BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

OSTRUM ASSET MANAGEMENT's Holding History (CIK: 0001767945)

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

Q4 2025

Shares 2,476 Value ($000) $436 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 11,458 Value ($000) $1,605 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 14,525 Value ($000) $1,824 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 14,708 Value ($000) $2,013 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 14,881 Value ($000) $2,276 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 21,904 Value ($000) $4,246 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 21,737 Value ($000) $5,039 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 22,793 Value ($000) $4,915 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 20,310 Value ($000) $5,256 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 11,198 Value ($000) $2,878 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 11,142 Value ($000) $3,174 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 10,422 Value ($000) $2,898 Avg Close $276.70 Range $254.80 - $295.90

Q4 2018

Shares 2,163 Value ($000) $651 Avg Close $319.14 Range $278.46 - $358.41

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	2,476	$436	$163.37	$138.00 - $185.17
Q3 2025	11,458	$1,605	$135.17	$121.05 - $150.28
Q2 2025	14,525	$1,824	$124.60	$110.04 - $137.32
Q1 2025	14,708	$2,013	$142.96	$128.51 - $157.09
Q4 2024	14,881	$2,276	$168.67	$145.07 - $195.00
Q3 2024	21,904	$4,246	$209.21	$188.78 - $238.00
Q2 2024	21,737	$5,039	$217.32	$189.44 - $237.54
Q1 2024	22,793	$4,915	$234.20	$211.02 - $268.30
Q4 2023	20,310	$5,256	$245.62	$220.86 - $269.43
Q3 2023	11,198	$2,878	$267.47	$251.85 - $287.60
Q2 2023	11,142	$3,174	$297.86	$273.39 - $319.76
Q1 2023	10,422	$2,898	$276.70	$254.80 - $295.90
Q4 2018	2,163	$651	$319.14	$278.46 - $358.41