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

more call options, than puts

Call options by funds: $ | Put options by funds: $

more funds holding in top 10

Funds holding in top 10:

less first-time investments, than exits

New positions opened: | Existing positions closed:

less funds holding

Funds holding:

6.83% less ownership

Funds ownership: 87.46%80.63% (-6.8%)

10% less repeat investments, than reductions

Existing positions increased: 53 | Existing positions reduced: 59

38% less capital invested

Capital invested by funds: $522M → $325M (-$197M)

Holders
174
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
4
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$84.6M
Puts
$8.99M
Net Calls
Net Calls Change

Top Buyers

1 +$6.33M
2 +$4.57M
3 +$3.72M
4
Jane Street
Jane Street
New York
+$3.57M
5
Morgan Stanley
Morgan Stanley
New York
+$3.15M

Top Sellers

1 -$26.8M
2 -$8.64M
3 -$7.46M
4
State Street
State Street
Massachusetts
-$6.67M
5
Vanguard Group
Vanguard Group
Pennsylvania
-$4.86M
Name Holding Trade Value Shares
Change
Change in
Stake
Walleye Capital
176
Walleye Capital
New York
GCM
177
Graham Capital Management
Connecticut
Prudential Financial
178
Prudential Financial
New Jersey
New York State Teachers Retirement System (NYSTRS)
179
New York State Teachers Retirement System (NYSTRS)
New York
Thrivent Financial for Lutherans
180
Thrivent Financial for Lutherans
Minnesota
HighTower Advisors
181
HighTower Advisors
Illinois
CC
182
Centiva Capital
New York
Corient Private Wealth
183
Corient Private Wealth
Florida
PP
184
PDT Partners
New York
SOADOR
185
State of Alaska Department of Revenue
Alaska
IMRF
186
Illinois Municipal Retirement Fund
Illinois
Amundi
187
Amundi
France
LSERS
188
Louisiana State Employees Retirement System
Louisiana
Creative Planning
189
Creative Planning
Kansas
YCM
190
Yousif Capital Management
Michigan
AQR Capital Management
191
AQR Capital Management
Connecticut
Comerica Bank
192
Comerica Bank
Texas
MSRPS
193
Maryland State Retirement & Pension System
Maryland
ProShare Advisors
194
ProShare Advisors
Maryland
Bank of Montreal
195
Bank of Montreal
Ontario, Canada
AIM
196
Aigen Investment Management
New York
OPERF
197
Oregon Public Employees Retirement Fund
Oregon
CIP
198
Cornerstone Investment Partners
Georgia
COPPSERS
199
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
BCM
200
Bayesian Capital Management
New York