BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

RHUMBLINE ADVISERS's Holding History (CIK: 0001115418)

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

Q4 2025

Shares 271,746 Value ($000) $47,824 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 289,206 Value ($000) $40,512 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 300,147 Value ($000) $37,695 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 296,294 Value ($000) $40,545 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 268,591 Value ($000) $41,073 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 274,309 Value ($000) $53,172 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 284,206 Value ($000) $65,885 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 278,644 Value ($000) $60,084 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 278,047 Value ($000) $71,950 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 278,552 Value ($000) $71,591 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 280,736 Value ($000) $79,968 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 279,780 Value ($000) $78 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 278,605 Value ($000) $77 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 273,246 Value ($000) $72,957 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 263,164 Value ($000) $53,670 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 250,960 Value ($000) $52,852 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 273,699 Value ($000) $65,666 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 269,433 Value ($000) $76,247 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 274,339 Value ($000) $94,995 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 293,917 Value ($000) $82,223 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 309,476 Value ($000) $75,778 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 352,784 Value ($000) $100,078 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 357,189 Value ($000) $95,566 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 355,517 Value ($000) $112,478 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 351,699 Value ($000) $104,360 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 353,751 Value ($000) $82,360 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 357,033 Value ($000) $83,499 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 336,108 Value ($000) $79,449 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 324,667 Value ($000) $97,699 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 326,131 Value ($000) $115,225 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 345,260 Value ($000) $100,208 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 339,506 Value ($000) $92,964 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 346,472 Value ($000) $110,376 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 339,077 Value ($000) $106,172 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 335,256 Value ($000) $90,975 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 338,632 Value ($000) $92,589 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 367,665 Value ($000) $104,262 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 357,364 Value ($000) $111,866 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 348,831 Value ($000) $84,354 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 334,219 Value ($000) $87,004 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 325,298 Value ($000) $99,655 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 336,887 Value ($000) $98,307 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 334,433 Value ($000) $135,091 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 391,065 Value ($000) $165,123 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 397,928 Value ($000) $135,077 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 405,067 Value ($000) $134,000 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 407,309 Value ($000) $128,429 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 426,187 Value ($000) $130,358 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 434,016 Value ($000) $121,416 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 444,476 Value ($000) $107,012 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 452,600 Value ($000) $97,400 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	271,746	$47,824	$163.37	$138.00 - $185.17
Q3 2025	289,206	$40,512	$135.17	$121.05 - $150.28
Q2 2025	300,147	$37,695	$124.60	$110.04 - $137.32
Q1 2025	296,294	$40,545	$142.96	$128.51 - $157.09
Q4 2024	268,591	$41,073	$168.67	$145.07 - $195.00
Q3 2024	274,309	$53,172	$209.21	$188.78 - $238.00
Q2 2024	284,206	$65,885	$217.32	$189.44 - $237.54
Q1 2024	278,644	$60,084	$234.20	$211.02 - $268.30
Q4 2023	278,047	$71,950	$245.62	$220.86 - $269.43
Q3 2023	278,552	$71,591	$267.47	$251.85 - $287.60
Q2 2023	280,736	$79,968	$297.86	$273.39 - $319.76
Q1 2023	279,780	$78	$276.70	$254.80 - $295.90
Q4 2022	278,605	$77	$282.44	$250.31 - $311.88
Q3 2022	273,246	$72,957	$212.38	$193.65 - $283.44
Q2 2022	263,164	$53,670	$204.43	$187.16 - $225.50
Q1 2022	250,960	$52,852	$217.46	$192.67 - $249.00
Q4 2021	273,699	$65,666	$257.12	$221.72 - $290.76
Q3 2021	269,433	$76,247	$327.75	$282.64 - $372.12
Q2 2021	274,339	$94,995	$302.94	$257.03 - $468.55
Q1 2021	293,917	$82,223	$269.69	$238.40 - $296.38
Q4 2020	309,476	$75,778	$259.08	$223.25 - $363.92
Q3 2020	352,784	$100,078	$278.91	$261.87 - $312.00
Q2 2020	357,189	$95,566	$300.59	$257.60 - $350.24
Q1 2020	355,517	$112,478	$303.47	$262.25 - $374.99
Q4 2019	351,699	$104,360	$277.46	$219.70 - $318.00
Q3 2019	353,751	$82,360	$232.85	$215.78 - $246.99
Q2 2019	357,033	$83,499	$230.90	$219.20 - $245.35
Q1 2019	336,108	$79,449	$314.89	$216.12 - $344.00
Q4 2018	324,667	$97,699	$319.14	$278.46 - $358.41
Q3 2018	326,131	$115,225	$344.30	$288.13 - $388.67
Q2 2018	345,260	$100,208	$281.15	$249.17 - $310.91
Q1 2018	339,506	$92,964	$310.41	$259.76 - $370.57
Q4 2017	346,472	$110,376	$320.80	$301.81 - $348.84
Q3 2017	339,077	$106,172	$296.11	$269.50 - $330.00
Q2 2017	335,256	$90,975	$264.42	$244.28 - $291.90
Q1 2017	338,632	$92,589	$282.75	$260.50 - $301.42
Q4 2016	367,665	$104,262	$296.43	$268.00 - $329.83
Q3 2016	357,364	$111,866	$296.18	$240.07 - $333.65
Q2 2016	348,831	$84,354	$263.54	$223.02 - $292.69
Q1 2016	334,219	$87,004	$264.15	$242.07 - $301.02
Q4 2015	325,298	$99,655	$287.35	$254.00 - $311.65
Q3 2015	336,887	$98,307	$330.23	$265.00 - $412.24
Q2 2015	334,433	$135,091	$401.33	$368.88 - $432.88
Q1 2015	391,065	$165,123	$394.14	$334.40 - $480.18
Q4 2014	397,928	$135,077	$323.51	$290.85 - $361.93
Q3 2014	405,067	$134,000	$329.72	$298.31 - $349.00
Q2 2014	407,309	$128,429	$300.97	$272.02 - $322.25
Q1 2014	426,187	$130,358	$317.43	$270.62 - $358.89
Q4 2013	434,016	$121,416	$258.65	$221.07 - $298.82
Q3 2013	444,476	$107,012	$223.81	$203.55 - $248.95
Q2 2013	452,600	$97,400	$213.68	$191.80 - $242.64