908 DEVICES INC

Ticker: MASS CUSIP: 65443P102 Class: Common Stock

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q4 2025
Shares 132 Value ($000) $1 Avg Close $6.99 Range $5.16 - $9.34
Q1 2023
Shares 95 Value ($000) $1 Avg Close $8.92 Range $6.38 - $10.97
Q4 2022
Shares 58 Value ($000) $0 Avg Close $12.10 Range $6.87 - $18.02