GOLD RESOURCE CORPORATION REPORTS FINANCIAL RESULTS FOR THE Year Ended December 31, 2025

NEWS - FOR IMMEDIATE RELEASE NYSE American: GORO GOLD RESOURCE CORPORATION REPORTS FINANCIAL RESULTS FOR THE Year Ended December 31, 2025 Denver, Colorado – March 18, 2026 – Gold Resource Corporation (NYSE American: GORO) (the “Company”) is pleased to announce its full-year operational results from its Don David Gold Mine (“DDGM”) near Oaxaca, Mexico, and a corporate update on its other activities. “We are pleased to report a successful operational turnaround during 2025 that culminated in a strong fourth quarter finish and over $25 million in cash and equivalents on the balance sheet,” said Allen Palmiere, President and CEO. “Obviously, favorable metal prices were a meaningful contribution which realized an average of $55 per ounce for silver and $4,234 per ounce for gold metal sales. Production from our Three Sisters zone made a significant contribution, as expected, and as a result we anticipate that silver will represent approximately 40% of our output from this zone in 2026 and enhance our leverage to the silver market. Our operations team in Mexico has executed exceptionally well on our 2025 objectives, delivering solid year end results, positioning us for continued momentum in the year ahead.” Don David Gold Mine: ● Production substantially improved, as the Company began receiving newly acquired equipment at the end of the third quarter. The additional equipment, combined with the strategic use of third-party contractors, enabled an increase in available headings to mine and a subsequent improvement in production. ● DDGM produced and sold a total of 23,125 gold equivalent ounces, comprising of 4,944 gold ounces and 1,461,898 silver ounces, sold at an average price per ounce of $3,657 and $45.48, respectively. DDGM total cash costs after co-product credits per gold equivalent (“AuEq”) 1 ounce sold and DDGM all-in sustaining cost per AuEq ounce sold for the year were $2,205 and $2,807, respectively. See Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Measures for a reconciliation of non-GAAP measures to applicable GAAP measures. ● DDGM received the Mexican Empresa Socialmente Responsable (“ESR”) award in 2025 for the eleventh consecutive year. ● During 2025, the Company’s exploration program focused on underground grade-control and infill drilling in support of near-term production, primarily at the Three Sisters and Arista vein systems. At Three Sisters, drilling targeted the Sandy and Sadie vein sets to refine and validate the geologic model for production planning. Additional definition drilling was completed on multiple veins within the Arista system, including Splay 31, Candelaria, Marena, Santa Helena, Viridiana, and Marena North, as well as the Soledad South vein in the Switchback vein system. Exploration-related underground development advanced throughout the year, positioning the Company to continue expansion drilling in early 2026. In addition, limited surface infill drilling also commenced at the Alta Gracia project in the fourth quarter, focusing on the Mirador vein system. Corporate and Financial: ● The Company closed the year with a $25.0 million cash and cash equivalents balance at December 31, 2025. The increase of $23.4 million from December 31, 2024 is the result of the Company’s focus on improving its cash position, mostly through the issuance of debt and equity in 2025, as well as improved production and higher metal prices. o The Company raised $2.5 million through a registered direct offering in January 2025. In September 2025, the Company closed on a second registered direct offering of $11.4 million for the sale of 25,315,954 shares of the Company’s common stock at a price of $0.45 per share. The Company issued 14,204,846 of these shares, for the fair value of approximately $6.4 million, to fully pay off the term loan received in June 2025, as a non-cash equity settlement. o The Company raised $8.6 million through its At-The-Market Offering Program (the “ATM Program”), after deducting the agent’s commissions and other expenses. o In February 2025, the Company sold its interest in Green Light Metals for $0.9 million in proceeds. o On May 7, 2025, the Company received a tax refund of 79.6 million pesos (approximately $4.0 million) related to DDGM taxes paid in 2023. ● Working capital at December 31, 2025, was $32.0 million, a 1,424% increase from the December 31, 2024 working capital of $2.1 million. The increase is primarily driven by the increase in cash and cash equivalents. 2025 Sustaining and Growth Investments Summary For the year ended December 31, 2025 2025 2024 Sustaining Investments: Underground Development $ 3,243 $ 4,634 Other Sustaining Capital 6,149 2,970 Infill Drilling 1,289 977 Surface and Underground Exploration Development & Other 1,746 65 Subtotal of Sustaining Investments: 12,427 8,646 Growth Investments: DDGM growth: Surface Exploration / Other 1,857 1,921 Underground Exploration Drilling - 38 Underground Exploration Development 8,906 - Back Forty growth: Back Forty Project Optimization & Permitting 793 378 Subtotal of Growth Investments: 11,556 2,337 Total Capital and Exploration: $ 23,983 $ 10,983 Trending Highlights 2024 2025 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Operating Data Total tonnes milled 98,889 93,687 83,690 80,367 56,906 63,479 65,131 85,888 Average Grade Gold (g/t) 1.89 1.27 0.54 0.64 0.70 0.56 1.11 0.96 Silver (g/t) 88 102 83 94 169 115 250 298 Copper (%) 0.37 0.26 0.19 0.20 0.18 0.13 0.16 0.16 Lead (%) 1.25 1.00 1.01 1.12 0.72 0.88 0.63 0.58 Zinc (%) 2.82 2.59 2.63 2.73 1.68 2.72 1.57 1.22 Metal production (before payable metal deductions) Gold (ozs.) 4,757 2,947 944 1,258 903 758 1,646 1,993 Silver (ozs.) 251,707 263,023 194,525 210,581 257,285 196,435 453,057 687,523 Copper (tonnes) 280 181 93 88 54 50 73 87 Lead (tonnes) 812 616 576 678 272 373 241 306 Zinc (tonnes) 2,310 2,020 1,741 1,734 699 1,380 784 750 Metal produced and sold Gold (ozs.) 3,557 2,724 1,357 960 859 878 1,422 1,785 Silver (ozs.) 216,535 234,560 181,434 184,804 230,320 150,365 417,710 663,503 Copper (tonnes) 264 197 98 82 50 43 67 80 Lead (tonnes) 667 491 467 548 277 272 212 253 Zinc (tonnes) 1,682 1,771 1,473 1,360 617 1,060 645 618 Average metal prices realized Gold ($ per oz.) $ 2,094 $ 2,465 $ 2,561 $ 2,706 $ 2,956 $ 3,350 $ 3,546 $ 4,234 Silver ($ per oz.) $ 23.29 $ 30.49 $ 30.61 $ 31.11 $ 32.54 $ 34.35 $ 41.39 $ 55.06 Copper ($ per tonne) $ 8,546 $ 10,428 $ 8,832 $ 8,969 $ 9,656 $ 9,619 $ 9,690 $ 11,224 Lead ($ per tonne) $ 1,977 $ 2,235 $ 2,065 $ 1,897 $ 1,950 $ 1,887 $ 1,937 $ 1,981 Zinc ($ per tonne) $ 2,483 $ 2,871 $ 2,854 $ 3,062 $ 2,710 $ 2,607 $ 2,841 $ 3,258 Gold equivalent ounces sold Gold Ounces 3,557 2,724 1,357 960 859 878 1,422 1,785 Gold Equivalent Ounces from Silver 2,408 2,901 2,169 2,125 2,535 1,542 4,876 8,628 Total AuEq oz 5,965 5,625 3,526 3,085 3,394 2,420 6,298 10,413 Year-End 2025 Conference Call The Company has elected not to hold a conference call at this time. A conference call will be scheduled in the near future to present operational results. 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 Company’s expectations regarding productivity, cash flow and operating income; (ii) Company’s anticipated near-term capital needs and potential sources of capital; and (iii) the Company’s ability to achieve production targets. 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, 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 Securities and Exchange Commission by the Company, including the Company’s Annual Report on Form 10-K for the year ended December 31, 2025, which are available on the SEC’s website at www.sec.gov. For further information, please contact: Chet Holyoak Chief Financial Officer Chet.Holyoak@grc-usa.com www.GoldResourceCorp.com 303-320-7708