BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

PARNASSUS INVESTMENTS, LLC's Holding History (CIK: 0000948669)

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

Q3 2024

Shares 361,512 Value ($000) $70,075 Avg Close $209.21 Range $188.78 - $238.00

Q2 2024

Shares 360,742 Value ($000) $83,627 Avg Close $217.32 Range $189.44 - $237.54

Q1 2024

Shares 360,742 Value ($000) $77,787 Avg Close $234.20 Range $211.02 - $268.30

Q4 2023

Shares 360,742 Value ($000) $93,349 Avg Close $245.62 Range $220.86 - $269.43

Q3 2023

Shares 360,742 Value ($000) $92,714 Avg Close $267.47 Range $251.85 - $287.60

Q2 2023

Shares 305,808 Value ($000) $87,109 Avg Close $297.86 Range $273.39 - $319.76

Q1 2023

Shares 305,808 Value ($000) $85,024 Avg Close $276.70 Range $254.80 - $295.90

Q4 2022

Shares 305,808 Value ($000) $84,684 Avg Close $282.44 Range $250.31 - $311.88

Q3 2022

Shares 347,751 Value ($000) $92,850 Avg Close $212.38 Range $193.65 - $283.44

Q2 2022

Shares 452,053 Value ($000) $92,192 Avg Close $204.43 Range $187.16 - $225.50

Q1 2022

Shares 452,053 Value ($000) $95,202 Avg Close $217.46 Range $192.67 - $249.00

Q4 2021

Shares 452,053 Value ($000) $108,457 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 452,053 Value ($000) $127,926 Avg Close $327.75 Range $282.64 - $372.12

Q2 2021

Shares 452,053 Value ($000) $156,532 Avg Close $302.94 Range $257.03 - $468.55

Q1 2021

Shares 314,412 Value ($000) $87,957 Avg Close $269.69 Range $238.40 - $296.38

Q3 2019

Shares 574,416 Value ($000) $133,736 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 925,000 Value ($000) $216,330 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 630,000 Value ($000) $148,919 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 350,000 Value ($000) $105,322 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 55,000 Value ($000) $19,432 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 55,000 Value ($000) $15,963 Avg Close $281.15 Range $249.17 - $310.91

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2024	361,512	$70,075	$209.21	$188.78 - $238.00
Q2 2024	360,742	$83,627	$217.32	$189.44 - $237.54
Q1 2024	360,742	$77,787	$234.20	$211.02 - $268.30
Q4 2023	360,742	$93,349	$245.62	$220.86 - $269.43
Q3 2023	360,742	$92,714	$267.47	$251.85 - $287.60
Q2 2023	305,808	$87,109	$297.86	$273.39 - $319.76
Q1 2023	305,808	$85,024	$276.70	$254.80 - $295.90
Q4 2022	305,808	$84,684	$282.44	$250.31 - $311.88
Q3 2022	347,751	$92,850	$212.38	$193.65 - $283.44
Q2 2022	452,053	$92,192	$204.43	$187.16 - $225.50
Q1 2022	452,053	$95,202	$217.46	$192.67 - $249.00
Q4 2021	452,053	$108,457	$257.12	$221.72 - $290.76
Q3 2021	452,053	$127,926	$327.75	$282.64 - $372.12
Q2 2021	452,053	$156,532	$302.94	$257.03 - $468.55
Q1 2021	314,412	$87,957	$269.69	$238.40 - $296.38
Q3 2019	574,416	$133,736	$232.85	$215.78 - $246.99
Q2 2019	925,000	$216,330	$230.90	$219.20 - $245.35
Q1 2019	630,000	$148,919	$314.89	$216.12 - $344.00
Q4 2018	350,000	$105,322	$319.14	$278.46 - $358.41
Q3 2018	55,000	$19,432	$344.30	$288.13 - $388.67
Q2 2018	55,000	$15,963	$281.15	$249.17 - $310.91