BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO's Holding History (CIK: 0001141802)

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

Q4 2025

Shares 6,584 Value ($000) $1,159 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 5,930 Value ($000) $831 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 5,803 Value ($000) $729 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 5,532 Value ($000) $757 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 5,355 Value ($000) $819 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 6,669 Value ($000) $1,293 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 7,309 Value ($000) $1,694 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 6,766 Value ($000) $1,459 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 7,314 Value ($000) $1,893 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 7,180 Value ($000) $1,845 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 9,102 Value ($000) $2,593 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 6,729 Value ($000) $1,871 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 6,461 Value ($000) $1,789 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 6,450 Value ($000) $1,722 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 6,379 Value ($000) $1,302 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 5,863 Value ($000) $1,234 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 4,752 Value ($000) $1,140 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 5,293 Value ($000) $1,499 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 5,330 Value ($000) $1,846 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 15,104 Value ($000) $4,226 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 12,573 Value ($000) $3,078 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 10,848 Value ($000) $3,077 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 7,341 Value ($000) $1,964 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 4,836 Value ($000) $1,530 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 5,139 Value ($000) $1,526 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 7,240 Value ($000) $1,686 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 7,808 Value ($000) $1,827 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 10,903 Value ($000) $2,578 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 31,331 Value ($000) $9,427 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 31,266 Value ($000) $11,046 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 30,566 Value ($000) $8,872 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 30,785 Value ($000) $8,430 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 30,158 Value ($000) $9,608 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 30,149 Value ($000) $9,439 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 28,195 Value ($000) $7,651 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 26,022 Value ($000) $7,115 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 13,090 Value ($000) $3,712 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 6,838 Value ($000) $2,140 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 4,504 Value ($000) $1,089 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 3,284 Value ($000) $855 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 3,005 Value ($000) $921 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 1,798 Value ($000) $525 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 1,729 Value ($000) $698 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 1,336 Value ($000) $565 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 668 Value ($000) $227 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 569 Value ($000) $188 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 644 Value ($000) $203 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 624 Value ($000) $191 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 851 Value ($000) $238 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 681 Value ($000) $164 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 608 Value ($000) $130 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	6,584	$1,159	$163.37	$138.00 - $185.17
Q3 2025	5,930	$831	$135.17	$121.05 - $150.28
Q2 2025	5,803	$729	$124.60	$110.04 - $137.32
Q1 2025	5,532	$757	$142.96	$128.51 - $157.09
Q4 2024	5,355	$819	$168.67	$145.07 - $195.00
Q3 2024	6,669	$1,293	$209.21	$188.78 - $238.00
Q2 2024	7,309	$1,694	$217.32	$189.44 - $237.54
Q1 2024	6,766	$1,459	$234.20	$211.02 - $268.30
Q4 2023	7,314	$1,893	$245.62	$220.86 - $269.43
Q3 2023	7,180	$1,845	$267.47	$251.85 - $287.60
Q2 2023	9,102	$2,593	$297.86	$273.39 - $319.76
Q1 2023	6,729	$1,871	$276.70	$254.80 - $295.90
Q4 2022	6,461	$1,789	$282.44	$250.31 - $311.88
Q3 2022	6,450	$1,722	$212.38	$193.65 - $283.44
Q2 2022	6,379	$1,302	$204.43	$187.16 - $225.50
Q1 2022	5,863	$1,234	$217.46	$192.67 - $249.00
Q4 2021	4,752	$1,140	$257.12	$221.72 - $290.76
Q3 2021	5,293	$1,499	$327.75	$282.64 - $372.12
Q2 2021	5,330	$1,846	$302.94	$257.03 - $468.55
Q1 2021	15,104	$4,226	$269.69	$238.40 - $296.38
Q4 2020	12,573	$3,078	$259.08	$223.25 - $363.92
Q3 2020	10,848	$3,077	$278.91	$261.87 - $312.00
Q2 2020	7,341	$1,964	$300.59	$257.60 - $350.24
Q1 2020	4,836	$1,530	$303.47	$262.25 - $374.99
Q4 2019	5,139	$1,526	$277.46	$219.70 - $318.00
Q3 2019	7,240	$1,686	$232.85	$215.78 - $246.99
Q2 2019	7,808	$1,827	$230.90	$219.20 - $245.35
Q1 2019	10,903	$2,578	$314.89	$216.12 - $344.00
Q4 2018	31,331	$9,427	$319.14	$278.46 - $358.41
Q3 2018	31,266	$11,046	$344.30	$288.13 - $388.67
Q2 2018	30,566	$8,872	$281.15	$249.17 - $310.91
Q1 2018	30,785	$8,430	$310.41	$259.76 - $370.57
Q4 2017	30,158	$9,608	$320.80	$301.81 - $348.84
Q3 2017	30,149	$9,439	$296.11	$269.50 - $330.00
Q2 2017	28,195	$7,651	$264.42	$244.28 - $291.90
Q1 2017	26,022	$7,115	$282.75	$260.50 - $301.42
Q4 2016	13,090	$3,712	$296.43	$268.00 - $329.83
Q3 2016	6,838	$2,140	$296.18	$240.07 - $333.65
Q2 2016	4,504	$1,089	$263.54	$223.02 - $292.69
Q1 2016	3,284	$855	$264.15	$242.07 - $301.02
Q4 2015	3,005	$921	$287.35	$254.00 - $311.65
Q3 2015	1,798	$525	$330.23	$265.00 - $412.24
Q2 2015	1,729	$698	$401.33	$368.88 - $432.88
Q1 2015	1,336	$565	$394.14	$334.40 - $480.18
Q4 2014	668	$227	$323.51	$290.85 - $361.93
Q3 2014	569	$188	$329.72	$298.31 - $349.00
Q2 2014	644	$203	$300.97	$272.02 - $322.25
Q1 2014	624	$191	$317.43	$270.62 - $358.89
Q4 2013	851	$238	$258.65	$221.07 - $298.82
Q3 2013	681	$164	$223.81	$203.55 - $248.95
Q2 2013	608	$130	$213.68	$191.80 - $242.64