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Israel Englander’s Atara Biotherapeutics ATRA Stock Holding History

Israel Englander’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
2021
Q1 		– Sell
-400
Closed -$196K – 5894
2020
Q4 		$196K Buy
+400
New +$185K ﹤0.01% 4818
2019
Q2 		– Sell
-572
Closed -$568K – 4035
2019
Q1 		$568K Buy
+572
New +$531K ﹤0.01% 3189
2018
Q3 		– Sell
-4,000
Closed -$3.67M – 3873
2018
Q2 		$3.67M Buy
+4,000
New +$4.3M ﹤0.01% 2004

Other funds holding ATRA

EC
EcoR1 Capital San Francisco, California $2.06B AUM 215.32% 1-Year Est. Return
Adage Capital Partners
Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return
Point72 Asset Management
Point72 Asset Management Stamford, Connecticut $90.7B AUM 77.13% 1-Year Est. Return
RG
Redmile Group San Francisco, California $1.49B AUM 208.7% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Mackenzie Financial
Mackenzie Financial Toronto Ontario, Ontario, Canada $100B AUM 36.93% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
SCA
STALEY CAPITAL ADVISERS Pittsburgh, Pennsylvania $2.57B AUM 26.96% 1-Year Est. Return
Vanguard Fiduciary Trust
Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM

Israel Englander's ATRA Position: Q2 2026 in Review

Israel Englander reduced its Atara Biotherapeutics (ATRA) stake by 73% in Q2 2026, selling an estimated $279K and leaving 12,680 shares worth $146K. The position accounts for ﹤0.01% of the portfolio, ranked #5404.

Israel Englander first reported a position in ATRA in Q4 2015 and has held it in 29 quarters since. The position peaked at $6.38M in Q1 2019. 36 funds tracked by Wall St. Rank hold ATRA as of Q2 2026.

  • Israel Englander held 12,680 shares of Atara Biotherapeutics worth $146K as of Q2 2026.
  • Israel Englander sold 35,009 Atara Biotherapeutics shares in Q2 2026, an estimated $279K.
  • Atara Biotherapeutics made up ﹤0.01% of Israel Englander's portfolio in Q2 2026, its #5404 holding.
  • Israel Englander first reported a position in Atara Biotherapeutics in Q4 2015 and has held it in 29 quarters since.
  • Israel Englander's Atara Biotherapeutics position peaked at $6.38M in Q1 2019.
  • 36 funds tracked by Wall St. Rank held Atara Biotherapeutics as of Q2 2026.

Based on Millennium Management's 13F filing for Q2 2026, filed 14 Aug 2026.