Amprius Technologies Ownership & Insider Activity

Amprius Technologies (AMPX) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 3.9% of shares outstanding. Institutional investors hold 33.7%. Over the past 90 days, insiders made 3 sales worth $1.3M.

Shares Outstanding

146.081M

Shares Float

143.962M

Insider Shares Owned

5.661M

Insider % Owned

3.9%

Institutional Shares Held

49.283M

Institutional % Held

33.7%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$1.3M total

Net Activity

Net Selling

Net Value (90d)

-$1.3M

Amprius Technologies Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Aug 21, 2026	Kang Sun	DIRECTOR	SELL	62.101K	$10.34	$642K
Aug 21, 2026	Constantin Ionel Stefan	CHIEF TECHNOLOGY OFFICER	SELL	29.681K	$10.34	$307K
Aug 21, 2026	Thomas M Stepien	CHIEF EXECUTIVE OFFICER	SELL	46.529K	$10.26	$324K
Jun 12, 2026	Donald R Dixon	DIRECTOR	SELL	74.577K	$17.17	$1.5M
Jun 9, 2026	Donald R Dixon	DIRECTOR	SELL	40.000K	$19.13	$765K
Jun 4, 2026	Thomas M Stepien	CHIEF EXECUTIVE OFFICER	SELL	32.384K	$20.97	$42K
May 27, 2026	Kang Sun	DIRECTOR	SELL	356.000	$17.19	$6K
May 27, 2026	Thomas M Stepien	CHIEF EXECUTIVE OFFICER	SELL	4.375K	$17.19	$75K
May 27, 2026	Constantin Ionel Stefan	CHIEF TECHNOLOGY OFFICER	SELL	3.208K	$17.19	$55K
May 26, 2026	Donald R Dixon	DIRECTOR	SELL	17.895K	$17.90	$320K
May 21, 2026	Kang Sun	DIRECTOR	SELL	67.796K	$14.79	$1.0M
May 21, 2026	Constantin Ionel Stefan	CHIEF TECHNOLOGY OFFICER	SELL	28.812K	$14.79	$426K
May 21, 2026	Thomas M Stepien	CHIEF EXECUTIVE OFFICER	SELL	60.702K	$14.79	$898K
Apr 1, 2026	Kang Sun	DIRECTOR	SELL-OPTIONS	—	$8.96	$20.8M