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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 %
Russell Investments Group
26
Russell Investments Group
United Kingdom
$2.19K 368 -351 -49%
Lazard Asset Management
27
Lazard Asset Management
New York
$2K 368 -76 -17%
JPMorgan Chase & Co
28
JPMorgan Chase & Co
New York
$1.28K 216 – –
RBI
29
Raiffeisen Bank International
Austria
$1.19K 200 +200 New
TRCT
30
Tower Research Capital (TRC)
New York
$1.1K 185 +115 +164%
IA
31
IFP Advisors
Florida
$1.07K 180 – –
RhumbLine Advisers
32
RhumbLine Advisers
Massachusetts
$1.04K 175 – –
BT
33
Banque Transatlantique
France
$966 176 – –
Group One Trading
34
Group One Trading
Illinois
$879 148 -246 -62%
BNP Paribas Financial Markets
35
BNP Paribas Financial Markets
France
$297 50 -11 -18%
Osaic Holdings
36
Osaic Holdings
Arizona
$59 10 -600 -98%
Citadel Advisors
37
Citadel Advisors
Florida
– – -267,353 Closed
Marshall Wace
38
Marshall Wace
United Kingdom
– – -24,958 Closed
CSS
39
Cubist Systematic Strategies
Connecticut
– – -12,682 Closed
Millennium Management
40
Millennium Management
New York
– – -10,133 Closed
PAS
41
Point72 Asia (Singapore)
Singapore
– – -3,603 Closed
RS
42
R Squared
Hong Kong
– – -240 Closed
PD
43
Point72 (DIFC)
United Arab Emirates
– – -68 Closed
GI
44
GAMMA Investing
California
– – -56 Closed
EWA
45
EverSource Wealth Advisors
Alabama
– – -35 Closed
AIP
46
Alexis Investment Partners
Texas
– – -28 Closed
Citigroup
47
Citigroup
New York
– – -2 Closed
CFGS
48
Concourse Financial Group Securities
Alabama
– – – –
Barclays
49
Barclays
United Kingdom
$0 1 +1 New
1
2