BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

CITIGROUP INC's Holding History (CIK: 0000831001)

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

Q4 2025

Shares 573,844 Value ($000) $100,991 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 202,299 Value ($000) $28,338 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 223,240 Value ($000) $28,037 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 302,615 Value ($000) $41,410 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 264,339 Value ($000) $40,423 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 238,148 Value ($000) $46,163 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 223,347 Value ($000) $51,776 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 218,717 Value ($000) $47,162 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 220,653 Value ($000) $57,098 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 221,758 Value ($000) $56,994 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 234,902 Value ($000) $66,912 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 229,966 Value ($000) $63,937 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 196,826 Value ($000) $54,505 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 255,210 Value ($000) $68,141 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 186,323 Value ($000) $37,997 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 205,778 Value ($000) $43,336 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 382,734 Value ($000) $91,826 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 270,673 Value ($000) $76,597 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 275,535 Value ($000) $95,409 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 252,788 Value ($000) $70,719 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 293,250 Value ($000) $71,804 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 196,803 Value ($000) $55,828 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 218,637 Value ($000) $58,495 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 208,893 Value ($000) $66,090 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 304,181 Value ($000) $90,259 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 264,356 Value ($000) $61,546 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 285,073 Value ($000) $66,671 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 183,724 Value ($000) $43,430 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 241,553 Value ($000) $72,689 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 200,963 Value ($000) $71,002 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 177,495 Value ($000) $51,516 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 281,790 Value ($000) $77,160 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 235,534 Value ($000) $75,035 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 282,859 Value ($000) $88,569 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 179,108 Value ($000) $48,603 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 133,936 Value ($000) $36,620 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 231,618 Value ($000) $65,682 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 77,581 Value ($000) $24,285 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 107,240 Value ($000) $25,933 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 79,779 Value ($000) $20,767 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 82,905 Value ($000) $25,398 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 109,657 Value ($000) $31,999 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 141,436 Value ($000) $57,132 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 168,363 Value ($000) $71,088 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 251,891 Value ($000) $85,505 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 124,313 Value ($000) $41,123 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 164,277 Value ($000) $51,797 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 139,438 Value ($000) $42,650 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 143,445 Value ($000) $40,128 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 188,763 Value ($000) $45,446 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 216,826 Value ($000) $46,662 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	573,844	$100,991	$163.37	$138.00 - $185.17
Q3 2025	202,299	$28,338	$135.17	$121.05 - $150.28
Q2 2025	223,240	$28,037	$124.60	$110.04 - $137.32
Q1 2025	302,615	$41,410	$142.96	$128.51 - $157.09
Q4 2024	264,339	$40,423	$168.67	$145.07 - $195.00
Q3 2024	238,148	$46,163	$209.21	$188.78 - $238.00
Q2 2024	223,347	$51,776	$217.32	$189.44 - $237.54
Q1 2024	218,717	$47,162	$234.20	$211.02 - $268.30
Q4 2023	220,653	$57,098	$245.62	$220.86 - $269.43
Q3 2023	221,758	$56,994	$267.47	$251.85 - $287.60
Q2 2023	234,902	$66,912	$297.86	$273.39 - $319.76
Q1 2023	229,966	$63,937	$276.70	$254.80 - $295.90
Q4 2022	196,826	$54,505	$282.44	$250.31 - $311.88
Q3 2022	255,210	$68,141	$212.38	$193.65 - $283.44
Q2 2022	186,323	$37,997	$204.43	$187.16 - $225.50
Q1 2022	205,778	$43,336	$217.46	$192.67 - $249.00
Q4 2021	382,734	$91,826	$257.12	$221.72 - $290.76
Q3 2021	270,673	$76,597	$327.75	$282.64 - $372.12
Q2 2021	275,535	$95,409	$302.94	$257.03 - $468.55
Q1 2021	252,788	$70,719	$269.69	$238.40 - $296.38
Q4 2020	293,250	$71,804	$259.08	$223.25 - $363.92
Q3 2020	196,803	$55,828	$278.91	$261.87 - $312.00
Q2 2020	218,637	$58,495	$300.59	$257.60 - $350.24
Q1 2020	208,893	$66,090	$303.47	$262.25 - $374.99
Q4 2019	304,181	$90,259	$277.46	$219.70 - $318.00
Q3 2019	264,356	$61,546	$232.85	$215.78 - $246.99
Q2 2019	285,073	$66,671	$230.90	$219.20 - $245.35
Q1 2019	183,724	$43,430	$314.89	$216.12 - $344.00
Q4 2018	241,553	$72,689	$319.14	$278.46 - $358.41
Q3 2018	200,963	$71,002	$344.30	$288.13 - $388.67
Q2 2018	177,495	$51,516	$281.15	$249.17 - $310.91
Q1 2018	281,790	$77,160	$310.41	$259.76 - $370.57
Q4 2017	235,534	$75,035	$320.80	$301.81 - $348.84
Q3 2017	282,859	$88,569	$296.11	$269.50 - $330.00
Q2 2017	179,108	$48,603	$264.42	$244.28 - $291.90
Q1 2017	133,936	$36,620	$282.75	$260.50 - $301.42
Q4 2016	231,618	$65,682	$296.43	$268.00 - $329.83
Q3 2016	77,581	$24,285	$296.18	$240.07 - $333.65
Q2 2016	107,240	$25,933	$263.54	$223.02 - $292.69
Q1 2016	79,779	$20,767	$264.15	$242.07 - $301.02
Q4 2015	82,905	$25,398	$287.35	$254.00 - $311.65
Q3 2015	109,657	$31,999	$330.23	$265.00 - $412.24
Q2 2015	141,436	$57,132	$401.33	$368.88 - $432.88
Q1 2015	168,363	$71,088	$394.14	$334.40 - $480.18
Q4 2014	251,891	$85,505	$323.51	$290.85 - $361.93
Q3 2014	124,313	$41,123	$329.72	$298.31 - $349.00
Q2 2014	164,277	$51,797	$300.97	$272.02 - $322.25
Q1 2014	139,438	$42,650	$317.43	$270.62 - $358.89
Q4 2013	143,445	$40,128	$258.65	$221.07 - $298.82
Q3 2013	188,763	$45,446	$223.81	$203.55 - $248.95
Q2 2013	216,826	$46,662	$213.68	$191.80 - $242.64