BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

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

Q4 2025
Shares 792,071 Value ($000) $139 Avg Close $163.37 Range $138.00 - $185.17
Q3 2025
Shares 965,457 Value ($000) $135 Avg Close $135.17 Range $121.05 - $150.28
Q2 2025
Shares 833,927 Value ($000) $105 Avg Close $124.60 Range $110.04 - $137.32
Q1 2025
Shares 1,151,192 Value ($000) $158 Avg Close $142.96 Range $128.51 - $157.09
Q4 2024
Shares 1,933,716 Value ($000) $296 Avg Close $168.67 Range $145.07 - $195.00
Q3 2024
Shares 1,912,546 Value ($000) $371 Avg Close $209.21 Range $188.78 - $238.00
Q2 2024
Shares 2,011,411 Value ($000) $466 Avg Close $217.32 Range $189.44 - $237.54
Q1 2024
Shares 1,589,629 Value ($000) $343 Avg Close $234.20 Range $211.02 - $268.30
Q4 2023
Shares 1,508,346 Value ($000) $390 Avg Close $245.62 Range $220.86 - $269.43
Q3 2023
Shares 1,163,530 Value ($000) $299 Avg Close $267.47 Range $251.85 - $287.60
Q2 2023
Shares 1,128,642 Value ($000) $321 Avg Close $297.86 Range $273.39 - $319.76
Q1 2023
Shares 2,088,356 Value ($000) $581 Avg Close $276.70 Range $254.80 - $295.90
Q4 2022
Shares 1,396,513 Value ($000) $387 Avg Close $282.44 Range $250.31 - $311.88
Q3 2022
Shares 1,534,515 Value ($000) $409,717 Avg Close $212.38 Range $193.65 - $283.44
Q2 2022
Shares 1,030,931 Value ($000) $210,248 Avg Close $204.43 Range $187.16 - $225.50
Q1 2022
Shares 1,075,969 Value ($000) $226,599 Avg Close $217.46 Range $192.67 - $249.00
Q4 2021
Shares 1,131,357 Value ($000) $271,435 Avg Close $257.12 Range $221.72 - $290.76
Q3 2021
Shares 1,784,136 Value ($000) $504,893 Avg Close $327.75 Range $282.64 - $372.12
Q2 2021
Shares 1,612,563 Value ($000) $558,382 Avg Close $302.94 Range $257.03 - $468.55
Q1 2021
Shares 1,777,171 Value ($000) $497,164 Avg Close $269.69 Range $238.40 - $296.38
Q4 2020
Shares 1,687,298 Value ($000) $413,152 Avg Close $259.08 Range $223.25 - $363.92
Q3 2020
Shares 1,371,281 Value ($000) $389,005 Avg Close $278.91 Range $261.87 - $312.00
Q2 2020
Shares 1,207,878 Value ($000) $323,168 Avg Close $300.59 Range $257.60 - $350.24
Q1 2020
Shares 4,284,557 Value ($000) $1,355,548 Avg Close $303.47 Range $262.25 - $374.99
Q4 2019
Shares 2,011,912 Value ($000) $596,995 Avg Close $277.46 Range $219.70 - $318.00
Q3 2019
Shares 1,104,654 Value ($000) $257,186 Avg Close $232.85 Range $215.78 - $246.99
Q2 2019
Shares 1,097,770 Value ($000) $256,735 Avg Close $230.90 Range $219.20 - $245.35
Q1 2019
Shares 1,051,889 Value ($000) $248,646 Avg Close $314.89 Range $216.12 - $344.00
Q4 2018
Shares 1,284,006 Value ($000) $386,383 Avg Close $319.14 Range $278.46 - $358.41
Q3 2018
Shares 1,783,142 Value ($000) $630,002 Avg Close $344.30 Range $288.13 - $388.67
Q2 2018
Shares 1,973,631 Value ($000) $572,826 Avg Close $281.15 Range $249.17 - $310.91
Q1 2018
Shares 4,022,099 Value ($000) $1,101,332 Avg Close $310.41 Range $259.76 - $370.57
Q4 2017
Shares 8,534,311 Value ($000) $2,718,776 Avg Close $320.80 Range $301.81 - $348.84
Q3 2017
Shares 10,681,378 Value ($000) $3,344,553 Avg Close $296.11 Range $269.50 - $330.00
Q2 2017
Shares 8,948,782 Value ($000) $2,428,341 Avg Close $264.42 Range $244.28 - $291.90
Q1 2017
Shares 8,118,191 Value ($000) $2,219,676 Avg Close $282.75 Range $260.50 - $301.42
Q4 2016
Shares 8,718,233 Value ($000) $2,472,317 Avg Close $296.43 Range $268.00 - $329.83
Q3 2016
Shares 7,610,028 Value ($000) $2,382,167 Avg Close $296.18 Range $240.07 - $333.65
Q2 2016
Shares 6,366,152 Value ($000) $1,539,463 Avg Close $263.54 Range $223.02 - $292.69
Q1 2016
Shares 8,119,909 Value ($000) $2,113,775 Avg Close $264.15 Range $242.07 - $301.02
Q4 2015
Shares 6,360,432 Value ($000) $1,948,518 Avg Close $287.35 Range $254.00 - $311.65
Q3 2015
Shares 6,027,086 Value ($000) $1,758,764 Avg Close $330.23 Range $265.00 - $412.24
Q2 2015
Shares 10,473,787 Value ($000) $4,230,782 Avg Close $401.33 Range $368.88 - $432.88
Q1 2015
Shares 10,791,562 Value ($000) $4,556,629 Avg Close $394.14 Range $334.40 - $480.18
Q4 2014
Shares 12,176,548 Value ($000) $4,133,329 Avg Close $323.51 Range $290.85 - $361.93
Q3 2014
Shares 12,791,052 Value ($000) $4,231,408 Avg Close $329.72 Range $298.31 - $349.00
Q2 2014
Shares 12,194,641 Value ($000) $3,845,092 Avg Close $300.97 Range $272.02 - $322.25
Q1 2014
Shares 12,178,149 Value ($000) $3,724,930 Avg Close $317.43 Range $270.62 - $358.89
Q4 2013
Shares 11,651,138 Value ($000) $3,259,406 Avg Close $258.65 Range $221.07 - $298.82
Q3 2013
Shares 10,827,196 Value ($000) $2,606,756 Avg Close $223.81 Range $203.55 - $248.95
Q2 2013
Shares 10,948,117 Value ($000) $2,356,035 Avg Close $213.68 Range $191.80 - $242.64