Jane Street
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Jane Street’s Atara Biotherapeutics ATRA Stock Holding History

Jane Street’s Portfolio ATRA Stock Details ATRA Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$160K Buy
33,870
+19,880
+142% +$121K ﹤0.01% 10334
2025
Q4 		$253K Sell
13,990
-8,070
-37% -$120K ﹤0.01% 9210
2025
Q3 		$316K Buy
+22,060
New +$254K ﹤0.01% 8794
2024
Q2 		– Sell
-2,506
Closed -$43.5K – 9325
2024
Q1 		$43.5K Sell
2,506
-2,781
-53% -$49.4K ﹤0.01% 8772
2023
Q4 		$67.8K Buy
5,287
+4,351
+465% +$101K ﹤0.01% 8697
2023
Q3 		$34.6K Sell
936
-16,735
-95% -$745K ﹤0.01% 8224
2023
Q2 		$711K Buy
17,671
+16,941
+2,321% +$958K ﹤0.01% 5765
2023
Q1 		$52.9K Sell
730
-5,190
-88% -$503K ﹤0.01% 8433
2022
Q4 		$485K Buy
5,920
+2,803
+90% +$292K ﹤0.01% 6184
2022
Q3 		$295K Buy
3,117
+2,111
+210% +$237K ﹤0.01% 7617
2022
Q2 		$195K Buy
+1,006
New +$164K ﹤0.01% 8209
2022
Q1 		– Sell
-527
Closed -$168K – 10249
2021
Q4 		$208K Sell
527
-420
-44% -$177K ﹤0.01% 8759
2021
Q3 		$424K Buy
947
+356
+60% +$128K ﹤0.01% 7586
2021
Q2 		$229K Sell
591
-285
-33% -$102K ﹤0.01% 8609
2021
Q1 		$314K Sell
876
-343
-28% -$152K ﹤0.01% 7635
2020
Q4 		$598K Sell
1,219
-3,106
-72% -$1.43M ﹤0.01% 5464
2020
Q3 		$1.4M Buy
4,325
+3,644
+535% +$1.24M ﹤0.01% 3558
2020
Q2 		$248K Buy
+681
New +$172K ﹤0.01% 6109
2020
Q1 		– Sell
-2,273
Closed -$936K – 5270
2019
Q4 		$936K Buy
2,273
+1,377
+154% +$475K ﹤0.01% 2870
2019
Q3 		$316K Buy
+896
New +$334K ﹤0.01% 4115
2015
Q4 		– Sell
-339
Closed -$267K – 3965
2015
Q3 		$267K Buy
+339
New +$413K ﹤0.01% 2905

Other funds holding ATRA

Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $64.8B AUM 42.7% 1-Year Est. Return
RG
Redmile Group San Francisco, California $1.51B AUM 164.17% 1-Year Est. Return
Mackenzie Financial
Mackenzie Financial Toronto Ontario, Ontario, Canada $83.3B AUM 31.19% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Point72 Asset Management
Point72 Asset Management Stamford, Connecticut $78.1B AUM 55.25% 1-Year Est. Return
Acadian Asset Management
Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return
EC
EcoR1 Capital San Francisco, California $2.36B AUM 204.53% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

Jane Street's ATRA Position: Q1 2026 in Review

Jane Street increased its Atara Biotherapeutics (ATRA) stake by 142% in Q1 2026, buying an estimated $121K and bringing the position to 33,870 shares worth $160K. The position accounts for ﹤0.01% of the portfolio, ranked #10334.

Jane Street first reported a position in ATRA in Q3 2015 and has held it in 21 quarters since. The position peaked at $1.4M in Q3 2020. 33 funds tracked by Wall St. Rank hold ATRA as of Q1 2026.

  • Jane Street held 33,870 shares of Atara Biotherapeutics worth $160K as of Q1 2026.
  • Jane Street bought 19,880 Atara Biotherapeutics shares in Q1 2026, an estimated $121K.
  • Atara Biotherapeutics made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #10334 holding.
  • Jane Street first reported a position in Atara Biotherapeutics in Q3 2015 and has held it in 21 quarters since.
  • Jane Street's Atara Biotherapeutics position peaked at $1.4M in Q3 2020.
  • 33 funds tracked by Wall St. Rank held Atara Biotherapeutics as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.