192,727 Restricted Units; KANG SUN 10b5-1 Sales (AMPX)

Rhea-AI Filing Summary

AMPX notice of proposed sale: 192,727 shares of Common stock (listed as Restricted Stock Units) are presented for resale. The filing lists multiple 10b5-1 sales by KANG SUN, including sales of 950,548, 506,267, 61,251, and 43,185 shares on various dates in January–February 2026.

Transactions are reported as 10b5-1 plan sales; cash‑flow treatment and further qualifiers are those shown in the excerpt.

Insights

Securities Compliance Counsel

Form 144 lists resale of restricted units and multiple 10b5-1 sales by an insider.

The filing itemizes 192,727 shares tied to Restricted Stock Units and several executed 10b5-1 plan sales by KANG SUN, with transaction dates in 01/12/2026, 01/16/2026, 01/20/2026, and 02/23/2026.

These entries are procedural notices of planned or executed resale under Rule 144 and 10b5-1; timing and cash‑flow recipients follow the plan disclosures in the excerpt.

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

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	192727	3507631.40	137019004	03/23/2026	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	05/20/2024	Restricted Stock Units	Issuer			192727	05/20/2024	N/A

* 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	02/23/2026	61251	622034.53
10b5-1 Sales for KANG SUN 1180 Page Avenue Fremont CA 94538	Common	01/20/2026	43185	476274.41
10b5-1 Sales for KANG SUN 1180 Page Avenue Fremont CA 94538	Common	01/16/2026	950548	10518708.21
10b5-1 Sales for KANG SUN 1180 Page Avenue Fremont CA 94538	Common	01/12/2026	506267	5111474.14

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 disclose about shares for resale?

The filing discloses 192,727 shares of Common stock tied to Restricted Stock Units are presented for resale. It lists these securities with an issuer designation and the security type as Restricted Stock Units.

Who conducted the reported 10b5-1 sales in the AMPX excerpt?

The excerpt identifies KANG SUN as the seller conducting 10b5-1 plan sales. Multiple transactions by that name are recorded on specific dates in the filing.

What 10b5-1 sale volumes are shown in the AMPX filing?

The filing shows sales of 950,548, 506,267, 61,251, and 43,185 shares on various dates in January–February 2026. Each line pairs shares with a dollar amount in the excerpt.

Are the proceeds or recipients of the AMPX sales specified?

The excerpt pairs each sale with a dollar figure (e.g., $10,518,708.21 for 950,548 shares) shown next to each transaction. The filing lists Morgan Stanley Smith Barney LLC as a broker/dealer in the header.

Do the AMPX entries state whether sales were under a trading plan?

Yes. The transactions are labeled as 10b5-1 Sales for the named seller, indicating they were effected under a prearranged trading plan as shown in the excerpt.