UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of November 2025

Commission File Number: 001-41965

Semilux International Ltd.

(Registrant’s Name)

4F., No. 32, Keya Rd., Daya Dist.

Central Taiwan Science Park

Taichung City 42881

Taiwan

(Address of Principal Executive Offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

Nasdaq Letter

On November 10, 2025, Semilux International Ltd. (the “Company”) received a letter from the Listing Qualifications staff of The Nasdaq Stock Market (“Nasdaq”) notifying the Company that based on the closing bid price of the Company for the period from September 26, 2025 to November 7, 2025, the Company no longer meets the continued listing requirement of Nasdaq under Nasdaq Listing Rules 5550(a)(2), to maintain a minimum bid price of $1 per share.

Pursuant to Nasdaq Listing Rule 5810(c)(3)(A), the Company has a compliance period of one hundred eighty (180) calendar days, or until May 11, 2026 (the “Compliance Period”), to regain compliance with Nasdaq’s minimum bid price requirement. If at any time during the Compliance Period, the closing bid price per share of the Company’s ordinary shares is at least $1.00 for a minimum of ten (10) consecutive business days, Nasdaq will provide the Company a written confirmation of compliance and this matter will be closed.

In the event that the Company does not regain compliance in the compliance period, the Company may be eligible for an additional 180 calendar days, should the Company meet the continued listing requirement for market value of publicly held shares and all other initial listing standards for The Nasdaq Capital Market, with the exception of the bid price requirement, and is able to provide written notice of its intention to cure the deficiency during the second compliance period, by effecting a reverse stock split, if necessary.

The Company is currently evaluating options to regain compliance and intends to timely regain compliance with Nasdaq’s continued listing requirement.

Attached as Exhibit 99.1 to this Report on Form 6-K is a copy of the press release of the Company, dated November 12, 2025

Financial Statements and Exhibits

Exhibits.

Number
99.1		Press Release dated November 12, 2025

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	Semilux International Ltd.

Date: November 12, 2025	By:	/s/ Yung-Peng Chang
	Name:	Yung-Peng Chang
	Title:	Chief Executive Officer

Semilux International Ltd. 6-K