Amprius Technologies (AMPX) CEO awarded 150,000 stock units

Rhea-AI Filing Summary

Amprius Technologies, Inc. reported that Chief Executive Officer Thomas M. Stepien acquired 150,000 shares of common stock in the form of restricted stock units on March 4, 2026, at a price of $0.00 per share.

Each restricted stock unit represents the right to receive one share of common stock. According to the vesting schedule, 1/16 of the shares subject to the award will vest on May 20, 2026 and then quarterly on each August 20, November 20, February 20 and May 20, subject to his continued service, until the award is fully vested on February 20, 2030.

Following this grant, Stepien directly holds a total of 760,000 shares of common stock, which includes 750,000 restricted stock units that each represent a contingent right to receive one share, subject to their applicable vesting schedules and conditions.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Stepien Thomas M

(Last) (First) (Middle)

1180 PAGE AVE.

(Street)

FREMONT CA 94538

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Amprius Technologies, Inc. [ AMPX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/04/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common stock	03/04/2026		A		150,000(1)	A	$0	760,000(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of the issuer's common stock. 1/16th of shares subject to award will vest on May 20, 2026 and quarterly thereafter on each August 20, November 20, February 20 and May 20, subject to the reporting person's continued service on each such date, until the award is fully vested on February 20, 2030.

2. Includes 750,000 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:

	/s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Thomas M Stepien	03/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Amprius Technologies (AMPX) report for Thomas M. Stepien?

Amprius Technologies reported that CEO Thomas M. Stepien received a grant of 150,000 restricted stock units of common stock. The award was recorded at a price of $0.00 per share and represents equity-based compensation rather than an open-market purchase or sale.

How do the new restricted stock units for AMPX’s CEO vest over time?

The 150,000 restricted stock units vest gradually. One-sixteenth of the shares will vest on May 20, 2026, and additional portions will vest quarterly on August 20, November 20, February 20 and May 20, until the award is fully vested on February 20, 2030, subject to continued service.

What does each restricted stock unit granted to the AMPX CEO represent?

Each restricted stock unit granted to the Amprius CEO represents the right to receive one share of Amprius Technologies’ common stock. These units convert into actual shares only as they vest, following the detailed schedule and conditions tied to the executive’s continued service with the company.

How many Amprius Technologies shares does Thomas M. Stepien hold after this Form 4 transaction?

After this transaction, Thomas M. Stepien directly holds 760,000 shares of Amprius Technologies common stock. This total includes 750,000 restricted stock units, each representing a contingent right to receive one share of common stock, subject to their respective vesting schedules and conditions.

Is the AMPX CEO’s 150,000-share award a cash purchase or equity compensation?

The 150,000-share award to the AMPX CEO is equity compensation in the form of restricted stock units, recorded at $0.00 per share. It does not involve a cash purchase but instead grants the right to receive common shares as vesting conditions are satisfied over time.