Seth Klarman - Baupost Group
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    22
Portfolio value:    $5,115,380,000
Holdings Activity Buys Sells    History
Holding/activity history for  Atara Biotherapeutics Inc (ATRA)
Period Shares % of Portfolio Activity % Change to Portfolio Reported Price Value Filing
2023   Q4 0 0.00 Sell 100.00% 0.28 SEC
2023   Q3 9,773,616 0.28 $1.48 $14,465,000 SEC
2023   Q2 9,773,616 0.29 Add 7.12% 0.02 $1.61 $15,736,000 SEC
2023   Q1 9,123,616 0.47 Add 12.31% 0.05 $2.90 $26,458,000 SEC
2022   Q4 8,123,616 0.45 $3.28 $26,645,000 SEC
2022   Q3 8,123,616 0.55 $3.78 $30,707,000 SEC
2022   Q2 8,123,616 0.98 $7.79 $63,283,000 SEC
2022   Q1 8,123,616 0.84 Reduce 4.17% 0.06 $9.29 $75,468,000 SEC
2021   Q4 8,477,488 1.36 $15.76 $133,605,000 SEC
2021   Q3 8,477,488 1.41 $17.90 $151,747,000 SEC
2021   Q2 8,477,488 1.08 $15.55 $131,825,000 SEC
2021   Q1 8,477,488 0.98 Reduce 6.93% 0.12 $14.36 $121,737,000 SEC
2020   Q4 9,108,988 1.68 Reduce 8.19% 0.11 $19.63 $178,809,000 SEC
2020   Q3 9,922,030 1.39 $12.96 $128,590,000 SEC
2020   Q2 9,922,030 1.81 Add 19.41% 0.29 $14.57 $144,564,000 SEC
2020   Q1 8,308,900 1.05 $8.51 $70,709,000 SEC
2019   Q4 8,308,900 1.59 $16.47 $136,848,000 SEC
2019   Q3 8,308,900 1.46 Add 18.70% 0.23 $14.12 $117,322,000 SEC
2019   Q2 7,000,000 1.38 Add 9.71% 0.12 $20.11 $140,770,000 SEC
2019   Q1 6,380,519 2.28 Add 2.01% 0.05 $39.75 $253,626,000 SEC
2018   Q4 6,254,632 1.97 $34.74 $217,286,000 SEC
2018   Q3 6,254,632 2.03 $41.35 $258,629,000 SEC
2018   Q2 6,254,632 2.07 $36.75 $229,858,000 SEC
2018   Q1 6,254,632 2.38 Add 16.70% 0.34 $39.00 $243,931,000 SEC
2017   Q4 5,359,632 0.97 $18.10 $97,009,000 SEC
2017   Q3 5,359,632 1.13 $16.55 $88,702,000 SEC
2017   Q2 5,359,632 0.90 $14.00 $75,035,000 SEC
2017   Q1 5,359,632 1.33 $20.55 $110,140,000 SEC
2016   Q4 5,359,632 1.02 $14.20 $76,107,000 SEC
2016   Q3 5,359,632 1.69 $21.39 $114,643,000 SEC
2016   Q2 5,359,632 1.69 $22.51 $120,645,000 SEC
2016   Q1 5,359,632 1.51 $19.03 $101,994,000 SEC
2015   Q4 5,359,632 2.79 $26.41 $141,548,000 SEC
2015   Q3 5,359,632 3.01 Add 11.44% 0.31 $31.44 $168,507,000 SEC
2015   Q2 4,809,632 4.81 Add 0.97% 0.05 $52.76 $253,756,000 SEC
2015   Q1 4,763,265 3.55 Add 90.84% 1.69 $40.48 $192,802,000 SEC
2014   Q4 2,495,913 1.27 Buy 1.27 $23.69 $59,137,000 SEC