BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Clearbridge Investments, LLC's Holding History (CIK: 0001348883)

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

Q4 2024

Shares 1,584 Value ($000) $242 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 601,986 Value ($000) $116,689 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 1,468,822 Value ($000) $340,502 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 1,561,660 Value ($000) $336,741 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 1,679,302 Value ($000) $434,553 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 1,823,182 Value ($000) $468,576 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 1,827,664 Value ($000) $520,610 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 1,864,745 Value ($000) $518,455 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 1,805,575 Value ($000) $500,000 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 1,875,640 Value ($000) $500,796 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 1,967,210 Value ($000) $401,193 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 2,510,992 Value ($000) $528,815 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 2,523,402 Value ($000) $605,415 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 3,363,927 Value ($000) $951,958 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 3,565,112 Value ($000) $1,234,491 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 3,969,044 Value ($000) $1,110,340 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 3,598,673 Value ($000) $881,171 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 4,016,684 Value ($000) $1,139,453 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 4,080,646 Value ($000) $1,091,777 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 4,407,311 Value ($000) $1,394,385 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 5,138,098 Value ($000) $1,511,834 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 6,232,677 Value ($000) $1,451,092 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 6,279,098 Value ($000) $1,468,493 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 8,592,357 Value ($000) $2,031,061 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 8,729,845 Value ($000) $2,626,985 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 8,845,449 Value ($000) $3,125,186 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 9,529,087 Value ($000) $2,765,722 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 9,188,259 Value ($000) $2,515,929 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 9,141,651 Value ($000) $2,912,256 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 9,250,827 Value ($000) $2,896,619 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 9,293,900 Value ($000) $2,521,993 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 9,121,025 Value ($000) $2,493,871 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 8,769,801 Value ($000) $2,486,940 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 8,467,583 Value ($000) $2,650,608 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 8,271,679 Value ($000) $2,000,258 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 8,465,459 Value ($000) $2,203,728 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 8,569,908 Value ($000) $2,625,391 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 8,583,624 Value ($000) $2,504,787 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 8,001,867 Value ($000) $3,232,274 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 8,025,241 Value ($000) $3,388,578 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 8,231,670 Value ($000) $2,794,241 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 7,889,763 Value ($000) $2,610,013 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 7,893,874 Value ($000) $2,489,018 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 7,703,484 Value ($000) $2,356,265 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 8,204,333 Value ($000) $2,293,702 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 8,226,362 Value ($000) $1,980,579 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 8,265,256 Value ($000) $1,778,684 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2024	1,584	$242	$168.67	$145.07 - $195.00
Q3 2024	601,986	$116,689	$209.21	$188.78 - $238.00
Q2 2024	1,468,822	$340,502	$217.32	$189.44 - $237.54
Q1 2024	1,561,660	$336,741	$234.20	$211.02 - $268.30
Q4 2023	1,679,302	$434,553	$245.62	$220.86 - $269.43
Q3 2023	1,823,182	$468,576	$267.47	$251.85 - $287.60
Q2 2023	1,827,664	$520,610	$297.86	$273.39 - $319.76
Q1 2023	1,864,745	$518,455	$276.70	$254.80 - $295.90
Q4 2022	1,805,575	$500,000	$282.44	$250.31 - $311.88
Q3 2022	1,875,640	$500,796	$212.38	$193.65 - $283.44
Q2 2022	1,967,210	$401,193	$204.43	$187.16 - $225.50
Q1 2022	2,510,992	$528,815	$217.46	$192.67 - $249.00
Q4 2021	2,523,402	$605,415	$257.12	$221.72 - $290.76
Q3 2021	3,363,927	$951,958	$327.75	$282.64 - $372.12
Q2 2021	3,565,112	$1,234,491	$302.94	$257.03 - $468.55
Q1 2021	3,969,044	$1,110,340	$269.69	$238.40 - $296.38
Q4 2020	3,598,673	$881,171	$259.08	$223.25 - $363.92
Q3 2020	4,016,684	$1,139,453	$278.91	$261.87 - $312.00
Q2 2020	4,080,646	$1,091,777	$300.59	$257.60 - $350.24
Q1 2020	4,407,311	$1,394,385	$303.47	$262.25 - $374.99
Q4 2019	5,138,098	$1,511,834	$277.46	$219.70 - $318.00
Q3 2019	6,232,677	$1,451,092	$232.85	$215.78 - $246.99
Q2 2019	6,279,098	$1,468,493	$230.90	$219.20 - $245.35
Q1 2019	8,592,357	$2,031,061	$314.89	$216.12 - $344.00
Q4 2018	8,729,845	$2,626,985	$319.14	$278.46 - $358.41
Q3 2018	8,845,449	$3,125,186	$344.30	$288.13 - $388.67
Q2 2018	9,529,087	$2,765,722	$281.15	$249.17 - $310.91
Q1 2018	9,188,259	$2,515,929	$310.41	$259.76 - $370.57
Q4 2017	9,141,651	$2,912,256	$320.80	$301.81 - $348.84
Q3 2017	9,250,827	$2,896,619	$296.11	$269.50 - $330.00
Q2 2017	9,293,900	$2,521,993	$264.42	$244.28 - $291.90
Q1 2017	9,121,025	$2,493,871	$282.75	$260.50 - $301.42
Q4 2016	8,769,801	$2,486,940	$296.43	$268.00 - $329.83
Q3 2016	8,467,583	$2,650,608	$296.18	$240.07 - $333.65
Q2 2016	8,271,679	$2,000,258	$263.54	$223.02 - $292.69
Q1 2016	8,465,459	$2,203,728	$264.15	$242.07 - $301.02
Q4 2015	8,569,908	$2,625,391	$287.35	$254.00 - $311.65
Q3 2015	8,583,624	$2,504,787	$330.23	$265.00 - $412.24
Q2 2015	8,001,867	$3,232,274	$401.33	$368.88 - $432.88
Q1 2015	8,025,241	$3,388,578	$394.14	$334.40 - $480.18
Q4 2014	8,231,670	$2,794,241	$323.51	$290.85 - $361.93
Q3 2014	7,889,763	$2,610,013	$329.72	$298.31 - $349.00
Q2 2014	7,893,874	$2,489,018	$300.97	$272.02 - $322.25
Q1 2014	7,703,484	$2,356,265	$317.43	$270.62 - $358.89
Q4 2013	8,204,333	$2,293,702	$258.65	$221.07 - $298.82
Q3 2013	8,226,362	$1,980,579	$223.81	$203.55 - $248.95
Q2 2013	8,265,256	$1,778,684	$213.68	$191.80 - $242.64