Gold Resource Corporation Reports Financial Results for the Year Ended December 31, 2025

Gold Resource Corporation Reports Financial Results for the Year Ended December 31, 2025 DENVER--( BUSINESS WIRE)--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:

Corporate and Financial:

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

Subtotal of Sustaining Investments:

12,427

8,646

Growth Investments:

DDGM growth:

Surface Exploration / Other

1,857

1,921

Underground Exploration Drilling

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

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)

102

169

115

250

298

Copper (%)

0.37

0.26

0.19

0.20

0.18

0.13

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

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

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.