Amprius director granted 10,423 RSUs

SATTERTHWAITE LIVINGSTON reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

SATTERTHWAITE LIVINGSTON reported acquisition or exercise transactions in this Form 4 filing.

Amprius Technologies director Livingston Satterthwaite received an equity award in the form of restricted stock units. The Form 4 reports a grant of 10,423 restricted stock units, each representing one share of common stock at no cash cost per unit. All of these units vest 100% on the earlier of the one-year anniversary of the grant date or the day before the next annual meeting of stockholders, if he continues to serve through that date. Following this grant, he is reported as beneficially owning 346,506 shares in total, including 199,102 restricted stock units that remain subject to their respective vesting conditions.

Insider Trade Summary

Grant/Award: 10,423 shares

Grant/Award 1 txn

Insider SATTERTHWAITE LIVINGSTON

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common stock	10,423	$0.00	$0.00

Holdings After Transaction: Common stock — 346,506 shares (Direct)

Footnotes (2)

1. F1. The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share of issuer's common stock. 100% of the restricted stock units vest on the earlier of (i) the one-year anniversary of the date the restricted stock units were granted and (ii) the day before the next annual meeting of stockholders, subject to the reporting person's continued service as of the vesting date.
2. F2. Includes 199,102 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.

Key Figures

RSU grant size: 10,423 restricted stock units Post-transaction holdings: 346,506 shares Unvested RSUs included: 199,102 restricted stock units +1 more

4 metrics

RSU grant size 10,423 restricted stock units Award to director on 2026-06-12

Post-transaction holdings 346,506 shares Total beneficial ownership after grant

Unvested RSUs included 199,102 restricted stock units Contingent rights to common shares, subject to vesting

Grant price $0.0000 per share Equity compensation, no cash paid for RSUs

Key Terms

restricted stock units, vesting, annual meeting of stockholders

3 terms

restricted stock units financial

"The securities are represented by restricted stock units. Each restricted stock unit represents the reporting person's right to receive one share"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

vesting financial

"100% of the restricted stock units vest on the earlier of the one-year anniversary or the day before the next annual meeting of stockholders"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

annual meeting of stockholders financial

"vest on the earlier of the one-year anniversary of the date granted and the day before the next annual meeting of stockholders"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Amprius Technologies (AMPX) report for Livingston Satterthwaite?

Amprius Technologies reported that director Livingston Satterthwaite received a grant of 10,423 restricted stock units. Each unit represents one share of common stock, awarded at no cash cost, as part of his equity compensation arrangements.

How many Amprius Technologies (AMPX) shares does Satterthwaite hold after this Form 4 filing?

After the reported grant, Satterthwaite is shown as beneficially owning 346,506 shares of Amprius Technologies common stock. This total includes already-held shares plus restricted stock units that are subject to vesting schedules and conditions described in the filing’s footnotes.

What are the vesting terms of the new Amprius Technologies (AMPX) restricted stock units?

The 10,423 restricted stock units vest 100% on the earlier of the one-year anniversary of the grant date or the day before the next annual meeting of stockholders. Vesting requires Satterthwaite’s continued service with Amprius Technologies through the applicable vesting date.

How many unvested restricted stock units does Satterthwaite now have in Amprius Technologies (AMPX)?

The footnotes state that his holdings include 199,102 restricted stock units. Each unit represents a contingent right to receive one share of common stock, subject to the specific vesting schedules and conditions that apply to each individual restricted stock unit grant.

Was this Amprius Technologies (AMPX) insider transaction an open-market purchase or a compensation grant?

The filing labels the transaction with code “A,” indicating a grant or award acquisition rather than an open-market purchase. The reported price per share is zero, confirming it as equity compensation in the form of restricted stock units granted by the company.

Does the Amprius Technologies (AMPX) Form 4 mention any derivative securities for Satterthwaite?

The derivative section of the filing shows no remaining derivative positions for Satterthwaite. The disclosure instead focuses on common stock and restricted stock units, which provide rights to receive shares upon satisfaction of specified vesting conditions.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/16/2026 - 06:01 PM EDT Learn about SEC filing dates

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^*

SATTERTHWAITE LIVINGSTON

(Last) (First) (Middle)

C/O 1180 PAGE AVE.

(Street)

FREMONT CALIFORNIA 94538

(City) (State) (Zip)

UNITED STATES

(Country)

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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/12/2026

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

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

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

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	06/12/2026		A		10,423(1)	A	$0	346,506(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 issuer's common stock. 100% of the restricted stock units vest on the earlier of (i) the one-year anniversary of the date the restricted stock units were granted and (ii) the day before the next annual meeting of stockholders, subject to the reporting person's continued service as of the vesting date.

2. Includes 199,102 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

	/s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Livingston Satterthwaite	06/16/2026
	** 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.
* Form 4: SEC 1474 (03-26)