BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

NISA INVESTMENT ADVISORS, LLC's Holding History (CIK: 0000937615)

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

Q4 2025

Shares 38,435 Value ($000) $6,764 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 47,556 Value ($000) $6,662 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 50,902 Value ($000) $6,393 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 153,217 Value ($000) $20,966 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 199,254 Value ($000) $30,470 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 49,793 Value ($000) $9,652 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 56,528 Value ($000) $13,104 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 54,708 Value ($000) $11,797 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 55,721 Value ($000) $14,419 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 58,536 Value ($000) $15,044 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 67,389 Value ($000) $19,196 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 71,731 Value ($000) $20 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 67,953 Value ($000) $19 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 69,665 Value ($000) $18,607 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 71,092 Value ($000) $14,499 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 68,396 Value ($000) $14,404 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 85,206 Value ($000) $19,257 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 78,241 Value ($000) $22,141 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 87,034 Value ($000) $30,137 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 71,654 Value ($000) $20,045 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 89,224 Value ($000) $21,847 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 97,347 Value ($000) $27,615 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 85,290 Value ($000) $22,819 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 85,992 Value ($000) $27,206 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 84,700 Value ($000) $25,133 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 90,721 Value ($000) $21,122 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 82,758 Value ($000) $19,355 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 89,904 Value ($000) $21,252 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 93,380 Value ($000) $28,100 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 93,830 Value ($000) $33,146 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 82,387 Value ($000) $23,911 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 87,093 Value ($000) $24,084 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 88,943 Value ($000) $28,335 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 88,293 Value ($000) $27,646 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 73,353 Value ($000) $19,613 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 82,853 Value ($000) $22,654 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 84,651 Value ($000) $24,005 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 85,978 Value ($000) $26,914 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 75,848 Value ($000) $18,342 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 77,068 Value ($000) $20,062 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 79,268 Value ($000) $24,284 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 81,768 Value ($000) $23,905 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 87,618 Value ($000) $35,392 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 91,318 Value ($000) $38,558 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 90,118 Value ($000) $30,591 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 97,338 Value ($000) $32,200 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 95,338 Value ($000) $30,061 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 95,638 Value ($000) $29,253 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 78,088 Value ($000) $21,831 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 78,388 Value ($000) $18,873 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 78,617 Value ($000) $16,918 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	38,435	$6,764	$163.37	$138.00 - $185.17
Q3 2025	47,556	$6,662	$135.17	$121.05 - $150.28
Q2 2025	50,902	$6,393	$124.60	$110.04 - $137.32
Q1 2025	153,217	$20,966	$142.96	$128.51 - $157.09
Q4 2024	199,254	$30,470	$168.67	$145.07 - $195.00
Q3 2024	49,793	$9,652	$209.21	$188.78 - $238.00
Q2 2024	56,528	$13,104	$217.32	$189.44 - $237.54
Q1 2024	54,708	$11,797	$234.20	$211.02 - $268.30
Q4 2023	55,721	$14,419	$245.62	$220.86 - $269.43
Q3 2023	58,536	$15,044	$267.47	$251.85 - $287.60
Q2 2023	67,389	$19,196	$297.86	$273.39 - $319.76
Q1 2023	71,731	$20	$276.70	$254.80 - $295.90
Q4 2022	67,953	$19	$282.44	$250.31 - $311.88
Q3 2022	69,665	$18,607	$212.38	$193.65 - $283.44
Q2 2022	71,092	$14,499	$204.43	$187.16 - $225.50
Q1 2022	68,396	$14,404	$217.46	$192.67 - $249.00
Q4 2021	85,206	$19,257	$257.12	$221.72 - $290.76
Q3 2021	78,241	$22,141	$327.75	$282.64 - $372.12
Q2 2021	87,034	$30,137	$302.94	$257.03 - $468.55
Q1 2021	71,654	$20,045	$269.69	$238.40 - $296.38
Q4 2020	89,224	$21,847	$259.08	$223.25 - $363.92
Q3 2020	97,347	$27,615	$278.91	$261.87 - $312.00
Q2 2020	85,290	$22,819	$300.59	$257.60 - $350.24
Q1 2020	85,992	$27,206	$303.47	$262.25 - $374.99
Q4 2019	84,700	$25,133	$277.46	$219.70 - $318.00
Q3 2019	90,721	$21,122	$232.85	$215.78 - $246.99
Q2 2019	82,758	$19,355	$230.90	$219.20 - $245.35
Q1 2019	89,904	$21,252	$314.89	$216.12 - $344.00
Q4 2018	93,380	$28,100	$319.14	$278.46 - $358.41
Q3 2018	93,830	$33,146	$344.30	$288.13 - $388.67
Q2 2018	82,387	$23,911	$281.15	$249.17 - $310.91
Q1 2018	87,093	$24,084	$310.41	$259.76 - $370.57
Q4 2017	88,943	$28,335	$320.80	$301.81 - $348.84
Q3 2017	88,293	$27,646	$296.11	$269.50 - $330.00
Q2 2017	73,353	$19,613	$264.42	$244.28 - $291.90
Q1 2017	82,853	$22,654	$282.75	$260.50 - $301.42
Q4 2016	84,651	$24,005	$296.43	$268.00 - $329.83
Q3 2016	85,978	$26,914	$296.18	$240.07 - $333.65
Q2 2016	75,848	$18,342	$263.54	$223.02 - $292.69
Q1 2016	77,068	$20,062	$264.15	$242.07 - $301.02
Q4 2015	79,268	$24,284	$287.35	$254.00 - $311.65
Q3 2015	81,768	$23,905	$330.23	$265.00 - $412.24
Q2 2015	87,618	$35,392	$401.33	$368.88 - $432.88
Q1 2015	91,318	$38,558	$394.14	$334.40 - $480.18
Q4 2014	90,118	$30,591	$323.51	$290.85 - $361.93
Q3 2014	97,338	$32,200	$329.72	$298.31 - $349.00
Q2 2014	95,338	$30,061	$300.97	$272.02 - $322.25
Q1 2014	95,638	$29,253	$317.43	$270.62 - $358.89
Q4 2013	78,088	$21,831	$258.65	$221.07 - $298.82
Q3 2013	78,388	$18,873	$223.81	$203.55 - $248.95
Q2 2013	78,617	$16,918	$213.68	$191.80 - $242.64