Mr. Jason Barnard reports

RIO GRANDE RESOURCES ANNOUNCES CLOSING OF OVER-SUBSCRIBED NON-BROKERED PRIVATE PLACEMENT FOR $2.55 MILLION

Rio Grande Resources Ltd., further to its news release dated Aug. 7, 2026, has closed its previously announced non-brokered private placement for gross aggregate proceeds of $2,546,500 through the issuance of 12,732,500 units of the company at a price of 20 cents per unit.

Each unit consisted of one common share and one transferable common share purchase warrant. Each warrant entitles the holder to purchase one additional share of the company at a price of 40 cents per share for a period of two years from the date of issuance.

The net proceeds will be allocated toward exploration activities and for general corporate purposes. Fees of $141,510 were paid and 707,550 finders' warrants issued to certain finders in connection with the private placement. Each finder's warrant is exercisable into one share for a period of two years after the date of issuance at an exercise price of 34 cents.

In accordance with the regulations of the Canadian Securities Exchange, all securities issued pursuant to the private placement will be subject to a hold period of four months and one day as required under applicable securities legislation.

About Rio Grande Resources Ltd.

Rio Grande Resources 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 a 100-per-cent interest in the Winston project group, which includes the two patented historic Ivanhoe and 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-sulphidation epithermal setting.

We seek Safe Harbor.