Amprius Technologies, Inc. — Director's Dealing 2026

Jan 23, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Amprius Technologies, Inc. (AMPX)
CIK: 0001899287
Period of Report: 2026-01-21

Reporting Person: Stefan Constantin Ionel (Chief Technology Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-01-21	Common stock	M	41563	$0.62	Acquired	790259	Direct
2026-01-21	Common stock	M	15834	$0.05	Acquired	806093	Direct
2026-01-21	Common stock	M	15883	$0.05	Acquired	821976	Direct
2026-01-21	Common stock	S	73280	$12.0007	Disposed	748696	Direct
2026-01-22	Common stock	M	253928	$0.05	Acquired	1002624	Direct
2026-01-22	Common stock	M	72795	$0.45	Acquired	1075419	Direct
2026-01-22	Common stock	M	166104	$0.05	Acquired	1241523	Direct
2026-01-22	Common stock	S	492827	$12.0365	Disposed	748696	Direct
2026-01-23	Common stock	M	1600	$0.05	Acquired	750296	Direct
2026-01-23	Common stock	S	1600	$12	Disposed	748696	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-01-21	Stock Option (right to buy)	$0.62	M	41563	Disposed	2027-03-15	Common stock (41563)	Direct
2026-01-21	Stock Option (right to buy)	$0.05	M	15834	Disposed	2027-03-15	Common stock (15834)	Direct
2026-01-21	Stock Option (right to buy)	$0.05	M	15883	Disposed	2027-07-11	Common stock (15883)	Direct
2026-01-22	Stock Option (right to buy)	$0.05	M	253928	Disposed	2027-03-15	Common stock (253928)	Direct
2026-01-22	Stock Option (right to buy)	$0.45	M	72795	Disposed	2028-03-19	Common stock (72795)	Direct
2026-01-22	Stock Option (right to buy)	$0.05	M	166104	Disposed	2027-07-11	Common stock (166104)	Direct
2026-01-23	Stock Option (right to buy)	$0.05	M	1600	Disposed	2027-03-15	Common stock (1600)	Direct

Footnotes

F1: The exercises and sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 11, 2025.

F2: Includes 585,697 restricted stock units, each of which represents a contingent right to receive one share of the issuer's common stock, subject to the applicable vesting schedule and conditions of each restricted stock unit.

F3: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $12.00 to $12.01, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F4: The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $12.00 to $12.135, inclusive. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F5: These shares were sold at $12.00. The reporting person undertakes to provide to the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the shares sold.