(via TheNewswire)

27 MAY, 2026 | VANCOUVER, BC – TheNewswire - Tribeca Resources Corporation (TSXV: TRBC) (OTCQB: TRRCF) (“ Tribeca Resources ”, the “ Company ”) reports progress at its northern Chile copper projects.

Tribeca has exercised its right, under an existing purchase option agreement (the “ Purchase Option Agreement ”), to acquire a 100% interest in the Gaby-Totito property at its La Higuera IOCG Project (“ La Higuera ”). This transaction provides Tribeca with, for the first time, 100% and outright ownership of all concessions across its flagship La Higuera project.

In addition, drilling is progressing at the Chirsposo Sur target, located 4km to the south of Gaby, and pre-drilling field activities at the Jiguata porphyry – high sulphidation copper exploration Project (“Jiguata”) are now complete.

Highlights:

• Gaby-Totito property purchase option exercised via US$500,000 completion payment. Deferred payments to be made through to September 2027 (see details below), with a 1% NSR retained by the Project Vendors over future production  

• First of three planned drill holes at the previously untested Chirsposo Sur target completed. Assays are pending  

• Field data collection for the Jiguata MT survey completed, with data processing and interpretation in progress. Drill planning will commence once pending hyperspectral and multielement soil data are received from the laboratory  

Tribeca Resources CEO, Dr. Paul Gow commented:

“We are very pleased to have acquired 100% ownership of the Gaby-Totito property which hosts the exciting Gaby discovery. This proactive transaction is a pivotal milestone and underscores our disciplined approach to capital management. We look forward to proceeding with additional drilling at the Gaby target later in the year.”

“Four kilometers south of Gaby, at the Chirsposo Sur target, drilling is progressing. We are testing a “blind” geophysical target, consistent with our science-driven approach to identifying and testing previously missed or misunderstood targets below cover. Assay results from the first hole are expected in 4-6 weeks and will be reported in due course.”

“At Jiguata, which we believe has potential to host a large Miocene porphyry copper or high sulphidation system, we are excited to plan our maiden drill program, once analyses for the remaining soil and rock samples are received.”

Exercise of Gaby Purchase Option

The La Higuera project was originally consolidated through four separate purchase or option-to-purchase agreements. Three of the four properties have been 100% outright owned since 2022. The Gaby-Totito properties, held under a 100% Purchase Option Agreement, had a final US$1.55 million payment due by September 2026. Tribeca Resources has exercised this option and now holds a 100% interest in the project. The option was exercised early through negotiation with the project vendors, a private Chilean group of investors. US$500,000 of the US$1.55 million final purchase payment has been paid with deferred payments due as follows:

• US$500,000 payable by September 15, 2026  

• US$550,000 payable by September 15, 2027  

• Exploration levy payments of 10% of exploration expenditure incurred on the properties between 1 January 2026 and 15 September 2027 are to be made semi-annually.  

The project vendors retain a 1% NSR royalty over future production from the Gaby-Totito property.

Taking outright ownership of Gaby-Totito demonstrates the confidence Tribeca has in the potential for the mineralised Gaby system to ultimately form an integral part of a new multi-deposit copper district at La Higuera. This transaction delivers flexibility in how Tribeca finances and advances this highly prospective property.

Click Image To View Full Size

Figure 1. Location of the Gaby-Totito licences. Also shown are the five targets within the La Higuera project and the three proposed drill collars at Chirsposo Sur.

Chirsposo Sur drill program

As previously announced in the news release of April 28, 2026, a drill program comprising three diamond holes for approximately 1,050m, is underway at the Chirsposo Sur target. Two holes are designed to test discrete magnetic highs within the main magnetic and gravity target, with a third hole to the south (Figure 2) to test a rare coincident low resistivity (<60 ohm.m) anomaly evident in the pole-dipole IP data.

The first of the three holes, CSS-001, was drilled to the west and has now been completed to a depth of 329m. The drill core is currently being cut and will be submitted to the laboratory for assay, with results reported in due course.

The rig is now moving to the second planned hole which will be testing a second magnetic high 300m to the south of CSS-001within the main magnetic and gravity target. The third proposed hole, testing a low resistivity IP anomaly, is a further 500m to the south.

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Figure 2.  Location of the three proposed drill holes at the Chirsposo Sur target, shown in the context of the ground magnetic data.

Jiguata update

Geological mapping at Jiguata was completed in April, with the key outcomes from this work being the ground truthing of the four large alteration systems delineated from the detailed satellite data (see news release dated February 25, 2026). These alteration systems variably display indications of a high-level hydrothermal system, including associated advanced argillic alteration, silica-alunite breccias, vuggy quartz alteration and dacite domes. Rock sampling was completed in conjunction with the geological mapping, with 149 samples submitted to the laboratory. The final multielement analyses have now been returned and will be reported in due course.

A large soil sampling program was also completed, with a focus on the four large alteration systems, with a sampling spacing of between 100m and 400m. The 672 samples have been submitted to the laboratory for multielement analysis, with approximately 50% of the results returned to date.

The data collection component of the previously reported magneto-telluric (MT) survey has now been completed at Jiguata. The survey was designed to cover the four large alteration zones delineated by the geological mapping. The survey comprised data collection at 128 stations at a nominal 750m spacing to cover approximately 84 square kilometers. The data is currently being processed and interpreted.

Qualified Person

All scientific and technical information in this press release has been prepared by, or approved by, Dr. Paul Gow, who is the CEO of Tribeca Resources. He is a Member of the Australian Institute of Geoscientists (MAIG), a Member of the Australasian Institute of Mining and Metallurgy (MAusIMM) and a qualified person for the purposes of National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“ NI 43-101 ”). Dr. Gow has not verified any of the information regarding any of the properties or projects referred to herein other than the La Higuera IOCG Project , the Jiguata Project and the Chiricuto property. Mineralization on any other properties referred to herein is not necessarily indicative of mineralization on the La Higuera IOCG Project , the Jiguata Project and the Chiricuto property.

About Tribeca Resources

Tribeca Resources is a portfolio-driven copper explorer focused on northern Chile. Led by a team with a track-record of discovery and significant equity ownership, Tribeca Resources’ objective is to discover the mineral resources for the next generation of copper mines in Chile.

Tribeca Resources’ flagship La Higuera IOCG Project is now 100%-owned and has seen approximately 10,000m of drilling with mineralization defined over a 1.4 kilometer strike length at the Gaby discovery. The Chiricuto and Jiguata projects are earlier stage porphyry copper-gold-molybdenum targets, held under purchase option agreements.

On behalf of Tribeca Resources Corporation

Cautionary Note

Neither the TSX Venture Exchange Inc. nor its Regulation Service Provider (as that term is defined in the policies of the TSX Venture Exchange Inc.) 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 in this press release include statements regarding the relationship between alteration and rock characteristics identified in geological mapping and potential mineralization, the identification, prioritization and anticipated quality of exploration targets, the interpreted scale, extent and geological significance of alteration systems, the relationship between geophysical results and potential mineralization, the size, focus and timing of the proposed 2026 drill programs, the anticipated effectiveness of exploration methodologies, the integration of new and historic data to define drill targets,  planned exploration activities beyond drilling, the anticipated completion of field activities and commencement of drilling (including the potential for weather-related delays), the use of proceeds from recently completed financings, the ability to secure and maintain necessary permits and approvals and the operations and future plans of the Company, including potential additional drilling and property acquisitions .

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 of the Company to pay the purchase price and make any other payments required under the Jiguata Option Agreement, as well as to complete final purchase and exploration levy payments to acquire the Gaby target, the confidence of management that the mineralised Gaby system may ultimately form an integral part of a new multi-deposit copper district at La Higuera, risks associated with mineral exploration, including the risk that actual results of exploration will be different from those expected by management and that geological, geophysical and geochemical interpretations may not be confirmed by drilling, risks of delays or interruptions to exploration activities due to weather, logistical or access issues, risks related to obtaining and maintaining necessary permits and approvals, risks related to the availability and retention of key personnel, the ability to raise additional capital, fluctuations in commodity prices and market conditions, the reliability of historic or third-party data, the risk that any mineralization identified may be limited in size, continuity or economic significance, unanticipated costs or environmental liabilities, the risk that new laws or regulations could adversely affect the business and results of operations of the Company and anticipated work on the Company’s projects and other risks inherent in early‑stage mineral exploration projects .

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; the risk that exploration activities, including drilling, may not result in the discovery of economically viable mineralization; the risk that geological, geophysical or geochemical interpretations may prove inaccurate or incomplete; risks inherent in early‑stage mineral exploration projects for which no mineral resources have been defined; risks related to the Company’s ability to maintain its interest in exploration properties; results of operation activities; unanticipated costs and expenses; fluctuations in commodity prices; the reliability and limitations of preliminary, historic or third ‑ party exploration data; 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.

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.

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