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WKEY 6-K

Wisekey International Holding S.A. (WKEY)

6-K 2026-05-04 For: 2026-05-04
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Added on May 04, 2026

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 underthe

Securities Exchange Act of 1934

For the month of May 2026

Commission File Number: 001-39115

WISEKEY INTERNATIONAL HOLDING AG

(Exact Name of Registrant as Specified in Charter)

WISEKEY INTERNATIONAL HOLDING LTD

**(**Translationof Registrant’s name into English)

Canton of Zug, Switzerland General-Guisan-Strasse 6<br><br> <br>CH-6300 Zug, Switzerland<br><br> <br>**** Not Applicable
(State<br> or other jurisdiction of incorporation or organization) (Address<br> of principal executive office) (I.R.S.<br> 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:

x Form 20-F                ¨ Form 40-F

Exhibit<br><br> No. Description
99.1 2025<br> Annual Report of WISeKey International Holdings AG
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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:    May 4, 2026 WISEKEY INTERNATIONAL HOLDING AG
By: /s/ Carlos Moreira
Name: Carlos Moreira
Title: Chief Executive Officer
By: /s/ John O’Hara
Name: John O’Hara
Title: Chief Financial Officer
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