SEALSQ (LAES) details Form 6-K on 9M 2025 metrics

Rhea-AI Filing Summary

SEALSQ Corp filed a Form 6-K as a foreign private issuer to report that on October 8, 2025 it announced its preliminary unaudited financial metrics for the nine-month period ended September 30, 2025.

The company states that the information in this report is incorporated by reference into its existing registration statements on Form F-3 (File No. 333-286098) and Form S-8 (File No. 333-287139), including the related base prospectuses and any outstanding prospectus supplements. The filing is signed on behalf of SEALSQ by Chief Executive Officer Carlos Moreira and Chief Financial Officer John O’Hara.

Form 6-K: How Foreign Companies Report to the SEC →

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 8, 2025, SEALSQ Corp (the “Company” or “Seal”) announced its preliminary unaudited financial metrics for the nine-month period ended September 30, 2025 ("9M 2025").

· Seal’s preliminary unaudited financials for 9M 2025 revealed revenue of $9.9 million (41% increase in year on year revenue growth) with $5.1 million recorded in the third quarter of this year (which includes $1.3 million in revenue from IC'ALPS, for the two-month period since the closing of the acquisition), compared to $7.0 million in the equivalent period last year.

· Growth drivers: this 41% growth is mostly attributable to the expected return to growth in the demand for our traditional products and two months of consolidated revenue from IC’ALPS since the completion of the acquisition on August 4, 2025. However, our revenue is still negatively impacted by the ongoing transition from legacy products to next-generation post-quantum semiconductors and software.

· Treasury: a cash position of $220 million as of October 7, 2025 provides strong liquidity for PQC innovation and expansion, with the Company aiming to solidify its leadership in PQC-enabled semiconductors and its capacity to meet growing global demand for sovereign, quantum-secure technologies.

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. 333-286098), 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.

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 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

FAQ

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

SEALSQ Corp reported that on October 8, 2025 it announced its preliminary unaudited financial metrics for the nine-month period ended September 30, 2025.

Which period do SEALSQ's preliminary metrics in this 6-K cover?

The preliminary unaudited financial metrics described in the Form 6-K relate to the nine-month period ended September 30, 2025, referred to as 9M 2025.

How does this SEALSQ Form 6-K affect its existing registration statements?

The information in this Form 6-K is incorporated by reference into SEALSQ's registration statement on Form F-3 (File No. 333-286098) and its registration statement on Form S-8 (File No. 333-287139), including the related base prospectuses and any outstanding prospectus supplements.

What is the significance of incorporating the 6-K into SEALSQ's Form F-3 and Form S-8?

By incorporating this Form 6-K into its Form F-3 and Form S-8 registration statements, SEALSQ makes the preliminary unaudited 9M 2025 financial metrics part of the disclosure record used in connection with those registered securities offerings.

Who signed SEALSQ's Form 6-K for the nine months ended September 30, 2025?

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

What type of issuer is SEALSQ in this Form 6-K filing?

SEALSQ Corp files this report as a foreign private issuer under the Securities Exchange Act of 1934, using Form 6-K.