Nasdaq approves SEALSQ transfer to Global Select; LAES unchanged

Rhea-AI Filing Summary

SEALSQ Corp said Nasdaq approved its application to transfer its listing from the Nasdaq Capital Market to the Nasdaq Global Select Market. The company’s ordinary shares will begin trading on the Global Select Market at the opening on October 27, 2025, continuing under the ticker LAES.

The report incorporates this information by reference into SEALSQ’s registration statements on Form F-3 (File No. 333-290963) and Form S-8 (File No. 333-287139), including the base prospectus and any outstanding prospectus supplements.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 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 October 2025

Commission File Number: 001-41709

SEALSQ CORP

(Exact Name of Registrant as Specified in Charter)

N/A

(Translation of Registrant’s name into English)

British Virgin Islands	Avenue Louis-Casaï 58 1216 Cointrin, Switzerland	Not Applicable
(State or other jurisdiction of incorporation or organization)	(Address of principal executive office)	(I.R.S. Employer Identification No.)

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

☒ Form 20-F         ☐ Form 40-F

On October 23, 2025, SEALSQ Corp (the “Company”) received a written notice from the Nasdaq Stock Market (“Nasdaq”) indicating that the Company’s application to transfer its listing venue from The Nasdaq Capital Market to The Nasdaq Global Select Market for its ordinary shares had been approved. The Company’s ordinary shares will commence trading on The Nasdaq Global Select Market at the opening of business on October 27, 2025. The Company’s ordinary shares will continue to trade under the ticker symbol “LAES” following the transfer.

The information contained in this Report on Form 6-K is hereby incorporated by reference into the registration statement on Form F-3 of the Company (File No. 333- 290963), as amended, and the registration statement on Form S-8 of the Company (File No. 333-287139), and into the base prospectus and any prospectus supplement outstanding under each of the foregoing registration statements, to the extent not superseded by documents or reports subsequently filed or furnished by the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934.

SIGNATURES

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.

Date: October 24, 2025	SEALSQ CORP
	By:	/s/ Carlos Moreira
		Name: Carlos Moreira
		Title:   Chief Executive Officer
	By:	/s/ John O’Hara
		Name: John O’Hara
		Title:   Chief Financial Officer

FAQ

When will SEALSQ (LAES) start trading on the Nasdaq Global Select Market?

Trading begins at the opening of business on October 27, 2025.

What market is SEALSQ moving from?

SEALSQ is transferring from the Nasdaq Capital Market to the Nasdaq Global Select Market.

Will SEALSQ’s ticker change after the transfer?

No. The company’s ordinary shares will continue to trade under the ticker LAES.

What did Nasdaq approve for SEALSQ (LAES)?

Nasdaq approved SEALSQ’s application to transfer its listing to the Nasdaq Global Select Market.

Does this 6-K affect SEALSQ’s registration statements?

Yes. The information is incorporated by reference into SEALSQ’s Form F-3 (333-290963) and Form S-8 (333-287139) registration statements.

Where will SEALSQ’s ordinary shares trade after the change?

On the Nasdaq Global Select Market beginning October 27, 2025.