BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

PERCEPTIVE ADVISORS LLC's Holding History (CIK: 0001224962)

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

Q4 2025

Shares 124,000 Value ($000) $21,823 Avg Close $163.37 Range $138.00 - $185.17

Q4 2021

Shares 48,600 Value ($000) $11,660 Avg Close $257.12 Range $221.72 - $290.76

Q3 2021

Shares 48,600 Value ($000) $13,753 Avg Close $327.75 Range $282.64 - $372.12

Q1 2018

Shares 20,000 Value ($000) $5,476 Avg Close $310.41 Range $259.76 - $370.57

Q4 2016

Shares 1,922 Value ($000) $545 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 1,921 Value ($000) $601 Avg Close $296.18 Range $240.07 - $333.65

Q4 2015

Shares 648 Value ($000) $199 Avg Close $287.35 Range $254.00 - $311.65

Q1 2015

Shares 18,200 Value ($000) $7,685 Avg Close $394.14 Range $334.40 - $480.18

Q4 2013

Shares 40,000 Value ($000) $11,190 Avg Close $258.65 Range $221.07 - $298.82

Q2 2013

Shares 231,282 Value ($000) $49,772 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	124,000	$21,823	$163.37	$138.00 - $185.17
Q4 2021	48,600	$11,660	$257.12	$221.72 - $290.76
Q3 2021	48,600	$13,753	$327.75	$282.64 - $372.12
Q1 2018	20,000	$5,476	$310.41	$259.76 - $370.57
Q4 2016	1,922	$545	$296.43	$268.00 - $329.83
Q3 2016	1,921	$601	$296.18	$240.07 - $333.65
Q4 2015	648	$199	$287.35	$254.00 - $311.65
Q1 2015	18,200	$7,685	$394.14	$334.40 - $480.18
Q4 2013	40,000	$11,190	$258.65	$221.07 - $298.82
Q2 2013	231,282	$49,772	$213.68	$191.80 - $242.64