BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

HARTFORD INVESTMENT MANAGEMENT CO's Holding History (CIK: 0000922439)

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

Q4 2025

Shares 8,501 Value ($000) $1,496 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 8,622 Value ($000) $1,208 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 8,791 Value ($000) $1,104 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 8,867 Value ($000) $1,213 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 8,958 Value ($000) $1,370 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 9,132 Value ($000) $1,770 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 9,308 Value ($000) $2,158 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 9,355 Value ($000) $2,017 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 9,762 Value ($000) $2,526 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 12,171 Value ($000) $3,128 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 12,193 Value ($000) $3,473 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 14,222 Value ($000) $3,954 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 18,991 Value ($000) $5 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 19,164 Value ($000) $5,117 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 18,658 Value ($000) $3,805 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 18,483 Value ($000) $3,893 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 19,545 Value ($000) $4,689 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 18,543 Value ($000) $5,247 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 20,489 Value ($000) $7,095 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 20,059 Value ($000) $5,612 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 20,413 Value ($000) $4,998 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 18,092 Value ($000) $5,132 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 19,236 Value ($000) $5,147 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 23,298 Value ($000) $7,371 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 21,568 Value ($000) $6,400 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 22,455 Value ($000) $5,228 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 24,202 Value ($000) $5,660 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 24,328 Value ($000) $5,751 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 24,489 Value ($000) $7,369 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 24,394 Value ($000) $8,619 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 24,606 Value ($000) $7,142 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 41,316 Value ($000) $11,313 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 44,768 Value ($000) $14,262 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 46,715 Value ($000) $14,627 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 47,632 Value ($000) $12,925 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 50,203 Value ($000) $13,727 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 53,591 Value ($000) $15,197 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 54,597 Value ($000) $17,090 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 53,719 Value ($000) $12,990 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 54,735 Value ($000) $14,249 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 55,722 Value ($000) $17,070 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 61,044 Value ($000) $17,813 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 61,013 Value ($000) $24,646 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 65,067 Value ($000) $27,474 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 68,602 Value ($000) $23,287 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 61,552 Value ($000) $20,362 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 63,411 Value ($000) $19,994 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 64,333 Value ($000) $19,678 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 65,774 Value ($000) $18,400 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 70,432 Value ($000) $16,957 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 72,929 Value ($000) $15,694 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	8,501	$1,496	$163.37	$138.00 - $185.17
Q3 2025	8,622	$1,208	$135.17	$121.05 - $150.28
Q2 2025	8,791	$1,104	$124.60	$110.04 - $137.32
Q1 2025	8,867	$1,213	$142.96	$128.51 - $157.09
Q4 2024	8,958	$1,370	$168.67	$145.07 - $195.00
Q3 2024	9,132	$1,770	$209.21	$188.78 - $238.00
Q2 2024	9,308	$2,158	$217.32	$189.44 - $237.54
Q1 2024	9,355	$2,017	$234.20	$211.02 - $268.30
Q4 2023	9,762	$2,526	$245.62	$220.86 - $269.43
Q3 2023	12,171	$3,128	$267.47	$251.85 - $287.60
Q2 2023	12,193	$3,473	$297.86	$273.39 - $319.76
Q1 2023	14,222	$3,954	$276.70	$254.80 - $295.90
Q4 2022	18,991	$5	$282.44	$250.31 - $311.88
Q3 2022	19,164	$5,117	$212.38	$193.65 - $283.44
Q2 2022	18,658	$3,805	$204.43	$187.16 - $225.50
Q1 2022	18,483	$3,893	$217.46	$192.67 - $249.00
Q4 2021	19,545	$4,689	$257.12	$221.72 - $290.76
Q3 2021	18,543	$5,247	$327.75	$282.64 - $372.12
Q2 2021	20,489	$7,095	$302.94	$257.03 - $468.55
Q1 2021	20,059	$5,612	$269.69	$238.40 - $296.38
Q4 2020	20,413	$4,998	$259.08	$223.25 - $363.92
Q3 2020	18,092	$5,132	$278.91	$261.87 - $312.00
Q2 2020	19,236	$5,147	$300.59	$257.60 - $350.24
Q1 2020	23,298	$7,371	$303.47	$262.25 - $374.99
Q4 2019	21,568	$6,400	$277.46	$219.70 - $318.00
Q3 2019	22,455	$5,228	$232.85	$215.78 - $246.99
Q2 2019	24,202	$5,660	$230.90	$219.20 - $245.35
Q1 2019	24,328	$5,751	$314.89	$216.12 - $344.00
Q4 2018	24,489	$7,369	$319.14	$278.46 - $358.41
Q3 2018	24,394	$8,619	$344.30	$288.13 - $388.67
Q2 2018	24,606	$7,142	$281.15	$249.17 - $310.91
Q1 2018	41,316	$11,313	$310.41	$259.76 - $370.57
Q4 2017	44,768	$14,262	$320.80	$301.81 - $348.84
Q3 2017	46,715	$14,627	$296.11	$269.50 - $330.00
Q2 2017	47,632	$12,925	$264.42	$244.28 - $291.90
Q1 2017	50,203	$13,727	$282.75	$260.50 - $301.42
Q4 2016	53,591	$15,197	$296.43	$268.00 - $329.83
Q3 2016	54,597	$17,090	$296.18	$240.07 - $333.65
Q2 2016	53,719	$12,990	$263.54	$223.02 - $292.69
Q1 2016	54,735	$14,249	$264.15	$242.07 - $301.02
Q4 2015	55,722	$17,070	$287.35	$254.00 - $311.65
Q3 2015	61,044	$17,813	$330.23	$265.00 - $412.24
Q2 2015	61,013	$24,646	$401.33	$368.88 - $432.88
Q1 2015	65,067	$27,474	$394.14	$334.40 - $480.18
Q4 2014	68,602	$23,287	$323.51	$290.85 - $361.93
Q3 2014	61,552	$20,362	$329.72	$298.31 - $349.00
Q2 2014	63,411	$19,994	$300.97	$272.02 - $322.25
Q1 2014	64,333	$19,678	$317.43	$270.62 - $358.89
Q4 2013	65,774	$18,400	$258.65	$221.07 - $298.82
Q3 2013	70,432	$16,957	$223.81	$203.55 - $248.95
Q2 2013	72,929	$15,694	$213.68	$191.80 - $242.64