SEALSQ Corp files 6-K with half-year report

SEALSQ Corp, a foreign private issuer based in the British Virgin Islands with principal offices in Switzerland, submitted a Form 6-K for September 2025.

Rhea-AI Filing Summary

SEALSQ Corp, a foreign private issuer based in the British Virgin Islands with principal offices in Switzerland, submitted a Form 6-K for September 2025. The filing furnishes three key exhibits: a press release dated September 9, 2025, a Half Year Report including Management’s Discussion and Analysis of financial condition and results of operations, and condensed consolidated financial statements as at June 30, 2025. The company also states that most of the information in the Half Year Report and all of the condensed consolidated financial statements are incorporated by reference into its existing Form F-3 and Form S-8 registration statements, as well as their related base prospectuses and any outstanding prospectus supplements.

FAQ

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What does SEALSQ Corp (LAES) report in this Form 6-K?

SEALSQ Corp furnishes a press release, a Half Year Report with Management’s Discussion and Analysis, and condensed consolidated financial statements as at June 30, 2025, as part of its Form 6-K for September 2025.

Which financial period is covered by SEALSQ Corp’s Half Year Report in this filing?

The Half Year Report of SEALSQ Corp, included as Exhibit 99.2, covers the half-year period and includes Management’s Discussion and Analysis of Financial Condition and Results of Operations, aligned with financial information as at June 30, 2025.

What financial statements does SEALSQ Corp include in this 6-K?

SEALSQ Corp includes condensed consolidated financial statements as at June 30, 2025, which are provided as Exhibit 99.3 to the Form 6-K.

How are the exhibits in this SEALSQ Corp (LAES) Form 6-K used in existing registration statements?

The company incorporates most of the information in Exhibit 99.2 and all of Exhibit 99.3 by reference into its Form F-3 (File No. 333-286098) and Form S-8 (File No. 333-287139), and into the related base prospectuses and any outstanding prospectus supplements, to the extent not superseded by later filings.

Who signed SEALSQ Corp’s September 2025 Form 6-K?

The Form 6-K was signed on behalf of SEALSQ Corp by Carlos Moreira, Chief Executive Officer, and John O’Hara, Chief Financial Officer, dated September 9, 2025.

What is Exhibit 99.1 in SEALSQ Corp’s September 2025 Form 6-K?

Exhibit 99.1 is a press release issued by SEALSQ Corp on September 9, 2025.

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Accepted by SEC EDGAR 09/09/2025 - 04:58 PM Learn about SEC filing dates

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 September 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

The information contained in Exhibit 99.2 to this Report on Form 6-K, except for Sections 1.1, 1.2, 2.2.3, 2.2.4, 2.3.1, and 2.4, is hereby incorporated by reference into the registration statement on Form F-3 of the Company (File No. 333-286098), 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.

The information contained in Exhibit 99.3 to this Report on Form 6-K is hereby incorporated by reference into the registration statement on Form F-3 of the Company (File No. 333-286098), 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.

Exhibit No.		Description
99.1		Press release issued on September 9, 2025.
99.2		Half Year Report of SEALSQ Corp including Management’s Discussion and Analysis of Financial Condition and Results of Operations, issued on September 9, 2025.
99.3		Condensed Consolidated Financial Statements of SEALSQ Corp as at June 30, 2025.

2

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: September 9, 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