SUNx and WISeKey Announce the World’s First “Earth Watch” NFT auction The Auction will be the first NFT sale for sustainable development and climate resilience causes Geneva, Switzerland: Brussels Belgium – April 19, 2021 - WISeKey International Holding Ltd (NASDAQ: WKEY; SIX: WIHN), a leading cyber security, IoT, and AI platform company, today announced that in cooperation with global initiative for Climate Friendly Travel SUNx — Strong Universal Network, it has created the first ever Non-Fungible Token (NFT) related to climate change and sustainability. For more information visit: https://goodtourismblog.com/2021/04/time-to-be-strong-nft-earth-swatch-auction-benefit-tourism-recovery-climate-causes/. The first-off-the-line “Earth Swatch” watch, designed by climate activist and sustainable development pioneer Maurice Strong for the 1992 Rio Earth Summit, with the theme “In Our Hands,” is going up for auction this Earth Day, April 22 at 15:00 CET. The auction will run until 18:00 CET on June 5, 2021, which is the World Environment Day. The watch was given to Mr. Strong’s widow, Hanne Strong, by the wife of Swatch founder Nicolas Hayek. Ms. Strong, in turn, is donating the watch for the “cyber auction.” This Earth Swatch will be given an eternal digital life with certified ownership and authenticity. This digital twin will be the "authentic" double of the physical watch in the digital space. To launch the NFT sale, WISeKey Founder Carlos Moreira, and SUNx President Geoffrey Lipman, will host a virtual seminar with: Hanne Strong, President of the Manitou Foundation USA, Felix Dodds, Co-Author with Maurice Strong of “Only One Earth USA,” Mirian Vilela, Executive Secretary of the Earth Charter Institute established by Maurice Strong and Mikhail Gorbachev in 2000, and JinFeng Zhou, Secretary General of CBCGDF China. During the virtual seminar, speakers will discuss the charities that will benefit from the NFT auction, as well as the vision of Mr. Strong who first called Climate Change existential back in 1972 and spent his life building a global response system, which is today embodied by the Sustainable Development Goals and the Paris Climate Agreement. The winner of the auction will take ownership of the digital twin of Hanne Strong’s original Earth Swatch, a timepiece that served to raise funds to take 150 Non-governmental organizations to the 1992 Earth Summit, starting the engagement of Civil Society in Sustainability Agenda. The NFT will be created during the Webinar: The “Strong Earth NFT” – It’s in Our Hands. Registration is open at: https://us02web.zoom.us/webinar/register/WN_P8NZwDfATkSHyGw9RIEiCw Date & TimeApril 22nd03:00 pm CETTitleWebinar: The “Strong Earth NFT” – It’s in Our HandsSpeakers Carlos Creus Moreira: Founder, Chairman and CEO at WiseKeyFelix Dodds: Co-Founder of SUNx – Strong Universal NetworkGeoffrey Lipman: Former Assistant Secretary General World Tourism Organization, Co-Founder at The SUNx ProgramHanne Strong: President Manitou FoundationMirian Vilela: Executive Director; Earth Charter InternationalJinfeng Zhou: Secretary General of China Biodiversity Conservation and Green Development Foundation (CBCGDF) Press and investor contacts: WISeKey International Holding LtdCompany Contact: Carlos MoreiraChairman & CEOTel: +41 22 594 firstname.lastname@example.org WISeKey Investor Relations (US)Contact: Lena CatiThe Equity Group Inc.Tel: +1 212 email@example.com 289 Consulting Marine Lemonnier-Brennan firstname.lastname@example.org T.+41 79 389 67 62 SUNx PresidentProfessor Geoffrey Lipmanglipman@thesunprogram.comTel: +32495250789 About WISeKey WISeKey (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 today’s Internet of Everything. WISeKey IoT has an install base of over 1.5 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 edge of IoT as our semiconductors produce a huge amount of Big Data that, when analyzed with Artificial Intelligence (AI), can help industrial applications to predict the failure of their equipment before it happens. Our technology is Trusted by the OISTE/WISeKey’s Swiss 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 WISeKey RoT serves as a common trust anchor to ensure the integrity of online transactions among objects and between objects and people. For more information, visit www.wisekey.com. SUNx is a not-for-profit, EU based, initiative to honour the vision of the late Maurice Strong, Climate activist half a century ago, and to advance Climate Friendly Travel – Low Carbon: SDG linked: Paris 1.5 aligned for a green and clean future. 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, financial condition, 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 herein as a result of new 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.