BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

GUGGENHEIM CAPITAL LLC's Holding History (CIK: 0001283072)

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

Q4 2025

Shares 24,020 Value ($000) $4,227 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 62,663 Value ($000) $8,778 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 59,827 Value ($000) $7,514 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 53,126 Value ($000) $7,270 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 60,777 Value ($000) $9,294 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 60,244 Value ($000) $11,678 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 62,343 Value ($000) $14,452 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 69,050 Value ($000) $14,889 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 68,055 Value ($000) $17,611 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 68,512 Value ($000) $17,608 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 60,919 Value ($000) $17,353 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 57,456 Value ($000) $15,974 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 59,537 Value ($000) $16,487 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 63,307 Value ($000) $16,903 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 72,276 Value ($000) $14,740 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 81,185 Value ($000) $17,098 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 88,780 Value ($000) $21,300 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 78,671 Value ($000) $22,263 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 81,838 Value ($000) $28,339 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 79,799 Value ($000) $22,324 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 94,669 Value ($000) $23,180 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 101,371 Value ($000) $28,757 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 117,091 Value ($000) $31,327 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 104,220 Value ($000) $32,973 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 144,195 Value ($000) $42,788 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 156,335 Value ($000) $36,398 Avg Close $232.85 Range $215.78 - $246.99

Q4 2018

Shares 156,206 Value ($000) $47,005 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 155,762 Value ($000) $55,032 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 171,127 Value ($000) $49,669 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 320,632 Value ($000) $87,796 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 281,505 Value ($000) $89,679 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 339,085 Value ($000) $106,172 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 375,808 Value ($000) $101,980 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 331,932 Value ($000) $90,755 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 329,979 Value ($000) $93,576 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 305,959 Value ($000) $95,774 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 309,944 Value ($000) $74,950 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 339,479 Value ($000) $88,373 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 395,741 Value ($000) $121,235 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 367,576 Value ($000) $107,263 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 389,787 Value ($000) $157,450 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 356,796 Value ($000) $150,654 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 302,709 Value ($000) $102,755 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 296,395 Value ($000) $98,050 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 279,925 Value ($000) $88,263 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 282,309 Value ($000) $86,350 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 276,244 Value ($000) $77,280 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 258,709 Value ($000) $62,286 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 230,642 Value ($000) $49,634 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	24,020	$4,227	$163.37	$138.00 - $185.17
Q3 2025	62,663	$8,778	$135.17	$121.05 - $150.28
Q2 2025	59,827	$7,514	$124.60	$110.04 - $137.32
Q1 2025	53,126	$7,270	$142.96	$128.51 - $157.09
Q4 2024	60,777	$9,294	$168.67	$145.07 - $195.00
Q3 2024	60,244	$11,678	$209.21	$188.78 - $238.00
Q2 2024	62,343	$14,452	$217.32	$189.44 - $237.54
Q1 2024	69,050	$14,889	$234.20	$211.02 - $268.30
Q4 2023	68,055	$17,611	$245.62	$220.86 - $269.43
Q3 2023	68,512	$17,608	$267.47	$251.85 - $287.60
Q2 2023	60,919	$17,353	$297.86	$273.39 - $319.76
Q1 2023	57,456	$15,974	$276.70	$254.80 - $295.90
Q4 2022	59,537	$16,487	$282.44	$250.31 - $311.88
Q3 2022	63,307	$16,903	$212.38	$193.65 - $283.44
Q2 2022	72,276	$14,740	$204.43	$187.16 - $225.50
Q1 2022	81,185	$17,098	$217.46	$192.67 - $249.00
Q4 2021	88,780	$21,300	$257.12	$221.72 - $290.76
Q3 2021	78,671	$22,263	$327.75	$282.64 - $372.12
Q2 2021	81,838	$28,339	$302.94	$257.03 - $468.55
Q1 2021	79,799	$22,324	$269.69	$238.40 - $296.38
Q4 2020	94,669	$23,180	$259.08	$223.25 - $363.92
Q3 2020	101,371	$28,757	$278.91	$261.87 - $312.00
Q2 2020	117,091	$31,327	$300.59	$257.60 - $350.24
Q1 2020	104,220	$32,973	$303.47	$262.25 - $374.99
Q4 2019	144,195	$42,788	$277.46	$219.70 - $318.00
Q3 2019	156,335	$36,398	$232.85	$215.78 - $246.99
Q4 2018	156,206	$47,005	$319.14	$278.46 - $358.41
Q3 2018	155,762	$55,032	$344.30	$288.13 - $388.67
Q2 2018	171,127	$49,669	$281.15	$249.17 - $310.91
Q1 2018	320,632	$87,796	$310.41	$259.76 - $370.57
Q4 2017	281,505	$89,679	$320.80	$301.81 - $348.84
Q3 2017	339,085	$106,172	$296.11	$269.50 - $330.00
Q2 2017	375,808	$101,980	$264.42	$244.28 - $291.90
Q1 2017	331,932	$90,755	$282.75	$260.50 - $301.42
Q4 2016	329,979	$93,576	$296.43	$268.00 - $329.83
Q3 2016	305,959	$95,774	$296.18	$240.07 - $333.65
Q2 2016	309,944	$74,950	$263.54	$223.02 - $292.69
Q1 2016	339,479	$88,373	$264.15	$242.07 - $301.02
Q4 2015	395,741	$121,235	$287.35	$254.00 - $311.65
Q3 2015	367,576	$107,263	$330.23	$265.00 - $412.24
Q2 2015	389,787	$157,450	$401.33	$368.88 - $432.88
Q1 2015	356,796	$150,654	$394.14	$334.40 - $480.18
Q4 2014	302,709	$102,755	$323.51	$290.85 - $361.93
Q3 2014	296,395	$98,050	$329.72	$298.31 - $349.00
Q2 2014	279,925	$88,263	$300.97	$272.02 - $322.25
Q1 2014	282,309	$86,350	$317.43	$270.62 - $358.89
Q4 2013	276,244	$77,280	$258.65	$221.07 - $298.82
Q3 2013	258,709	$62,286	$223.81	$203.55 - $248.95
Q2 2013	230,642	$49,634	$213.68	$191.80 - $242.64