Atara Biotherapeutics, Inc. - Common Stock (ATRA)

Historical Holders from Q2 2024 to Q3 2025

Symbol
ATRA on Nasdaq
CUSIP
046513206
Type / Class
Equity / Common Stock
Shares outstanding
7.23M
All holders as of September 30, 2025
Q3 2025
Total 13F shares, excl. options
1.88M
Holdings value
$27M
% of all portfolios
0%
Grand Portfolio weight change
+0%
Number of holders
35
Number of buys
15
Number of sells
-11
Average Value change %
0%
Average buys %
+0%
Average sells %
0%
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of Atara Biotherapeutics, Inc. - Common Stock (ATRA)

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Redmile Group, LLC 9.9% 0% $9.05M $554K 751K +6.53% Redmile Group, LLC Nov 12, 2025
EcoR1 Capital, LLC 9.9% $8.63M 716K EcoR1 Capital, LLC Sep 30, 2025
Panacea Innovation Ltd 9.5% $3.07M 550K Panacea Venture Healthcare Fund II, L.P. Jan 30, 2025

Institutional Holders of Atara Biotherapeutics, Inc. - Common Stock (ATRA)

Period Reported Shares, Excl. Options Value, Excl. Options Change Price Investors
2025 Q3 1.88M $27M +$1.94M $14.33 35
2025 Q2 1.8M $13.9M -$1.94M $7.72 32
2025 Q1 2.09M $12.4M -$4.02M $5.94 36
2024 Q4 2.37M $31.5M -$411K $13.31 40
2024 Q3 2.41M $19.6M -$1.76M $8.13 33
2024 Q2 2.65M $22.6M +$22.2M $8.50 42