146 hedge funds and large institutions have $628M invested in Ambac in 2017 Q1 according to their latest regulatory filings, with 28 funds opening new positions, 49 increasing their positions, 44 reducing their positions, and 26 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
146
Holders Change
-4
Holders Change %
-2.67%
% of All Funds
3.64%
Holding in Top 10
8
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
0.2%
New
28
Increased
49
Reduced
44
Closed
26
Calls
$30.2M
Puts
$5.49M
Net Calls
+$24.7M
Net Calls Change
+$12.2M
Name Holding Trade Value Shares
Change
Shares
Change %
Renaissance Technologies
26
Renaissance Technologies
New York
$4.55M +$1.52M +80,400 +50%
JPMorgan Chase & Co
27
JPMorgan Chase & Co
New York
$4.51M -$1.89M -100,345 -30%
HI
28
HBK Investments
Texas
$4.37M +$1.72M +91,200 +65%
HA
29
Harbor Advisors
Florida
$4.35M +$94.3K +5,000 +2%
Russell Investments Group
30
Russell Investments Group
United Kingdom
$4.19M -$842K -44,647 -17%
RA
31
Royce & Associates
New York
$4.16M -$2.74M -145,400 -40%
PPA
32
Parametric Portfolio Associates
Washington
$4.14M +$79.8K +4,229 +2%
Bank of New York Mellon
33
Bank of New York Mellon
New York
$4.08M +$232K +12,326 +6%
LSV Asset Management
34
LSV Asset Management
Illinois
$4.03M +$1.63M +86,200 +68%
AFA
35
Alta Fundamental Advisers
New York
$3.96M +$3.02M +160,000 +320%
GCP
36
GSA Capital Partners
United Kingdom
$3.92M +$2.35M +124,372 +149%
Morgan Stanley
37
Morgan Stanley
New York
$3.73M -$2.96M -156,911 -44%
Wellington Management Group
38
Wellington Management Group
Massachusetts
$3.71M +$2.58K +137 +0.1%
DMK
39
David M. Knott
$3.21M
GAM
40
Goldentree Asset Management
New York
$3.21M -$795K -42,157 -20%
OAM
41
Oxford Asset Management
United Kingdom
$3.1M -$3.62K -192 -0.1%
TCIM
42
TIAA CREF Investment Management
New York
$3.02M -$349K -18,482 -10%
Ameriprise
43
Ameriprise
Minnesota
$2.99M -$334K -17,725 -10%
Norges Bank
44
Norges Bank
Norway
$2.71M +$1.99M +105,380 +273%
SCP
45
Seizert Capital Partners
Michigan
$2.66M +$2.66M +140,874 New
American Century Companies
46
American Century Companies
Missouri
$2.5M +$808K +42,848 +48%
Jacobs Levy Equity Management
47
Jacobs Levy Equity Management
New Jersey
$2.41M +$664K +35,210 +38%
Millennium Management
48
Millennium Management
New York
$2.39M +$1.42M +75,380 +147%
BCM
49
Bridgeway Capital Management
Texas
$2.28M +$130K +6,900 +6%
CA
50
Corrado Advisors
New Jersey
$2.26M +$177K +9,400 +8%