908 DEVICES INC

Ticker: MASS CUSIP: 65443P102 Class: Common Stock

ADAGE CAPITAL PARTNERS GP, L.L.C.'s Holding History (CIK: 0001165408)

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

Q4 2020

Shares 150,000 Value ($000) $8,543 Avg Close $58.41 Range $43.25 - $74.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	150,000	$8,543	$58.41	$43.25 - $74.00