BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM's Holding History (CIK: 0000938076)

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

Q4 2025

Shares 125,750 Value ($000) $22,131 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 131,389 Value ($000) $18,405 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 134,847 Value ($000) $16,935 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 133,547 Value ($000) $18,275 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 133,547 Value ($000) $20,422 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 142,832 Value ($000) $27,687 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 145,611 Value ($000) $33,756 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 178,436 Value ($000) $49,611 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 159,321 Value ($000) $41,227 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 160,065 Value ($000) $41,138 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 175,702 Value ($000) $50,049 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 178,436 Value ($000) $49,611 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 182,116 Value ($000) $50,432 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 181,566 Value ($000) $48,478 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 187,682 Value ($000) $38,276 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 193,516 Value ($000) $40,754 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 198,623 Value ($000) $47,654 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 202,466 Value ($000) $57,296 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 210,666 Value ($000) $72,947 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 210,070 Value ($000) $58,767 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 219,523 Value ($000) $53,752 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 233,784 Value ($000) $66,320 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 236,624 Value ($000) $63,309 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 240,447 Value ($000) $76,073 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 252,895 Value ($000) $75,042 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 257,075 Value ($000) $59,852 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 265,123 Value ($000) $62,004 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 273,980 Value ($000) $64,763 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 276,270 Value ($000) $83,135 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 276,977 Value ($000) $97,859 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 292,059 Value ($000) $84,767 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 291,383 Value ($000) $79,786 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 297,845 Value ($000) $94,884 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 314,022 Value ($000) $98,327 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 315,986 Value ($000) $85,746 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 315,905 Value ($000) $86,375 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 318,155 Value ($000) $90,222 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 318,813 Value ($000) $99,798 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 324,049 Value ($000) $78,362 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 275,221 Value ($000) $71,646 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 281,541 Value ($000) $86,250 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 298,680 Value ($000) $87,158 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 305,322 Value ($000) $123,332 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 313,791 Value ($000) $132,495 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 347,393 Value ($000) $117,923 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 349,433 Value ($000) $115,596 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 358,432 Value ($000) $113,017 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 360,162 Value ($000) $110,163 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 399,486 Value ($000) $111,756 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 404,714 Value ($000) $97,439 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 418,344 Value ($000) $90,028 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	125,750	$22,131	$163.37	$138.00 - $185.17
Q3 2025	131,389	$18,405	$135.17	$121.05 - $150.28
Q2 2025	134,847	$16,935	$124.60	$110.04 - $137.32
Q1 2025	133,547	$18,275	$142.96	$128.51 - $157.09
Q4 2024	133,547	$20,422	$168.67	$145.07 - $195.00
Q3 2024	142,832	$27,687	$209.21	$188.78 - $238.00
Q2 2024	145,611	$33,756	$217.32	$189.44 - $237.54
Q1 2024	178,436	$49,611	$234.20	$211.02 - $268.30
Q4 2023	159,321	$41,227	$245.62	$220.86 - $269.43
Q3 2023	160,065	$41,138	$267.47	$251.85 - $287.60
Q2 2023	175,702	$50,049	$297.86	$273.39 - $319.76
Q1 2023	178,436	$49,611	$276.70	$254.80 - $295.90
Q4 2022	182,116	$50,432	$282.44	$250.31 - $311.88
Q3 2022	181,566	$48,478	$212.38	$193.65 - $283.44
Q2 2022	187,682	$38,276	$204.43	$187.16 - $225.50
Q1 2022	193,516	$40,754	$217.46	$192.67 - $249.00
Q4 2021	198,623	$47,654	$257.12	$221.72 - $290.76
Q3 2021	202,466	$57,296	$327.75	$282.64 - $372.12
Q2 2021	210,666	$72,947	$302.94	$257.03 - $468.55
Q1 2021	210,070	$58,767	$269.69	$238.40 - $296.38
Q4 2020	219,523	$53,752	$259.08	$223.25 - $363.92
Q3 2020	233,784	$66,320	$278.91	$261.87 - $312.00
Q2 2020	236,624	$63,309	$300.59	$257.60 - $350.24
Q1 2020	240,447	$76,073	$303.47	$262.25 - $374.99
Q4 2019	252,895	$75,042	$277.46	$219.70 - $318.00
Q3 2019	257,075	$59,852	$232.85	$215.78 - $246.99
Q2 2019	265,123	$62,004	$230.90	$219.20 - $245.35
Q1 2019	273,980	$64,763	$314.89	$216.12 - $344.00
Q4 2018	276,270	$83,135	$319.14	$278.46 - $358.41
Q3 2018	276,977	$97,859	$344.30	$288.13 - $388.67
Q2 2018	292,059	$84,767	$281.15	$249.17 - $310.91
Q1 2018	291,383	$79,786	$310.41	$259.76 - $370.57
Q4 2017	297,845	$94,884	$320.80	$301.81 - $348.84
Q3 2017	314,022	$98,327	$296.11	$269.50 - $330.00
Q2 2017	315,986	$85,746	$264.42	$244.28 - $291.90
Q1 2017	315,905	$86,375	$282.75	$260.50 - $301.42
Q4 2016	318,155	$90,222	$296.43	$268.00 - $329.83
Q3 2016	318,813	$99,798	$296.18	$240.07 - $333.65
Q2 2016	324,049	$78,362	$263.54	$223.02 - $292.69
Q1 2016	275,221	$71,646	$264.15	$242.07 - $301.02
Q4 2015	281,541	$86,250	$287.35	$254.00 - $311.65
Q3 2015	298,680	$87,158	$330.23	$265.00 - $412.24
Q2 2015	305,322	$123,332	$401.33	$368.88 - $432.88
Q1 2015	313,791	$132,495	$394.14	$334.40 - $480.18
Q4 2014	347,393	$117,923	$323.51	$290.85 - $361.93
Q3 2014	349,433	$115,596	$329.72	$298.31 - $349.00
Q2 2014	358,432	$113,017	$300.97	$272.02 - $322.25
Q1 2014	360,162	$110,163	$317.43	$270.62 - $358.89
Q4 2013	399,486	$111,756	$258.65	$221.07 - $298.82
Q3 2013	404,714	$97,439	$223.81	$203.55 - $248.95
Q2 2013	418,344	$90,028	$213.68	$191.80 - $242.64