In-fill RC Drilling at Kamperman Confirms High-Grade Gold

Rio Silver Inc. ("Rio Silver" or the "Company") (TSX.V: RYO,OTC:RYOOD) (OTC: RYOOF) announces that, further to the announcements on March 26 and June 25, 2025 (collectively, the "Prior Announcements"), it has amended terms of the acquisition (the "Transaction") from Peruvian Metals Corp. ("Peruvian") of the Maria Norte Project (the "Property") located in the District of Huachocopla, Huancavelica Peru.

Subject to applicable regulatory and other approvals including that of the Exchange, the amended terms of the Transaction with Peruvian include: (1) the elimination of the net smelter royalty to Peruvian; (2) the adjusted number of payment securities to be issued to Peruvian, which are now 3,000,000 shares of Rio Silver and 1,000,000 share purchase warrants of Rio Silver (on account of the recent 5:1 consolidation of the shares of Rio Silver, completed on July 3, 2025), with each share purchase warrant exercisable at $0.15 per share for a period of two years from the date of Exchange approval; and (3) payment by Rio Silver to Peruvian in the amount of US$22,500, with all other terms of the Transaction remaining unchanged. For further clarity, the semiannual payments of US$25,000 to Peruvian in the aggregate amount of US$250,000 will remain as "Option Payments", given the elimination of the net smelter royalty.