BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

STRS OHIO's Holding History (CIK: 0000820478)

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

Q4 2025

Shares 3,499 Value ($000) $616 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 3,493 Value ($000) $489 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 3,492 Value ($000) $439 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 34,000 Value ($000) $4,653 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 34,000 Value ($000) $5,199 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 49,000 Value ($000) $9,498 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 49,000 Value ($000) $11,359 Avg Close $217.32 Range $189.44 - $237.54

Q4 2023

Shares 5,825 Value ($000) $2 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 86,939 Value ($000) $22 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 133,916 Value ($000) $38 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 136,753 Value ($000) $38 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 136,550 Value ($000) $38 Avg Close $282.44 Range $250.31 - $311.88

Q1 2022

Shares 45,733 Value ($000) $9,631 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 51,145 Value ($000) $12,270 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 54,837 Value ($000) $15,518 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 64,752 Value ($000) $22,421 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 67,815 Value ($000) $18,971 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 71,825 Value ($000) $17,587 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 83,663 Value ($000) $23,733 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 90,704 Value ($000) $24,267 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 88,012 Value ($000) $27,845 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 76,026 Value ($000) $22,559 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 84,593 Value ($000) $19,694 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 95,539 Value ($000) $22,343 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 102,522 Value ($000) $24,234 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 119,075 Value ($000) $35,832 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 118,231 Value ($000) $41,772 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 131,875 Value ($000) $38,275 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 209,977 Value ($000) $57,495 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 277,132 Value ($000) $88,285 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 295,568 Value ($000) $92,548 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 285,568 Value ($000) $77,491 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 319,930 Value ($000) $87,475 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 327,277 Value ($000) $92,809 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 313,887 Value ($000) $98,256 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 303,272 Value ($000) $73,337 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 274,158 Value ($000) $71,368 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 278,869 Value ($000) $85,431 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 282,350 Value ($000) $82,392 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 277,894 Value ($000) $112,252 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 245,334 Value ($000) $103,589 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 249,295 Value ($000) $84,623 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 252,655 Value ($000) $83,581 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 252,655 Value ($000) $79,665 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 221,475 Value ($000) $67,743 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 184,975 Value ($000) $51,747 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 177,675 Value ($000) $42,777 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 176,640 Value ($000) $38,013 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	3,499	$616	$163.37	$138.00 - $185.17
Q3 2025	3,493	$489	$135.17	$121.05 - $150.28
Q2 2025	3,492	$439	$124.60	$110.04 - $137.32
Q1 2025	34,000	$4,653	$142.96	$128.51 - $157.09
Q4 2024	34,000	$5,199	$168.67	$145.07 - $195.00
Q3 2024	49,000	$9,498	$209.21	$188.78 - $238.00
Q2 2024	49,000	$11,359	$217.32	$189.44 - $237.54
Q4 2023	5,825	$2	$245.62	$220.86 - $269.43
Q3 2023	86,939	$22	$267.47	$251.85 - $287.60
Q2 2023	133,916	$38	$297.86	$273.39 - $319.76
Q1 2023	136,753	$38	$276.70	$254.80 - $295.90
Q4 2022	136,550	$38	$282.44	$250.31 - $311.88
Q1 2022	45,733	$9,631	$217.46	$192.67 - $249.00
Q4 2021	51,145	$12,270	$257.12	$221.72 - $290.76
Q3 2021	54,837	$15,518	$327.75	$282.64 - $372.12
Q2 2021	64,752	$22,421	$302.94	$257.03 - $468.55
Q1 2021	67,815	$18,971	$269.69	$238.40 - $296.38
Q4 2020	71,825	$17,587	$259.08	$223.25 - $363.92
Q3 2020	83,663	$23,733	$278.91	$261.87 - $312.00
Q2 2020	90,704	$24,267	$300.59	$257.60 - $350.24
Q1 2020	88,012	$27,845	$303.47	$262.25 - $374.99
Q4 2019	76,026	$22,559	$277.46	$219.70 - $318.00
Q3 2019	84,593	$19,694	$232.85	$215.78 - $246.99
Q2 2019	95,539	$22,343	$230.90	$219.20 - $245.35
Q1 2019	102,522	$24,234	$314.89	$216.12 - $344.00
Q4 2018	119,075	$35,832	$319.14	$278.46 - $358.41
Q3 2018	118,231	$41,772	$344.30	$288.13 - $388.67
Q2 2018	131,875	$38,275	$281.15	$249.17 - $310.91
Q1 2018	209,977	$57,495	$310.41	$259.76 - $370.57
Q4 2017	277,132	$88,285	$320.80	$301.81 - $348.84
Q3 2017	295,568	$92,548	$296.11	$269.50 - $330.00
Q2 2017	285,568	$77,491	$264.42	$244.28 - $291.90
Q1 2017	319,930	$87,475	$282.75	$260.50 - $301.42
Q4 2016	327,277	$92,809	$296.43	$268.00 - $329.83
Q3 2016	313,887	$98,256	$296.18	$240.07 - $333.65
Q2 2016	303,272	$73,337	$263.54	$223.02 - $292.69
Q1 2016	274,158	$71,368	$264.15	$242.07 - $301.02
Q4 2015	278,869	$85,431	$287.35	$254.00 - $311.65
Q3 2015	282,350	$82,392	$330.23	$265.00 - $412.24
Q2 2015	277,894	$112,252	$401.33	$368.88 - $432.88
Q1 2015	245,334	$103,589	$394.14	$334.40 - $480.18
Q4 2014	249,295	$84,623	$323.51	$290.85 - $361.93
Q3 2014	252,655	$83,581	$329.72	$298.31 - $349.00
Q2 2014	252,655	$79,665	$300.97	$272.02 - $322.25
Q1 2014	221,475	$67,743	$317.43	$270.62 - $358.89
Q4 2013	184,975	$51,747	$258.65	$221.07 - $298.82
Q3 2013	177,675	$42,777	$223.81	$203.55 - $248.95
Q2 2013	176,640	$38,013	$213.68	$191.80 - $242.64