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GORO.V ·

GOLDGROUP FILES SECOND QUARTER 2026 FINANCIAL RESULTS AND PROVIDES UPDATE ON COMBINED COMPANY Javier Reyes Appointed Chief Executive Officer by Unanimous Decision of the Board of Directors Cash Balance US $59 Million and Zero Debt

Financials Marketing Announcement Corporate Updates

NEWS RELEASE

GOLDGROUP FILES SECOND QUARTER 2026 FINANCIAL RESULTS AND PROVIDES

UPDATE ON COMBINED COMPANY

Javier Reyes Appointed Chief Executive Officer by Unanimous

Decision of the Board of Directors

Cash Balance US $59 Million and Zero Debt

Vancouver, British Columbia – August 31, 2026 – Goldgroup Mining Inc. (“Goldgroup” or the “Company”)

(TSXV: GORO; NYSE American: GORO; FSE: 55G0) is pleased to announce that it has filed its financial

statements and management’s discussion and analysis (“MD&A”) for the second quarter ended June 30,

2026.

The Company is also pleased to announce that the Board of Directors of Goldgroup has appointed Mr. Javier

Reyes, who had been serving as Interim Chief Executive Officer, as the Company’s permanent Chief Executive

Officer. Mr. Reyes is a mining entrepreneur and corporate executive with more than 25 years of leadership

experience in the natural resources and financial sectors. Throughout his career, Mr. Reyes has founded,

financed, acquired, and transformed several publicly traded companies, establishing a proven track record of

executing complex recapitalizations, strategic transactions, and corporate turnarounds.

In addition, the Company provides an update on activities across its expanded portfolio following the

completion of its transformational combination with Gold Resource Corporation (“Gold Resource”) on July

17, 2026.

Q2 FINANCIAL REPORTING

Goldgroup’s second quarter financial statements and MD&A cover the three and six months ended June 30,

2026, and relate to Goldgroup’s operations prior to completion of the transaction with Gold Resource.

Importantly, the Q2 financial statements do not include the financial results or operating activities of Gold

Resource. The transaction with Gold Resource was completed after the June 30, 2026 quarter-end and,

accordingly, Gold Resource’s results will be incorporated into Goldgroup’s consolidated financial reporting

beginning with the period in which the transaction closed.

Javier Reyes, Chief Executive Officer and Chair of the Board of Goldgroup, commented:

“The filing of our second quarter financial results marks an important reporting milestone for Goldgroup.

However, shareholders should recognize that these results represent Goldgroup as it existed prior to the

completion of our combination with Gold Resource and therefore do not reflect the financial contribution or

operating performance of Don David or Back Forty. ”

“The real significance for shareholders is what has happened since quarter-end. We have completed the

transformational combination and are now operating a substantially larger company with two producing

mines, a formerly producing operation being evaluated for a potential restart and a major development

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project. At the same time, we are advancing aggressive exploration and development programs across the

portfolio. ”

“Our focus is straightforward: grow production, expand resources, extend mine lives and advance San

Francisco and Back Forty toward their next major milestones. We believe the combined company provides

Goldgroup with a much stronger platform from which to create long-term shareholder value. ”

Goldgroup Operating and Financial Results Summary for the Second Quarter Period Ending June 30, 2026

Operating Statistics Three months

ended

June 30, 2026

Three months

ended

June 30, 2025

Six months

ended

June 30, 2026

Six months ended

June 30, 2025

High-grade ore mined (t) 305,300 159,264 650,000 253,407

Run of mine (“ROM”) (t) 13,955 - 50,889 -

Waste mined (tonnes) 2,623,628 580,021 4,862,937 912,462

Total mined (tonnes) 2,942,883 739,285 5,563,826 1,165,869

Waste-to-ore-ratio 8.22 3.64 6.94 3.6

Ore to pad (t) 318,437 163,063 596,693 388,042

ROM to pad (t) 13,955 - 50,889 -

Recovery 66% 48% 85% 49%

Grade of ore mined (g/t Au) 0.59 0.59 0.55 0.62

Grade of ROM mined (g/t Au) 0.30 - 0.41 -

Grade of ore placed on pad (g/t

Au)

0.56 0.57 0.48 0.55

Grade of ROM placed on pad (g/t

Au)

0.30 - 0.41 -

Gold ounces – produced 3,843 1,446 7,938 3,417

Gold ounces – sold 4,748 1,588 8,996 3,190

Average realized price per

ounce(1)

$ 4,429 $ 3,348 $ 4,669 $ 3,080

(1) This is a non-IFRS measure. For more information, including a reconciliation to the most comparable

IFRS measure, refer to the “Non-IFRS Financial Measures” section of this MD&A.

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The completed combination with Gold Resource brings together Goldgroup’s Mexican portfolio with Gold

Resource’s producing Don David Gold Mine in Oaxaca, Mexico and the Back Forty development project in

Michigan, USA. The combined company now holds four 100%-owned precious-metals assets across Mexico

and the United States, including two producing mines, a formerly producing mine under evaluation for re-

start and an advanced development project.

COMBINED COMPANY ENTERS NEXT PHASE OF GROWTH

Following completion of the merger transaction, Goldgroup has moved rapidly to integrate the businesses

while advancing exploration, production optimization and development activities across the portfolio.

The Company is focused on building a larger-scale, diversified precious-metals producer through a

combination of organic production growth, exploration success, mine optimization and disciplined project

development.

(tabled amounts are expressed in thousands of U.S

dollars)

Three months ended June 30, Six months ended June 30,

2026 2025 2026 2025

Revenue

Gold sales $ 21,031 $ 5,317 $ 41,998 $

9,82

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Silver sales 75 47 303 119

Cost of operation

21,106 5,364 42,301 9,944

Cost of sales (14,512) (3,476) (32,112) (6,230)

Depreciation and depletion (365) (183) (848) (352)

6,229 1,705 9,341 3,362

Depreciation (6) (3) (7) (5)

Share-based compensation - (10) - (31)

General and administrative (49) (739) (498) (898)

Salary and consulting (212) (154) (612) (311)

Professional fees (1,548) (425) (3,298) (899)

Care and maintenance – San Francisco (1,711) - (2,542) -

Impairment of Pinos Project - (27,648) - (27,648)

Finance cost (910) (31) (1,263) (62)

Exploration costs - (193) (161) (306)

Unrealized derivative gain (loss) – warrant liability (4,777) (8,013) 2,827 (15,743)

Foreign exchange gain (loss) (1,455) 301 (1,321) 107

Other income 84 72 144 87

(Loss) income before income taxes (4,355) (35,138) 2,610 (42,347)

Income taxes (expense) recovery – current (1,725) 8 (2,338) 4

(Loss) income and comprehensive (loss) income

(6,080)

(35,130)

272

(42,343)

Loss per share – Basic and diluted

$ (0.02)

$ (0.68)

$ 0.00

$ (0.96)

Weighted average shares outstanding (000’s)

Basic 74,624 51,888 74,193 44,040

Diluted 74,624 51,888 82,077 44,040

Total shares issued and outstanding (000’s) 75,515 54,821 75,515 54,821

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As of June 30, 2026, prior to the completion of the merger, Goldgroup had a cash balance of US$15.7 million

and Gold Resource had a cash balance of US$43.3 million. On a pro forma basis, assuming the companies

had been combined as of June 30, 2026, the combined company would have had a cash balance of US$59

million and no material debt. Sales data for the first half of the year, on a combined basis, is shown in the

table below.

Combined Sales June 30, 2026

Mine Metal Sold

Don David Gold (oz) 2,903

Silver (oz) 732,819

Lead (lbs) 1,806,843

Zinc (lbs) - 4,081,793

Copper (lbs) 318,370

Gold Equivalent* 18,365

Cerro Prieto Gold (oz) 8,996

Silver (oz) 3,775

Lead (lbs) -

Zinc (lbs) - -

Copper (lbs) -

Gold Equivalent* 9,060

Total Gold Equivalent* 27,425

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Project Location Map

Don David Gold Mine – Oaxaca, Mexico

The Don David Gold Mine is now the Company's largest producing asset and is the focus of an aggressive

exploration and resource-expansion program.

The Company completed 25,726 metres of diamond drilling in 123 holes at the Don David complex with

highly encouraging results (see news release dated August 17, 2026). The program focused primarily on infill

and expansion drilling at the producing Arista and Alta Gracia mines, with the majority of the drilling directed

toward resource definition and expansion. Up to six drill rigs were operating concurrently during the program.

The Company is also advancing exploration of several highly prospective targets surrounding the existing

mine infrastructure, with the objective of replacing and expanding resources, extending mine life and

identifying additional mineralized structures.

San Francisco – Sonora, Mexico

Goldgroup is advancing the 100%-owned San Francisco Gold Project toward a potential production restart.

A 26,000-metre diamond drilling program is underway, alongside technical studies and mine-planning

activities designed to establish the optimal pathway toward a potential restart of the formerly producing

open-pit operation.

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Existing infrastructure, including two open pits and heap-leach processing facilities, provides a significant

foundation for evaluating a potential restart.

The Company is targeting a potential restart in 2027, subject to completion of technical studies, mine

planning, financing and other applicable requirements that support the Company restarting operations.

Cerro Prieto – Sonora, Mexico

The 100%-owned Cerro Prieto heap-leach gold mine continues to produce gold while the Company advances

exploration and development drilling aimed at extending and potentially expanding the resource base.

Cerro Prieto has been in production since 2013 and provides the Company with an existing operating platform

in Sonora while exploration continues along the mineralized trend.

Back Forty – Michigan, USA

Goldgroup is also advancing the 100%-owned Back Forty project, a large-scale, gold-rich volcanogenic

massive sulphide (“VMS”) development project in Michigan, subject to the resolution of matters relating to

the stream agreements described below and in the MD&A.

Work is progressing on a feasibility study and related development activities. Back Forty provides the

Company with a significant longer-term development opportunity and further diversifies Goldgroup's portfolio

geographically and by deposit type.

Back Forty is subject to gold and silver stream agreements under which a current Goldgroup subsidiary

received US$37.2 million in exchange for a portion of future production. The agreements include funding,

default and security provisions. The permitting milestone, previously extended to August 31, 2026, was not

met, and Goldgroup is discussing a further amendment. If no amendment is obtained and the Company

defaults, it may be required to repay amounts advanced, plus interest, and the counterparty may exercise

secured party rights over the Back Forty assets.

TECHNICAL REPORTS REFILED UNDER GOLDGROUP PROFILE

Following completion of the merger with Gold Resource, the Company has filed the current technical reports

for the Don David Gold Mine and the Back Forty Project under its SEDAR+ profile in accordance with National

Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”). The reports support the

previously disclosed technical and scientific information for the respective projects.

EXPLORATION PIPELINE PROVIDES ADDITIONAL UPSIDE

Beyond the Company's producing and advanced development assets, Goldgroup is continuing to evaluate

and advance exploration opportunities across its portfolio.

At Don David, the Company is pursuing multiple exploration targets, including some high-grade zones, with

potential to extend known mineralized systems and identify new discoveries. The Company has also

identified significant exploration potential at San Francisco and Cerro Prieto.

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The Company's objective is to create a portfolio in which existing production provides a foundation for

growth, near-term development opportunities add additional production, and exploration provides the

potential to expand resources and extend mine lives.

BUILDING TOWARD INTERMEDIATE-PRODUCER SCALE

Goldgroup's strategy is to build on its newly expanded portfolio to establish a diversified precious-metals

company with increasing production, a growing resource base and multiple avenues for organic and inorganic

growth.

The combined portfolio now includes:

Two producing gold mines – Don David in Oaxaca and Cerro Prieto in Sonora; San Francisco, a formerly

producing open-pit gold mine in Sonora with substantial existing resources and infrastructure that is being

studied for a potential restart of mining operations; and Back Forty, a VMS gold/silver development project in

Michigan.

The Company believes this combination creates a compelling platform for growth by bringing together current

production, cash flow, near-term restart potential, advanced development and substantial exploration upside

within a single company.

MARKETING SERVICES AGREEMENT

Goldgroup has entered into an arm’s-length consulting services agreement, effective as of August 31, 2026,

with First Globe Capital International Inc. (“FGC”) of Vancouver, British Columbia, to support Goldgroup’s

investor outreach program. The Contractor is wholly owned by Mr. Anish Sunderji (the “Principal”). The term

of the agreement is 12 months, unless the Company elects to renew it. The agreement is also subject to the

acceptance of the TSX Venture Exchange (the “TSXV”).

As compensation for the services provided by FGC pursuant to this agreement, the Company shall grant the

Principal 500,000 stock options in accordance with the Company’s omnibus equity incentive plan and the

policies of the TSXV and the NYSE American and pay the Contractor a monthly cash retainer of

CAD$5,000.00.

FGC is a capital markets advisory and investor relations firm that assists public issuers with investor

outreach, marketing initiatives, roadshows, and introductions to potential investors. To the knowledge of the

Company, FGC and the Principal are arm's length to the Company and currently do not own any securities of

the Company, nor do they have any right or intent to acquire such securities, except as may be acquired

through normal market transactions.

QUALIFIED PERSON

The scientific and technical information contained in this news release was prepared under the supervision

of and has been reviewed and approved by Christopher Richings, P .Eng, Vice President Technical Services of

Goldgroup Mining Inc., a Qualified Person as defined by National Instrument 43-101. Mr. Richings is an

employee of the Company and is not independent of the Company.

On behalf of the Board of Directors

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"Javier Reyes"

Javier Reyes, Chairman and CEO

For more information:

+1 (604) 306-6867

410 – 1111 Melville St.

Vancouver, BC, V6E 3V6

www.goldgroupmining.com

[email protected]

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies

of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this press release.

NON-IFRS PERFORMANCE MEASURES

This news release discloses average realized price per ounce, which is a non-IFRS financial measures. The

measure is calculated by dividing the net consolidated gold sales by the consolidated gold ounces sold. The

measure is calculated on a consistent basis for the periods presented on a consolidated basis. Average

realized price per ounce statistics are intended to provide additional information only, do not have any

standardized meaning prescribed by IFRS and should not be considered in isolation or as a substitute for

measures of performance prepared in accordance with IFRS. The measures are not necessarily indicative of

operating profit or cash flow from operations as determined under IFRS. Other companies may calculate

these measures differently.

The following table provides a reconciliation between non-IFRS average realized price per ounce to the most

directly comparable IFRS measure for the three and six months ended June 30, 2026:

ABOUT GOLDGROUP MINING INC.

Goldgroup Mining Inc. is a precious-metals producer and growth-oriented mining company with four 100%-

owned assets across Mexico and the United States.

The Company owns and operates the Don David Gold Mine in Oaxaca, Mexico and the Cerro Prieto Gold Mine

in Sonora, Mexico, while advancing the San Francisco Gold Project in Sonora toward a potential production

restart and the Back Forty Project in Michigan toward development.

Three months ended June 30, Six months ended June 30,

2026 2025 2026 2025

Gold sales revenue (Denominated in ‘000 USD) $ 21,031 $

5,31

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$ 41,998 $ 9,825

Ounces of gold sold 4,748 1,588 8,996 3,190

Average realized price ($/oz) $ 4,429 $ 3,348 $ 4,669 $ 3,080