BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

MASON STREET ADVISORS, LLC's Holding History (CIK: 0001167711)

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

Q4 2020
Shares 21,228 Value ($000) $5,198 Avg Close $259.08 Range $223.25 - $363.92
Q3 2020
Shares 22,235 Value ($000) $6,308 Avg Close $278.91 Range $261.87 - $312.00
Q2 2020
Shares 23,297 Value ($000) $6,233 Avg Close $300.59 Range $257.60 - $350.24
Q1 2020
Shares 25,745 Value ($000) $8,145 Avg Close $303.47 Range $262.25 - $374.99
Q4 2019
Shares 25,745 Value ($000) $7,639 Avg Close $277.46 Range $219.70 - $318.00
Q3 2019
Shares 26,278 Value ($000) $6,118 Avg Close $232.85 Range $215.78 - $246.99
Q2 2019
Shares 27,653 Value ($000) $6,467 Avg Close $230.90 Range $219.20 - $245.35
Q1 2019
Shares 28,063 Value ($000) $6,634 Avg Close $314.89 Range $216.12 - $344.00
Q4 2018
Shares 28,406 Value ($000) $8,548 Avg Close $319.14 Range $278.46 - $358.41
Q3 2018
Shares 28,319 Value ($000) $10,005 Avg Close $344.30 Range $288.13 - $388.67
Q2 2018
Shares 29,605 Value ($000) $8,593 Avg Close $281.15 Range $249.17 - $310.91
Q1 2018
Shares 29,470 Value ($000) $8,069 Avg Close $310.41 Range $259.76 - $370.57
Q4 2017
Shares 29,451 Value ($000) $9,382 Avg Close $320.80 Range $301.81 - $348.84
Q3 2017
Shares 29,351 Value ($000) $9,190 Avg Close $296.11 Range $269.50 - $330.00
Q2 2017
Shares 29,648 Value ($000) $8,045 Avg Close $264.42 Range $244.28 - $291.90
Q1 2017
Shares 29,836 Value ($000) $8,158 Avg Close $282.75 Range $260.50 - $301.42
Q4 2016
Shares 29,763 Value ($000) $8,440 Avg Close $296.43 Range $268.00 - $329.83
Q2 2016
Shares 29,505 Value ($000) $7,135 Avg Close $263.54 Range $223.02 - $292.69
Q1 2016
Shares 29,128 Value ($000) $7,583 Avg Close $264.15 Range $242.07 - $301.02
Q4 2015
Shares 29,120 Value ($000) $8,921 Avg Close $287.35 Range $254.00 - $311.65
Q3 2015
Shares 30,428 Value ($000) $8,879 Avg Close $330.23 Range $265.00 - $412.24
Q2 2015
Shares 30,289 Value ($000) $12,235 Avg Close $401.33 Range $368.88 - $432.88
Q1 2015
Shares 30,215 Value ($000) $12,758 Avg Close $394.14 Range $334.40 - $480.18
Q4 2014
Shares 125,221 Value ($000) $42,506 Avg Close $323.51 Range $290.85 - $361.93
Q3 2014
Shares 120,686 Value ($000) $39,924 Avg Close $329.72 Range $298.31 - $349.00
Q2 2014
Shares 120,946 Value ($000) $38,135 Avg Close $300.97 Range $272.02 - $322.25
Q1 2014
Shares 115,859 Value ($000) $35,438 Avg Close $317.43 Range $270.62 - $358.89
Q4 2013
Shares 102,511 Value ($000) $28,677 Avg Close $258.65 Range $221.07 - $298.82
Q3 2013
Shares 91,598 Value ($000) $22,053 Avg Close $223.81 Range $203.55 - $248.95
Q2 2013
Shares 129,930 Value ($000) $27,961 Avg Close $213.68 Range $191.80 - $242.64