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Ambac
AMBC

Overview Fund Activity

174 hedge funds and large institutions have $325M invested in Ambac in 2025 Q1 according to their latest regulatory filings, with 35 funds opening new positions, 53 increasing their positions, 59 reducing their positions, and 38 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
174
Holders Change
-6
Holders Change %
-3.33%
% of All Funds
2.36%
Holding in Top 10
4
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+100%
% of All Funds
0.05%
New
35
Increased
53
Reduced
59
Closed
38
Calls
$84.6M
Puts
$8.99M
Net Calls
+$75.6M
Net Calls Change
+$23.5M

Top Buyers

1
Citadel Advisors
Citadel Advisors
Florida
+$6.33M
2
SSA
Schonfeld Strategic Advisors
New York
+$4.57M
3
Susquehanna International Group
Susquehanna International Group
Pennsylvania
+$3.72M
4
Jane Street
Jane Street
New York
+$3.57M
5
Morgan Stanley
Morgan Stanley
New York
+$3.15M

Top Sellers

1
BlackRock
BlackRock
New York
-$26.8M
2
RP
Repertoire Partners
New York
-$8.64M
3
PCM
Portolan Capital Management
Massachusetts
-$7.46M
4
State Street
State Street
Massachusetts
-$6.67M
5
Vanguard Group
Vanguard Group
Pennsylvania
-$4.86M
Name Holding Trade Value Shares
Change 		Shares
Change %
Walleye Capital
176
Walleye Capital
New York
– -$1.26M -99,425 Closed
GCM
177
Graham Capital Management
Connecticut
– -$651K -51,489 Closed
Prudential Financial
178
Prudential Financial
New Jersey
– -$603K -47,670 Closed
New York State Teachers Retirement System (NYSTRS)
179
New York State Teachers Retirement System (NYSTRS)
New York
– -$568K -44,930 Closed
Thrivent Financial for Lutherans
180
Thrivent Financial for Lutherans
Minnesota
– -$464K -36,671 Closed
HighTower Advisors
181
HighTower Advisors
Illinois
– -$448K -35,422 Closed
CC
182
Centiva Capital
New York
– -$444K -35,111 Closed
Corient Private Wealth
183
Corient Private Wealth
Florida
– -$33.6K -28,220 Closed
PP
184
PDT Partners
New York
– -$357K -28,185 Closed
SOADOR
185
State of Alaska Department of Revenue
Alaska
– -$340K -26,912 Closed
IMRF
186
Illinois Municipal Retirement Fund
Illinois
– -$316K -24,988 Closed
Amundi
187
Amundi
France
– -$281K -24,217 Closed
LSERS
188
Louisiana State Employees Retirement System
Louisiana
– -$290K -22,900 Closed
Creative Planning
189
Creative Planning
Kansas
– -$268K -21,210 Closed
YCM
190
Yousif Capital Management
Michigan
– -$229K -18,075 Closed
AQR Capital Management
191
AQR Capital Management
Connecticut
– -$226K -17,837 Closed
Comerica Bank
192
Comerica Bank
Texas
– -$206K -16,296 Closed
MSRPS
193
Maryland State Retirement & Pension System
Maryland
– -$201K -15,927 Closed
ProShare Advisors
194
ProShare Advisors
Maryland
– -$174K -13,756 Closed
Bank of Montreal
195
Bank of Montreal
Ontario, Canada
– -$156K -12,357 Closed
AIM
196
Aigen Investment Management
New York
– -$146K -11,539 Closed
OPERF
197
Oregon Public Employees Retirement Fund
Oregon
– -$142K -11,198 Closed
CIP
198
Cornerstone Investment Partners
Georgia
– -$131K -10,323 Closed
COPPSERS
199
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
– -$128K -10,128 Closed
BCM
200
Bayesian Capital Management
New York
– -$127K -10,076 Closed
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