Form 8-K Filing Regarding Executive Departures and Separation Agreements

This Form 8-K filing by Arq, Inc. reports the departure of Chief Operating Officer Jeremy "Deke" Williamson and Chief Financial Officer Jay Voncannon, effective March 4, 2026. Both executives remained employed until April 18, 2026, and subsequently entered into Separation and General Release Agreements with the Company, effective April 29, 2026. Under the agreement, Mr. Williamson will receive 12 months of his base salary (approximately $361,500), accelerated vesting of 34,270 shares of restricted stock, accelerated vesting of 49,736 performance share units, and 12 months of COBRA premium payments. Mr. Voncannon is entitled to the accelerated vesting of 50,000 shares of restricted stock and will continue to receive statutory COBRA benefits for 18 months. Both agreements include a customary release of claims against the Company. The filing also lists the exhibits, which include the separation agreements for both executives.