446K +62,840 New
ACM
63
Aurelius Capital Management
New York
$430K +$430K +60,546 New
State of Wisconsin Investment Board
64
State of Wisconsin Investment Board
Wisconsin
$423K +$423K +59,544 New
T. Rowe Price Associates
65
T. Rowe Price Associates
Maryland
$371K +$23.7K +3,332 +7%
Royal Bank of Canada
66
Royal Bank of Canada
Ontario, Canada
$371K +$350K +49,197 +1,633%
AQR Capital Management
67
AQR Capital Management
Connecticut
$364K +$364K +51,300 New
BHCM
68
Brevan Howard Capital Management
Jersey
$360K -$168K -23,628 -32%
DAM
69
DLD Asset Management
New York
$355K +$355K +50,000 New
CC
70
Centiva Capital
New York
$332K +$332K +46,815 New
EGM
71
Engineers Gate Manager
New York
$331K -$589K -82,908 -64%
ECM
72
ExodusPoint Capital Management
New York
$327K -$333K -46,965 -50%
Two Sigma Investments
73
Two Sigma Investments
New York
$312K -$580K -81,740 -65%
FCBT
74
First Citizens Bank & Trust
North Carolina
$307K +$207K +29,140 +207%
Envestnet Portfolio Solutions
75
Envestnet Portfolio Solutions
Illinois
$296K +$207K +29,140 +233%
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