GOLD RESOURCE CORPORATION ANNOUNCES STRONG PRELIMINARY YEAR-END RESULTS, HIGHLIGHTING OPERATIONAL TURNAROUND

NEWS - FOR IMMEDIATE RELEASE NYSE American: GORO GOLD RESOURCE CORPORATION ANNOUNCES STRONG PRELIMINARY YEAR-END RESULTS, HIGHLIGHTING OPERATIONAL TURNAROUND Denver, Colorado – January 20, 2026 – Gold Resource Corporation (NYSE American: GORO) (the “Company”) is pleased to announce preliminary fourth quarter production results from its Don David Gold Mine that are a significant improvement from previous quarters and represents 45% of the full-year production for 2025. The net result is a significantly improved year-end balance sheet with $25 million of cash and equivalents and no debt. During the quarter, the Company’s production profile has transitioned into more of a silver producer, accounting for about 80% of its revenue, including a record sale of 663,503 ounces of silver, 1,785 ounces of gold and a total gold equivalent (“AuEq”) ounces of 10,413. For the twelve months ending December 31, 2025, the Company sold 23,125 AuEq ounces. “We are extremely pleased to report such a strong finish to 2025, reflecting the successful turnaround in operations and increasing ore production from the new Three Sisters area with higher grades and improved production, combined with record high metal prices,” said Allen Palmiere, President and CEO. “During the quarter, we realized an average sale price of $55 per ounce of silver and $4,234 per ounce for gold. In 2026, we expect continued leverage to the silver price with 40% of our production from the Three Sisters area. Overall, we are pleased with the mine’s performance, which reflects the execution of the operational plans and new equipment we outlined a year ago. I would like to thank the entire team for their focus and execution in delivering these outstanding operational results.” Sales Statistics For the three months ended December 31, For the nine months ended December 31, 2025 2024 2025 2024 Metal produced and sold Gold (ozs.) 1,785 960 4,944 8,598 Silver (ozs.) 663,503 184,804 1,461,898 817,333 Copper (tonnes) 80 82 240 641 Lead (tonnes) 253 548 1,014 2,173 Zinc (tonnes) 618 1,360 2,940 6,286 Average metal prices realized (1) Gold ($ per oz.) $ 4,234 $ 2,706 $ 3,657 $ 2,354 Silver ($ per oz.) $ 55 $ 31 $ 45 $ 29 Copper ($ per tonne) $ 11,224 $ 8,969 $ 10,181 $ 9,223 Lead ($ per tonne) $ 1,981 $ 1,897 $ 1,938 $ 2,034 Zinc ($ per tonne) $ 3,258 $ 3,062 $ 2,817 $ 2,804 Gold equivalent ounces sold Gold Ounces 1,785 960 4,944 8,598 Gold Equivalent Ounces from Silver 8,628 2,125 18,181 9,982 Total AuEq oz 10,413 3,085 23,125 18,580 (1) Average metal prices realized vary from the market metal prices due to final settlement adjustments from our provisional invoices. Our average metal prices realized will therefore differ from the average market metal prices in most cases. Trending Production Statistics Q3 2024 Q4 2024 Q1 2025 Q2 2025 Q3 2025 Q4 2025 Tonnes Milled Tonnes Milled 83,690 80,367 56,906 63,479 65,131 85,888 Tonnes Milled per Day (2) 1,244 1,228 1,094 1,218 1,124 1,305 Grade Average Gold Grade (g/t) 0.54 0.64 0.70 0.56 1.11 0.96 Average Silver Grade (g/t) 83 94 169 115 250 298 Average Copper Grade (%) 0.19 0.20 0.18 0.13 0.16 0.16 Average Lead Grade (%) 1.01 1.12 0.72 0.88 0.63 0.58 Average Zinc Grade (%) 2.63 2.73 1.68 2.72 1.57 1.22 Metal production (before payable metal deductions) (3) Gold (ozs.) 944 1,258 903 758 1,646 1,993 Silver (ozs.) 194,525 210,581 257,285 196,435 453,057 687,523 Copper (tonnes) 93 88 54 50 73 87 Lead (tonnes) 576 678 272 373 241 306 Zinc (tonnes) 1,741 1,734 699 1,380 784 750 (2) Based on actual days the mill operated during the period. (3) The difference between what we report as "Metal Production" and "Metal Sold" is attributable to the difference between the quantities of metals contained in the concentrates we produce versus the portion of those metals actually paid for according to the terms of our sales contracts. Differences can also arise from inventory changes related to shipping schedules, or variances in ore grades and recoveries which impact the amount of metals contained in concentrates produced and sold. About GRC: Gold Resource Corporation is a gold and silver producer, developer, and explorer with its operations centered on the Don David Gold Mine in Oaxaca, Mexico. Under the direction of an experienced board and senior leadership team, the Company’s focus is to unlock the significant upside potential of its existing infrastructure and large land position surrounding the mine in Oaxaca, Mexico and to develop the Back Forty Project in Michigan, USA. For more information, please visit the Company’s website, located at www.goldresourcecorp.com. Forward-Looking Statements: This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking words such as “plan,” “target,” “anticipate,” “believe,” “estimate,” “intend” and “expect” and similar expressions are intended to identify such forward-looking statements. Such forward-looking statements include, without limitation, (i) the preliminary fourth quarter production results and cash balance and (ii) the Company’s production expectations for 2026. All forward-looking statements in this press release are based upon information available to the Company as of the date of this press release, and the Company assumes no obligation to update any such forward-looking statements. Forward-looking statements involve a number of risks and uncertainties such as commodity price volatility, operating risks, risks related to political, regulatory and labor matters, market trends and conditions and other factors discussed in the Company’s periodic reports filed with the Securities and Exchange Commission (the “SEC”), and there can be no assurance that such statements will prove to be accurate. The Company’s actual results could differ materially from those discussed in this press release. Forward-looking statements are subject to risks and uncertainties. Additional risks related to the Company may be found in the periodic and current reports filed with the SEC by the Company, including the Company’s Annual Report on Form 10-K for the year ended December 31, 2024, which are available on the SEC’s website at www.sec.gov. Contacts: Chet Holyoak Chief Financial Officer Chet.Holyoak@GRC-USA.com www.GoldResourceCorp.com