Lee Ainslie - Maverick Capital
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    239
Portfolio value:    $8,599,101,588
Holdings Activity Buys Sells    History
Holding/activity history for  Biogen Inc. (BIIB)
← All BIIB superinvestors
Period Shares % of Portfolio Activity % Change to Portfolio Price Value Filing
2024   Q1 0 0.00 Sell 100.00% <0.01 $211.02–268.30 · VW $231.16i SEC
2023   Q4 1,600 <0.01 Buy <0.01 $220.86–269.43 · VW $244.33i $414,032 SEC
2023   Q3 0 0.00 Sell 100.00% <0.01 $251.85–287.60 · VW $267.60i SEC
2023   Q2 983 <0.01 Buy <0.01 $273.39–319.76 · VW $297.10i $280,008 SEC
2021   Q4 0 0.00 Sell 100.00% <0.01 $221.72–290.76 · VW $252.61i SEC
2021   Q3 3,112 <0.01 Buy <0.01 $282.64–372.12 · VW $326.71i $881,000 SEC
2020   Q4 0 0.00 Sell 100.00% 0.01 $223.25–363.92 · VW $265.43i SEC
2020   Q3 1,436 0.01 Reduce 68.10% 0.02 $261.87–312.00 · VW $282.52i $407,000 SEC
2020   Q2 4,501 0.03 Buy 0.03 $257.60–350.24 · VW $298.78i $1,204,000 SEC
2019   Q4 0 0.00 Sell 100.00% 0.02 $219.70–318.00 · VW $286.11i SEC
2019   Q3 4,919 0.02 Buy 0.02 $215.78–246.99 · VW $231.92i $1,145,000 SEC
2017   Q3 0 0.00 Sell 100.00% 0.05 $269.50–330.00 · VW $301.52i SEC
2017   Q2 15,230 0.05 Add 58.48% 0.02 $244.28–291.90 · VW $266.52i $4,133,000 SEC
2017   Q1 9,610 0.03 Reduce 11.67% <0.01 $260.50–301.42 · VW $281.28i $2,628,000 SEC
2016   Q4 10,880 0.04 Add 4.82% <0.01 $268.00–329.83 · VW $292.03i $3,085,000 SEC
2016   Q3 10,380 0.04 Reduce 5.72% <0.01 $240.07–333.65 · VW $298.36i $3,249,000 SEC
2016   Q2 11,010 0.04 Add 17.50% <0.01 $223.02–292.69 · VW $265.44i $2,662,000 SEC
2016   Q1 9,370 0.04 Buy 0.04 $242.07–301.02 · VW $266.24i $2,439,000 SEC
2009   Q2 0 0.00 Sell 100.00% 0.22 $44.56–55.34 · VW $49.22i SEC
2009   Q1 212,857 0.22 Reduce 88.56% 1.72 $42.92–53.66 · VW $48.95i $11,158,000 SEC
2008   Q4 1,860,560 1.94 Buy 1.94 $37.21–52.36 · VW $44.15i $88,618,000 SEC
2008   Q1 0 0.00 Sell 100.00% 0.70 $54.50–64.49 · VW $59.88i SEC
2007   Q4 1,166,940 0.70 Buy 0.70 $53.65–84.75 · VW $70.31i $66,422,000 SEC
2006   Q2 0 0.00 Sell 100.00% 1.27 $42.52–48.97 · VW $45.83i SEC
2006   Q1 1,845,114 1.27 Add 129.17% 0.72 $43.03–50.72 · VW $46.71i $86,905,000 SEC
2005   Q4 805,114 0.43 Buy 0.43 $35.66–46.72 · VW $41.97i $36,456,000 SEC
2004   Q1 0 0.00 Sell 100.00% 1.32 $36.60–59.63 · VW $50.05i SEC
2003   Q4 2,895,000 1.32 Buy 1.32 $31.63–39.41 · VW $35.86i $106,247,000 SEC
Price snapshot:
Current price$209.03
52-week low$121.05
52-week high$219.72