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 January 2026
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 |
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| (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
FY 2025 Preliminary Unaudited Key Operational and Financial Metrics
SEALSQ Corp (NASDAQ: LAES) (“SEALSQ” or the “Company”)
announced full-year (FY) 2025 key operational and financial metrics (all financial data are preliminary and unaudited).
FY 2025 Revenue and Financial Highlights:
• +66% year on year revenue growth: Preliminary unaudited 2025
revenue of $18 million, with $8 million recorded in the fourth quarter of the year, compared to $4 million in the equivalent period last
year.
• Growth drivers: The growth was driven primarily by renewed
demand for traditional SEALSQ products and the consolidation of five months of revenue from IC’ALPS, following its acquisition on
August 4, 2025. During the year, the Company continued to strengthen its commercial base and technological roadmap, however, revenue remained
adversely impacted by the ongoing transition from legacy products to next-generation post-quantum semiconductors and software.
• Treasury: Cash position of over $425 million as of December
31, 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 Company’s preliminary unaudited fourth quarter and full year
2025 revenue results are based on current expectations and may be adjusted as a result of, among other things, completion of annual audit
procedures. This financial information does not represent a comprehensive statement of the Company’s financial results for the fourth
quarter or full year 2025 and remains subject to the completion of financial closing procedures and internal reviews.
Forward-Looking Statements
This Current Report on Form 6-K expressly or implicitly contains certain
forward-looking statements concerning SEALSQ Corp and its businesses. Forward-looking statements include statements regarding our business
strategy, pipeline estimates, financial performance, results of operations, market data, events or developments that we expect or anticipate
will occur in the future, as well as any other statements which are not historical facts. Although we believe that the expectations reflected
in such forward-looking statements are reasonable, no assurance can be given that such expectations will prove to have been correct. These
statements involve known and unknown risks and are based upon a number of assumptions and estimates which are inherently subject to significant
uncertainties and contingencies, many of which are beyond our control. Actual results may differ materially from those expressed or implied
by such forward-looking statements. Important factors that, in our view, could cause actual results to differ materially from those discussed
in the forward-looking statements include the risks related to the finalization of the financial results for the fourth quarter and year
ended December 31, 2025; SEALSQ's ability to continue beneficial transactions with material parties, including a limited number of significant
customers; market demand and semiconductor industry conditions; and the risks discussed in SEALSQ's filings with the SEC. As a result,
the preliminary financial results contained in this Form 6-K may materially differ from the actual results that will be reflected in the
consolidated financial statements for the fiscal year 2025 when they are completed and publicly disclosed. Risks and uncertainties are
further described in reports filed by SEALSQ with the SEC. SEALSQ Corp is providing this Current Report on Form 6-K as of this date and
does not undertake to update any forward-looking statements contained herein as a result of new information, future events or otherwise.
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, as amended.
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: January 14, 2026 |
SEALSQ CORP |
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By: |
/s/ Carlos Moreira |
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Name: |
Carlos Moreira |
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Title: |
Chief Executive Officer |
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By: |
/s/ John O’Hara |
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Name: |
John O’Hara |
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Title: |
Chief Financial Officer |
