AMPX Form 144: RSU release and January 2026 10b5-1 sales

AMPX submitted a Form 144 notice disclosing proposed and completed transactions in its common stock.

Rhea-AI Filing Summary

AMPX submitted a Form 144 notice disclosing proposed and completed transactions in its common stock. The filing records a release of restricted stock units of 126,191 shares on 02/20/2026. The excerpt also lists 10b5-1 sales attributed to KANG SUN: 506,267 shares on 01/12/2026 for $5,111,474.14, 950,548 shares on 01/16/2026 for $10,518,669.11, and 43,185 shares on 01/20/2026 for $476,274.41.

FAQ

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

What does AMPX's Form 144 disclose?

The filing discloses proposed and completed sales and a release of restricted stock units. It lists a release of 126,191 RSUs on 02/20/2026 and three completed 10b5-1 sales by KANG SUN in January 2026 with share counts and proceeds.

How many shares were released from RSUs for AMPX?

The document reports a release of 126,191 restricted stock units on 02/20/2026. This line is labeled in the excerpt as a release of restricted stock units and tied to a compensation event.

What 10b5-1 sales are shown in the AMPX excerpt?

The excerpt shows three 10b5-1 sales by KANG SUN: 506,267 shares on 01/12/2026, 950,548 shares on 01/16/2026, and 43,185 shares on 01/20/2026, each with corresponding proceeds listed.

Who is listed as the broker or filer on the Form 144 excerpt?

The excerpt lists Morgan Stanley Smith Barney LLC with an address at 1 New York Plaza, 38th fl., New York, NY 10004 as the securities intermediary shown in the filing metadata.

What proceeds were reported for the January 2026 10b5-1 sales?

The excerpt reports proceeds for the January sales: $5,111,474.14 for 506,267 shares on 01/12/2026, $10,518,669.11 for 950,548 shares on 01/16/2026, and $476,274.41 for 43,185 shares on 01/20/2026.

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

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Accepted by SEC EDGAR 02/24/2026 - 05:08 PM EST Learn about SEC filing dates

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	0001476220
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	AMPRIUS TECHNOLOGIES INC
SEC File Number	001-41314
Address of Issuer	1180 Page Avenue Fremont CALIFORNIA 94538
Phone	8004258803
Name of Person for Whose Account the Securities are To Be Sold	KANG SUN
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	Director

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	61251	622034.53	136650964	02/23/2026	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	02/20/2026	Release of restricted stock units	Issuer			126191	02/20/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for KANG SUN 1180 Page Ave. Fremont CA 94538	Common	01/12/2026	506267	5111474.14
10b5-1 Sales for KANG SUN 1180 Page Ave. Fremont CA 94538	Common	01/16/2026	950548	10518669.11
10b5-1 Sales for KANG SUN 1180 Page Ave. Fremont CA 94538	Common	01/20/2026	43185	476274.41

144: Remarks and Signature

Remarks	SHARES TO BE SOLD TO COVER WITHHOLDING TAXES UPON VESTING OF RESTRICTED STOCK UNIT AWARDS
Date of Notice	02/24/2026
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	/s/ Kang Sun
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)