908 DEVICES INC

Ticker: MASS CUSIP: 65443P102 Class: Common Stock

RTW INVESTMENTS, LP's Holding History (CIK: 0001493215)

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

Q4 2022
Shares 312,000 Value ($000) $2,377 Avg Close $12.10 Range $6.87 - $18.02
Q3 2022
Shares 312,000 Value ($000) $5,132 Avg Close $19.42 Range $14.86 - $26.00
Q2 2022
Shares 512,957 Value ($000) $10,562 Avg Close $16.80 Range $12.67 - $21.38
Q1 2022
Shares 40,000 Value ($000) $760 Avg Close $17.19 Range $12.60 - $26.63
Q4 2021
Shares 40,000 Value ($000) $1,035 Avg Close $29.42 Range $22.21 - $39.34
Q3 2021
Shares 40,000 Value ($000) $1,301 Avg Close $33.97 Range $29.20 - $39.81
Q2 2021
Shares 40,000 Value ($000) $1,550 Avg Close $45.29 Range $33.71 - $55.83
Q1 2021
Shares 40,000 Value ($000) $1,940 Avg Close $57.14 Range $38.88 - $79.60
Q4 2020
Shares 40,000 Value ($000) $2,278 Avg Close $58.41 Range $43.25 - $74.00