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Atara Biotherapeutics Inc
ATRAAdd to Watchlist
8.380USD
+0.210+2.57%
Close 07-31 16:00（ET）Quotes delayed by 15 min
60.42MMarket Cap
LossP/E TTM
Shareholding Stats
Updated: Thu, May 14
Updated: Thu, May 14
Shareholders
Shareholder Types
Shareholders
Shareholders
Proportion
Panacea Venture
14.64%
Adiumentum Capital Fund I LP
14.26%
EcoR1 Capital, LLC
11.99%
Redmile Group, LLC
4.90%
Mackenzie Financial Corporation
3.48%
Other
50.72%
Shareholders
Shareholders
Proportion
Panacea Venture
14.64%
Adiumentum Capital Fund I LP
14.26%
EcoR1 Capital, LLC
11.99%
Redmile Group, LLC
4.90%
Mackenzie Financial Corporation
3.48%
Other
50.72%
Shareholder Types
Shareholders
Proportion
Venture Capital
19.18%
Investment Advisor/Hedge Fund
16.32%
Corporation
15.10%
Investment Advisor
6.03%
Individual Investor
2.84%
Hedge Fund
1.74%
Research Firm
0.50%
Bank and Trust
0.02%
Other
38.27%
Institutional Shareholding
Updated: Wed, Apr 1
Updated: Wed, Apr 1
Reporting Period
No. of institutions
Shares Held
Proportion
Change
2026Q1
156
3.70M
43.48%
-645.28K
2025Q4
178
3.30M
60.83%
+2.88K
2025Q3
215
3.30M
77.98%
+155.19K
2025Q2
228
3.18M
75.64%
+497.27K
2025Q1
266
2.68M
83.60%
-2.22M
2024Q4
282
2.41M
85.34%
-48.18K
2024Q3
301
2.46M
89.58%
-418.46K
2024Q2
322
2.88M
107.90%
-500.66K
2024Q1
338
3.38M
92.25%
-1.03M
2023Q4
339
2.70M
112.29%
-1.35M
View more
Shareholder Activity
Name
Shares Held
Proportion
Change
Chg %
Date
Panacea Venture
1.63M
19.96%
+259.16K
+18.87%
Mar 17, 2026
Adiumentum Capital Fund I LP
1.28M
15.71%
+151.14K
+13.33%
May 16, 2025
EcoR1 Capital, LLC
573.18K
7.01%
--
--
Dec 31, 2025
Redmile Group, LLC
441.70K
5.4%
--
--
Dec 31, 2025
Mackenzie Financial Corporation
58.67K
0.72%
-5.15K
-8.07%
Dec 31, 2025
Marshall Wace LLP
148.63K
1.82%
+32.84K
+28.36%
Dec 31, 2025
GlobeFlex Capital, L.P.
77.22K
0.94%
+61.77K
+399.57%
Dec 31, 2025
BlackRock Institutional Trust Company, N.A.
65.80K
0.8%
+1.38K
+2.14%
Dec 31, 2025
Geode Capital Management, L.L.C.
62.38K
0.76%
+1.85K
+3.06%
Dec 31, 2025
View more
Related ETFs
Updated: Sat, Dec 6
Updated: Sat, Dec 6
Name
Proportion
iShares Micro-Cap ETF
0.01%
Dimensional US Core Equity 1 ETF
0%
Global X Russell 2000 ETF
0%
iShares Russell 2000 ETF
0%
iShares Russell 3000 ETF
0%
iShares Russell 2000 Value ETF
0%
ProShares UltraPro Russell2000
0%
Proshares Ultra Russell 2000
0%
Harbor Human Capital Factor US Small Cap ETF
0%
ProShares Hedge Replication ETF
0%
View more
iShares Micro-Cap ETF
Proportion0.01%
Dimensional US Core Equity 1 ETF
Proportion0%
Global X Russell 2000 ETF
Proportion0%
iShares Russell 2000 ETF
Proportion0%
iShares Russell 3000 ETF
Proportion0%
iShares Russell 2000 Value ETF
Proportion0%
ProShares UltraPro Russell2000
Proportion0%
Proshares Ultra Russell 2000
Proportion0%
Harbor Human Capital Factor US Small Cap ETF
Proportion0%
ProShares Hedge Replication ETF
Proportion0%