908 DEVICES INC

Ticker: MASS CUSIP: 65443P102 Class: Common Stock

Capital World Investors's Holding History (CIK: 0001422849)

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

Q1 2022

Shares 112,500 Value ($000) $2,139 Avg Close $17.19 Range $12.60 - $26.63

Q4 2021

Shares 112,500 Value ($000) $2,910 Avg Close $29.42 Range $22.21 - $39.34

Q3 2021

Shares 112,500 Value ($000) $3,659 Avg Close $33.97 Range $29.20 - $39.81

Q2 2021

Shares 112,500 Value ($000) $4,359 Avg Close $45.29 Range $33.71 - $55.83

Q1 2021

Shares 112,500 Value ($000) $5,456 Avg Close $57.14 Range $38.88 - $79.60

Q4 2020

Shares 425,000 Value ($000) $24,204 Avg Close $58.41 Range $43.25 - $74.00

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2022	112,500	$2,139	$17.19	$12.60 - $26.63
Q4 2021	112,500	$2,910	$29.42	$22.21 - $39.34
Q3 2021	112,500	$3,659	$33.97	$29.20 - $39.81
Q2 2021	112,500	$4,359	$45.29	$33.71 - $55.83
Q1 2021	112,500	$5,456	$57.14	$38.88 - $79.60
Q4 2020	425,000	$24,204	$58.41	$43.25 - $74.00