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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.

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
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 Holding Trade Value Shares
Change 		Shares
Change %
Barclays
26
Barclays
United Kingdom
$3.23M -$248K -34,919 -7%
American Century Companies
27
American Century Companies
Missouri
$3.11M -$2.97M -417,926 -49%
Northern Trust
28
Northern Trust
Illinois
$2.76M -$514K -72,335 -16%
Charles Schwab
29
Charles Schwab
California
$2.75M +$65.3K +9,195 +2%
UBS Group
30
UBS Group
Switzerland
$2.56M +$1.55M +218,334 +154%
YIH
31
Y-Intercept (HK)
Hong Kong
$2.49M +$1.45M +204,255 +139%
D.E. Shaw & Co
32
D.E. Shaw & Co
New York
$2.38M -$538K -75,823 -18%
Group One Trading
33
Group One Trading
Illinois
$2.28M -$140K -19,744 -6%
BCM
34
Bridgeway Capital Management
Texas
$2.25M +$86.1K +12,122 +4%
TI
35
Trexquant Investment
Connecticut
$2.25M +$1.11M +155,864 +97%
Tudor Investment Corp
36
Tudor Investment Corp
Connecticut
$2.17M +$205K +28,873 +10%
I
37
Immersion
Florida
$2.13M +$2.13M +300,000 New
CSS
38
Cubist Systematic Strategies
Connecticut
$2.13M +$918K +129,305 +76%
SSA
39
Schonfeld Strategic Advisors
New York
$2.03M -$1.68M -236,903 -45%
EF
40
Empowered Funds
Pennsylvania
$1.47M +$86.1K +12,122 +6%
HA
41
Harbor Advisors
Florida
$1.39M – – –
Renaissance Technologies
42
Renaissance Technologies
New York
$1.32M +$104K +14,600 +9%
CM
43
Caption Management
Oklahoma
$1.25M -$1.33M -187,008 -52%
Invesco
44
Invesco
Georgia
$1.21M -$71.4K -10,059 -6%
Bank of America
45
Bank of America
North Carolina
$1.18M -$123K -17,373 -9%
Ameriprise
46
Ameriprise
Minnesota
$1.17M +$463K +65,253 +66%
Walleye Trading
47
Walleye Trading
New York
$1.09M -$1.02M -143,339 -48%
Bank of New York Mellon
48
Bank of New York Mellon
New York
$1.01M -$15.2K -2,138 -1%
IMC Chicago
49
IMC Chicago
Illinois
$1M +$328K +46,223 +49%
VIM
50
VELA Investment Management
Ohio
$872K +$216K +30,358 +33%
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