GlobeNewswire Inc | Dec 13, 2021 12:00PM EST

December 13, 2021

WISeKey celebrates 15thanniversary of partnership with CISCO with 100 million chips delivered so far and announces opening of a second additional sourcing to support growth

Geneva, Switzerland December 13, 2021: WISeKey International Holding Ltd (WISeKey, SIX: WIHN / Nasdaq: WKEY), a leading global Semi-conductor, AI and IoT company, announces that it is celebrating this year the 15th anniversary of its supply partnership with CISCO with the delivery of the hundredth million chip and the addition of a second industrial sourcing to support the growth of the business.

WISeKey is celebrating this year the 15th anniversary of its supply partnership with Cisco. WISeKey has been a strong partner to Cisco from all aspects: technology, quality and supply flexibility. The relationship started in 2007 and we have since them used more then 100 million WISeKey chips in our product. We value the relationship with the WISeKey executive team, said Marco De Martin, Cisco Global Supplier Management Vice President.

WISeKeys partnership with Cisco has only grown stronger during the unique circumstances we face together with todays constrained supply chain. We look forward to continued partnership with Cisco, overcoming the challenges of today and taking on those of tomorrow, said Richard Venia, US Sales Director for WISeKey.

About WISeKeyWISeKey (NASDAQ: WKEY; SIX Swiss Exchange: WIHN) is a leading global cybersecurity company currently deploying large-scale digital identity ecosystems for people and objects using Blockchain, AI, and IoT respecting the Human as the Fulcrum of the Internet. WISeKey microprocessors secure the pervasive computing shaping todays Internet of Everything. WISeKey IoT has an installed base of over 1.6 billion microchips in virtually all IoT sectors (connected cars, smart cities, drones, agricultural sensors, anti-counterfeiting, smart lighting, servers, computers, mobile phones, crypto tokens, etc.). WISeKey is uniquely positioned to be at the leading edge of IoT as our semiconductors produce a huge amount of Big Data that, when analyzed with Artificial Intelligence (AI), can help industrial applications predict the failure of their equipment before it happens.

Our technology is Trusted by the OISTE/WISeKeysSwiss-based cryptographic Root of Trust (RoT) provides secure authentication and identification, in both physical and virtual environments, for the Internet of Things, Blockchain, and Artificial Intelligence. The WISeKeyRoTserves as a common trust anchor to ensure the integrity of online transactions among objects and between objects and people. For more information, visitwww.wisekey.com.

Press and investor contacts:WISeKey International Holding LtdCompany Contact: Carlos MoreiraChairman & CEOTel:+41 22 594 3000info@wisekey.com

WISeKey Investor Relations (US)Contact: Lena CatiThe Equity Group Inc.Tel:+1 212 836-9611lcati@equityny.com

Disclaimer:This communication expressly or implicitly contains certain forward-looking statements concerning WISeKey International Holding Ltd and its business. Such statements involve certain known and unknown risks, uncertainties, and other factors, which could cause the actual results, financialcondition, performance, or achievements of WISeKey International Holding Ltd to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. WISeKey International Holding Ltd is providing this communication as of this date and does not undertake to update any forward-looking statements contained hereinas a result ofnew information, future events or otherwise.This press release does not constitute an offer to sell, or a solicitation of an offer to buy, any securities, and it does not constitute an offering prospectus within the meaning of article 652a or article 1156 of the Swiss Code of Obligations or a listing prospectus within the meaning of the listing rules of the SIX Swiss Exchange. Investors must rely on their own evaluation of WISeKey and its securities, including the merits and risks involved. Nothing contained herein is, or shall be relied on as, a promise or representation as to the future performance of WISeKey.

This press release does not constitute an offer to sell, or a solicitation of an offer to buy, any securities, and it does not constitute an offering prospectus within the meaning of article 652a or article 1156 of the Swiss Code of Obligations or a listing prospectus within the meaning of the listing rules of the SIX Swiss Exchange. Investors must rely on their own evaluation of WISeKey and its securities, including the merits and risks involved. Nothing contained herein is, or shall be relied on as, a promise or representation as to the future performance of WISeKey.