BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

ARDSLEY ADVISORY PARTNERS LP's Holding History (CIK: 0000900529)

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

Q3 2020

Shares 250 Value ($000) $71 Avg Close $278.91 Range $261.87 - $312.00

Q4 2019

Shares 1,500 Value ($000) $445 Avg Close $277.46 Range $219.70 - $318.00

Q2 2015

Shares 1,000 Value ($000) $406 Avg Close $401.33 Range $368.88 - $432.88

Q3 2014

Shares 1,500 Value ($000) $496 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 1,500 Value ($000) $473 Avg Close $300.97 Range $272.02 - $322.25

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2020	250	$71	$278.91	$261.87 - $312.00
Q4 2019	1,500	$445	$277.46	$219.70 - $318.00
Q2 2015	1,000	$406	$401.33	$368.88 - $432.88
Q3 2014	1,500	$496	$329.72	$298.31 - $349.00
Q2 2014	1,500	$473	$300.97	$272.02 - $322.25