BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

SANDS CAPITAL MANAGEMENT, LLC's Holding History (CIK: 0001020066)

Note: Option positions (PUT/CALL) are excluded.

Q4 2017
Shares 1,138,777 Value ($000) $362,780 Avg Close $320.80 Range $301.81 - $348.84
Q3 2017
Shares 1,207,172 Value ($000) $377,990 Avg Close $296.11 Range $269.50 - $330.00
Q2 2017
Shares 1,278,163 Value ($000) $346,842 Avg Close $264.42 Range $244.28 - $291.90
Q1 2017
Shares 2,475,937 Value ($000) $676,971 Avg Close $282.75 Range $260.50 - $301.42
Q4 2016
Shares 2,578,909 Value ($000) $731,327 Avg Close $296.43 Range $268.00 - $329.83
Q3 2016
Shares 2,789,266 Value ($000) $873,124 Avg Close $296.18 Range $240.07 - $333.65
Q2 2016
Shares 2,970,230 Value ($000) $718,261 Avg Close $263.54 Range $223.02 - $292.69
Q1 2016
Shares 3,141,109 Value ($000) $817,694 Avg Close $264.15 Range $242.07 - $301.02
Q4 2015
Shares 3,367,531 Value ($000) $1,031,643 Avg Close $287.35 Range $254.00 - $311.65
Q3 2015
Shares 4,121,400 Value ($000) $1,202,666 Avg Close $330.23 Range $265.00 - $412.24
Q2 2015
Shares 4,732,945 Value ($000) $1,911,826 Avg Close $401.33 Range $368.88 - $432.88
Q1 2015
Shares 5,009,615 Value ($000) $2,115,260 Avg Close $394.14 Range $334.40 - $480.18
Q4 2014
Shares 4,974,331 Value ($000) $1,688,537 Avg Close $323.51 Range $290.85 - $361.93
Q3 2014
Shares 4,952,096 Value ($000) $1,638,203 Avg Close $329.72 Range $298.31 - $349.00
Q2 2014
Shares 4,891,463 Value ($000) $1,542,327 Avg Close $300.97 Range $272.02 - $322.25
Q1 2014
Shares 4,873,017 Value ($000) $1,490,510 Avg Close $317.43 Range $270.62 - $358.89
Q4 2013
Shares 4,754,160 Value ($000) $1,329,121 Avg Close $258.65 Range $221.07 - $298.82
Q3 2013
Shares 4,635,241 Value ($000) $1,115,981 Avg Close $223.81 Range $203.55 - $248.95
Q2 2013
Shares 4,565,921 Value ($000) $982,586 Avg Close $213.68 Range $191.80 - $242.64