BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Bellevue Group AG's Holding History (CIK: 0001674546)

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

Q4 2025

Shares 3,565 Value ($000) $627 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 4,213 Value ($000) $590 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 402 Value ($000) $50 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 402 Value ($000) $55 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 2,652 Value ($000) $406 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 2,634 Value ($000) $511 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 5,902 Value ($000) $1,368 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 6,008 Value ($000) $1,296 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 8,485 Value ($000) $2,196 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 17,314 Value ($000) $4,450 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 25,598 Value ($000) $7,292 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 24,704 Value ($000) $6,868 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 28,404 Value ($000) $7,866 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 28,735 Value ($000) $7,672 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 21,850 Value ($000) $4,456 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 22,350 Value ($000) $4,707 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 525,000 Value ($000) $125,958 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 527,000 Value ($000) $149,136 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 528,100 Value ($000) $182,865 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 558,400 Value ($000) $156,213 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 564,000 Value ($000) $138,101 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 8,600 Value ($000) $2,440 Avg Close $278.91 Range $261.87 - $312.00

Q1 2020

Shares 8,500 Value ($000) $2,689 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 500 Value ($000) $148 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 32,350 Value ($000) $7,532 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 29,550 Value ($000) $6,911 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 8,450 Value ($000) $1,997 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 25,250 Value ($000) $7,598 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 39,245 Value ($000) $13,866 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 39,345 Value ($000) $11,419 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 46,200 Value ($000) $12,650 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 52,300 Value ($000) $16,661 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 58,900 Value ($000) $18,443 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 61,500 Value ($000) $16,689 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 53,500 Value ($000) $14,628 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 49,000 Value ($000) $13,895 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 54,500 Value ($000) $17,060 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 54,500 Value ($000) $13,179 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 76,540 Value ($000) $19,925 Avg Close $264.15 Range $242.07 - $301.02

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,565	$627	$163.37	$138.00 - $185.17
Q3 2025	4,213	$590	$135.17	$121.05 - $150.28
Q2 2025	402	$50	$124.60	$110.04 - $137.32
Q1 2025	402	$55	$142.96	$128.51 - $157.09
Q4 2024	2,652	$406	$168.67	$145.07 - $195.00
Q3 2024	2,634	$511	$209.21	$188.78 - $238.00
Q2 2024	5,902	$1,368	$217.32	$189.44 - $237.54
Q1 2024	6,008	$1,296	$234.20	$211.02 - $268.30
Q4 2023	8,485	$2,196	$245.62	$220.86 - $269.43
Q3 2023	17,314	$4,450	$267.47	$251.85 - $287.60
Q2 2023	25,598	$7,292	$297.86	$273.39 - $319.76
Q1 2023	24,704	$6,868	$276.70	$254.80 - $295.90
Q4 2022	28,404	$7,866	$282.44	$250.31 - $311.88
Q3 2022	28,735	$7,672	$212.38	$193.65 - $283.44
Q2 2022	21,850	$4,456	$204.43	$187.16 - $225.50
Q1 2022	22,350	$4,707	$217.46	$192.67 - $249.00
Q4 2021	525,000	$125,958	$257.12	$221.72 - $290.76
Q3 2021	527,000	$149,136	$327.75	$282.64 - $372.12
Q2 2021	528,100	$182,865	$302.94	$257.03 - $468.55
Q1 2021	558,400	$156,213	$269.69	$238.40 - $296.38
Q4 2020	564,000	$138,101	$259.08	$223.25 - $363.92
Q3 2020	8,600	$2,440	$278.91	$261.87 - $312.00
Q1 2020	8,500	$2,689	$303.47	$262.25 - $374.99
Q4 2019	500	$148	$277.46	$219.70 - $318.00
Q3 2019	32,350	$7,532	$232.85	$215.78 - $246.99
Q2 2019	29,550	$6,911	$230.90	$219.20 - $245.35
Q1 2019	8,450	$1,997	$314.89	$216.12 - $344.00
Q4 2018	25,250	$7,598	$319.14	$278.46 - $358.41
Q3 2018	39,245	$13,866	$344.30	$288.13 - $388.67
Q2 2018	39,345	$11,419	$281.15	$249.17 - $310.91
Q1 2018	46,200	$12,650	$310.41	$259.76 - $370.57
Q4 2017	52,300	$16,661	$320.80	$301.81 - $348.84
Q3 2017	58,900	$18,443	$296.11	$269.50 - $330.00
Q2 2017	61,500	$16,689	$264.42	$244.28 - $291.90
Q1 2017	53,500	$14,628	$282.75	$260.50 - $301.42
Q4 2016	49,000	$13,895	$296.43	$268.00 - $329.83
Q3 2016	54,500	$17,060	$296.18	$240.07 - $333.65
Q2 2016	54,500	$13,179	$263.54	$223.02 - $292.69
Q1 2016	76,540	$19,925	$264.15	$242.07 - $301.02