YSS 🟢 York Space Systems Inc. is trading 4.87% up in pre-market York Space Systems Inc. June 29, 2026 YSS is trading at $27.54, up 4.87% in pre-market. Open in OpenBell More YSS News Related News YSS October 21, 2026 🟢 York Space Systems is trading 5% up in pre-market; catalyst remains unclear YSS October 20, 2026 🟢 York Space Systems is trading 5.7% up in after-hours trading with no clear company-specific catalyst YSS October 18, 2026 York Space Systems sued, software flaws allegedly risked Pentagon satellite contracts YSS October 16, 2026 🔴 York Space Systems is trading 6.39% down on October 16, 2026, amid AI-infrastructure debt concerns YSS October 16, 2026 York Space Systems Gets Neutral Rating, $9 Target Amid Competition