Carl Icahn - Icahn Carl C
Period:    Q1 2026
Portfolio date:    31 Mar 2026
No. of stocks:    12
Portfolio value:    $8,553,640,766
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
2011   Q2 0 0.00 Sell 100.00% 3.53 $72.70–109.63 · VW $96.61i SEC
2011   Q1 3,215,051 3.53 $73.39 $235,953,000 SEC
2010   Q4 3,215,051 3.71 $67.05 $215,569,000 SEC
2010   Q3 3,215,051 3.29 $56.12 $180,429,000 SEC
2010   Q2 3,215,051 3.26 $47.45 $152,554,000 SEC
2010   Q1 3,215,051 3.32 $57.36 $184,415,000 SEC
2009   Q4 3,215,051 3.85 $53.50 $172,005,000 SEC
2009   Q3 3,215,051 6.11 $50.52 $162,424,000 SEC
2009   Q2 3,215,051 3.71 $45.15 $145,160,000 SEC
2009   Q1 3,215,051 6.09 $52.42 $168,533,000 SEC
2008   Q4 3,215,051 5.95 Reduce 8.20% 0.29 $37.21–52.36 · VW $44.15i $153,133,000 SEC
2008   Q3 3,502,261 3.49 Add 40.81% 1.01 $45.37–73.59 · VW $55.59i $176,129,000 SEC
2008   Q2 2,487,181 4.62 $55.89 $139,009,000 SEC
2008   Q1 2,487,181 4.18 Add 20.49% 0.71 $54.50–64.49 · VW $59.88i $153,434,000 SEC
2007   Q4 2,064,181 3.40 Buy 3.40 $53.65–84.75 · VW $70.31i $117,493,000 SEC
Price snapshot:
Current price$209.03
52-week low$121.05
52-week high$219.72