908 DEVICES INC

Ticker: MASS CUSIP: 65443P102 Class: Common Stock

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q4 2025

Shares 482,614 Value ($000) $2,534 Avg Close $6.99 Range $5.16 - $9.34

Q3 2025

Shares 493,949 Value ($000) $4,327 Avg Close $6.64 Range $5.32 - $8.79

Q2 2025

Shares 477,342 Value ($000) $3,403 Avg Close $5.56 Range $3.55 - $8.06

Q1 2025

Shares 480,549 Value ($000) $2,153 Avg Close $2.96 Range $1.92 - $4.80

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	482,614	$2,534	$6.99	$5.16 - $9.34
Q3 2025	493,949	$4,327	$6.64	$5.32 - $8.79
Q2 2025	477,342	$3,403	$5.56	$3.55 - $8.06
Q1 2025	480,549	$2,153	$2.96	$1.92 - $4.80