122 hedge funds and large institutions have $833M invested in Ambac in 2015 Q1 according to their latest regulatory filings, with 15 funds opening new positions, 39 increasing their positions, 35 reducing their positions, and 17 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
122
Holders Change
-2
Holders Change %
-1.61%
% of All Funds
3.25%
Holding in Top 10
8
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+14.29%
% of All Funds
0.21%
New
15
Increased
39
Reduced
35
Closed
17
Calls
$22.3M
Puts
$13.7M
Net Calls
+$8.62M
Net Calls Change
-$32M
Name Holding Trade Value Shares
Change
Shares
Change %
Fidelity Investments
1
Fidelity Investments
Massachusetts
$54.2M
CP
2
Centerbridge Partners
New York
$53.9M
Vanguard Group
3
Vanguard Group
Pennsylvania
$52.4M +$1.65M +68,134 +3%
CCA
4
Canyon Capital Advisors
Texas
$51.5M -$1.13M -46,706 -2%
CIFMU
5
Childrens Investment Fund Management (UK)
United Kingdom
$48.1M
FTCM
6
Fir Tree Capital Management
New York
$47.9M -$694K -28,692 -1%
AGC
7
Alden Global Capital
Florida
$43.2M +$43.2M +1,785,150 New
CS
8
Credit Suisse
Switzerland
$34.3M +$738K +30,515 +2%
Dimensional Fund Advisors
9
Dimensional Fund Advisors
Texas
$32.8M +$5.9M +243,812 +22%
WA
10
Whitebox Advisors
Minnesota
$29.3M -$6.36M -262,760 -18%
TI
11
Tyrian Investments
New York
$27.8M +$23.4M +965,113 +527%
GC
12
GW Capital
Washington
$25.5M -$528K -21,798 -2%
BIT
13
BlackRock Institutional Trust
California
$25.3M -$156K -6,464 -0.6%
BFA
14
BlackRock Fund Advisors
California
$23M -$1.91K -79 -0%
State Street
15
State Street
Massachusetts
$18.6M +$902K +37,260 +5%
Bank of America
16
Bank of America
North Carolina
$18.5M +$14.1M +580,744 +316%
SCI
17
Seneca Capital Investments
New York
$17M +$3.65M +150,654 +27%
Goldman Sachs
18
Goldman Sachs
New York
$14.5M +$11.8M +485,940 +436%
KCM
19
Key Colony Management
Arkansas
$13.7M -$3.01M -124,259 -18%
Northern Trust
20
Northern Trust
Illinois
$11.8M +$243K +10,026 +2%
RA
21
Royce & Associates
New York
$11.2M -$691K -28,558 -6%
Morgan Stanley
22
Morgan Stanley
New York
$10.9M -$4.89M -202,065 -31%
SC
23
Sessa Capital
New York
$10.8M +$1.28M +52,929 +13%
Millennium Management
24
Millennium Management
New York
$8.41M -$4.98M -205,702 -37%
BTS
25
BB&T Securities
Virginia
$8.05M +$125K +518 +2%