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Algo Grande Appoints Monica Ospina as ESG Advisor and Advances Digbee ESG Disclosure Submission

Marketing Announcement Corporate Updates

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Algo Grande Appoints Monica Ospina as ESG Advisor and

Advances Digbee ESG Disclosure Submission

VANCOUVER, BC – June 4, 2026 – Algo Grande Copper Corp. (“Algo Grande” or the

“Company”) (TSX-V: ALGR | OTC: ALGRF | FRA: KM00) announces the appointment

of Monica Ospina as ESG Advisor to the Company, further strengthening Algo Grande’s

commitment to responsible resource development, stakeholder engagement and long-

term sustainability initiatives.

Ms. Ospina brings extensive experience in ESG strategy, external affairs, governance,

government and Indigenous relations, geopolitical risk and critical minerals development

across the Americas. Her work has focused on advancing responsible mining initiatives,

strengthening stakeholder engagement frameworks and supporting sustainable supply

chain strategies tied to the global energy transition.

Ms. Ospina’s career has focused on embedding responsible mining principles into projects

from the early stages of exploration, with expertise in governance, socio-economic

inclusion, ESG disclosure frameworks, and stakeholder engagement as key pillars in the

development of critical minerals for the energy transition. Her work has been recognized

across the industry through her role as founder of O Trade, a socio-economic consultancy

firm; her position as Social Performance Advisor for the Americas at Rio Tinto; her

contribution to the IFC/World Bank Early Stakeholder Engagement Guideline for mineral

projects; and her recognition in the WIM100 2022, which highlights leading women shaping

the global mining industry.

In conjunction with Ms. Ospina’s appointment, Algo Grande is also pleased to announce

that the Company is in the final stages of completing its inaugural ESG disclosure

submission through the Digbee ESG Platform, a mining-focused ESG disclosure and

assessment framework utilized by mining companies, investors and industry stakeholders

globally.

Digbee ESG is a mining-specific ESG disclosure and ratings platform designed to help

mining companies measure, manage and communicate ESG performance using

standardized frameworks aligned with major global ESG standards and investor

expectations. The platform is widely used within the mining industry to improve

transparency, strengthen ESG governance and support responsible project development.

Digbee’s framework is specifically designed for mining companies and incorporates

independent expert assessment methodologies intended to support comparability and

credibility across the sector.

Enrico Gay, CEO of Algo Grande Copper, commented: “Responsible development and

strong stakeholder engagement are core priorities for Algo Grande as we continue

advancing the Adelita Project. We are grateful for the positive community relationships

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already established at Adelita, but our objective is to go beyond the minimum

requirements typically associated with project development and land use agreements.

“Our philosophy is centered on creating a true win-win strategy for all stakeholders

involved. I am confident Monica’s experience in ESG, governance and stakeholder

engagement will help strengthen this vision as Algo Grande continues building a modern

copper development company focused on responsible growth and long-term value

creation.”

Ms. Ospina commented: “The mining industry plays a critical role in the global energy

transition and the development of resilient critical mineral supply chains. What drew me to

Algo Grande is the Company’s commitment to embedding responsible mining principles

from the earliest stages of project development, sending a strong signal to shareholders,

stakeholders, and communities that ESG performance will be proactively managed and

that progress toward operational readiness will be grounded in trust and long-term value

creation. I look forward to supporting the development of the Adelita Project.”

Investor Relations and Consulting Agreements

Algo Grande is additionally pleased to announce amendments to the following investor

relations and consulting agreements.

Fairfax Partners

On December 18, 2025, the Company issued a news release announcing, among others, a

services agreement (the “Fairfax Agreement”) with Fairfax Partners (“Fairfax”), a British

Columbia based company. The Fairfax Agreement has an initial term of 6 months,

following the initial term the Fairfax Agreement shall continue on a month-to-month basis,

unless terminated by either party. Pursuant to the Fairfax Agreement, among other

consideration, Algo Grande shall pay Fairfax a monthly fee of $5,000, to be paid on the first

day of each month.

On March 12, 2026, the Company and Fairfax entered into an amendment to the Fairfax

Agreement (the “Fairfax Amendment”). Pursuant to the Fairfax Amendment, the parties

agreed to increase the monthly fee from $5,000 to approximately $8,500 per month. All

other material terms and conditions of the Fairfax Agreement remain unchanged and in full

force and effect. The Fairfax Agreement, as amended by the Fairfax Amendment, remains

subject to approval from the TSX Venture Exchange (“TSXV”).

Fairfax and Algo Grande are not related parties and operate at arm's length. Neither Fairfax

nor its principals have any interest in Algo Grande's securities, directly or indirectly, or any

right or intent to acquire such an interest.

Rayleigh Capital Ltd.

On March 19, 2026, the Company announced an investor relations and corporate

communications agreement (the “ Rayleigh Agreement ”) with Rayleigh Capital Ltd.

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(“Rayleigh”). Pursuant to the Rayleigh Agreement, among other consideration, the

Company was required to grant 200,000 stock options (the “Options”) to Rayleigh, subject

to the Company's equity incentive plan and all necessary regulatory approvals, including

approval of the TSX V.

Algo Grande would like to clari fy the Options granted pursuant to the Rayleigh Agreement

were part of the option grants announced on April 16, 2026. The Options are exercise for one

common share at an exercise price of $0.65 for a period of three years from the date of grant.

50% of the Options will vest six months after grant, and the remaining 50% will vest six

months thereafter.

For additional details on the Rayleigh Agreement, please refer to Algo Grande’s news release

dated March 19, 2026.

Insight Capital Partners

The Company entered into a Capital Markets Consulting Agreement (the “ Insight

Agreement”) effective as of March 5, 2026, with Insight Capital Partners Inc. (“ Insight”),

located in Toronto, Ontario, Canada. Pursuant to the Insight Agreement, Insight will provide

certain services to the Company including research and marketing information on trading

activity and advising the Company on market related initiatives. The In sight Agreement has

a term ending 24 months from the effective date. Either party may terminate the Ins ight

Agreement with 30 days’ written notice, on and after the date that is four months after the

effective date. In consideration for their services, Algo Grande will pay Insight a monthly fee

of $3,500 plus HST, payable out of the Company’s existing cash on hand. The Insight

Agreement is subject to approval by the TSXV

Insight and the Company are not related parties and operate at arm’s length. Insight is a

closely controlled Canadian corporation. Neither Insight nor its principals have any interest

in the Company’s securities, directly or indirectly, or any right or intent to acquire such an

interest.

Resource Stock Digest

The Company entered into an Awareness Campaign Service Agreement (the “ RSD

Awareness Agreement”), effective as of June 1st, 2026, with Resource Stock Digest (“RSD”),

under the terms of which RSD will conduct interviews and generate reports on the Company

and will distribute to the RSD existing database. The RSD Awareness Agreement has a term

of 2 months. In consideration for the services, the Company will pay a fee of US $50,000. The

RSD Awareness Agreement is subject to approval by the TSXV .

The Company also entered into a Featured Company Sponsorship Service Agreement (the

“RSD Sponsorship Agreement”), effective as of June 1st, 2026, with RSD, under the terms

of which RSD will dedicate a Company page on the RSD website, where they will post

recurring management interviews and press releases to the RSD website. The RSD

Sponsorship Agreement has a term of 12 months. In consideration for the services, the

Company will pay a one tim e fee of US $8,500, plus US$2,450 per month. The RSD

Sponsorship Agreement is subject to approval by the TSXV .

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RSD and the Company are not related parties and operate at arm’s length RSD is owned and

operated by Nicholas Hodge and Gerardo De Real and headquartered in Round Rock, Texas,

USA. Neither RSD nor its principals have any interest in the Company’s securities, directly or

indirectly, or any right or intent to acquire such an interest.

About Algo Grande Copper Corp.

Algo Grande Copper Corp. is a growth-focused mineral exploration company advancing

the Adelita Project, a district-scale, multi-system copper-silver-gold opportunity

positioned in the prolific Arizona-Sonora copper belt.

Algo Grande is dedicated to unlocking the full mineral potential of this under-explored

corridor through disciplined data-driven exploration, technical excellence, and a firm

commitment to value creation for shareholders. The 5,895-hectare Adelita Project is

anchored by the high-grade Cerro Grande Cu-Ag-Au skarn discovery, which exhibits strong

continuity along a defined corridor extending over 6 kilometers. Reprocessing of legacy

geophysical data and field mapping indicate the presence of a potential porphyry system

at depth, suggesting a classic skarn-porphyry mineralization model similar to major

deposits found throughout northwestern Mexico.

ON BEHALF OF ALGO GRANDE COPPER CORP.

Enrico Gay

Chief Executive Officer

For more information, please contact:

E-mail: [email protected]

Website: www.algo-grande.com

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 RELEASE.

Cautionary Statement on Forward-Looking Information

This news release contains statements and information that, to the extent that they are not

historical fact, constitute “forward- looking information” within the meaning of applicable

securities legislation. Forward- looking information is based on the reasonable assumptions,

estimates, analysis and opinions of management made in light of its experience and its perception

of trends, current conditions and expected developments, as well as other factors that management

believes to be relevant and reasonable in the circumstances at the date that such statements are

made, but which may prove to be incorrect. Forward- looking information involves known and

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unknown risks, uncertainties and other factors that may cause the actual results, performance or

achievements of the Algo Grande to differ materially from any future results, performance or

achievements expressed or implied by the forward-looking information, including, but not limited

to, statements relating to the Company’s exploration plans including the planned Phase II drilling

program, results of surveys and the geochemical sampling program, approval of certain

agreements listed in this news release by the TSXV and those listed in filings made by Algo Grande

with the Canadian securities regulatory authorities (which may be viewed at www.sedarplus.ca).

Accordingly, readers should not place undue reliance on any such forward- looking information.

Further, any forward -looking statement speaks only as of the date on which such statement is

made. New factors emerge from time to time, and it is not possible for Algo Grande’s management

to predict all of such factors and to assess in advance the impact of each such factor on Algo

Grande’s business or the extent to which any factor, or combination of factors, may cause actual

results to differ materially from those contained in any forward- looking statements. Algo Grande

does not undertake any obligation to update any forward- looking information to reflect

information, events, results, circumstances or otherwise after the date hereof or to reflect the

occurrence of unanticipated events, except as required by law including securities laws.