Shareholder files AMPX Form 144 to sell 1M NYSE-traded shares

Rhea-AI Filing Summary

A shareholder of AMPX filed a Form 144 notice to sell 1,000,000 shares of common stock through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of $11,290,000. The table shows 130,483,838 shares of common stock outstanding. The shares to be sold were acquired on 11/17/2025 by exercising stock options for cash on the same date.

Over the past three months, an individual named Kang Sun sold 65,654 common shares for gross proceeds of $447,510.79. The signer represents that they are not aware of undisclosed material adverse information about AMPX’s current or prospective operations at the time of this planned sale.

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

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 Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	1000000	11290000.00	130483838	11/17/2025	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	11/17/2025	Exercise of Stock Options	Issuer			1000000	11/17/2025	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
KANG SUN 1180 Page Avenue Fremont CA 94538	Common	08/21/2025	65654	447510.79

144: Remarks and Signature

Remarks

Date of Notice

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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 the AMPX Form 144 filing disclose?

The Form 144 filing for AMPX discloses a shareholder’s intention to sell 1,000,000 shares of AMPX common stock, with an indicated aggregate market value of $11,290,000, on the NYSE.

How many AMPX shares are planned to be sold and through which broker?

The notice covers the proposed sale of 1,000,000 shares of AMPX common stock through Morgan Stanley Smith Barney LLC, Executive Financial Services, using the NYSE as the trading venue.

How were the AMPX shares in this Form 144 acquired?

The shares covered by this Form 144 were acquired as AMPX common stock on 11/17/2025 via an exercise of stock options from the issuer, with the purchase price paid in cash on the same date.

How many AMPX shares are reported outstanding in the Form 144?

The filing reports 130,483,838 AMPX common shares as the number of shares outstanding in the securities information table.

What AMPX stock sales occurred in the last three months by the reporting person?

During the past three months, Kang Sun, listed with an address in Fremont, CA, sold 65,654 AMPX common shares on 08/21/2025 for $447,510.79 in gross proceeds.

What representation does the seller make in the AMPX Form 144?

The seller represents that they do not know any material adverse information about AMPX’s current or prospective operations that has not been publicly disclosed at the time of signing the notice.