BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

CSS LLC/IL's Holding History (CIK: 0001103646)

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

Q4 2025
Shares 6,080 Value ($000) $1,070 Avg Close $163.37 Range $138.00 - $185.17
Q3 2025
Shares 7,750 Value ($000) $1,086 Avg Close $135.17 Range $121.05 - $150.28
Q2 2025
Shares 6,920 Value ($000) $869 Avg Close $124.60 Range $110.04 - $137.32
Q1 2025
Shares 3,730 Value ($000) $510 Avg Close $142.96 Range $128.51 - $157.09
Q3 2022
Shares 6,378 Value ($000) $1,703 Avg Close $212.38 Range $193.65 - $283.44
Q4 2021
Shares 2,800 Value ($000) $672 Avg Close $257.12 Range $221.72 - $290.76
Q2 2021
Shares 1,832 Value ($000) $634 Avg Close $302.94 Range $257.03 - $468.55
Q1 2021
Shares 11,121 Value ($000) $3,111 Avg Close $269.69 Range $238.40 - $296.38
Q4 2020
Shares 15,089 Value ($000) $3,695 Avg Close $259.08 Range $223.25 - $363.92
Q2 2020
Shares 19,196 Value ($000) $5,136 Avg Close $300.59 Range $257.60 - $350.24
Q1 2020
Shares 820 Value ($000) $259 Avg Close $303.47 Range $262.25 - $374.99