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 %
BlackRock
1
BlackRock
New York
$42.8M -$26.8M -3,065,833 -39%
Vanguard Group
2
Vanguard Group
Pennsylvania
$23.3M -$4.86M -555,166 -17%
Dimensional Fund Advisors
3
Dimensional Fund Advisors
Texas
$22.4M -$1.31M -149,271 -6%
Fidelity Investments
4
Fidelity Investments
Massachusetts
$13.4M -$694K -79,359 -5%
Susquehanna International Group
5
Susquehanna International Group
Pennsylvania
$10.3M +$3.72M +425,592 +56%
RP
6
Repertoire Partners
New York
$10.3M -$8.64M -987,756 -46%
Citadel Advisors
7
Citadel Advisors
Florida
$9.65M +$6.33M +723,712 +191%
Geode Capital Management
8
Geode Capital Management
Massachusetts
$9.58M +$424K +48,436 +5%
State Street
9
State Street
Massachusetts
$9.03M -$6.67M -761,748 -42%
BCC
10
Bain Capital Credit
Massachusetts
$8.73M
Morgan Stanley
11
Morgan Stanley
New York
$7.51M +$3.15M +360,085 +72%
American Century Companies
12
American Century Companies
Missouri
$7.49M -$639K -73,084 -8%
Jane Street
13
Jane Street
New York
$6.34M +$3.57M +407,918 +129%
Deutsche Bank
14
Deutsche Bank
Germany
$6.33M +$421K +48,117 +7%
WSL
15
Western Standard LLC
California
$6.12M +$2.15M +245,822 +54%
WHCM
16
Wolf Hill Capital Management
Connecticut
$6.07M -$2.68M -306,559 -31%
Goldman Sachs
17
Goldman Sachs
New York
$5.95M -$4.42M -505,521 -43%
GJL
18
Gendell Jeffrey L
$5.27M +$654K +74,748 +14%
BCL
19
Bracebridge Capital LLC
Massachusetts
$5.07M
Hotchkis & Wiley Capital Management
20
Hotchkis & Wiley Capital Management
California
$4.88M -$2.45M -279,970 -33%
SSA
21
Schonfeld Strategic Advisors
New York
$4.57M +$4.57M +522,484 New
Millennium Management
22
Millennium Management
New York
$4.45M +$2.62M +299,094 +143%
Barclays
23
Barclays
United Kingdom
$4.29M +$524K +59,885 +14%
Northern Trust
24
Northern Trust
Illinois
$4.04M -$658K -75,230 -14%
PGCM
25
Prescott Group Capital Management
Oklahoma
$3.87M +$2.17M +247,462 +127%