AMPX (AMPX) insider report: 9,375 RSU shares to be sold, recent 60,702-share sale

Rhea-AI Filing Summary

AMPX filed a Form 144 reporting an intended sale and recent dispositions of Common Stock. The filing lists 9,375 shares to be sold following a "Release of restricted stock units" on 05/20/2026. It also discloses 60,702 shares sold on 05/21/2026 for $897,685.46.

Insights

Securities Compliance Analyst

Routine Rule 144 disposition and recent sales are disclosed; no extraordinary items shown.

The filing lists an intended sale of 9,375 shares tied to a "Release of restricted stock units" on 05/20/2026. That phrasing indicates compensation-related shares becoming transferable rather than an open-market purchase.

Separately, the excerpt shows 60,702 shares sold on 05/21/2026 with proceeds $897,685.46. Cash-flow treatment and any broker-dealer involvement are stated as issuer/compensation in the excerpt; further transaction mechanics are not provided in this excerpt.

Key Figures

Shares to be sold: 9,375 shares Shares sold in past 3 months: 60,702 shares Proceeds reported: $897,685.46

3 metrics

Shares to be sold 9,375 shares Release of restricted stock units on <date>05/20/2026</date>

Shares sold in past 3 months 60,702 shares Sale dated <date>05/21/2026</date>

Proceeds reported $897,685.46 Proceeds associated with the 60,702-share sale on <date>05/21/2026</date>

Key Terms

restricted stock units, Form 144, compensation

3 terms

restricted stock units financial

"Release of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

compensation financial

"05/20/2026 | Release of restricted stock units | Issuer | 9375 | 05/20/2026 | Compensation"

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 1 New York Plaza, 38th fl. New York NY 10004	4375	75221.56	145444412	05/27/2026	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	05/20/2026	Release of restricted stock units	Issuer			9375	05/20/2026	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
Thomas M. Stepien 1180 Page Ave. Fremont CA 94538	Common Stock	05/21/2026	60702	897685.46

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 AMPX's Form 144 disclose about the upcoming sale?

The Form 144 reports an intended sale of 9,375 shares following a "Release of restricted stock units" dated 05/20/2026. The entry ties the shares to compensation-related release rather than an external purchase.

How many AMPX shares were sold in the past three months per this filing?

The excerpt shows 60,702 shares of Common Stock sold on 05/21/2026. The filing records proceeds of $897,685.46 for those dispositions as presented in the excerpt.

Who is the reporting party in the Form 144 excerpt for AMPX?

The excerpt names Thomas M. Stepien with an address in Fremont, CA, associated with Common Stock sales on 05/21/2026. Morgan Stanley Smith Barney LLC appears as a broker/dealer address on the form.

Are the shares to be sold from AMPX listed as compensation-related?

Yes. The filing line for the 9,375 shares is labeled "Release of restricted stock units" and lists the method as Compensation, indicating the shares became transferable due to vesting or release events.