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Atara Biotherapeutics
ATRA

Overview Fund Activity

37 hedge funds and large institutions have $12.4M invested in Atara Biotherapeutics in 2025 Q1 according to their latest regulatory filings, with 5 funds opening new positions, 8 increasing their positions, 13 reducing their positions, and 11 closing their positions.

Holders
37
Holders Change
-6
Holders Change %
-13.95%
% of All Funds
0.5%
Holding in Top 10
–
Holding in Top 10 Change
–
Holding in Top 10 Change %
–
% of All Funds
–
New
5
Increased
8
Reduced
13
Closed
11
Calls
–
Puts
–
Net Calls
–
Net Calls Change
–

Top Buyers

1
EC
1
EcoR1 Capital
California
$3.4M
2
Susquehanna International Group
2
Susquehanna International Group
Pennsylvania
$244K
3
SCA
3
STALEY CAPITAL ADVISERS
Pennsylvania
$475K
4
UBS Group
4
UBS Group
Switzerland
$145K
5
GCP
5
GSA Capital Partners
United Kingdom
$115K

Top Sellers

1
Citadel Advisors
1
Citadel Advisors
Florida
$0
2
Marshall Wace
2
Marshall Wace
United Kingdom
$0
3
Renaissance Technologies
3
Renaissance Technologies
New York
$104K
4
VPC
4
Vestal Point Capital
New York
$559K
5
CSS
5
Cubist Systematic Strategies
Connecticut
$0
Name Market Value Shares Shares
Change 		Shares
Change %
EC
1
EcoR1 Capital
California
$3.4M 573,183 +41,049 +8%
RG
2
Redmile Group
California
$2.62M 441,701 – –
Vanguard Group
3
Vanguard Group
Pennsylvania
$1.13M 190,761 +11,979 +7%
Bank of America
4
Bank of America
North Carolina
$1.11M 187,297 -17,873 -9%
Acadian Asset Management
5
Acadian Asset Management
Massachusetts
$682K 115,111 -9,362 -8%
VPC
6
Vestal Point Capital
New York
$559K 94,085 -30,915 -25%
SCA
7
STALEY CAPITAL ADVISERS
Pennsylvania
$475K 80,000 +30,000 +60%
TCM
8
Tang Capital Management
California
$447K 75,196 – –
BlackRock
9
BlackRock
New York
$361K 60,798 -48 -0.1%
Geode Capital Management
10
Geode Capital Management
Massachusetts
$349K 58,679 +3,935 +7%
Susquehanna International Group
11
Susquehanna International Group
Pennsylvania
$244K 41,014 +41,014 New
State Street
12
State Street
Massachusetts
$150K 25,253 – –
UBS Group
13
UBS Group
Switzerland
$145K 24,334 +23,500 +2,818%
BC
14
Birchview Capital
Vermont
$131K 22,000 – –
GCP
15
GSA Capital Partners
United Kingdom
$115K 19,385 +19,385 New
Renaissance Technologies
16
Renaissance Technologies
New York
$104K 17,436 -49,704 -74%
Fidelity Investments
17
Fidelity Investments
Massachusetts
$102K 17,157 -9,542 -36%
BCM
18
Bridgeway Capital Management
Texas
$83.2K 14,000 – –
Morgan Stanley
19
Morgan Stanley
New York
$70.3K 11,828 -16,523 -58%
Northern Trust
20
Northern Trust
Illinois
$66.4K 11,170 – –
SS
21
SBI Securities
Japan
$8.34K 1,404 -12 -0.8%
Wells Fargo
22
Wells Fargo
California
$5.65K 951 – –
Royal Bank of Canada
23
Royal Bank of Canada
Ontario, Canada
$5K 850 +767 +924%
Jones Financial Companies
24
Jones Financial Companies
Missouri
$4.59K 703 +500 +246%
SW
25
SVB Wealth
Massachusetts
$2.5K 421 +421 New
1
2