AMPX Form 144: Insider sale notices for Common Stock

AMPX filed a Form 144 notice reporting proposed sales of Common Stock tied to option exercises on 03/12/2026.

Rhea-AI Filing Summary

AMPX filed a Form 144 notice reporting proposed sales of Common Stock tied to option exercises on 03/12/2026.

The notice lists proposed sales of 86,143 and 69,422 shares on 03/12/2026 associated with exercises under a registered plan. It also records a prior sale of 166,632 shares on 03/10/2026 by Steven Chu for $2,985,428.90.

Insights

Securities Compliance Analyst

Form 144 documents affiliate notices for proposed sales tied to option exercises.

The filing lists two proposed cash settlements from option exercises totaling 155,565 shares scheduled on 03/12/2026. It also discloses a prior reported sale of 166,632 shares on 03/10/2026 for $2,985,428.90.

These are regulatory notices; cash‑flow treatment and final distribution methods are described as exercises under a registered plan. Subsequent Form 4/Form 5 or broker reports would show completion details.

FAQ

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

What does AMPX's Form 144 report?

The filing reports proposed sales of Common Stock tied to option exercises on 03/12/2026, plus a prior sale of 166,632 shares on 03/10/2026 for $2,985,428.90 by Steven Chu.

How many shares are listed as proposed for sale on 03/12/2026?

The notice lists proposed sales of 86,143 and 69,422 Common shares on 03/12/2026, reflecting option exercises under a registered plan, for a combined 155,565 shares as shown in the excerpt.

Who sold shares prior to the Form 144 filing?

The excerpt shows Steven Chu sold 166,632 Common shares on 03/10/2026, with proceeds reported as $2,985,428.90 in the filing's "Securities Sold During The Past 3 Months" section.

Do the proposed sales indicate how proceeds will be used?

Proceeds use is not specified in the excerpt. The reported entries show the method as cash exercises under a registered plan, but the filing does not state any recipient or allocation of proceeds.

Will these proposed sales change AMPX's outstanding shares?

The excerpt does not provide a post-transaction outstanding share count. The filing lists proposed share amounts; any impact on outstanding shares would depend on subsequent issuer reporting and is not shown here.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 03/12/2026 - 05:11 PM EDT 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	0001296381
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	(800) 425-8803
Name of Person for Whose Account the Securities are To Be Sold	STEVEN CHU
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	Board Seat

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 Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	155565	2870174.25	137019004	03/12/2026	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	03/12/2026	Exercise of options under a registered plan	Issuer			86143	03/12/2026	Cash
Common	03/12/2026	Exercise of options under a registered plan	Issuer			69422	03/12/2026	Cash

* 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
STEVEN CHU 1180 Page Avenue Fremont CA 94538	Common	03/10/2026	166632	2985428.90

144: Remarks and Signature

Remarks
Date of Notice	03/12/2026
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/ Steven Chu
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)