BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Senator Investment Group LP's Holding History (CIK: 0001443689)

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

Q1 2023
Shares 40,000 Value ($000) $11,121 Avg Close $276.70 Range $254.80 - $295.90
Q4 2022
Shares 50,000 Value ($000) $13,846 Avg Close $282.44 Range $250.31 - $311.88
Q2 2017
Shares 500,000 Value ($000) $135,680 Avg Close $264.42 Range $244.28 - $291.90
Q3 2016
Shares 655,000 Value ($000) $205,035 Avg Close $296.18 Range $240.07 - $333.65
Q2 2016
Shares 500,000 Value ($000) $120,910 Avg Close $263.54 Range $223.02 - $292.69
Q1 2016
Shares 200,000 Value ($000) $52,064 Avg Close $264.15 Range $242.07 - $301.02
Q4 2015
Shares 300,000 Value ($000) $91,905 Avg Close $287.35 Range $254.00 - $311.65
Q3 2015
Shares 350,000 Value ($000) $102,134 Avg Close $330.23 Range $265.00 - $412.24