BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Czech National Bank's Holding History (CIK: 0001908923)

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

Q4 2025
Shares 38,683 Value ($000) $6,808 Avg Close $163.37 Range $138.00 - $185.17
Q3 2025
Shares 37,238 Value ($000) $5,216 Avg Close $135.17 Range $121.05 - $150.28
Q2 2025
Shares 35,816 Value ($000) $4,498 Avg Close $124.60 Range $110.04 - $137.32
Q1 2025
Shares 33,620 Value ($000) $4,601 Avg Close $142.96 Range $128.51 - $157.09
Q4 2024
Shares 31,595 Value ($000) $4,832 Avg Close $168.67 Range $145.07 - $195.00
Q3 2024
Shares 29,672 Value ($000) $5,752 Avg Close $209.21 Range $188.78 - $238.00
Q2 2024
Shares 27,744 Value ($000) $6,432 Avg Close $217.32 Range $189.44 - $237.54
Q1 2024
Shares 25,494 Value ($000) $5,497 Avg Close $234.20 Range $211.02 - $268.30
Q4 2023
Shares 25,377 Value ($000) $6,567 Avg Close $245.62 Range $220.86 - $269.43
Q3 2023
Shares 25,312 Value ($000) $6,505 Avg Close $267.47 Range $251.85 - $287.60
Q2 2023
Shares 17,134 Value ($000) $4,881 Avg Close $297.86 Range $273.39 - $319.76
Q1 2023
Shares 16,964 Value ($000) $4,717 Avg Close $276.70 Range $254.80 - $295.90
Q4 2022
Shares 16,855 Value ($000) $4,667 Avg Close $282.44 Range $250.31 - $311.88
Q3 2022
Shares 16,864 Value ($000) $4,503 Avg Close $212.38 Range $193.65 - $283.44