BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

OPPENHEIMER & CO INC's Holding History (CIK: 0000822581)

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

Q3 2025

Shares 13,610 Value ($000) $1,906 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 2,264 Value ($000) $284 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 4,290 Value ($000) $587 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 4,224 Value ($000) $646 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 6,050 Value ($000) $1,173 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 7,576 Value ($000) $1,756 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 7,528 Value ($000) $1,623 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 11,156 Value ($000) $2,887 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 8,377 Value ($000) $2,153 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 9,430 Value ($000) $2,686 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 10,253 Value ($000) $2,851 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 7,156 Value ($000) $1,982 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 7,572 Value ($000) $2,022 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 7,982 Value ($000) $1,628 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 8,213 Value ($000) $1,729 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 7,701 Value ($000) $1,848 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 7,322 Value ($000) $2,072 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 6,887 Value ($000) $2,385 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 11,411 Value ($000) $3,192 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 8,471 Value ($000) $2,074 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 9,798 Value ($000) $2,779 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 13,753 Value ($000) $3,679 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 13,393 Value ($000) $4,238 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 12,558 Value ($000) $3,726 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 12,740 Value ($000) $2,966 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 12,707 Value ($000) $2,972 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 11,261 Value ($000) $2,661 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 10,887 Value ($000) $3,276 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 10,900 Value ($000) $3,851 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 9,355 Value ($000) $2,715 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 55,338 Value ($000) $15,152 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 57,604 Value ($000) $18,351 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 56,497 Value ($000) $17,690 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 55,118 Value ($000) $14,957 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 55,955 Value ($000) $15,299 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 57,136 Value ($000) $16,202 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 56,439 Value ($000) $17,666 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 57,789 Value ($000) $13,975 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 58,838 Value ($000) $15,317 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 58,276 Value ($000) $17,853 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 57,503 Value ($000) $16,780 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 53,608 Value ($000) $21,655 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 11,581 Value ($000) $4,889 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 10,546 Value ($000) $3,579 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 11,393 Value ($000) $3,769 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 10,290 Value ($000) $3,244 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 10,188 Value ($000) $3,116 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 10,635 Value ($000) $2,973 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 7,994 Value ($000) $1,924 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 6,738 Value ($000) $1,450 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	13,610	$1,906	$135.17	$121.05 - $150.28
Q2 2025	2,264	$284	$124.60	$110.04 - $137.32
Q1 2025	4,290	$587	$142.96	$128.51 - $157.09
Q4 2024	4,224	$646	$168.67	$145.07 - $195.00
Q3 2024	6,050	$1,173	$209.21	$188.78 - $238.00
Q2 2024	7,576	$1,756	$217.32	$189.44 - $237.54
Q1 2024	7,528	$1,623	$234.20	$211.02 - $268.30
Q4 2023	11,156	$2,887	$245.62	$220.86 - $269.43
Q3 2023	8,377	$2,153	$267.47	$251.85 - $287.60
Q2 2023	9,430	$2,686	$297.86	$273.39 - $319.76
Q1 2023	10,253	$2,851	$276.70	$254.80 - $295.90
Q4 2022	7,156	$1,982	$282.44	$250.31 - $311.88
Q3 2022	7,572	$2,022	$212.38	$193.65 - $283.44
Q2 2022	7,982	$1,628	$204.43	$187.16 - $225.50
Q1 2022	8,213	$1,729	$217.46	$192.67 - $249.00
Q4 2021	7,701	$1,848	$257.12	$221.72 - $290.76
Q3 2021	7,322	$2,072	$327.75	$282.64 - $372.12
Q2 2021	6,887	$2,385	$302.94	$257.03 - $468.55
Q1 2021	11,411	$3,192	$269.69	$238.40 - $296.38
Q4 2020	8,471	$2,074	$259.08	$223.25 - $363.92
Q3 2020	9,798	$2,779	$278.91	$261.87 - $312.00
Q2 2020	13,753	$3,679	$300.59	$257.60 - $350.24
Q1 2020	13,393	$4,238	$303.47	$262.25 - $374.99
Q4 2019	12,558	$3,726	$277.46	$219.70 - $318.00
Q3 2019	12,740	$2,966	$232.85	$215.78 - $246.99
Q2 2019	12,707	$2,972	$230.90	$219.20 - $245.35
Q1 2019	11,261	$2,661	$314.89	$216.12 - $344.00
Q4 2018	10,887	$3,276	$319.14	$278.46 - $358.41
Q3 2018	10,900	$3,851	$344.30	$288.13 - $388.67
Q2 2018	9,355	$2,715	$281.15	$249.17 - $310.91
Q1 2018	55,338	$15,152	$310.41	$259.76 - $370.57
Q4 2017	57,604	$18,351	$320.80	$301.81 - $348.84
Q3 2017	56,497	$17,690	$296.11	$269.50 - $330.00
Q2 2017	55,118	$14,957	$264.42	$244.28 - $291.90
Q1 2017	55,955	$15,299	$282.75	$260.50 - $301.42
Q4 2016	57,136	$16,202	$296.43	$268.00 - $329.83
Q3 2016	56,439	$17,666	$296.18	$240.07 - $333.65
Q2 2016	57,789	$13,975	$263.54	$223.02 - $292.69
Q1 2016	58,838	$15,317	$264.15	$242.07 - $301.02
Q4 2015	58,276	$17,853	$287.35	$254.00 - $311.65
Q3 2015	57,503	$16,780	$330.23	$265.00 - $412.24
Q2 2015	53,608	$21,655	$401.33	$368.88 - $432.88
Q1 2015	11,581	$4,889	$394.14	$334.40 - $480.18
Q4 2014	10,546	$3,579	$323.51	$290.85 - $361.93
Q3 2014	11,393	$3,769	$329.72	$298.31 - $349.00
Q2 2014	10,290	$3,244	$300.97	$272.02 - $322.25
Q1 2014	10,188	$3,116	$317.43	$270.62 - $358.89
Q4 2013	10,635	$2,973	$258.65	$221.07 - $298.82
Q3 2013	7,994	$1,924	$223.81	$203.55 - $248.95
Q2 2013	6,738	$1,450	$213.68	$191.80 - $242.64