BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

MASSMUTUAL TRUST CO FSB/ADV's Holding History (CIK: 0001103653)

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

Q4 2025

Shares 760 Value ($000) $134 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 726 Value ($000) $102 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 617 Value ($000) $77 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 510 Value ($000) $70 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 272 Value ($000) $42 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 376 Value ($000) $73 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 494 Value ($000) $115 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 333 Value ($000) $72 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 241 Value ($000) $62 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 231 Value ($000) $59 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 254 Value ($000) $72 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 200 Value ($000) $56 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 116 Value ($000) $0 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 108 Value ($000) $29 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 84 Value ($000) $17 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 73 Value ($000) $15 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 18 Value ($000) $4 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 50 Value ($000) $14 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 11,048 Value ($000) $3,826 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 11,275 Value ($000) $3,154 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 11,019 Value ($000) $2,698 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 11,921 Value ($000) $3,382 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 12,078 Value ($000) $3,231 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 11,575 Value ($000) $3,662 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 11,684 Value ($000) $3,467 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 11,762 Value ($000) $2,738 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 12,588 Value ($000) $2,944 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 14,075 Value ($000) $3,327,049 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 13,784 Value ($000) $4,147,881 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 13,640 Value ($000) $4,819,148 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 14,831 Value ($000) $4,304,549 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 13,431 Value ($000) $3,677,676 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 12,705 Value ($000) $4,047,432 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 11,131 Value ($000) $3,485,339 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 10,939 Value ($000) $2,968,407 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 14,269 Value ($000) $3,901,430 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 13,482 Value ($000) $3,823,226 Avg Close $296.43 Range $268.00 - $329.83

Q2 2016

Shares 3,285 Value ($000) $794,379 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 2,585 Value ($000) $672,927 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 2,428 Value ($000) $743,818 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 4,763 Value ($000) $1,575,649 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 3,928 Value ($000) $1,238,538 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 5,315 Value ($000) $2,244,206 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 3,533 Value ($000) $1,199,277 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 4,763 Value ($000) $1,575,648 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 3,928 Value ($000) $1,238,538 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 3,192 Value ($000) $976,337 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 1,235 Value ($000) $345,271 Avg Close $258.65 Range $221.07 - $298.82

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	760	$134	$163.37	$138.00 - $185.17
Q3 2025	726	$102	$135.17	$121.05 - $150.28
Q2 2025	617	$77	$124.60	$110.04 - $137.32
Q1 2025	510	$70	$142.96	$128.51 - $157.09
Q4 2024	272	$42	$168.67	$145.07 - $195.00
Q3 2024	376	$73	$209.21	$188.78 - $238.00
Q2 2024	494	$115	$217.32	$189.44 - $237.54
Q1 2024	333	$72	$234.20	$211.02 - $268.30
Q4 2023	241	$62	$245.62	$220.86 - $269.43
Q3 2023	231	$59	$267.47	$251.85 - $287.60
Q2 2023	254	$72	$297.86	$273.39 - $319.76
Q1 2023	200	$56	$276.70	$254.80 - $295.90
Q4 2022	116	$0	$282.44	$250.31 - $311.88
Q3 2022	108	$29	$212.38	$193.65 - $283.44
Q2 2022	84	$17	$204.43	$187.16 - $225.50
Q1 2022	73	$15	$217.46	$192.67 - $249.00
Q4 2021	18	$4	$257.12	$221.72 - $290.76
Q3 2021	50	$14	$327.75	$282.64 - $372.12
Q2 2021	11,048	$3,826	$302.94	$257.03 - $468.55
Q1 2021	11,275	$3,154	$269.69	$238.40 - $296.38
Q4 2020	11,019	$2,698	$259.08	$223.25 - $363.92
Q3 2020	11,921	$3,382	$278.91	$261.87 - $312.00
Q2 2020	12,078	$3,231	$300.59	$257.60 - $350.24
Q1 2020	11,575	$3,662	$303.47	$262.25 - $374.99
Q4 2019	11,684	$3,467	$277.46	$219.70 - $318.00
Q3 2019	11,762	$2,738	$232.85	$215.78 - $246.99
Q2 2019	12,588	$2,944	$230.90	$219.20 - $245.35
Q1 2019	14,075	$3,327,049	$314.89	$216.12 - $344.00
Q4 2018	13,784	$4,147,881	$319.14	$278.46 - $358.41
Q3 2018	13,640	$4,819,148	$344.30	$288.13 - $388.67
Q2 2018	14,831	$4,304,549	$281.15	$249.17 - $310.91
Q1 2018	13,431	$3,677,676	$310.41	$259.76 - $370.57
Q4 2017	12,705	$4,047,432	$320.80	$301.81 - $348.84
Q3 2017	11,131	$3,485,339	$296.11	$269.50 - $330.00
Q2 2017	10,939	$2,968,407	$264.42	$244.28 - $291.90
Q1 2017	14,269	$3,901,430	$282.75	$260.50 - $301.42
Q4 2016	13,482	$3,823,226	$296.43	$268.00 - $329.83
Q2 2016	3,285	$794,379	$263.54	$223.02 - $292.69
Q1 2016	2,585	$672,927	$264.15	$242.07 - $301.02
Q4 2015	2,428	$743,818	$287.35	$254.00 - $311.65
Q3 2015	4,763	$1,575,649	$330.23	$265.00 - $412.24
Q2 2015	3,928	$1,238,538	$401.33	$368.88 - $432.88
Q1 2015	5,315	$2,244,206	$394.14	$334.40 - $480.18
Q4 2014	3,533	$1,199,277	$323.51	$290.85 - $361.93
Q3 2014	4,763	$1,575,648	$329.72	$298.31 - $349.00
Q2 2014	3,928	$1,238,538	$300.97	$272.02 - $322.25
Q1 2014	3,192	$976,337	$317.43	$270.62 - $358.89
Q4 2013	1,235	$345,271	$258.65	$221.07 - $298.82