AMPX Insider Notice: 28,390 Shares from RSU Release to Be Sold

Rhea-AI Filing Summary

Amprius Technologies (AMPX) filed a Form 144 notifying a proposed sale of 28,390 shares of common stock through Morgan Stanley Smith Barney on the NYSE, with an aggregate market value listed as 193,512. The shares were acquired on 08/20/2025 as a release of restricted stock units from the issuer and were granted as compensation. The filer reports 70,811 shares acquired in that release and shows 125,075,837 shares outstanding. No securities were reported sold by the filer in the past three months. The filing includes the standard signature representation that the filer is not aware of undisclosed material adverse information.

Positive

• Timely disclosure of proposed sale details including broker, sale date, and share counts
• Acquisition basis disclosed — shares resulted from a release of restricted stock units dated 08/20/2025
• No reported sales by the filer in the past three months, simplifying aggregation rules

Negative

• None.

Insights

Financial Analyst

TL;DR Routine insider sale notice following an RSU release; no prior sales reported in past three months.

This Form 144 documents a proposed sale of 28,390 common shares tendered to a broker, with acquisition tied to an issuer RSU release dated 08/20/2025 and compensation noted as the payment nature. The filing gives investors transparency about an insider-originated sale and confirms no aggregated sales by this person in the prior three months. The disclosure of shares outstanding (125,075,837) allows investors to contextualize the size of the proposed sale relative to the company’s float.

Corporate Governance Expert

TL;DR Standard compliance filing; includes required representations about material nonpublic information.

The notice appears to follow Rule 144 procedural requirements: it lists the broker, sale date (08/21/2025), class of securities, and the acquisition basis (release of restricted stock units). The filer affirms they do not possess undisclosed material adverse information and indicates no recent sales to aggregate, which supports compliance with insider trading and disclosure norms. This filing is procedural and does not itself indicate governance changes.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC 1 New York Plaza, 38th fl. New York NY 10004	28390	193512	125075837	08/21/2025	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	08/20/2025	Release of restricted stock units	Issuer			70811	08/20/2025	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does Amprius (AMPX) Form 144 disclose about the proposed sale?

The filing discloses a proposed sale of 28,390 common shares through Morgan Stanley Smith Barney on 08/21/2025 with an aggregate market value of 193,512.

How were the shares acquired that are being sold according to the Form 144?

The shares were acquired on 08/20/2025 as a release of restricted stock units and the payment nature is listed as compensation.

Does the filer report any sales of Amprius securities in the past three months?

No. The filing states Nothing to Report for securities sold during the past three months.

What is the total number of Amprius shares outstanding reported in the filing?

The filing lists 125,075,837 shares outstanding.

Which broker is handling the proposed sale in the Form 144?

The broker named is Morgan Stanley Smith Barney LLC, located at 1 New York Plaza, 38th fl. New York NY 10004.