BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Maryland State Retirement & Pension System's Holding History (CIK: 0001795552)

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

Q4 2025

Shares 7,381 Value ($000) $1,299 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 7,381 Value ($000) $1,034 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 6,809 Value ($000) $855 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 6,809 Value ($000) $932 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 8,064 Value ($000) $1,233 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 8,304 Value ($000) $1,610 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 11,211 Value ($000) $2,599 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 11,211 Value ($000) $2,176 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 11,211 Value ($000) $2,901 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 11,001 Value ($000) $2,827 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 11,001 Value ($000) $3,134 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 11,318 Value ($000) $3,147 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 11,318 Value ($000) $3,134 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 11,318 Value ($000) $3,022 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 11,318 Value ($000) $2,308 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 11,318 Value ($000) $2,384 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 11,318 Value ($000) $2,715 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 11,318 Value ($000) $3,238 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 11,318 Value ($000) $3,903 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 11,752 Value ($000) $3,288 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 2,486 Value ($000) $718 Avg Close $259.08 Range $223.25 - $363.92

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	7,381	$1,299	$163.37	$138.00 - $185.17
Q3 2025	7,381	$1,034	$135.17	$121.05 - $150.28
Q2 2025	6,809	$855	$124.60	$110.04 - $137.32
Q1 2025	6,809	$932	$142.96	$128.51 - $157.09
Q4 2024	8,064	$1,233	$168.67	$145.07 - $195.00
Q3 2024	8,304	$1,610	$209.21	$188.78 - $238.00
Q2 2024	11,211	$2,599	$217.32	$189.44 - $237.54
Q1 2024	11,211	$2,176	$234.20	$211.02 - $268.30
Q4 2023	11,211	$2,901	$245.62	$220.86 - $269.43
Q3 2023	11,001	$2,827	$267.47	$251.85 - $287.60
Q2 2023	11,001	$3,134	$297.86	$273.39 - $319.76
Q1 2023	11,318	$3,147	$276.70	$254.80 - $295.90
Q4 2022	11,318	$3,134	$282.44	$250.31 - $311.88
Q3 2022	11,318	$3,022	$212.38	$193.65 - $283.44
Q2 2022	11,318	$2,308	$204.43	$187.16 - $225.50
Q1 2022	11,318	$2,384	$217.46	$192.67 - $249.00
Q4 2021	11,318	$2,715	$257.12	$221.72 - $290.76
Q3 2021	11,318	$3,238	$327.75	$282.64 - $372.12
Q2 2021	11,318	$3,903	$302.94	$257.03 - $468.55
Q1 2021	11,752	$3,288	$269.69	$238.40 - $296.38
Q4 2020	2,486	$718	$259.08	$223.25 - $363.92