908 DEVICES INC

Ticker: MASS CUSIP: 65443P102 Class: Common Stock

Rock Creek Group, LP's Holding History (CIK: 0001484067)

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

Q4 2021

Shares 18,392 Value ($000) $291 Avg Close $29.42 Range $22.21 - $39.34

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2021	18,392	$291	$29.42	$22.21 - $39.34