AMPRIUS TECHNOLOGIES INC

Ticker: AMPX CUSIP: 03214Q108 Class: Common Stock

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

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

Q4 2025

Shares 516,765 Value ($000) $4,077 Avg Close $11.43 Range $7.71 - $16.03

Q3 2025

Shares 697,387 Value ($000) $7,337 Avg Close $7.87 Range $3.80 - $12.29

Q2 2025

Shares 1,025,357 Value ($000) $4,317 Avg Close $2.81 Range $1.97 - $4.35

Q1 2025

Shares 935,815 Value ($000) $2,508 Avg Close $2.95 Range $1.70 - $4.21

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	516,765	$4,077	$11.43	$7.71 - $16.03
Q3 2025	697,387	$7,337	$7.87	$3.80 - $12.29
Q2 2025	1,025,357	$4,317	$2.81	$1.97 - $4.35
Q1 2025	935,815	$2,508	$2.95	$1.70 - $4.21