VANCOUVER, BC / ACCESS Newswire / August 25, 2025 / Rio Grande Resources Ltd. (CSE:RGR)(OTCQB:RGRLF) ("Rio Grande" or "RIO" the "Company"), is pleased to announce that it has entered into a strategic agreement (the "Agreement") with Existing Agency Inc ("Existing") an arms-length independent contractor, to advance the Company's branding and digital strategy initiatives. Under the engagement, Existing will be paid a fee of $4,000 per month (the "Services") effective August 25, 2025, for a six-month term unless either party provides written notice of termination to the other party sixty (60) days prior to the date of termination.

Existing is a creative and digital agency dedicated to fueling innovation, impact, and influence. As collaborative media strategists and brand builders, it combines visionary creativity with data-driven insights to craft impactful solutions across social media management, content creation, paid amplification, design, branding, video production, and web development. From mining companies to consumer-packaged goods brands, it works seamlessly across sectors to bring ideas to life through strategy-backed storytelling. With an in-house team handling everything from audience research and community growth to video production and website delivery, it empowers brands to connect meaningfully, engage effectively, and grow sustainably.

Pursuant to the Agreement, there is no performance obligations contained in the Agreement and Existing will not receive common shares, stock options or any form of equity in the Company as compensation. Existing is an IIROC regulated dealer and a leading provider of financial services to the global mining sector, with headquarters in Toronto, Canada and can be reached at Existing Agency Inc., 1400 - 120 Adelaide St West, Toronto, Ontario, M5H 1T1. Telephone: 1 (647) 215-6243 cass@weareexisting.com. Learn more at WeAreExisting.com.

Effective August 31, 2025, Rio Grande also announces that it has mutually agreed to terminate its investor relations agreement with MZHCI, LLC ("MZ"), announced on February 27, 2025, by providing 60 days' notice. The Company sincerely thanks MZ for its valuable support during its uplisting process and during its engagement with the Company.

Manager of Corporate Communications Appointment

The Company is pleased to announce it has also appointed Caroline Klukowski as Manager of Corporate Communications. Caroline brings over 20 years of experience in guiding public companies across the mining, environmental technologies, cannabis, and blockchain sectors. Her extensive background in corporate communications, investor relations, and marketing will support Rio Grande's ongoing efforts to strengthen stakeholder engagement and market visibility.

Pursuant to Ms. Klukowski's appointment the Company has granted 15,000 fully vested stock options exercisable at $ .345 for a period of 3-years and 10,000 RSUs subject to vesting provisions. All stock options and RSUs issued are subject to a statutory hold period of four months and one day and have been granted in accordance with the Company's Omnibus Stock Incentive Plan dated December 20, 2024, and the policies of the Canadian Securities Exchange.

About Rio Grande Resources

Rio Grande Resources (CSE:RGR) is a burgeoning mineral exploration company focused on unlocking the high-grade gold and silver potential within its 3,000-acre drill-ready property in the Black Range of Sierra County, New Mexico. The company holds 100% interest in the Winston project group, which includes the 2 patented historic Ivanhoe & Emporia Claims, and Little Granite mines, all known for their past production of high-grade precious metals. Rio Grande Resources is led by a team of experienced professionals with expertise in mineral exploration and development, who are targeting large-scale precious metal discoveries within the property's well-documented low-sulfidation epithermal setting.

To view the company fact sheet and corporate presentation, please visit our website at www.riogranderesources.ca

Contact and Information

Company
Jason Barnard, President CEO and Director
(604) 767-6598
jason.barnard@riogranderesources.ca

Corporate Communications Contact
Caroline Klukowski
ck@riogranderesources.ca
604.763.8730

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Forward-Looking Statements

Except for the statements of historical fact contained herein, the information presented in this news release and oral statements made from time to time by representatives of the Company are or may constitute "forward-looking statements" as such term is used in applicable United States and Canadian laws and including, without limitation, within the meaning of the Private Securities Litigation Reform Act of 1995, for which the Company claims the protection of the safe harbor for forward-looking statements. Such forward-looking statements and forward-looking information include, but are not limited to, the proposed benefits of the Arrangement. These statements relate to analyses and other information that are based on forecasts of future results, estimates of amounts not yet determinable and assumptions of management. Any other statements that express or involve discussions with respect to predictions, expectations, beliefs, plans, projections, objectives, assumptions or future events or performance (often, but not always, using words or phrases such as "expects" or "does not expect," "is expected," "anticipates" or "does not anticipate," "plans," "estimates" or "intends," or stating that certain actions, events or results "may," "could," "would," "might" or "will" be taken, occur or be achieved) are not statements of historical fact and should be viewed as forward-looking statements. Such forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of the Company to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Such risks and other factors include, among others, the availability of capital to fund programs and the resulting dilution caused by the raising of capital through the sale of shares, continuity of agreements with third parties, the satisfaction of the conditions to the Arrangement, risks and uncertainties associated with the environment and delays in obtaining governmental approvals, permits or financing. Although the Company has attempted to identify important factors that could cause actual actions, events or results to differ materially from those described in forward-looking statements, there may be other factors that cause actions, events or results not to be as anticipated, estimated or intended. There can be no assurance that such statements will prove to be accurate as actual results and future events could differ materially from those anticipated in such statements. Although the Company believes that the expectations reflected in such forward-looking statements are based upon reasonable assumptions, it can give no assurance that its expectations will be achieved. Forward-looking information is subject to certain risks, trends and uncertainties that could cause actual results to differ materially from those projected. Many of these factors are beyond the Company's ability to control or predict. Important factors that may cause actual results to differ materially and that could impact the Company and the statements contained in this news release can be found in the Company's filings on SEDAR+. The Company assumes no obligation to update or supplement any forward-looking statements whether as a result of new information, future events or otherwise. Accordingly, readers should not place undue reliance on forward-looking statements contained in this news release and in any document referred to in this news release. This news release shall not constitute an offer to sell or the solicitation of an offer to buy securities. Please refer to the Company's most recent filings under its profile on SEDAR+ at www.sedarplus.ca for further information respecting the risks affecting the Company and its business.

The CSE has neither approved nor disapproved the contents of this news release and accepts no responsibility for the adequacy or accuracy hereof.

SOURCE: Rio Grande Resources