908 DEVICES INC

Ticker: MASS CUSIP: 65443P102 Class: Common Stock

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

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

Q4 2020

Shares 77,500 Value ($000) $4,414 Avg Close $58.41 Range $43.25 - $74.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	77,500	$4,414	$58.41	$43.25 - $74.00