WISeKey Appoints Alexander Hirsch as Group Chief Marketing Officer to Coordinate Global Marketing Across the Group Source: GlobeNewswire Geneva, Switzerland — August 21, 2026 — WISeKey International Holding Ltd. (SIX: WIHN; NASDAQ: WKEY), a global leader in cybersecurity, digital identity and IoT, today announced the appointment of Alexander Hirsch as Group Chief Marketing Officer (CMO), with responsibility for coordinating and accelerating the marketing, communications, brand positioning and go-to-market activities of WISeKey Group and its affiliated companies, including its SEALSQ Corp (Nasdaq: LAES) (“SEALSQ”), SEALQUANTUM, WISeSat and WISeID subsidiaries. The appointment comes as the Group enters a new phase of international expansion across post-quantum cybersecurity, semiconductors, quantum technologies, satellite communications and digital identity. In his role as Group CMO, Mr. Hirsch will work closely with the leadership and marketing teams of each company to create a more integrated global strategy while preserving the specialized positioning and market identity of each business. Mr. Hirsch brings over 15 years of international marketing leadership, specializing in scale-up strategies, corporate communications, and high-impact global partnerships. Throughout his career, he has built a strong reputation for bridging complex, cutting-edge technologies with commercial market success, creating compelling narratives that resonate across enterprise clients, strategic partners, and key industry stakeholders. Prior to joining WISeKey, Mr. Hirsch was Senior Director of EMEA Executive Field Marketing at Salesforce, where he directed executive marketing strategies and brand presence across Europe. During his tenure, he spearheaded major global partnership initiatives, including Salesforce's F1 activations and engagements at the World Economic Forum Annual Meeting in Davos, and oversaw the region's Salesforce Innovation Centers, which served as flagship briefing hubs for C-suite digital transformation strategy. He also drove marketing programs across Salesforce’s proprietary events and high-caliber third-party industry gatherings, delivering high-impact digital transformation experiences for C-suite leaders. In these roles, he drove engagements for