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RIO2 Announces Upsize of Previously Announced Bought Deal Financing to C$166 Million

Financings

RIO2 ANNOUNCES UPSIZE OF PREVIOUSLY ANNOUNCED BOUGHT DEAL FINANCING TO

C$166 MILLION

NOT FOR DISTRIBUTION TO UNITED STATES NEWS WIRE SERVICES OR FOR

DISSEMINATION IN THE UNITED STATES

For Immediate Release

December 8, 2025

VANCOUVER, BC – Rio2 Limited (“Rio2” or the “Company”) (TSX: RIO; OTCQX: RIOFF; BVL: RIO)

is pleased to announce that due to strong investor demand, the Company, Raymond James Ltd. ,

(“Raymond James”), Stifel Nicolaus Canada Inc. (“Stifel”), and BMO Nesbitt Burns Inc. (“BMO”), the

co-lead underwriters and joint bookrunners (collectively, the “Underwriters”) have upsized the

previously announced “bought deal” financing from C$140 million to approximately C$166 million, or

approximately US$120 million (the “Equity Financing”). Under the Equity Financing, the Underwriters

have agreed to purchase, on a “bought deal” basis, 74,865,000 Subscription Receipts of the Company

(“Subscription Receipts”) at a price of $2 .22 per Subscription Receipts (the “Issue Price”) for gross

proceeds of C$166,200,300.

The Company has granted the Underwriters an over-allotment option (the “Over-Allotment Option”),

exercisable in whole or in part, at any time, and from time to time, for a period of 30 days following the

Closing Date, to purchase at the Issue Price up to such number of additional Subscription Receipts as

is equal to 15% of the number of Subscription Receipts sold pursuant to the Offering. The Underwriters

can elect to exercise the Over -Allotment Option to cover over -allotments, if any, and for market

stabilization purposes.

Other than the increase in the size of the Equity Financing, all other terms remain unchanged following

the Amendment.

The Equity Financing is expected to close on or about December 15, 2025, subject to certain

customary closing conditions, including the receipt of all necessary approvals from the TSX.

About Rio2 Limited

Rio2 is a mining company with a focus on development and mining operations with a team that has

proven technical skills as well as a successful capital markets track record. Rio2 is focused on taking

its Fenix Gold Project in Chile to production in the sho rtest possible timeframe based on a staged

development strategy. Rio2 and its wholly owned subsidiary, Fenix Gold Limitada, are companies with

the highest environmental standards and responsibility with the firm conviction that it is possible to

develop mining projects that respect the three pillars (Social, Environment, Economics) of responsible

development. As related companies, we reaffirm our commitment to apply environmental standards

beyond those that are mandated by regulators, seeking to protect and preserve the environment of

the territories that we operate in.

To learn more about Rio2 Limited, please visit: www.rio2.com or Rio2's SEDAR+ profile at

www.sedarplus.ca.

ON BEHALF OF THE BOARD OF RIO2 LIMITED

Alex Black

Executive Chairman of the Board

Email: [email protected]

Tel: +51 99279 4655

Kathryn Johnson

Executive Vice President, CFO & Corporate Secretary

Email: [email protected]

Tel: +1 604 762 4720

Forward-Looking Information

This news release contains forward-looking statements and forward-looking information (collectively

“forward-looking information”) within the meaning of applicable securities laws relating to the

Transaction, the operations of the Condestable Mine and its potential expansion, expansion of the

Fenix Gold Project, and other aspects of Rio2’s future operations, strategy and plans. Without limiting

the generality of the foregoing, this news release contains forward- looking information pertaining to

the followin g: the completion of the Transaction and the timing thereof; the expected benefits,

synergies and strategic positioning resulting from the Transaction (including diversification, cash flow

to support growth, minimal share dilution, accretion across key per-share metrics, and strong internal

rate of return); the completion of the Equity Financing; the use of proceeds from the Equity Financing;

approvals of the TSX with respect to the Equity Financing, and other matters ancillary or incidental to

the foregoing.

All statements included herein, other than statements of historical fact, may be forward -looking

information and such information involves various risks and uncertainties. Forward-looking information

is often, but not always, identified by the use of words such as “seek”, “anticipate”, “plan”, “continue”,

“estimate”, “expect”, “may”, “will”, “project”, “predict”, “potential”, “targeting”, “intend”, “could”, “might”,

“should”, “believe” and similar expressions. The forward-looking information is based on cer tain key

expectations and assumptions made by Rio2’s management, including but not limited to: expectations

concerning prevailing commodity prices (including copper and gold prices), exchange rates, interest

rates, applicable royalty rates and tax laws; capital efficiencies; legislative and regulatory environment

of Chile and Peru; future mining and production rates and estimates of capital and operating costs for

both the Fenix Gold Project and Condestable Mine; expectations regarding the availability of d ebt

financing and completion of the Equity Financing and the Private Placement; estimates of reserves

and resources at both properties; anticipated timing and results of capital expenditures and expansion

projects; the sufficiency of capital expenditures in carrying out planned activities; results of operations

and performance; the successful completion of the Transaction in accordance with the terms of the

Agreement; the availability and cost of financing, labor and services; Rio2’s ability to access capit al

on satisfactory terms; the integration of Condestable operations; the realization of expected synergies

and benefits from the Transaction; the receipt of all regulatory and exchange approvals for the

Transaction and the satisfaction of closing conditions for the Transaction.

Rio2 believes the expectations reflected in these forward-looking statements are reasonable, but no

assurance can be given that these expectations will prove to be correct and such forward -looking

statements in this news release should not be unduly relied upon. A description of assumptions used

to develop such forward- looking information and a description of risk factors that may cause actual

results to differ materially from forward- looking inform ation can be found in Rio2's disclosure

documents on the SEDAR+ website at www.sedarplus.ca. These risks and uncertainties include, but

are not limited to: risks and uncertainties relating to the completion of debt and equity financings for

the Transaction; risks relating to the completion of the Transaction, including the satisfaction of closing

conditions and receipt of regulatory approvals; risks associated with the integration of Condestable

operations; risks relating to copper price volatility and market conditions; operational risks at the

Condestable Mine; risks associated with mining operations in Peru; risks relating to the Vendor Debt

arrangements and associated security interests; currency fluctuation risks; regulatory and permitting

risks in both Chile and Peru; and management’s ability to anticipate and manage the factors and risks

referred to herein.

Forward-looking statements included in this news release are made as of the date of this news release

and such information should not be relied upon as representing its views as of any date subsequent

to the date of this news release. Rio2 has attempted to identify important factors that could cause

actual results, performance or achievements to vary from those current expectations or estimates

expressed or implied by the forward -looking information. However, there may be other factors that

cause results, performance or achievements not to be as expected or estimated, and that could cause

actual results, performance or achievements to differ materially from current expectations. Rio2

disclaims any intention or obligation to update or revise any forward-looking statements, whether as a

result of new information, future events or otherwise, except as expressly required by applicable

securities legislation