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 |
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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
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and any prospectus supplement outstanding under each of the foregoing registration statements, to the extent not superseded by documents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 |
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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 |
