[144] Silicon Motion Technology Corporation SEC Filing

Rhea-AI Filing Summary

Silicon Motion (SIMO) Form 144: planned sale of ADS The filer has notified an intended sale of 6,000 ADS with an aggregate market value of $458,280, to be offered approximately on 08/12/2025 on the NASDAQ GS. The filing shows 35,150,000 shares outstanding, indicating the proposed sale is a small portion of the capital base. The securities being sold were originally acquired as restricted stock awards from Silicon Motion Technology on 02/08/2019 (1,000 ADS), 02/10/2020 (2,500 ADS) and 02/05/2021 (2,500 ADS). The filer sold 2,000 ADS on 06/20/2025 for $143,565. The notice includes the filer’s representation that they are not aware of undisclosed material adverse information about the issuer.

Positive

• Transparent disclosure of a planned sale of 6,000 ADS with aggregate value $458,280
• Acquisition history provided: restricted stock awards dated 02/08/2019, 02/10/2020 and 02/05/2021

Negative

• Administrative details missing: filer CIK and some issuer identification fields are not populated in the form content
• Issuer address and SEC file number fields are blank in the provided content, reducing standalone traceability

Insights

Securities Analyst

TL;DR: A small, routine insider sale of 6,000 ADS (~$458k) is disclosed; unlikely to be materially market-moving.

The transaction size is modest relative to the 35,150,000 shares outstanding, representing approximately 0.017% of outstanding shares, so the direct dilution or supply impact is negligible. The ADS to be sold were acquired as restricted stock awards across 2019–2021, which suggests these are vested equity compensation shares rather than newly issued shares. A recent dispositional event shows 2,000 ADS were sold for $143,565 on 06/20/2025, indicating some prior monetization activity. Overall, this filing appears procedural and compliant with Rule 144 disclosure requirements.

Corporate Governance Expert

TL;DR: Disclosure aligns with compliance norms; limited governance signal due to small sale size and award origins.

The seller disclosed the origin of the ADS as restricted stock awards, which provides helpful context about executive/insider compensation and vesting history. The filer’s representation that they do not possess undisclosed material adverse information is standard but important for Rule 144 notices. Missing administrative fields (e.g., some filer/issuer administrative identifiers) reduce transparency but do not negate the substantive sales detail. Given the small scale of the sale, this filing is more a compliance disclosure than a governance red flag.

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
ADS	Pershing LLC One Pershing Plaza Jersey City NJ 07399	6000	458280.00	35150000	08/12/2025	NASDAQ GS

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 *
ADS	02/08/2019	Restricted Stock Award	Silicon Motion Technology			1000	02/08/2019	Equity Compensation
ADS	02/10/2020	Restricted Stock Award	Silicon Motion Technology			2500	02/10/2020	Equity Compensation
ADS	02/05/2021	Restricted Stock Award	Silicon Motion Technology			2500	02/05/2021	Equity 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
HAN-PING SHIEH 24F., NO. 153, WENSHIN RD. HSINCHU COUNTY CHUPEI CITY F5 302	Silicon Motion Technology	06/20/2025	2000	143565.00

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 the Form 144 for Silicon Motion (SIMO) disclose?

The form discloses an intended sale of 6,000 ADS valued at $458,280, to be offered around 08/12/2025 on NASDAQ GS.

Who is the seller named in the filing for SIMO?

The seller listed in the filing is HAN-PING SHIEH with an address shown in the document.

What is the origin of the ADS being sold in the SIMO Form 144?

The ADS were acquired as restricted stock awards from Silicon Motion Technology on 02/08/2019 (1,000), 02/10/2020 (2,500), and 02/05/2021 (2,500).

Has the filer sold any SIMO ADS recently?

Yes. The filing reports sale of 2,000 ADS on 06/20/2025 with gross proceeds of $143,565.

Does the filing indicate undisclosed material adverse information about SIMO?

The filer represents they do not know any material adverse information about the issuer that has not been publicly disclosed.