DENVER–(BUSINESS WIRE)—- $YSS–York Space Systems (York) (NYSE: YSS) today announced that Dirk Wallinger, CEO, will present at the 2026 Jefferies Space Virtual Summit. During the course of this event, York may disclose material developments affecting its business and/or financial performance. Listeners may access the event via live audio webcast at ir.yorkspacesystems.com. Tuesday, May 26, 2026 Presentation at 12pm MT / 2pm ET Duration: 30 Minutes Speaker: Dirk Wallinger, CEO Webcast: http://ir.yorks

