Warren Buffett - Berkshire Hathaway
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    29
Portfolio value:    $263,095,703,570
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
2021   Q2 0 0.00 Sell 100.00% 0.07 $257.03–468.55 · VW $330.25i SEC
2021   Q1 643,022 0.07 $279.75 $179,885,000 SEC
2020   Q4 643,022 0.06 $244.86 $157,450,000 SEC
2020   Q3 643,022 0.08 $283.68 $182,412,000 SEC
2020   Q2 643,022 0.08 $267.55 $172,041,000 SEC
2020   Q1 643,022 0.12 Reduce 0.84% <0.01 $262.25–374.99 · VW $302.72i $203,440,000 SEC
2019   Q4 648,447 0.08 Buy 0.08 $219.70–318.00 · VW $286.11i $192,414,000 SEC
Price snapshot:
Current price$209.03
52-week low$121.05
52-week high$219.72