AMPX (AMPX) investor files Rule 144 to sell 506,267 shares

Rhea-AI Filing Summary

A holder of AMPX common stock has filed a notice of proposed sale under Rule 144 after exercising stock options. The filer plans to sell 506,267 common shares through Morgan Stanley Smith Barney LLC on the NYSE, with an indicated aggregate market value of 4,799,411.16. The approximate sale date is 01/12/2026, and the shares were acquired the same day by cash exercise of stock options from the issuer.

The notice also reports prior sales of the issuer’s common stock during the past three months by the same seller. These include 68,655 shares sold on 11/21/2025 for gross proceeds of 692,131.65, and 1,000,000 shares sold on 11/17/2025 under a Rule 10b5-1 trading plan for gross proceeds of 10,595,300.00. The filing represents that the seller is not aware of undisclosed material adverse information about the issuer.

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	506267	4799411.16	130483838	01/12/2026	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	01/12/2026	Exercise of Stock Options	Issuer			506267	01/12/2026	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
KANG SUN 1180 Page Avenue Fremont CA 94538	Common	11/21/2025	68655	692131.65
10b5-1 Sales for KANG SUN 1180 Page Avenue Fremont CA 94538	Common	11/17/2025	1000000	10595300.00

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 Rule 144 notice disclose about upcoming share sales?

The notice states that a holder of AMPX common stock intends to sell 506,267 shares on or about 01/12/2026 through Morgan Stanley Smith Barney LLC on the NYSE, with an aggregate market value of 4,799,411.16.

How were the AMPX shares in the planned Rule 144 sale acquired?

The 506,267 AMPX common shares were acquired on 01/12/2026 by exercise of stock options from the issuer, with the purchase price paid in cash.

What prior AMPX stock sales in the last 3 months are reported in the filing?

The filing lists two prior transactions: 68,655 common shares sold on 11/21/2025 for gross proceeds of 692,131.65, and 1,000,000 common shares sold on 11/17/2025 under a Rule 10b5-1 plan for gross proceeds of 10,595,300.00.

Who is identified as the seller in the recent AMPX Rule 144 filing?

The table of recent sales identifies KANG SUN, 1180 Page Avenue, Fremont, CA 94538 as the seller of AMPX common stock during the past three months.

What is the reported number of AMPX shares outstanding in this Rule 144 notice?

The securities information section lists 130,483,838 AMPX common shares as the number of shares or other units outstanding.

What representation does the AMPX seller make about nonpublic information?

By signing the notice, the seller represents that they do not know any material adverse information about the issuer’s current or prospective operations that has not been publicly disclosed.

Is a trading plan referenced in the AMPX stock sale history?

Yes. The past three months’ sales table notes 10b5-1 sales for the 11/17/2025 transaction, indicating those sales were made under a written Rule 10b5-1 trading plan.