908 DEVICES INC

Ticker: MASS CUSIP: 65443P102 Class: Common Stock

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

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

Q4 2025

Shares 466 Value ($000) $2 Avg Close $6.99 Range $5.16 - $9.34

Q3 2025

Shares 466 Value ($000) $4 Avg Close $6.64 Range $5.32 - $8.79

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	466	$2	$6.99	$5.16 - $9.34
Q3 2025	466	$4	$6.64	$5.32 - $8.79