908 DEVICES INC

Ticker: MASS CUSIP: 65443P102 Class: Common Stock

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q4 2020

Shares 299,969 Value ($000) $17,083 Avg Close $58.41 Range $43.25 - $74.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	299,969	$17,083	$58.41	$43.25 - $74.00