Director Steven Chu sells 322,197 Amprius (AMPX) shares after exercising options

Rhea-AI Filing Summary

Amprius Technologies director Steven Chu reported a combination of option exercises and share sales. On March 10 and 12, 2026, he exercised stock options covering 259,697 shares of common stock at exercise prices of $0.62 and $2.61 per share.

Over the same two days, he sold 322,197 shares of common stock in open-market transactions at average prices reported between $17.90 and $18.78 per share. Following these transactions, Chu directly holds 127,339 shares of Amprius common stock, including 44,444 restricted stock units that will settle in shares if vesting conditions are met.

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

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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^*

Chu Steven

(Last) (First) (Middle)

C/O AMPRIUS TECHNOLOGIES, INC.,

1180 PAGE AVENUE

(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
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/10/2026

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	03/10/2026		M		104,132	A	$0.62	293,971(1)	D
Common stock	03/10/2026		S		166,632	D	$17.9163(2)	127,339(1)	D
Common stock	03/12/2026		M		86,143	A	$2.61	213,482(1)	D
Common stock	03/12/2026		M		69,422	A	$0.62	282,904(1)	D
Common stock	03/12/2026		S		100,000	D	$18.6467(3)	182,904(1)	D
Common stock	03/12/2026		S		50,000	D	$18.2148(4)	132,904(1)	D
Common stock	03/12/2026		S		5,565	D	$18.5346(5)	127,339(1)	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
Stock Option (right to buy)	$0.62	03/10/2026		M			104,132	10/23/2024	12/12/2027	Common stock	104,132	$0.62	69,422	D
Stock Option (right to buy)	$2.61	03/12/2026		M			86,143	09/14/2022	04/13/2032	Common stock	86,143	$2.61	184,108	D
Stock Option (right to buy)	$0.62	03/12/2026		M			69,422	10/23/2024	12/12/2027	Common stock	69,422	$0.62	0	D

Explanation of Responses:

1. Includes 44,444 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.

2. The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $17.90 to $18.00, 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.

3. The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $18.60 to $18.78, 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.

4. The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $18.20 to $18.26, 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.

5. The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $18.50 to $18.61, 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.

Remarks:

Exhibit 24-Power of Attorney

	/s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Steven Chu	03/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transactions did Steven Chu report for Amprius Technologies (AMPX)?

Steven Chu reported exercising stock options and selling common shares of Amprius Technologies (AMPX). He exercised options for 259,697 shares, then sold 322,197 shares in open-market transactions over March 10 and 12, 2026, as disclosed in the Form 4 filing.

How many Amprius (AMPX) shares did Steven Chu sell in this Form 4?

Steven Chu sold 322,197 shares of Amprius common stock. These sales were executed in multiple open-market transactions at average prices reported between $17.90 and $18.78 per share, according to the detailed price ranges included in the filing footnotes.

How many Amprius (AMPX) stock options did Steven Chu exercise?

Steven Chu exercised options covering 259,697 shares of Amprius common stock. The options had exercise prices of $0.62 and $2.61 per share, and the exercises occurred on March 10 and 12, 2026, as reflected in the derivative transaction entries.

What is Steven Chu’s remaining Amprius (AMPX) share ownership after these transactions?

After the reported transactions, Steven Chu directly owns 127,339 shares of Amprius common stock. This total includes 44,444 restricted stock units, each representing a contingent right to receive one share upon satisfaction of applicable vesting conditions described in the filing.

At what prices did Steven Chu’s Amprius (AMPX) share sales occur?

The filing reports average execution prices between $17.90 and $18.78 per share. Footnotes explain that shares were sold in multiple transactions within narrow ranges, and full price breakdowns are available upon request from the issuer or the reporting person.

Do Steven Chu’s holdings include restricted stock units of Amprius (AMPX)?

Yes. Steven Chu’s reported direct holdings include 44,444 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Amprius common stock, subject to the specific vesting schedules and conditions outlined for those awards.