BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

SG Americas Securities, LLC's Holding History (CIK: 0001313360)

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

Q4 2025

Shares 183,829 Value ($000) $32 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 9,707 Value ($000) $1 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 22,470 Value ($000) $3 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 719,793 Value ($000) $98 Avg Close $142.96 Range $128.51 - $157.09

Q3 2024

Shares 3,675 Value ($000) $1 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 40,190 Value ($000) $9 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 176,262 Value ($000) $38 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 14,179 Value ($000) $4 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 16,566 Value ($000) $4 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 18,055 Value ($000) $5 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 13,485 Value ($000) $4 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 27,185 Value ($000) $8 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 6,972 Value ($000) $1,862 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 9,273 Value ($000) $1,891 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 65,394 Value ($000) $13,772 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 32,755 Value ($000) $7,859 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 21,299 Value ($000) $6,027 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 12,844 Value ($000) $4,447 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 30,001 Value ($000) $8,393 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 60,169 Value ($000) $14,733 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 31,837 Value ($000) $9,032 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 55,203 Value ($000) $14,770 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 8,895 Value ($000) $2,814 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 22,112 Value ($000) $6,561 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 55,752 Value ($000) $12,980 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 73,581 Value ($000) $17,208 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 44,081 Value ($000) $10,420 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 9,412 Value ($000) $2,832 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 53,826 Value ($000) $19,017 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 32,942 Value ($000) $9,561 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 26,945 Value ($000) $7,378 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 31,688 Value ($000) $10,095 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 30,407 Value ($000) $9,521 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 5,251 Value ($000) $1,425 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 44,223 Value ($000) $12,091 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 123,807 Value ($000) $35,109 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 3,138 Value ($000) $982 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 32,226 Value ($000) $7,793 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 83,891 Value ($000) $21,839 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 100,388 Value ($000) $30,754 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 45,748 Value ($000) $13,350 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 95,476 Value ($000) $38,567 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 114,739 Value ($000) $48,447 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 176,545 Value ($000) $59,928 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 251,305 Value ($000) $83,134 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 223,988 Value ($000) $70,626 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 268,460 Value ($000) $82,114 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 261,694 Value ($000) $73,209 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 289,670 Value ($000) $69,741 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 275,718 Value ($000) $59,335 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	183,829	$32	$163.37	$138.00 - $185.17
Q3 2025	9,707	$1	$135.17	$121.05 - $150.28
Q2 2025	22,470	$3	$124.60	$110.04 - $137.32
Q1 2025	719,793	$98	$142.96	$128.51 - $157.09
Q3 2024	3,675	$1	$209.21	$188.78 - $238.00
Q2 2024	40,190	$9	$217.32	$189.44 - $237.54
Q1 2024	176,262	$38	$234.20	$211.02 - $268.30
Q4 2023	14,179	$4	$245.62	$220.86 - $269.43
Q3 2023	16,566	$4	$267.47	$251.85 - $287.60
Q2 2023	18,055	$5	$297.86	$273.39 - $319.76
Q1 2023	13,485	$4	$276.70	$254.80 - $295.90
Q4 2022	27,185	$8	$282.44	$250.31 - $311.88
Q3 2022	6,972	$1,862	$212.38	$193.65 - $283.44
Q2 2022	9,273	$1,891	$204.43	$187.16 - $225.50
Q1 2022	65,394	$13,772	$217.46	$192.67 - $249.00
Q4 2021	32,755	$7,859	$257.12	$221.72 - $290.76
Q3 2021	21,299	$6,027	$327.75	$282.64 - $372.12
Q2 2021	12,844	$4,447	$302.94	$257.03 - $468.55
Q1 2021	30,001	$8,393	$269.69	$238.40 - $296.38
Q4 2020	60,169	$14,733	$259.08	$223.25 - $363.92
Q3 2020	31,837	$9,032	$278.91	$261.87 - $312.00
Q2 2020	55,203	$14,770	$300.59	$257.60 - $350.24
Q1 2020	8,895	$2,814	$303.47	$262.25 - $374.99
Q4 2019	22,112	$6,561	$277.46	$219.70 - $318.00
Q3 2019	55,752	$12,980	$232.85	$215.78 - $246.99
Q2 2019	73,581	$17,208	$230.90	$219.20 - $245.35
Q1 2019	44,081	$10,420	$314.89	$216.12 - $344.00
Q4 2018	9,412	$2,832	$319.14	$278.46 - $358.41
Q3 2018	53,826	$19,017	$344.30	$288.13 - $388.67
Q2 2018	32,942	$9,561	$281.15	$249.17 - $310.91
Q1 2018	26,945	$7,378	$310.41	$259.76 - $370.57
Q4 2017	31,688	$10,095	$320.80	$301.81 - $348.84
Q3 2017	30,407	$9,521	$296.11	$269.50 - $330.00
Q2 2017	5,251	$1,425	$264.42	$244.28 - $291.90
Q1 2017	44,223	$12,091	$282.75	$260.50 - $301.42
Q4 2016	123,807	$35,109	$296.43	$268.00 - $329.83
Q3 2016	3,138	$982	$296.18	$240.07 - $333.65
Q2 2016	32,226	$7,793	$263.54	$223.02 - $292.69
Q1 2016	83,891	$21,839	$264.15	$242.07 - $301.02
Q4 2015	100,388	$30,754	$287.35	$254.00 - $311.65
Q3 2015	45,748	$13,350	$330.23	$265.00 - $412.24
Q2 2015	95,476	$38,567	$401.33	$368.88 - $432.88
Q1 2015	114,739	$48,447	$394.14	$334.40 - $480.18
Q4 2014	176,545	$59,928	$323.51	$290.85 - $361.93
Q3 2014	251,305	$83,134	$329.72	$298.31 - $349.00
Q2 2014	223,988	$70,626	$300.97	$272.02 - $322.25
Q1 2014	268,460	$82,114	$317.43	$270.62 - $358.89
Q4 2013	261,694	$73,209	$258.65	$221.07 - $298.82
Q3 2013	289,670	$69,741	$223.81	$203.55 - $248.95
Q2 2013	275,718	$59,335	$213.68	$191.80 - $242.64