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Ambac
AMBC

Overview Fund Activity

145 hedge funds and large institutions have $256M invested in Ambac in 2025 Q2 according to their latest regulatory filings, with 32 funds opening new positions, 48 increasing their positions, 47 reducing their positions, and 59 closing their positions.

Holders
145
Holders Change
-29
Holders Change %
-16.67%
% of All Funds
1.95%
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
47
Closed
59
Calls
$59.3M
Puts
$2.15M
Net Calls
+$57.2M
Net Calls Change
-$18.4M

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 Market Value Shares Shares
Change 		Shares
Change %
IIM
76
INTECH Investment Management
Florida
$294K 41,388 +4,250 +11%
Verition Fund Management
77
Verition Fund Management
Connecticut
$279K 39,318 -63 -0.2%
XT
78
XTX Topco
Cayman Islands
$274K 38,524 -81,083 -68%
Walleye Capital
79
Walleye Capital
New York
$270K 38,094 +38,094 New
FRM
80
Fox Run Management
Connecticut
$269K 37,922 -7,249 -16%
Qube Research & Technologies (QRT)
81
Qube Research & Technologies (QRT)
United Kingdom
$267K 37,584 +37,584 New
AllianceBernstein
82
AllianceBernstein
Tennessee
$266K 37,530 +9,690 +35%
AC
83
AXQ Capital
New Jersey
$252K 35,439 +7,694 +28%
PAS
84
Point72 Asia (Singapore)
Singapore
$235K 33,143 -11,947 -26%
GCM
85
Graham Capital Management
Connecticut
$223K 31,418 +31,418 New
JPMorgan Chase & Co
86
JPMorgan Chase & Co
New York
$222K 31,231 -32,188 -51%
Simplex Trading
87
Simplex Trading
Illinois
$221K 31,219 -99,452 -76%
QCM
88
Quantinno Capital Management
New York
$205K 28,826 +28,826 New
Mirae Asset Global ETFs Holdings
89
Mirae Asset Global ETFs Holdings
Hong Kong
$187K 26,281 -696 -3%
FCM
90
FJ Capital Management
Virginia
$175K 24,677 +24,677 New
KA
91
KLCM Advisors
Wisconsin
$170K 24,000 – –
SEI Investments
92
SEI Investments
Pennsylvania
$167K 23,565 +4,689 +25%
Citigroup
93
Citigroup
New York
$164K 23,031 -25,385 -52%
CAM
94
Cresset Asset Management
Illinois
$158K 22,193 – –
SG Americas Securities
95
SG Americas Securities
New York
$154K 21,642 -14,554 -40%
GCM
96
Gator Capital Management
Florida
$152K 21,435 – –
Creative Planning
97
Creative Planning
Kansas
$145K 20,421 +20,421 New
MAA
98
Mraz Amerine & Associates
California
$134K 18,850 -700 -4%
QT
99
Quantbot Technologies
New York
$134K 18,834 -81,474 -81%
Manulife (Manufacturers Life Insurance)
100
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$128K 17,993 +1,615 +10%
2 3
4
5 6