BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q3 2023

Shares 4,235 Value ($000) $1,088 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 5,012 Value ($000) $1,428 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 5,012 Value ($000) $1,393 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 5,372 Value ($000) $1 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 6,674 Value ($000) $1,782 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 4,544 Value ($000) $927 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 4,734 Value ($000) $997 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 12,582 Value ($000) $3,019 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 12,648 Value ($000) $3,579 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 12,548 Value ($000) $4,345 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 12,840 Value ($000) $3,592 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 13,354 Value ($000) $3,270 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 14,684 Value ($000) $4,166 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 11,297 Value ($000) $3,023 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 23,624 Value ($000) $7,474 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 29,079 Value ($000) $8,629 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 9,200 Value ($000) $2,142 Avg Close $232.85 Range $215.78 - $246.99

Q1 2019

Shares 153 Value ($000) $36 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 23,068 Value ($000) $6,942 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 50,700 Value ($000) $17,913 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 30,400 Value ($000) $8,823 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 32,192 Value ($000) $8,815 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 34,820 Value ($000) $11,093 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 37,631 Value ($000) $11,783 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 28,442 Value ($000) $7,718 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 24,763 Value ($000) $6,771 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 29,942 Value ($000) $8,491 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 10,100 Value ($000) $3,162 Avg Close $296.18 Range $240.07 - $333.65

Q1 2016

Shares 10,880 Value ($000) $2,832 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 10,713 Value ($000) $3,282 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 3,469 Value ($000) $1,012 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 3,235 Value ($000) $1,307 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 10,533 Value ($000) $4,447 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 15,274 Value ($000) $5,185 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 14,548 Value ($000) $4,813 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 14,548 Value ($000) $4,587 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 15,183 Value ($000) $4,644 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 13,901 Value ($000) $3,886 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 1,760 Value ($000) $424 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 1,619 Value ($000) $348 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2023	4,235	$1,088	$267.47	$251.85 - $287.60
Q2 2023	5,012	$1,428	$297.86	$273.39 - $319.76
Q1 2023	5,012	$1,393	$276.70	$254.80 - $295.90
Q4 2022	5,372	$1	$282.44	$250.31 - $311.88
Q3 2022	6,674	$1,782	$212.38	$193.65 - $283.44
Q2 2022	4,544	$927	$204.43	$187.16 - $225.50
Q1 2022	4,734	$997	$217.46	$192.67 - $249.00
Q4 2021	12,582	$3,019	$257.12	$221.72 - $290.76
Q3 2021	12,648	$3,579	$327.75	$282.64 - $372.12
Q2 2021	12,548	$4,345	$302.94	$257.03 - $468.55
Q1 2021	12,840	$3,592	$269.69	$238.40 - $296.38
Q4 2020	13,354	$3,270	$259.08	$223.25 - $363.92
Q3 2020	14,684	$4,166	$278.91	$261.87 - $312.00
Q2 2020	11,297	$3,023	$300.59	$257.60 - $350.24
Q1 2020	23,624	$7,474	$303.47	$262.25 - $374.99
Q4 2019	29,079	$8,629	$277.46	$219.70 - $318.00
Q3 2019	9,200	$2,142	$232.85	$215.78 - $246.99
Q1 2019	153	$36	$314.89	$216.12 - $344.00
Q4 2018	23,068	$6,942	$319.14	$278.46 - $358.41
Q3 2018	50,700	$17,913	$344.30	$288.13 - $388.67
Q2 2018	30,400	$8,823	$281.15	$249.17 - $310.91
Q1 2018	32,192	$8,815	$310.41	$259.76 - $370.57
Q4 2017	34,820	$11,093	$320.80	$301.81 - $348.84
Q3 2017	37,631	$11,783	$296.11	$269.50 - $330.00
Q2 2017	28,442	$7,718	$264.42	$244.28 - $291.90
Q1 2017	24,763	$6,771	$282.75	$260.50 - $301.42
Q4 2016	29,942	$8,491	$296.43	$268.00 - $329.83
Q3 2016	10,100	$3,162	$296.18	$240.07 - $333.65
Q1 2016	10,880	$2,832	$264.15	$242.07 - $301.02
Q4 2015	10,713	$3,282	$287.35	$254.00 - $311.65
Q3 2015	3,469	$1,012	$330.23	$265.00 - $412.24
Q2 2015	3,235	$1,307	$401.33	$368.88 - $432.88
Q1 2015	10,533	$4,447	$394.14	$334.40 - $480.18
Q4 2014	15,274	$5,185	$323.51	$290.85 - $361.93
Q3 2014	14,548	$4,813	$329.72	$298.31 - $349.00
Q2 2014	14,548	$4,587	$300.97	$272.02 - $322.25
Q1 2014	15,183	$4,644	$317.43	$270.62 - $358.89
Q4 2013	13,901	$3,886	$258.65	$221.07 - $298.82
Q3 2013	1,760	$424	$223.81	$203.55 - $248.95
Q2 2013	1,619	$348	$213.68	$191.80 - $242.64