BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

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

Q4 2025

Shares 3,831 Value ($000) $674 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 3,475 Value ($000) $487 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 2,914 Value ($000) $366 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 8,225 Value ($000) $2,015 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 10,119 Value ($000) $1,547 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 5,956 Value ($000) $1,155 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 15,468 Value ($000) $3,586 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 11,406 Value ($000) $2,459 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 27,389 Value ($000) $7,087 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 10,087 Value ($000) $2,592 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 3,526 Value ($000) $1,004 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 3,244 Value ($000) $1 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 5,008 Value ($000) $1 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 35,793 Value ($000) $9,556 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 31,792 Value ($000) $6,484 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 47,084 Value ($000) $9,916 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 12,745 Value ($000) $3,057 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 11,000 Value ($000) $3,113 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 6,737 Value ($000) $2,333 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 19,911 Value ($000) $5,570 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 6,843 Value ($000) $1,676 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 7,455 Value ($000) $2,115 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 4,624 Value ($000) $1,237 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 72 Value ($000) $23 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 179 Value ($000) $53 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 2,301 Value ($000) $536 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 7,157 Value ($000) $1,674 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 4,354 Value ($000) $1,029 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 581 Value ($000) $175 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 7,313 Value ($000) $2,584 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 14,616 Value ($000) $4,242 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 1,157 Value ($000) $317 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 1,253 Value ($000) $399 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 1,641 Value ($000) $513 Avg Close $296.11 Range $269.50 - $330.00

Q4 2016

Shares 382 Value ($000) $108 Avg Close $296.43 Range $268.00 - $329.83

Q2 2016

Shares 1,267 Value ($000) $307 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 390 Value ($000) $102 Avg Close $264.15 Range $242.07 - $301.02

Q3 2015

Shares 93 Value ($000) $27 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 75 Value ($000) $30 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 489 Value ($000) $206 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 35 Value ($000) $12 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 4,601 Value ($000) $1,522 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 397 Value ($000) $125 Avg Close $300.97 Range $272.02 - $322.25

Q4 2013

Shares 4,128 Value ($000) $1,154 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 6,575 Value ($000) $1,583 Avg Close $223.81 Range $203.55 - $248.95

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,831	$674	$163.37	$138.00 - $185.17
Q3 2025	3,475	$487	$135.17	$121.05 - $150.28
Q2 2025	2,914	$366	$124.60	$110.04 - $137.32
Q1 2025	8,225	$2,015	$142.96	$128.51 - $157.09
Q4 2024	10,119	$1,547	$168.67	$145.07 - $195.00
Q3 2024	5,956	$1,155	$209.21	$188.78 - $238.00
Q2 2024	15,468	$3,586	$217.32	$189.44 - $237.54
Q1 2024	11,406	$2,459	$234.20	$211.02 - $268.30
Q4 2023	27,389	$7,087	$245.62	$220.86 - $269.43
Q3 2023	10,087	$2,592	$267.47	$251.85 - $287.60
Q2 2023	3,526	$1,004	$297.86	$273.39 - $319.76
Q1 2023	3,244	$1	$276.70	$254.80 - $295.90
Q4 2022	5,008	$1	$282.44	$250.31 - $311.88
Q3 2022	35,793	$9,556	$212.38	$193.65 - $283.44
Q2 2022	31,792	$6,484	$204.43	$187.16 - $225.50
Q1 2022	47,084	$9,916	$217.46	$192.67 - $249.00
Q4 2021	12,745	$3,057	$257.12	$221.72 - $290.76
Q3 2021	11,000	$3,113	$327.75	$282.64 - $372.12
Q2 2021	6,737	$2,333	$302.94	$257.03 - $468.55
Q1 2021	19,911	$5,570	$269.69	$238.40 - $296.38
Q4 2020	6,843	$1,676	$259.08	$223.25 - $363.92
Q3 2020	7,455	$2,115	$278.91	$261.87 - $312.00
Q2 2020	4,624	$1,237	$300.59	$257.60 - $350.24
Q1 2020	72	$23	$303.47	$262.25 - $374.99
Q4 2019	179	$53	$277.46	$219.70 - $318.00
Q3 2019	2,301	$536	$232.85	$215.78 - $246.99
Q2 2019	7,157	$1,674	$230.90	$219.20 - $245.35
Q1 2019	4,354	$1,029	$314.89	$216.12 - $344.00
Q4 2018	581	$175	$319.14	$278.46 - $358.41
Q3 2018	7,313	$2,584	$344.30	$288.13 - $388.67
Q2 2018	14,616	$4,242	$281.15	$249.17 - $310.91
Q1 2018	1,157	$317	$310.41	$259.76 - $370.57
Q4 2017	1,253	$399	$320.80	$301.81 - $348.84
Q3 2017	1,641	$513	$296.11	$269.50 - $330.00
Q4 2016	382	$108	$296.43	$268.00 - $329.83
Q2 2016	1,267	$307	$263.54	$223.02 - $292.69
Q1 2016	390	$102	$264.15	$242.07 - $301.02
Q3 2015	93	$27	$330.23	$265.00 - $412.24
Q2 2015	75	$30	$401.33	$368.88 - $432.88
Q1 2015	489	$206	$394.14	$334.40 - $480.18
Q4 2014	35	$12	$323.51	$290.85 - $361.93
Q3 2014	4,601	$1,522	$329.72	$298.31 - $349.00
Q2 2014	397	$125	$300.97	$272.02 - $322.25
Q4 2013	4,128	$1,154	$258.65	$221.07 - $298.82
Q3 2013	6,575	$1,583	$223.81	$203.55 - $248.95