129 hedge funds and large institutions have $830M invested in Ambac in 2013 Q4 according to their latest regulatory filings, with 39 funds opening new positions, 40 increasing their positions, 32 reducing their positions, and 23 closing their positions.

Holders
129
Holders Change
+14
Holders Change %
+12.17%
% of All Funds
3.75%
Holding in Top 10
13
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+8.33%
% of All Funds
0.38%
New
39
Increased
40
Reduced
32
Closed
23
Calls
$64.8M
Puts
$19.7M
Net Calls
+$45.1M
Net Calls Change
+$40.8M
Name Market Value Shares Shares
Change
Shares
Change %
FTCM
1
Fir Tree Capital Management
New York
$51.7M 2,106,400 +200,000 +10%
CCA
2
Canyon Capital Advisors
Texas
$50.4M 2,052,172 -159,000 -7%
CP
3
Centerbridge Partners
New York
$49.2M 2,003,108
CIFMU
4
Childrens Investment Fund Management (UK)
United Kingdom
$48.8M 1,985,785
Vanguard Group
5
Vanguard Group
Pennsylvania
$45.2M 1,839,502 -31,027 -2%
AGCJ
6
Alden Global Capital (Jersey)
Jersey
$33M 1,341,725 +122,925 +10%
MAMNY
7
Marathon Asset Management (New York)
New York
$31.6M 1,287,895 -500,000 -28%
WA
8
Whitebox Advisors
Minnesota
$30.2M 1,227,842 +500,436 +69%
BIT
9
BlackRock Institutional Trust
California
$29.7M 1,207,573 -82,426 -6%
KCM
10
Key Colony Management
Arkansas
$26.8M 1,091,841 +596,031 +120%
BFA
11
BlackRock Fund Advisors
California
$25.6M 1,041,534 -145,561 -12%
LPLP
12
Lansdowne Partners Limited Partnership
United Kingdom
$23.6M 959,315 +959,315 New
APCM
13
Arbiter Partners Capital Management
New York
$20.2M 823,198 +21,900 +3%
Morgan Stanley
14
Morgan Stanley
New York
$19.8M 805,937 +634,131 +369%
State Street
15
State Street
Massachusetts
$18.9M 768,403 +52,864 +7%
RA
16
Royce & Associates
New York
$18.7M 760,198 +111,198 +17%
FS
17
Feinberg Stephen
$17.5M 712,813 -451,629 -39%
Northern Trust
18
Northern Trust
Illinois
$15M 611,865 +17,065 +3%
MCM
19
Maltese Capital Management
New York
$14.9M 605,600 -37,100 -6%
ACM
20
Archer Capital Management
New York
$14.7M 599,569 +168,968 +39%
Fidelity Investments
21
Fidelity Investments
Massachusetts
$14M 570,160 +75,000 +15%
JG
22
Jefferies Group
New York
$13.4M 547,152 +456,186 +501%
Deutsche Bank
23
Deutsche Bank
Germany
$12.9M 524,339 +197,288 +60%
CC
24
Caspian Capital
New York
$12.4M 504,120 +281,718 +127%
BP
25
Boston Provident
New Jersey
$11M 449,417 -124,761 -22%