Thomas M. Stepien - 19 Dec 2025 Form 4 Insider Report for Amprius Technologies, Inc. (AMPX)

Role
President, Director
Signature
/s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Thomas M Stepien
Issuer symbol
AMPX
Transactions as of
19 Dec 2025
Net transactions value
$0
Form type
4
Filing time
22 Dec 2025, 08:46:55 UTC
Previous filing
06 May 2025
Next filing
06 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Stepien Thomas M President, Director 1180 PAGE AVE., FREMONT /s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Thomas M Stepien 22 Dec 2025 0002067233

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMPX Common stock Award $0 +200,000 +49% $0.000000 610,000 19 Dec 2025 Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 The securities are represented by restricted stock units granted on December 19, 2025, with a vesting commencement date of January 1, 2026. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/4th of the restricted stock units subject to the award will vest on February 20, 2027 and the remainder will vest quarterly over three years thereafter, on each May 20, August 20, November 20 and February 20, subject to the reporting person's continued service on each such date, until the award is fully vested on February 20, 2030.
F2 Includes 600,000 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.

Remarks:

Exhibit 24-Power of Attorney