Gold Resource Corporation is a small mining company that produces gold, silver, copper, lead, and zinc from its Don David Gold Mine, an underground polymetallic operation in Oaxaca, Mexico. The Don David Gold Mine is GRC's only producing asset and sole source of revenue. The mine exploits a series of epithermal vein systems — Arista, Switchback, and the newer Three Sisters — processing ore at an on-site facility to produce gold and silver doré as well as copper, lead, and zinc concentrates, which are sold to international trading houses. GRC's revenue is driven by metal volumes produced and prevailing spot prices; GRC does not hedge its metals exposure. Because roughly half of the mine's cost base is fixed, mill throughput is a key profit driver. GRC's near-term operational focus is on ramping up the Three Sisters vein system, which sits at higher grades and closer to surface than the older Arista and Switchback zones, and transitioning narrower-vein areas from long-hole to cut-and-fill mining to reduce dilution. GRC also holds the Back Forty Project, a polymetallic deposit in Michigan that remains in permitting and generates no revenue. In January 2026, GRC announced a merger agreement with Goldgroup Mining, under which GRC stockholders would own approximately 40% of the combined company.