Was Sun Kang’s Amprius (AMPX) share sale a discretionary trade?

No. A footnote states the transaction was mandated by the issuer as a non-discretionary, sell-to-cover arrangement. The sale funded tax withholding obligations related to the vesting of restricted stock units rather than a voluntary portfolio decision.

Tax-related share sale by Amprius (NYSE: AMPX) director Kang

Q: What insider transaction did Amprius (AMPX) director Sun Kang report?

Amprius director Sun Kang reported selling 61,251 shares of common stock. The shares were sold on February 23, 2026 as part of a non-discretionary, sell-to-cover arrangement to fund tax withholding on vested restricted stock units.

Q: At what price did Sun Kang sell Amprius (AMPX) shares on February 23, 2026?

The filing reports an average execution price of $10.1555 per share . A footnote explains that the 61,251 shares were sold in multiple transactions at prices ranging from $9.96 to $10.35 , with full trade details available upon request.

Q: How many Amprius (AMPX) shares does Sun Kang own after this transaction?

After the sale, Sun Kang directly owns 1,342,400 shares of Amprius common stock, including 1,159,385 restricted stock units . The filing also reports 274,275 shares held indirectly through the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST.

Q: How are Sun Kang’s indirect Amprius (AMPX) holdings structured?

The filing shows 274,275 shares held indirectly through the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST . A footnote explains that Sun Kang and his spouse act as co-trustees of this trust, which holds Amprius common stock.

Q: What are the key restricted stock unit details in Sun Kang’s Amprius (AMPX) holdings?

The filing notes that Kang’s direct holdings include 1,159,385 restricted stock units . Each restricted stock unit represents a contingent right to receive one share of Amprius common stock, subject to the applicable vesting schedules and conditions.

Filing Impact

(High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Amprius Technologies director Sun Kang sold 61,251 shares of common stock on February 23, 2026 at an average price of $10.1555. According to the filing, this was a non-discretionary, sell-to-cover transaction mandated by the company to fund tax withholding on vesting restricted stock units.

After this sale, Kang directly holds 1,342,400 shares of Amprius common stock, which includes 1,159,385 restricted stock units. He also has indirect ownership of 274,275 shares through the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST, where he and his spouse serve as co-trustees.

Insider Trade Summary

Net Seller: 61,251 shares ($622,035)

Net Sell 2 txns

Insider Sun Kang

Role Director

Sold 61,251 shs ($622K)

Type	Security	Shares	Price	Value
Sale	Common stock	61,251	$10.1555	$622K
holding	Common stock	--	--	--

Holdings After Transaction: Common stock — 1,342,400 shares (Direct); Common stock — 274,275 shares (Indirect, See Footnote)

Footnotes (1)

This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units. The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $9.96 to $10.35, 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. Includes 1,159,385 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. These securities are held directly by the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST, for which the reporting person and his spouse are co-trustees.

Form 4 Insider Transactions: What Each Field Means →

02/24/2026 - 05:11 PM

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^*

Sun Kang

(Last)

(First)

(Middle)

C/O AMPRIUS TECHNOLOGIES, INC.,

1180 PAGE AVENUE

(Street)

FREMONT

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)
02/23/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common stock	02/23/2026		S⁽¹⁾		61,251	D	$10.1555⁽²⁾	1,342,400⁽³⁾	D
Common stock								274,275	I	See Footnote⁽⁴⁾

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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. This transaction was effected pursuant to non-discretionary, sell-to-cover arrangements mandated by the issuer to fund tax withholding obligations in connection with the vesting of restricted stock units.

2. The price reported in Column 4 is an average execution price. These shares were sold in multiple transactions at prices ranging from $9.96 to $10.35, 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. Includes 1,159,385 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.

4. These securities are held directly by the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST, for which the reporting person and his spouse are co-trustees.

Remarks:

	/s/ Ricardo C. Rodriguez, attorney-in-fact on behalf of Kang Sun	02/24/2026
	** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Amprius (AMPX) director Sun Kang report?

Amprius director Sun Kang reported selling 61,251 shares of common stock. The shares were sold on February 23, 2026 as part of a non-discretionary, sell-to-cover arrangement to fund tax withholding on vested restricted stock units.

At what price did Sun Kang sell Amprius (AMPX) shares on February 23, 2026?

The filing reports an average execution price of $10.1555 per share. A footnote explains that the 61,251 shares were sold in multiple transactions at prices ranging from $9.96 to $10.35, with full trade details available upon request.

How many Amprius (AMPX) shares does Sun Kang own after this transaction?

After the sale, Sun Kang directly owns 1,342,400 shares of Amprius common stock, including 1,159,385 restricted stock units. The filing also reports 274,275 shares held indirectly through the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST.

How are Sun Kang’s indirect Amprius (AMPX) holdings structured?

The filing shows 274,275 shares held indirectly through the KANG & CECILLIA SUN FAMILY REVOCABLE TRUST. A footnote explains that Sun Kang and his spouse act as co-trustees of this trust, which holds Amprius common stock.

What are the key restricted stock unit details in Sun Kang’s Amprius (AMPX) holdings?

The filing notes that Kang’s direct holdings include 1,159,385 restricted stock units. Each restricted stock unit represents a contingent right to receive one share of Amprius common stock, subject to the applicable vesting schedules and conditions.