BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Rockefeller Capital Management L.P.'s Holding History (CIK: 0001739439)

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

Q4 2025

Shares 5,007 Value ($000) $881 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 5,175 Value ($000) $725 Avg Close $135.17 Range $121.05 - $150.28

Q2 2023

Shares 8,019 Value ($000) $2,279 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 10,356 Value ($000) $3 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 6,465 Value ($000) $2 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 6,165 Value ($000) $1,645 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 6,357 Value ($000) $1,295 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 6,534 Value ($000) $1,375 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 6,201 Value ($000) $1,487 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 13,420 Value ($000) $3,797 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 15,571 Value ($000) $5,391 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 18,911 Value ($000) $5,289 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 14,969 Value ($000) $3,664 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 22,943 Value ($000) $6,507 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 23,965 Value ($000) $6,412 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 24,504 Value ($000) $7,752 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 16,365 Value ($000) $4,856 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 20,557 Value ($000) $4,786 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 250,097 Value ($000) $58,490 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 254,251 Value ($000) $60,100 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 326,998 Value ($000) $98,400 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 321,622 Value ($000) $113,632 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 284,573 Value ($000) $82,595 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 287,864 Value ($000) $78,823 Avg Close $310.41 Range $259.76 - $370.57

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	5,007	$881	$163.37	$138.00 - $185.17
Q3 2025	5,175	$725	$135.17	$121.05 - $150.28
Q2 2023	8,019	$2,279	$297.86	$273.39 - $319.76
Q1 2023	10,356	$3	$276.70	$254.80 - $295.90
Q4 2022	6,465	$2	$282.44	$250.31 - $311.88
Q3 2022	6,165	$1,645	$212.38	$193.65 - $283.44
Q2 2022	6,357	$1,295	$204.43	$187.16 - $225.50
Q1 2022	6,534	$1,375	$217.46	$192.67 - $249.00
Q4 2021	6,201	$1,487	$257.12	$221.72 - $290.76
Q3 2021	13,420	$3,797	$327.75	$282.64 - $372.12
Q2 2021	15,571	$5,391	$302.94	$257.03 - $468.55
Q1 2021	18,911	$5,289	$269.69	$238.40 - $296.38
Q4 2020	14,969	$3,664	$259.08	$223.25 - $363.92
Q3 2020	22,943	$6,507	$278.91	$261.87 - $312.00
Q2 2020	23,965	$6,412	$300.59	$257.60 - $350.24
Q1 2020	24,504	$7,752	$303.47	$262.25 - $374.99
Q4 2019	16,365	$4,856	$277.46	$219.70 - $318.00
Q3 2019	20,557	$4,786	$232.85	$215.78 - $246.99
Q2 2019	250,097	$58,490	$230.90	$219.20 - $245.35
Q1 2019	254,251	$60,100	$314.89	$216.12 - $344.00
Q4 2018	326,998	$98,400	$319.14	$278.46 - $358.41
Q3 2018	321,622	$113,632	$344.30	$288.13 - $388.67
Q2 2018	284,573	$82,595	$281.15	$249.17 - $310.91
Q1 2018	287,864	$78,823	$310.41	$259.76 - $370.57