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GPG.V ·

Grande Portage Retains Machai Capital for Marketing

Marketing Announcement

1050 - 1090 West Georgia Street

Vancouver, British Columbia. V6E 3V7

Grande Portage Retains Machai Capital for Marketing

Vancouver, British Columbi a — November 18 , 2025 – Grande Portage Resources Ltd. (TSXV: GPG)

(OTCQB: GPTRF) (FSE: GPB) (“ Grande Portage” or the “ Company”) is pleased to announce that it has

retained Machai Capital Inc. (“Machai”) to provide the Company with a range of digital marketing services.

Marketing Agreement

The Company has entered into an agreement with Machai dated November 17, 2025 (the “ Machai

Agreement”), pursuant to which Machai will lead the Company’s marketing, advertising, and public awareness

activities and deploy a comprehensive digital media marketing program including multi -platform digital

campaigns, social media amplification, and targeted investor communications.

Machai will provide digital marketing services with branding, content and data optimization to assist the

Company to create in -depth marketing campaigns, tracking, organizing and executing the services through

search engine optimization, search engine marketing, lead generation, digital marketing, social media marketing,

email marketing, and brand marketing. The services will be conducted in accordance with the applicable policies

of the TSX Venture Exchange (“TSXV”).

Machai has been engaged by the Company for a 4 month period commencing immediately. In consideration

for the services provided, the Company has paid Machai C$400,000 plus GST out of its general working capital

account. The Company has also granted stock options to purchase up to 500,000 common shares of the

Company to Machai, exercisable at a price of $0.25 per share until March 17, 2028 in accordance with the

Company’s stock option plan and applicable regulatory policies. The engagement of Machai is subject to the

approval of the TSXV.

Machai is a premier data analytics & direct awareness firm with an established track record in the North

American, European, and Asia -pacific markets and in the metals & mining, technology and special situations

sectors. Machai is arm’s -length to the Company, has no other relationship with the Company and neither

Machai nor its principal, Suneal Sandhu, has any interest, directly or indirectly, in the Company or its securities,

or any right or intent to acquire such an interest , other than as disclosed herein. Machai can be contacted

at [email protected] or at Suite 101, 17565 58 Ave, Surrey, B.C., V3S 4E3, Canada.

About Grande Portage:

Grande Portage Resources Ltd. is a publicly traded mineral exploration company focused on advancing the

New Amalga Mine project, the outgrowth of the Herbert Gold discovery situated approximately 25 km north

of Juneau, Alaska. The Company holds a 100% inte rest in the New Amalga property. The New Amalga gold

system is open to length and depth and is host to at least six main composite vein-fault structures that contain

1050 - 1090 West Georgia Street

Vancouver, British Columbia. V6E 3V7

- 2 -

ribbon structure quartz -sulfide veins. The project lies prominently within the 160km long Juneau Gold Belt,

which has produced over eight million ounces of gold.

The Company's updated NI#43 -101 Mineral Resource Estimate (MRE) reported at a base case mineral

resources cut-off grade of 2.5 grams per tonne gold (g/t Au) and consists of: an Indicated Resource of 1,438,500

ounces of gold at an average grade of 9.47 g/t Au (4,726,000 tonnes); and an Inferred Resource of 515,700

ounces of gold at an average grade of 8.85 g/t Au (1,813,000 tonnes), as well as an Indicated Resource of

891,600 ounces of silver at an average grade of 5.86 g/t Ag (4,726,000 tonnes); and an Infe rred Resource of

390,600 ounces of silver at an average grade of 7.33 g/t silver (1,813,000 tonnes). The MRE was prepared by

Dr. David R. Webb, Ph.D., P.Geol., P.Eng. (DRW Geological Consultants Ltd.) with an effective date of July

17, 2024.

ON BEHALF OF THE BOARD

"Ian Klassen"

Ian M. Klassen

President & Chief Executive Officer

Tel: (604) 899-0106

Email: [email protected]

Cautionary Statement Regarding Forward-Looking Information

This news release includes certain "forward -looking statements" under applicable Canadian securities

legislation. Forward-looking statements include estimates and statements that describe the Company's future

plans, objectives or goals, including words to the effect that the Company or management expects a stated

condition or result to occur. Forward -looking statements may be identified by such terms as "believes",

"anticipates", "expects", "estimates", "may", "could", "would", "will", or "plan". Such forwa rd-looking

statements include, but are not limited to, statements with respect to the services to be provided under the

Machai Agreement and receipt of all required regulatory approvals including TSXV approval of the Machai

Agreement. Since forward -looking statements are based on assumptions and address future events and

conditions, by their very nature they involve inherent risks and uncertainties as described in the Company's

filings with Canadian securities regulators. There can be n o assurance that such statements will prove to be

accurate, as actual results and future events could differ materially from those anticipated in such statements.

Accordingly, readers should not place undue reliance on forward-looking statements. The Company disclaims

any intention or obligation to update or revise any forward -looking information, whether as a result of new

information, future events or otherwise, other than as required by law.

Please note that under National Instrument 43 -101, the Company is required to disclose that it has not based

any production decision on NI 43 -101-compliant reserve estimates, preliminary economic assessments, or

feasibility studies, and historically production decisions made without such reports have increased uncertainty

and higher technical and economic risks of failure. These risks include, among others, areas that are analyzed

in more detail in a feasibility study or preliminary economic assessment, su ch as the application of economic

analysis to mineral resources, more detailed metallurgical and other specialized studies in areas such as mining

and recovery methods, market analysis, and environmental, social, and community impacts. Any decision to

place the New Amalga Mine into operation at levels intended by management, expand a mine, make other

production-related decisions, or otherwise carry out mining and processing operations would be largely based

on internal non-public Company data, and on reports based on exploration and mining work by the Company

and by geologists and engineers engaged by the Company.

NEITHER THE TSX VENTURE EXCHANGE NOR ITS REGULATION SERVICE PROVIDER (AS

THAT TERM IS DEFINED UNDER THE POLICIES OF THE EXCHANGE) ACCEPTS

RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS NEWS RELEASE.