BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

PRINCIPAL FINANCIAL GROUP INC's Holding History (CIK: 0001126328)

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

Q4 2025

Shares 184,189 Value ($000) $32,415 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 157,842 Value ($000) $22,111 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 159,761 Value ($000) $20,064 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 164,836 Value ($000) $22,556 Avg Close $142.96 Range $128.51 - $157.09

Q4 2024

Shares 164,700 Value ($000) $25,186 Avg Close $168.67 Range $145.07 - $195.00

Q3 2024

Shares 168,631 Value ($000) $32,687 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 163,361 Value ($000) $37,870 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 166,602 Value ($000) $35,924 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 164,533 Value ($000) $42,576 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 167,675 Value ($000) $43,094 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 170,210 Value ($000) $48,484 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 176,377 Value ($000) $49,038 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 172,887 Value ($000) $47,876 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 180,732 Value ($000) $48,255 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 184,295 Value ($000) $37,585 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 170,636 Value ($000) $35,936 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 172,562 Value ($000) $41,401 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 179,514 Value ($000) $50,801 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 178,953 Value ($000) $61,966 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 180,558 Value ($000) $50,511 Avg Close $269.69 Range $238.40 - $296.38

Q4 2020

Shares 198,390 Value ($000) $48,578 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 218,638 Value ($000) $62,023 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 238,481 Value ($000) $63,805 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 253,602 Value ($000) $80,235 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 272,821 Value ($000) $80,955 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 286,235 Value ($000) $66,642 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 300,154 Value ($000) $70,198 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 345,999 Value ($000) $81,788 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 428,646 Value ($000) $128,989 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 443,917 Value ($000) $156,841 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 406,712 Value ($000) $118,045 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 408,500 Value ($000) $111,855 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 435,361 Value ($000) $138,693 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 452,536 Value ($000) $141,698 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 414,821 Value ($000) $112,566 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 370,667 Value ($000) $101,348 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 336,554 Value ($000) $95,440 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 333,229 Value ($000) $104,312 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 318,150 Value ($000) $76,935 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 311,151 Value ($000) $81,000 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 308,981 Value ($000) $94,657 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 371,884 Value ($000) $108,520 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 318,113 Value ($000) $128,499 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 312,027 Value ($000) $131,751 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 337,737 Value ($000) $114,645 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 336,841 Value ($000) $111,431 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 305,465 Value ($000) $96,316 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 344,383 Value ($000) $105,337 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 354,874 Value ($000) $99,274 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 417,388 Value ($000) $100,491 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 308,392 Value ($000) $66,366 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	184,189	$32,415	$163.37	$138.00 - $185.17
Q3 2025	157,842	$22,111	$135.17	$121.05 - $150.28
Q2 2025	159,761	$20,064	$124.60	$110.04 - $137.32
Q1 2025	164,836	$22,556	$142.96	$128.51 - $157.09
Q4 2024	164,700	$25,186	$168.67	$145.07 - $195.00
Q3 2024	168,631	$32,687	$209.21	$188.78 - $238.00
Q2 2024	163,361	$37,870	$217.32	$189.44 - $237.54
Q1 2024	166,602	$35,924	$234.20	$211.02 - $268.30
Q4 2023	164,533	$42,576	$245.62	$220.86 - $269.43
Q3 2023	167,675	$43,094	$267.47	$251.85 - $287.60
Q2 2023	170,210	$48,484	$297.86	$273.39 - $319.76
Q1 2023	176,377	$49,038	$276.70	$254.80 - $295.90
Q4 2022	172,887	$47,876	$282.44	$250.31 - $311.88
Q3 2022	180,732	$48,255	$212.38	$193.65 - $283.44
Q2 2022	184,295	$37,585	$204.43	$187.16 - $225.50
Q1 2022	170,636	$35,936	$217.46	$192.67 - $249.00
Q4 2021	172,562	$41,401	$257.12	$221.72 - $290.76
Q3 2021	179,514	$50,801	$327.75	$282.64 - $372.12
Q2 2021	178,953	$61,966	$302.94	$257.03 - $468.55
Q1 2021	180,558	$50,511	$269.69	$238.40 - $296.38
Q4 2020	198,390	$48,578	$259.08	$223.25 - $363.92
Q3 2020	218,638	$62,023	$278.91	$261.87 - $312.00
Q2 2020	238,481	$63,805	$300.59	$257.60 - $350.24
Q1 2020	253,602	$80,235	$303.47	$262.25 - $374.99
Q4 2019	272,821	$80,955	$277.46	$219.70 - $318.00
Q3 2019	286,235	$66,642	$232.85	$215.78 - $246.99
Q2 2019	300,154	$70,198	$230.90	$219.20 - $245.35
Q1 2019	345,999	$81,788	$314.89	$216.12 - $344.00
Q4 2018	428,646	$128,989	$319.14	$278.46 - $358.41
Q3 2018	443,917	$156,841	$344.30	$288.13 - $388.67
Q2 2018	406,712	$118,045	$281.15	$249.17 - $310.91
Q1 2018	408,500	$111,855	$310.41	$259.76 - $370.57
Q4 2017	435,361	$138,693	$320.80	$301.81 - $348.84
Q3 2017	452,536	$141,698	$296.11	$269.50 - $330.00
Q2 2017	414,821	$112,566	$264.42	$244.28 - $291.90
Q1 2017	370,667	$101,348	$282.75	$260.50 - $301.42
Q4 2016	336,554	$95,440	$296.43	$268.00 - $329.83
Q3 2016	333,229	$104,312	$296.18	$240.07 - $333.65
Q2 2016	318,150	$76,935	$263.54	$223.02 - $292.69
Q1 2016	311,151	$81,000	$264.15	$242.07 - $301.02
Q4 2015	308,981	$94,657	$287.35	$254.00 - $311.65
Q3 2015	371,884	$108,520	$330.23	$265.00 - $412.24
Q2 2015	318,113	$128,499	$401.33	$368.88 - $432.88
Q1 2015	312,027	$131,751	$394.14	$334.40 - $480.18
Q4 2014	337,737	$114,645	$323.51	$290.85 - $361.93
Q3 2014	336,841	$111,431	$329.72	$298.31 - $349.00
Q2 2014	305,465	$96,316	$300.97	$272.02 - $322.25
Q1 2014	344,383	$105,337	$317.43	$270.62 - $358.89
Q4 2013	354,874	$99,274	$258.65	$221.07 - $298.82
Q3 2013	417,388	$100,491	$223.81	$203.55 - $248.95
Q2 2013	308,392	$66,366	$213.68	$191.80 - $242.64