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GR Silver Mining Strengthens Management Structure and Provides Corporate Update

Management Changes

GR Silver Mining Strengthens Management

Structure and Provides Corporate Update

VANCOUVER, BC

,

June 30, 2025

/CNW/ -

GR Silver Mining Ltd.

("

GR Silver Mining

" or the

"

Company

") (TSXV: GRSL) (OTCQB: GRSLF) (FRANKFURT: GPE) – is very pleased to announce

the strengthening of its management structure by recognizing the contribution of the Company's team

in recent successes, including discovering new silver mineralization, resource growth, improved

financial condition, and positioning the Company for renewed growth.

Effective immediately, making use of experienced in-house mining executives, GR Silver Mining is

implementing a management restructure supporting plans to advance the Plomosas Silver Project in

Sinaloa, Mexico

. Advancement of the Plomosas Project is based on the upside resource potential at

the San Marcial Area and the recognition of synergies and opportunities available at the permitted

historical Plomosas Mine Site.

In

Vancouver

, Founder, President and Chief Operating Officer (COO)

Márcio Fonseca

will assume

the role of President and Chief Executive Officer.

Eric Zaunscherb

will assume the role of Executive

Chair of the Board of Directors. Mr. Fonseca has been highly successful in his mandate as COO,

delivering a resource update for the Plomosas Project on time and exceeding published expectations

in

March 2023

(see

news release

dated

March 20, 2023

). Over the last few years, the geological

team headed by Mr. Fonseca has fine-tuned the geological model at San Marcial leading to the SE

Area discovery with a highlight intersection in Hole SMS22-10 of

101.6 m

averaging 308 g/t Ag.

More recently, three new proximal target areas have been identified for follow up drilling featuring

similar geological, geochemical and geophysical signatures to San Marcial. Mr. Fonseca has also

been fundamental in the Company's initiatives to improve its financial condition through corporate

improvements in 2024.

Mr. Zaunscherb assumed the role of CEO in

February 2022

to allow Mr. Fonseca to focus on

delivering continued resource expansion on the wholly owned, highly prospective Plomosas Project

and to support operations and business enhancement in

Mexico

. In late 2023, GR Silver Mining

management commenced initiatives to improve its financial condition and to position the Company for

renewed growth. Positive corporate improvements through 2024 placed GR Silver Mining on track

for a return to active exploration in 2025. Our corporate successes included the sale of a non-core

asset, elimination of the Company's working capital deficit, compensation from a third party for a

historical environmental impasse, a significant uplift in the Company's share price, and strengthened

leadership through the recruitment of new directors.

Effective

June 25

,

Alejandro Cano Cabello

has been promoted from General Manager to Vice

President of Operations,

Mexico

. With over two decades of experience in the Mexican mining sector,

Mr. Cano is a mining and metallurgical engineer who has held senior roles at Fortuna Mining's San

Jose Mine, First Majestic's Del

Toro Silver Mine

, and Americas Gold and Silver's Cosala Operations,

among many other successful silver operations in

Mexico

. He brings a wealth of experience to

support GR Silver Mining's growth in

Mexico

. He is highly regarded in the Mexican mining industry,

being a member of the Asociación de Ingenieros de Minas, Metalurgistas y Geólogos de México.

His role on the National Executive Board of the Colegio de Ingenieros de Minas, Metalurgistas y

Geólogos de México, A.C. (

www.cimmgm.org

) reflects his extensive development and operational

experience as well as essential regulatory contacts throughout the country.

Luis Coto

has been promoted from Exploration Manager to Vice President, Exploration. He played

a key role in discovering the wide, high-grade silver-mineralized breccia at San Marcial, contributing

significantly to the Company's resource growth. Mr. Coto has gained extensive exposure to various

geological settings and mineralized silver-gold epithermal systems, gold-copper porphyries, and

skarn deposits. His expertise spans district-scale exploration studies, as well as design,

management, and execution of multi-million-dollar drilling programs supporting resource expansion.

In

Mexico

, he participated in the discovery of Fortuna Mining's San Jose Mine, and in

Peru

, he led

the team that defined the world-class

Mina Justa

copper-gold deposit for Minsur.

Gerardo Cicilia Calnacasco

has been promoted to Controller,

Mexico

. He is an accountant with a

Master's Degree in Finance and has over two decades of financial experience in the industrial sector

in

Mexico

. After 14 years working in the manufacturing-oil sector, he transitioned to the mining

industry where he has spent the last 14 years working in a range of accounting and financial roles at

multiple mine operations in

Mexico

. His senior accounting and financial roles at Endeavour Silver's

Guanacevi Mine, First Majestic's San Dimas Mine, and Nyrstar Mining's

Campo Morado Mine

have

created a strong knowledge of cost accounting and budgeting. His leadership over the past two

years at GR Silver Mining has been greatly appreciated.

Eric Zaunscherb commented, "I am excited to see GR Silver Mining repositioned and ready to

advance its 2025 strategic initiatives to deliver value on behalf of its shareholders. I am confident

that Márcio will continue to uncover the extraordinary potential of the Plomosas Silver Project, and I

look forward to supporting him in this goal in my new role, assisting in communicating the Company's

exciting investment proposition and attracting the resources he and his team need to execute the

business plan."

Márcio Fonseca added, "The success GR Silver Mining has achieved to date in consolidating a

district-scale silver asset, discovering wide high-grade silver mineralization, and positioning the

Company for continued resource growth and potential development in

Mexico

is the result of a

strong team effort and shared commitment to our vision. I would like to thank all employees who

have contributed to this journey so far. I am excited about the strengthening of our team, the ongoing

drilling program at San Marcial, and the potential new developments at the Plomosas Mine. All these

activities are advancing the Company toward responsible and sustainable growth."

GR Silver Mining is

continuing its drill program in the San Marcial Area

, recently expanded to up

to 3,000 meters, with three drill rigs currently active on site. The program is focused on three target

areas located near the existing NI 43-101 resource estimate as noted in the

March 2023

news

release. This step-out drilling campaign includes a combination of shallow and deep drill holes,

designed to define new near-surface mineralized zones and test down-plunge extensions of

previously successful underground drilling, such as the intersections of

18 m

averaging 773 g/t Ag

including

5.6 m

averaging 1,792 g/t Ag (Hole SMI21-03) and

38 m

averaging 299 g/t Ag including

3.5

m

averaging 1,002 g/t Ag (Hole SMI21-04).

Management continues third-party discussions to advance the commencement of a Bulk

Sampling Test Mining program at the permitted, past-producing Plomosas Mine.

This initiative

will consider both existing and potential new infrastructure, while also evaluating strategic

opportunities to achieve critical mass in the Mexican silver mining industry. A similar concept was

successfully implemented by the Company at the historic San Juan Mine. The program yielded

valuable incremental knowledge related to high-grade modeling and targeting, grade reconciliation,

and mineral deposit modeling to define new drill targets. From January to

September 2024

, 20,620 t

of material were mined and 20,430 t milled by private local operators. A total of 420 t (dry) of lead

concentrate were sold, averaging 10.43% Pb, 8,357 g/t Ag, and 8.19 g/t Au.

Pursuant to the Company's Omnibus Equity Incentive Plan, the Company has granted

incentive

stock options

to purchase up to 750,000 common shares (the "

Options

") to officers of the

Company on joining senior management. The Options will vest on the date of grant. The Options are

exercisable at

$0.175

per share for a period of five years from the date of grant and are subject to

the policies of the TSX Venture Exchange.

About GR Silver Mining Ltd

.

GR Silver Mining is a Canadian-based,

Mexico

-focused junior mineral exploration company engaged

in cost effective silver-gold resource expansion on its 100%-owned assets, located on the eastern

edge of the Rosario Mining District, in the southeast of Sinaloa State,

Mexico

. GR Silver Mining

controls 100% of the Plomosas Project, including the former Plomosas underground mine and wide,

high-grade silver mineralized zones at the San Marcial Area. Recent discoveries in the 78 km

2

of

highly prospective advanced stage exploration concessions, position the Company well in the pursuit

for resource expansion at the Plomosas Project.

GR Silver Mining Ltd.

Márcio Fonseca, President & CEO

Cautionary Statement Regarding Forward-Looking Information

This press release contains "forward-looking statements" within the meaning of applicable

Canadian securities legislation and information that are based on the beliefs of management and

reflect the Company's current expectations. When used in this press release, the words "estimate",

"project", "belief", "anticipate", "intend", "expect", "plan", "predict", "may" or "should" and the

negative of these words or such variations thereon or comparable terminology are intended to

identify forward-looking statements and information. Such statements and information reflect

the current view of the Company. Risks and uncertainties may cause actual results to differ

materially from those contemplated in those forward-looking statements and information. By their

nature, forward-looking statements involve known and unknown risks, uncertainties and other

factors which may cause our actual results, performance or achievements, or other future events,

to be materially different from any future results, performance or achievements expressed or

implied by such forward-looking statements.

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.

SOURCE

GR Silver Mining Ltd.

View original content to download multimedia:

http://www.newswire.ca/en/releases/archive/June2025/30/c0892.html

%SEDAR: 00040149E

For further information:

For further information, please contact: Telephone: 236-270-2057, Email:

[email protected]

CO: GR Silver Mining Ltd.

CNW 07:30e 30-JUN-25