BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

UBS ASSET MANAGEMENT AMERICAS INC's Holding History (CIK: 0000861177)

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

Q4 2025

Shares 1,391,370 Value ($000) $244,867 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 1,439,208 Value ($000) $201,604 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 1,743,209 Value ($000) $218,930 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 1,510,386 Value ($000) $206,681 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 1,533,813 Value ($000) $234,551 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 1,152,691 Value ($000) $223,438 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 1,133,786 Value ($000) $262,834 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 972,143 Value ($000) $209,623 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 1,014,583 Value ($000) $262,544 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 1,065,518 Value ($000) $273,849 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 1,114,602 Value ($000) $309,893 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 1,114,602 Value ($000) $309,893 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 1,094,191 Value ($000) $303,003 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 1,116,456 Value ($000) $298,093,752 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 1,157,263 Value ($000) $236,012,216 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 1,163,312 Value ($000) $244,993,507 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 1,159,302 Value ($000) $278,139,736 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 1,244,986 Value ($000) $352,318,590 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 1,138,473 Value ($000) $394,219,047 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 1,159,784 Value ($000) $324,449,576 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 1,190,397 Value ($000) $291,480,607 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 1,329,648 Value ($000) $377,194,546 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 1,308,771 Value ($000) $350,161,680 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 1,094,458 Value ($000) $346,264,622 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 1,107,351 Value ($000) $328,584,263 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 1,159,149 Value ($000) $269,873,069 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 1,380,379 Value ($000) $322,829,238 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 1,296,314 Value ($000) $306,422,705 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 1,143,666 Value ($000) $344,151,971 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 1,452,894 Value ($000) $513,321,979 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 1,101,656 Value ($000) $319,744,637 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 1,001,266 Value ($000) $274,166,658 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 832,769 Value ($000) $265,295,221 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 791,847 Value ($000) $247,943,132 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 829,144 Value ($000) $224,996,516 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 1,454,878 Value ($000) $397,792,743 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 1,463,392 Value ($000) $414,990 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 1,529,045 Value ($000) $478,636 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 1,138,139 Value ($000) $275,225 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 1,124,950 Value ($000) $292,847 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 958,416 Value ($000) $293,610 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 1,134,500 Value ($000) $331,057 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 1,166,412 Value ($000) $471,160 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 1,171,479 Value ($000) $494,644 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 1,224,670 Value ($000) $415,714 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 1,913,925 Value ($000) $633,145 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 1,870,618 Value ($000) $589,825 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 1,764,066 Value ($000) $539,575 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 1,622,467 Value ($000) $453,886 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 2,106,546 Value ($000) $507,172 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 2,226,869 Value ($000) $479,222 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,391,370	$244,867	$163.37	$138.00 - $185.17
Q3 2025	1,439,208	$201,604	$135.17	$121.05 - $150.28
Q2 2025	1,743,209	$218,930	$124.60	$110.04 - $137.32
Q1 2025	1,510,386	$206,681	$142.96	$128.51 - $157.09
Q4 2024	1,533,813	$234,551	$168.67	$145.07 - $195.00
Q3 2024	1,152,691	$223,438	$209.21	$188.78 - $238.00
Q2 2024	1,133,786	$262,834	$217.32	$189.44 - $237.54
Q1 2024	972,143	$209,623	$234.20	$211.02 - $268.30
Q4 2023	1,014,583	$262,544	$245.62	$220.86 - $269.43
Q3 2023	1,065,518	$273,849	$267.47	$251.85 - $287.60
Q2 2023	1,114,602	$309,893	$297.86	$273.39 - $319.76
Q1 2023	1,114,602	$309,893	$276.70	$254.80 - $295.90
Q4 2022	1,094,191	$303,003	$282.44	$250.31 - $311.88
Q3 2022	1,116,456	$298,093,752	$212.38	$193.65 - $283.44
Q2 2022	1,157,263	$236,012,216	$204.43	$187.16 - $225.50
Q1 2022	1,163,312	$244,993,507	$217.46	$192.67 - $249.00
Q4 2021	1,159,302	$278,139,736	$257.12	$221.72 - $290.76
Q3 2021	1,244,986	$352,318,590	$327.75	$282.64 - $372.12
Q2 2021	1,138,473	$394,219,047	$302.94	$257.03 - $468.55
Q1 2021	1,159,784	$324,449,576	$269.69	$238.40 - $296.38
Q4 2020	1,190,397	$291,480,607	$259.08	$223.25 - $363.92
Q3 2020	1,329,648	$377,194,546	$278.91	$261.87 - $312.00
Q2 2020	1,308,771	$350,161,680	$300.59	$257.60 - $350.24
Q1 2020	1,094,458	$346,264,622	$303.47	$262.25 - $374.99
Q4 2019	1,107,351	$328,584,263	$277.46	$219.70 - $318.00
Q3 2019	1,159,149	$269,873,069	$232.85	$215.78 - $246.99
Q2 2019	1,380,379	$322,829,238	$230.90	$219.20 - $245.35
Q1 2019	1,296,314	$306,422,705	$314.89	$216.12 - $344.00
Q4 2018	1,143,666	$344,151,971	$319.14	$278.46 - $358.41
Q3 2018	1,452,894	$513,321,979	$344.30	$288.13 - $388.67
Q2 2018	1,101,656	$319,744,637	$281.15	$249.17 - $310.91
Q1 2018	1,001,266	$274,166,658	$310.41	$259.76 - $370.57
Q4 2017	832,769	$265,295,221	$320.80	$301.81 - $348.84
Q3 2017	791,847	$247,943,132	$296.11	$269.50 - $330.00
Q2 2017	829,144	$224,996,516	$264.42	$244.28 - $291.90
Q1 2017	1,454,878	$397,792,743	$282.75	$260.50 - $301.42
Q4 2016	1,463,392	$414,990	$296.43	$268.00 - $329.83
Q3 2016	1,529,045	$478,636	$296.18	$240.07 - $333.65
Q2 2016	1,138,139	$275,225	$263.54	$223.02 - $292.69
Q1 2016	1,124,950	$292,847	$264.15	$242.07 - $301.02
Q4 2015	958,416	$293,610	$287.35	$254.00 - $311.65
Q3 2015	1,134,500	$331,057	$330.23	$265.00 - $412.24
Q2 2015	1,166,412	$471,160	$401.33	$368.88 - $432.88
Q1 2015	1,171,479	$494,644	$394.14	$334.40 - $480.18
Q4 2014	1,224,670	$415,714	$323.51	$290.85 - $361.93
Q3 2014	1,913,925	$633,145	$329.72	$298.31 - $349.00
Q2 2014	1,870,618	$589,825	$300.97	$272.02 - $322.25
Q1 2014	1,764,066	$539,575	$317.43	$270.62 - $358.89
Q4 2013	1,622,467	$453,886	$258.65	$221.07 - $298.82
Q3 2013	2,106,546	$507,172	$223.81	$203.55 - $248.95
Q2 2013	2,226,869	$479,222	$213.68	$191.80 - $242.64