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
Name Holding Trade Value Shares
Change
Shares
Change %
IIM
76
INTECH Investment Management
Florida
$294K +$30.2K +4,250 +11%
Verition Fund Management
77
Verition Fund Management
Connecticut
$279K -$447 -63 -0.2%
XT
78
XTX Topco
Cayman Islands
$274K -$576K -81,083 -68%
Walleye Capital
79
Walleye Capital
New York
$270K +$270K +38,094 New
FRM
80
Fox Run Management
Connecticut
$269K -$51.5K -7,249 -16%
Qube Research & Technologies (QRT)
81
Qube Research & Technologies (QRT)
United Kingdom
$267K +$267K +37,584 New
AllianceBernstein
82
AllianceBernstein
Tennessee
$266K +$68.8K +9,690 +35%
AC
83
AXQ Capital
New Jersey
$252K +$54.6K +7,694 +28%
PAS
84
Point72 Asia (Singapore)
Singapore
$235K -$84.8K -11,947 -26%
GCM
85
Graham Capital Management
Connecticut
$223K +$223K +31,418 New
JPMorgan Chase & Co
86
JPMorgan Chase & Co
New York
$222K -$229K -32,188 -51%
Simplex Trading
87
Simplex Trading
Illinois
$221K -$704K -99,452 -76%
QCM
88
Quantinno Capital Management
New York
$205K +$205K +28,826 New
Mirae Asset Global ETFs Holdings
89
Mirae Asset Global ETFs Holdings
Hong Kong
$187K -$4.94K -696 -3%
FCM
90
FJ Capital Management
Virginia
$175K +$175K +24,677 New
KA
91
KLCM Advisors
Wisconsin
$170K
SEI Investments
92
SEI Investments
Pennsylvania
$167K +$33.3K +4,689 +25%
Citigroup
93
Citigroup
New York
$164K -$180K -25,385 -52%
CAM
94
Cresset Asset Management
Illinois
$158K
SG Americas Securities
95
SG Americas Securities
New York
$154K -$104K -14,554 -40%
GCM
96
Gator Capital Management
Florida
$152K
Creative Planning
97
Creative Planning
Kansas
$145K +$145K +20,421 New
MAA
98
Mraz Amerine & Associates
California
$134K -$4.97K -700 -4%
QT
99
Quantbot Technologies
New York
$134K -$578K -81,474 -81%
Manulife (Manufacturers Life Insurance)
100
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$128K +$11.5K +1,615 +10%