Arq, Inc. 10-K

Item 2. Properties Office and Facilities We own or lease land and facilities in the following States: Colorado - We lease approximately 24,000 square feet for our corporate headquarters and primary research and development laboratory, located in Greenwood Village, Colorado. Louisiana - We own the Red River Plant, which is located on approximately 61 acres in Coushatta, Louisiana. We also lease approximately 141,000 square feet in various locations in Louisiana that are used for production, distribution and storage. Kentucky - We lease approximately 470 acres in Corbin, Kentucky where we operate the Corbin Facility. During 2025, as a cost saving measure, we periodically idled the Corbin Facility, and it has been idled since January 1, 2026. Mining As of December 31, 2025, we owned or controlled, primarily through long-term leases, approximately 1,975 acres of land for surface coal mining located in Natchitoches Parish, Louisiana ("Five Forks"). The majority of the Five Forks land is leased for mineral rights and right-of-use purposes that expire at varying dates over the next 30 years and contain options to renew. The remaining land is owned by us. 24 We also have approximately 380 permitted acres of land at the Corbin Facility from which we recover bituminous coal fines, which is leased through August 31, 2030 and contains options to renew for successive five year terms until all merchantable fines are removed from the premises. Based on the materiality and the vertically-integrated company guidelines contained in Regulation S-K of the Securities Act and the Exchange Act, we have concluded that no additional disclosures related to our mining operations are required under this Item.