15 OCTOBER, 2025 | VANCOUVER, BC

Tribeca Resources Upsizes Previously Announced Non-Brokered Private Placement to C$6.5 Million and Provides Clarification Regarding Prior Announcement

Tribeca Resources Corporation (TSXV: TRBC) (OTCQB: TRRCF) (“Tribeca Resources” or the “Company”) is pleased to announce that, due to strong investor demand, it has upsized its previously announced non-brokered private placement from up to 23,809,523 units of the Company (“Units”) for aggregate gross proceeds of up to $5,000,000, to up to 30,952,380 Units for aggregate gross proceeds of up to $6,500,000, at a price of $0.21 per Unit (the “Offering”). The Offering remains subject to a minimum aggregate subscription amount of $2,000,000 (the “Minimum Offering Amount”).

Each Unit will be comprised of one common share of the Company (each, a “Share”) and one-half of one common share purchase warrant (each whole warrant, a “Warrant”). Each Warrant will be exercisable by the holder thereof to acquire one additional Share (each, a “Warrant Share”, and together with the Units, Shares and Warrants, the “Securities") at an exercise price of $0.30 if exercised within the first 12 months following the Closing Date (as defined below) and $0.40 if exercised within the subsequent 12-month period, for a total exercise period of 24 months from the Closing Date; provided that: (i) the Warrants shall not be exercisable within the initial 60-day period following the Closing Date and (ii) the Company will have the right to accelerate the expiry of the Warrants in the event the Shares trade on the TSX Venture Exchange (the “TSXV”) (or any such other stock exchange in Canada as the Shares may trade at the applicable time) at a volume weighted average trading price ("VWAP") of C$0.50 or more per Share for a ten (10) consecutive trading day period.

Subject to compliance with applicable regulatory requirements, the Offering is being completed pursuant to the listed issuer financing exemption (“LIFE”) under Part 5A of National Instrument 45-106 – Prospectus Exemptions and in reliance on the Coordinated Blanket Order 45-935 – Exemptions from Certain Conditions of the Listed Issuer Financing Exemption. The Securities issued under the Offering will not be subject to a hold period in accordance with applicable Canadian securities laws. There is an amended and restated offering document (the “Amended Offering Document”) related to this Offering that can be accessed under the Company’s profile at www.sedarplus.ca and on the Company’s website at www.tribecaresources.com. Prospective investors should read this Amended Offering Document before making an investment decision.

The Company previously announced that it intended to use some of the gross proceeds of the Offering for exploration activities at the Company’s La Higuera project (the “La Higuera Project”) and the Jiguata Project (as defined below), and for general working capital purposes. The Company wishes to clarify that the gross proceeds of the Offering will only be used for exploration activities at the Jiguata Project if it: (i) raises more than the Minimum Offering Amount; and (ii) obtains the necessary regulatory approvals, including approval of the TSXV, to enter into the option to purchase 100% of the Jiguata Project. In the event that the Company does not obtain all necessary regulatory approvals or approval from the TSXV, the Company will use certain proceeds currently contemplated for the Jiguata Project for other purposes as further set out in the Amended Offering Document. There is no certainty that the Company will raise the Minimum Offering Amount or that it will obtain the necessary regulatory approvals, including approval of the TSXV, to enter into the option to purchase 100% of the Jiguata Project.

In connection with the Offering, the Company may, at its sole discretion, pay finder's fees consisting of: (i) Shares or cash in an amount equal to up to 6% of the gross proceeds raised in respect of the Offering from subscribers introduced by such finders to the Company; and (ii) finder’s warrants in an amount equal to up to 6% of the number of Shares issued pursuant to this Offering from subscribers introduced by such finders to the Company in accordance with applicable securities laws and the policies of the TSXV.

The closing of the Offering may be completed in one or more tranches and is expected to close by October 29, 2025 (the “Closing Date”). The closing of the Offering is subject to certain closing conditions, including the approval of the TSXV.

It is anticipated that certain directors and management of the Company (“Insiders”) will participate in the Offering. The participation of any insiders may be considered a “related party transaction” within the meaning of Multilateral Instrument 61-101 - Protection of Minority Security Holders in Special Transactions ("MI 61-101"). Such insider participation will be exempt from the formal valuation and minority shareholder approval requirements of MI 61-101 pursuant to sections 5.5(a), 5.5(b) and 5.7(1)(a) of MI 61-101, as the Company is not listed on any of the specified exchanges or markets outlined in subsection 5.5(b) of MI 61-101, and the fair market value of the Securities to be distributed to the insiders will not exceed 25% of the Company's market capitalization.

Jiguata Project Definitive Agreement and Due Diligence Period

As previously announced in the Tribeca Resources news releases dated June 19, 2025 and October 7, 2025, the Company signed a letter of intent (the “LOI”) to enter into an option to purchase a 100% interest in the Jiguata project, a 10,000 hectare exploration property located 120 km north of the Collahuasi copper-molybdenum mine in northern Chile (the “Jiguata Project”).  The LOI was amended on August 5, 2025, and September 30, 2025, to extend the Company’s due diligence period and the deadline to execute a definitive purchase option agreement by 15 days and 30 days, respectively, resulting in a new deadline of October 31, 2025, for the Company to execute a definitive purchase option agreement. The Company is continuing to work towards finalizing a definitive purchase option agreement in respect of the Jiguata Project, which it expects to complete on or before October 31, 2025; however, there is no guarantee that the Company will enter into a definitive purchase option agreement on the terms currently contemplated by the Company, or at all. The Company’s entry into the option to purchase a 100% interest in the Jiguata Project has not been approved by the TSXV as of the date hereof.

About Tribeca Resources

Tribeca Resources is a copper exploration company focused on discovering and developing copper assets in northern Chile. The Company’s management team, whose members are significant shareholders of the Company, has world-leading copper expertise including a discovery history with iron oxide copper-gold deposits in the world’s great IOCG Belts of the Carajás district in Brazil and the Gawler and Cloncurry provinces of Australia, and porphyry-copper project and business development experience in Papua New Guinea, the Philippines, Peru, Argentina and Chile.

Tribeca Resources’ objective is to provide the mineral resources for the next generation of copper mines in Chile. It is focused on building a portfolio of projects, with emphasis on mid to advanced-stage copper exploration and resource development projects. To this end, mineral targets are regularly assessed in pursuit of acquisition, strategic exploration and significant discovery.

Tribeca Resources’ flagship property is the La Higuera Project that comprises 4,147 hectares of granted mining and exploration licences and is located towards the southern end of the Chilean Coastal IOCG Belt in the Coquimbo Region of northern Chile. Further information about the project can be found in the NI 43-101 Technical Report lodged by Tribeca Resources on SEDAR+ on October 24, 2022.

On behalf of Tribeca Resources Corporation

Cautionary Note

Neither the TSXV nor its Regulation Service Provider (as that term is defined in the policies of the TSXV) accepts responsibility for the adequacy or accuracy of this press release.

This press release does not constitute or form a part of any offer or solicitation to purchase or subscribe for securities in the United States. The securities referred to herein have not been and will not be registered under the Securities Act of 1933, as amended (the “Securities Act”), or with any securities regulatory authority of any state or other jurisdiction in the United States, and may not be offered or sold, directly or indirectly, within the United States or to, or for the account or benefit of, U.S. persons, as such term is defined in Regulation S under the Securities Act (“Regulation S”), except pursuant to an exemption from or in a transaction not subject to the registration requirements of the Securities Act.

Forward Looking Information

This press release contains forward-looking statements and information that are based on the beliefs of management and reflect the Company's current expectations. When used in this press release, the words "estimate", "project", "belief", "anticipate", "intend", "expect", "plan", "predict", "may" or "should" and the negative of these words or such variations thereon or comparable terminology are intended to identify forward-looking statements and information. The forward-looking statements and information contained in this press release may include, but are not limited to, the terms and completion of the Offering, the ability to raise the minimum and maximum amounts of the Offering, the payment of finder’s fees and issuance of finder’s securities, the anticipated Closing Date and the planned use of proceeds for the Offering.

Such statements and information reflect the current view of the Company. By their nature, forward-looking statements involve known and unknown risks, uncertainties and other factors, which may cause our actual results, performance or achievements, or other future events, to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Such factors include, among others, the ability to obtain regulatory approval for the Offering, the state of equity markets in Canada and other jurisdictions, market prices, exploration successes, and continued availability of capital and financing and general economic, market or business conditions. Additional risks and uncertainties regarding the Company are described in its publicly-available disclosure documents, filed by the Company on SEDAR+ at www.sedarplus.com.

There are several important factors that could cause the Company’s actual results to differ materially from those indicated or implied by forward-looking statements and information. Such factors include, among others: reliance on key management; changes in the credit or security markets; results of operation activities; unanticipated costs and expenses; fluctuations in commodity prices; and general market and industry conditions. The Company cautions that the foregoing list of material factors is not exhaustive. When relying on the Company's forward-looking statements and information to make decisions, investors and others should carefully consider the foregoing factors and other uncertainties and potential events. Factors that could cause actual results to differ materially from those anticipated in these forward-looking statements are described under the caption “Cautionary Statement Regarding Forward-Looking Information” in the Company’s Amended Offering Document dated as of the date hereof, which is available for view on SEDAR+ at www.sedarplus.com.

The Company has assumed that the material factors referred to in the previous paragraph will not cause such forward-looking statements and information to differ materially from actual results or events. The forward-looking information contained in this press release represents the expectations of the Company as of the date of this press release and, accordingly, is subject to change after such date. Readers should not place undue importance on forward looking information and should not rely upon this information as of any other date. While the Company may elect to, it does not undertake to update this information at any particular time except as required in accordance with applicable laws.