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
Name Holding Trade Value Shares
Change
Shares
Change %
EGM
51
Engineers Gate Manager
New York
$1.13M +$723K +82,682 +177%
Two Sigma Investments
52
Two Sigma Investments
New York
$1.1M -$58K -6,632 -5%
XT
53
XTX Topco
Cayman Islands
$1.05M +$801K +91,547 +326%
Balyasny Asset Management
54
Balyasny Asset Management
Illinois
$1.04M +$1.04M +118,765 New
OQS
55
Occudo Quantitative Strategies
Florida
$991K +$991K +114,575 New
QT
56
Quantbot Technologies
New York
$878K +$524K +59,874 +148%
Wolverine Trading
57
Wolverine Trading
Illinois
$874K +$625K +72,306 +251%
Ameriprise
58
Ameriprise
Minnesota
$871K -$1.19M -136,097 -58%
IMC Chicago
59
IMC Chicago
Illinois
$830K +$564K +64,487 +213%
ECM
60
ExodusPoint Capital Management
New York
$814K +$814K +93,039 New
VIM
61
VELA Investment Management
Ohio
$809K +$261K +29,828 +48%
Swiss National Bank
62
Swiss National Bank
Switzerland
$804K -$12.3K -1,400 -2%
UBS AM
63
UBS AM
Illinois
$781K -$917K -104,778 -54%
DFCM
64
Dark Forest Capital Management
Puerto Rico
$676K +$676K +77,234 New
BHCM
65
Brevan Howard Capital Management
Jersey
$650K +$650K +74,331 New
NRD
66
Nebula Research & Development
New York
$640K +$166K +18,925 +35%
Public Sector Pension Investment Board (PSP Investments)
67
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$630K -$1.04M -118,804 -62%
Wells Fargo
68
Wells Fargo
California
$624K -$875 -100 -0.1%
RhumbLine Advisers
69
RhumbLine Advisers
Massachusetts
$608K -$625K -71,459 -51%
RA
70
Royce & Associates
New York
$579K -$59.6K -6,812 -9%
CAU
71
Caxton Associates (UK)
$574K +$574K +65,647 New
DTL
72
Dynamic Technology Lab
Singapore
$562K +$562K +64,233 New
JPMorgan Chase & Co
73
JPMorgan Chase & Co
New York
$555K -$1.87M -213,343 -77%
AG
74
Algert Global
California
$549K -$225K -25,750 -29%
T. Rowe Price Associates
75
T. Rowe Price Associates
Maryland
$428K +$17.8K +2,038 +4%