BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

GW&K Investment Management, LLC's Holding History (CIK: 0001082917)

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

Q4 2025
Shares 239 Value ($000) $0 Avg Close $163.37 Range $138.00 - $185.17
Q3 2025
Shares 239 Value ($000) $0 Avg Close $135.17 Range $121.05 - $150.28
Q2 2025
Shares 260 Value ($000) $0 Avg Close $124.60 Range $110.04 - $137.32
Q1 2025
Shares 92 Value ($000) $0 Avg Close $142.96 Range $128.51 - $157.09
Q4 2024
Shares 112 Value ($000) $0 Avg Close $168.67 Range $145.07 - $195.00
Q3 2024
Shares 53 Value ($000) $0 Avg Close $209.21 Range $188.78 - $238.00
Q2 2024
Shares 50 Value ($000) $0 Avg Close $217.32 Range $189.44 - $237.54
Q1 2024
Shares 54 Value ($000) $0 Avg Close $234.20 Range $211.02 - $268.30
Q4 2023
Shares 50 Value ($000) $0 Avg Close $245.62 Range $220.86 - $269.43
Q3 2023
Shares 49 Value ($000) $0 Avg Close $267.47 Range $251.85 - $287.60
Q2 2023
Shares 54 Value ($000) $0 Avg Close $297.86 Range $273.39 - $319.76
Q2 2022
Shares 18 Value ($000) $4 Avg Close $204.43 Range $187.16 - $225.50
Q1 2022
Shares 30 Value ($000) $6 Avg Close $217.46 Range $192.67 - $249.00