WISeKey Announces Planned Completion Of Redomiciliation From Switzerland To The British Virgin Islands Via Merger With WISeQey Corp., Trading Under Ticker "WQEY" To Begin October 5, 2026

WISeKey International Holding Ltd ("WISeKey" or the "Company") ((SIX: WIHN, NASDAQ:WKEY) today announced that it expects the previously announced redomiciliation of WISeKey from Switzerland to the British Virgin Islands to become effective on October 2, 2026 (the "Redomiciliation"). The Redomiciliation is being implemented through the cross-border merger of WISeKey with and into its wholly owned British Virgin Islands subsidiary, WISeQey Corp. (formerly known as WISeKey International Corp., "WISeQey"), with WISeQey continuing as the surviving company (the "Merger"). The Merger and Redomiciliation are expected to become legally effective on October 2, 2026, following completion of the applicable registration procedures.

Upon the effectiveness of the Merger:

• WISeKey will be absorbed into WISeQey and WISeKey will cease to exist as a separate legal entity; and
• WISeQey will succeed to all of the assets, rights, liabilities and obligations of WISeKey;

The Redomiciliation is not expected to change WISeKey’s underlying businesses or operations. The WISeQey’s operational headquarters and place of effective management will remain in Switzerland, and its global operations will continue as before.

In connection with the expected completion of the Merger, the ordinary shares of WISeQey are expected to commence trading on the Nasdaq Global Market under the ticker symbol "WQEY" and on the SIX Swiss Exchange, where they will have a primary listing, under the ticker symbol "WQEY", on or about October 5, 2026.

We expect October 2, 2026 to be the last day of trading for the existing American Depositary Shares of WISeKey on Nasdaq and for the existing Class B shares of WISeKey on SIX Swiss Exchange. Following delisting and cancellation, holders of WISeKey securities will receive the applicable securities of WISeQey in accordance with the exchange ratios, elections and settlement procedures previously communicated to shareholders and described in the prospectus relating to the Merger, with the first day of trading for the WISeQey ordinary shares expected to occur on October 5, 2026.

WISeKey shareholders approved the Merger and the related Merger Agreement at the Extraordinary General Meeting held on September 9, 2026.