AMBC icon

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 %
Wolverine Trading
151
Wolverine Trading
Illinois
– -$874K -101,058 Closed
Swiss National Bank
152
Swiss National Bank
Switzerland
– -$804K -91,900 Closed
UBS AM
153
UBS AM
Illinois
– -$781K -89,256 Closed
DFCM
154
Dark Forest Capital Management
Puerto Rico
– -$676K -77,234 Closed
RA
155
Royce & Associates
New York
– -$579K -66,122 Closed
DTL
156
Dynamic Technology Lab
Singapore
– -$562K -64,233 Closed
AG
157
Algert Global
California
– -$549K -62,719 Closed
California State Teachers Retirement System (CalSTRS)
158
California State Teachers Retirement System (CalSTRS)
California
– -$387K -44,277 Closed
OAM
159
Oxford Asset Management
United Kingdom
– -$369K -42,123 Closed
HT
160
HAP Trading
New York
– -$367K -41,939 Closed
JG
161
Jain Global
New York
– -$321K -36,672 Closed
Canada Life
162
Canada Life
Manitoba, Canada
– -$300K -34,226 Closed
Point72 Asset Management
163
Point72 Asset Management
Connecticut
– -$290K -33,100 Closed
Two Sigma Advisers
164
Two Sigma Advisers
New York
– -$283K -32,300 Closed
MF
165
Magnetar Financial
Illinois
– -$238K -27,188 Closed
FGP
166
Freestone Grove Partners
California
– -$225K -25,759 Closed
Ensign Peak Advisors
167
Ensign Peak Advisors
Utah
– -$211K -24,133 Closed
MIM
168
MetLife Investment Management
New Jersey
– -$206K -23,542 Closed
QC
169
Quantessence Capital
New York
– -$206K -23,500 Closed
CF
170
Corebridge Financial
Texas
– -$195K -22,301 Closed
EC
171
EntryPoint Capital
New York
– -$177K -20,235 Closed
Janus Henderson Group
172
Janus Henderson Group
United Kingdom
– -$171K -19,792 Closed
PTC
173
Petrus Trust Company
Texas
– -$170K -19,432 Closed
LCM
174
Laurion Capital Management
New York
– -$143K -16,353 Closed
Hudson Bay Capital Management
175
Hudson Bay Capital Management
Connecticut
– -$135K -15,470 Closed
5 6
7
8 9