BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

T. Rowe Price Investment Management, Inc.'s Holding History (CIK: 0001897612)

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

Q4 2025
Shares 778,461 Value ($000) $137 Avg Close $163.37 Range $138.00 - $185.17
Q3 2025
Shares 1,067,482 Value ($000) $150 Avg Close $135.17 Range $121.05 - $150.28
Q2 2025
Shares 1,394,476 Value ($000) $175 Avg Close $124.60 Range $110.04 - $137.32
Q1 2025
Shares 2,660,290 Value ($000) $364 Avg Close $142.96 Range $128.51 - $157.09
Q4 2024
Shares 3,099,786 Value ($000) $474 Avg Close $168.67 Range $145.07 - $195.00
Q3 2024
Shares 4,256,286 Value ($000) $825 Avg Close $209.21 Range $188.78 - $238.00
Q2 2024
Shares 5,678,859 Value ($000) $1,316 Avg Close $217.32 Range $189.44 - $237.54
Q1 2024
Shares 5,169,970 Value ($000) $1,115 Avg Close $234.20 Range $211.02 - $268.30
Q4 2023
Shares 5,357,326 Value ($000) $1,386 Avg Close $245.62 Range $220.86 - $269.43
Q3 2023
Shares 4,754,991 Value ($000) $1,222 Avg Close $267.47 Range $251.85 - $287.60
Q2 2023
Shares 3,399,070 Value ($000) $968 Avg Close $297.86 Range $273.39 - $319.76