BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

NATIXIS's Holding History (CIK: 0001274981)

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

Q4 2025

Shares 29,104 Value ($000) $5,122 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 24,036 Value ($000) $3,367 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 34,781 Value ($000) $4,368 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 29,905 Value ($000) $4,077 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 28,392 Value ($000) $4,342 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 116,449 Value ($000) $22,572 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 107,481 Value ($000) $24,916 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 101,738 Value ($000) $21,938 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 67,073 Value ($000) $17,356 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 21,535 Value ($000) $5,535 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 31,937 Value ($000) $9,097 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 16,269 Value ($000) $4,523 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 145,264 Value ($000) $40,227 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 92,091 Value ($000) $24,592 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 136,591 Value ($000) $28,040 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 93,267 Value ($000) $19,642 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 215,674 Value ($000) $51,745 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 88,585 Value ($000) $25,069 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 107,304 Value ($000) $37,156 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 43,314 Value ($000) $12,117 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 86,537 Value ($000) $21,189 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 16,933 Value ($000) $4,804 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 32,475 Value ($000) $8,689 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 73,261 Value ($000) $23,178 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 183,563 Value ($000) $54,336 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 159,810 Value ($000) $37,207 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 142,640 Value ($000) $33,359 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 271,974 Value ($000) $63,321 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 35,180 Value ($000) $10,586 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 97,061 Value ($000) $34,293 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 140,745 Value ($000) $40,850 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 131,058 Value ($000) $35,886 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 98,870 Value ($000) $31,497 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 72,044 Value ($000) $22,558 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 221,238 Value ($000) $60,035 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 201,476 Value ($000) $55,088 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 187,346 Value ($000) $53,128 Avg Close $296.43 Range $268.00 - $329.83

Q2 2016

Shares 126,274 Value ($000) $30,536 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 125,360 Value ($000) $32,634 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 150,035 Value ($000) $45,963 Avg Close $287.35 Range $254.00 - $311.65

Q2 2015

Shares 779 Value ($000) $315 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 31,323 Value ($000) $13,226 Avg Close $394.14 Range $334.40 - $480.18

Q3 2014

Shares 3,133 Value ($000) $1,036 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 36,093 Value ($000) $11,380 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 58,262 Value ($000) $17,821 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 200,664 Value ($000) $56,136 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 220,900 Value ($000) $53,184 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 108,900 Value ($000) $23,435 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	29,104	$5,122	$163.37	$138.00 - $185.17
Q3 2025	24,036	$3,367	$135.17	$121.05 - $150.28
Q2 2025	34,781	$4,368	$124.60	$110.04 - $137.32
Q1 2025	29,905	$4,077	$142.96	$128.51 - $157.09
Q4 2024	28,392	$4,342	$168.67	$145.07 - $195.00
Q3 2024	116,449	$22,572	$209.21	$188.78 - $238.00
Q2 2024	107,481	$24,916	$217.32	$189.44 - $237.54
Q1 2024	101,738	$21,938	$234.20	$211.02 - $268.30
Q4 2023	67,073	$17,356	$245.62	$220.86 - $269.43
Q3 2023	21,535	$5,535	$267.47	$251.85 - $287.60
Q2 2023	31,937	$9,097	$297.86	$273.39 - $319.76
Q1 2023	16,269	$4,523	$276.70	$254.80 - $295.90
Q4 2022	145,264	$40,227	$282.44	$250.31 - $311.88
Q3 2022	92,091	$24,592	$212.38	$193.65 - $283.44
Q2 2022	136,591	$28,040	$204.43	$187.16 - $225.50
Q1 2022	93,267	$19,642	$217.46	$192.67 - $249.00
Q4 2021	215,674	$51,745	$257.12	$221.72 - $290.76
Q3 2021	88,585	$25,069	$327.75	$282.64 - $372.12
Q2 2021	107,304	$37,156	$302.94	$257.03 - $468.55
Q1 2021	43,314	$12,117	$269.69	$238.40 - $296.38
Q4 2020	86,537	$21,189	$259.08	$223.25 - $363.92
Q3 2020	16,933	$4,804	$278.91	$261.87 - $312.00
Q2 2020	32,475	$8,689	$300.59	$257.60 - $350.24
Q1 2020	73,261	$23,178	$303.47	$262.25 - $374.99
Q4 2019	183,563	$54,336	$277.46	$219.70 - $318.00
Q3 2019	159,810	$37,207	$232.85	$215.78 - $246.99
Q2 2019	142,640	$33,359	$230.90	$219.20 - $245.35
Q1 2019	271,974	$63,321	$314.89	$216.12 - $344.00
Q4 2018	35,180	$10,586	$319.14	$278.46 - $358.41
Q3 2018	97,061	$34,293	$344.30	$288.13 - $388.67
Q2 2018	140,745	$40,850	$281.15	$249.17 - $310.91
Q1 2018	131,058	$35,886	$310.41	$259.76 - $370.57
Q4 2017	98,870	$31,497	$320.80	$301.81 - $348.84
Q3 2017	72,044	$22,558	$296.11	$269.50 - $330.00
Q2 2017	221,238	$60,035	$264.42	$244.28 - $291.90
Q1 2017	201,476	$55,088	$282.75	$260.50 - $301.42
Q4 2016	187,346	$53,128	$296.43	$268.00 - $329.83
Q2 2016	126,274	$30,536	$263.54	$223.02 - $292.69
Q1 2016	125,360	$32,634	$264.15	$242.07 - $301.02
Q4 2015	150,035	$45,963	$287.35	$254.00 - $311.65
Q2 2015	779	$315	$401.33	$368.88 - $432.88
Q1 2015	31,323	$13,226	$394.14	$334.40 - $480.18
Q3 2014	3,133	$1,036	$329.72	$298.31 - $349.00
Q2 2014	36,093	$11,380	$300.97	$272.02 - $322.25
Q1 2014	58,262	$17,821	$317.43	$270.62 - $358.89
Q4 2013	200,664	$56,136	$258.65	$221.07 - $298.82
Q3 2013	220,900	$53,184	$223.81	$203.55 - $248.95
Q2 2013	108,900	$23,435	$213.68	$191.80 - $242.64