Officer or director change

Summary

• York Space Systems announced on August 5, 2026 the appointment of Brian D. Frantz, its Chief Accounting Officer, as Interim Chief Financial Officer effective August 14, 2026.
• Frantz will act as the Company's principal financial officer while a formal search for a permanent Chief Financial Officer is conducted.
• Frantz, age 63, has served as Chief Accounting Officer since September 2025 and previously held finance roles at Summit Materials, Inc. and Intrepid Potash, Inc.
• Frantz's base salary will be increased by $9,000 per month to a total of $36,000 per month during his service as Interim Chief Financial Officer.
• Kevin Messerle notified the Company of his departure on July 30, 2026 and will remain as Chief Financial Officer through the filing of the second quarter 2026 Form 10-Q scheduled for August 13, 2026.
• Messerle is pursuing an opportunity outside the space industry, and his departure is not the result of any disagreement over the Company's operations, policies or practices.

Why it mattersYork Space Systems is transitioning its principal financial officer role on an interim basis while searching for a permanent CFO. The outgoing CFO remains through the August 13, 2026 Form 10-Q filing.