BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

SECTORAL ASSET MANAGEMENT INC's Holding History (CIK: 0001274413)

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

Q4 2025

Shares 2,155 Value ($000) $379 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 2,375 Value ($000) $333 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 2,375 Value ($000) $298 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 2,855 Value ($000) $391 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 3,852 Value ($000) $589 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 6,027 Value ($000) $1,168 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 6,137 Value ($000) $1,423 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 6,967 Value ($000) $1,502 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 15,827 Value ($000) $4,096 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 15,012 Value ($000) $3,858 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 14,066 Value ($000) $4,007 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 13,002 Value ($000) $3,615 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 13,352 Value ($000) $3,697 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 13,252 Value ($000) $3,538 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 13,502 Value ($000) $2,754 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 17,202 Value ($000) $3,623 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 17,082 Value ($000) $4,098 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 19,432 Value ($000) $5,499 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 19,432 Value ($000) $6,729 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 12,482 Value ($000) $3,492 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 12,782 Value ($000) $3,130 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 22,632 Value ($000) $6,420 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 6,392 Value ($000) $1,710 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 35,992 Value ($000) $11,387 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 32,542 Value ($000) $9,656 Avg Close $277.46 Range $219.70 - $318.00

Q4 2018

Shares 18,301 Value ($000) $5,507 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 1,662 Value ($000) $587 Avg Close $344.30 Range $288.13 - $388.67

Q1 2017

Shares 11,711 Value ($000) $3,202 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 84,841 Value ($000) $24,059 Avg Close $296.43 Range $268.00 - $329.83

Q1 2016

Shares 234,572 Value ($000) $61,064 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 290,889 Value ($000) $89,114 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 625,096 Value ($000) $182,409 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 487,432 Value ($000) $196,893 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 498,212 Value ($000) $210,365 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 439,428 Value ($000) $149,164 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 514,406 Value ($000) $170,171 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 561,379 Value ($000) $177,008 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 536,393 Value ($000) $164,067 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 544,575 Value ($000) $152,248 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 286,200 Value ($000) $68,906 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 283,300 Value ($000) $60,966 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	2,155	$379	$163.37	$138.00 - $185.17
Q3 2025	2,375	$333	$135.17	$121.05 - $150.28
Q2 2025	2,375	$298	$124.60	$110.04 - $137.32
Q1 2025	2,855	$391	$142.96	$128.51 - $157.09
Q4 2024	3,852	$589	$168.67	$145.07 - $195.00
Q3 2024	6,027	$1,168	$209.21	$188.78 - $238.00
Q2 2024	6,137	$1,423	$217.32	$189.44 - $237.54
Q1 2024	6,967	$1,502	$234.20	$211.02 - $268.30
Q4 2023	15,827	$4,096	$245.62	$220.86 - $269.43
Q3 2023	15,012	$3,858	$267.47	$251.85 - $287.60
Q2 2023	14,066	$4,007	$297.86	$273.39 - $319.76
Q1 2023	13,002	$3,615	$276.70	$254.80 - $295.90
Q4 2022	13,352	$3,697	$282.44	$250.31 - $311.88
Q3 2022	13,252	$3,538	$212.38	$193.65 - $283.44
Q2 2022	13,502	$2,754	$204.43	$187.16 - $225.50
Q1 2022	17,202	$3,623	$217.46	$192.67 - $249.00
Q4 2021	17,082	$4,098	$257.12	$221.72 - $290.76
Q3 2021	19,432	$5,499	$327.75	$282.64 - $372.12
Q2 2021	19,432	$6,729	$302.94	$257.03 - $468.55
Q1 2021	12,482	$3,492	$269.69	$238.40 - $296.38
Q4 2020	12,782	$3,130	$259.08	$223.25 - $363.92
Q3 2020	22,632	$6,420	$278.91	$261.87 - $312.00
Q2 2020	6,392	$1,710	$300.59	$257.60 - $350.24
Q1 2020	35,992	$11,387	$303.47	$262.25 - $374.99
Q4 2019	32,542	$9,656	$277.46	$219.70 - $318.00
Q4 2018	18,301	$5,507	$319.14	$278.46 - $358.41
Q3 2018	1,662	$587	$344.30	$288.13 - $388.67
Q1 2017	11,711	$3,202	$282.75	$260.50 - $301.42
Q4 2016	84,841	$24,059	$296.43	$268.00 - $329.83
Q1 2016	234,572	$61,064	$264.15	$242.07 - $301.02
Q4 2015	290,889	$89,114	$287.35	$254.00 - $311.65
Q3 2015	625,096	$182,409	$330.23	$265.00 - $412.24
Q2 2015	487,432	$196,893	$401.33	$368.88 - $432.88
Q1 2015	498,212	$210,365	$394.14	$334.40 - $480.18
Q4 2014	439,428	$149,164	$323.51	$290.85 - $361.93
Q3 2014	514,406	$170,171	$329.72	$298.31 - $349.00
Q2 2014	561,379	$177,008	$300.97	$272.02 - $322.25
Q1 2014	536,393	$164,067	$317.43	$270.62 - $358.89
Q4 2013	544,575	$152,248	$258.65	$221.07 - $298.82
Q3 2013	286,200	$68,906	$223.81	$203.55 - $248.95
Q2 2013	283,300	$60,966	$213.68	$191.80 - $242.64