Mr. Rob Birmingham reports

GOLDHAVEN ADVANCES COPEÇAL GOLD PROJECT FOLLOWING INITIAL DRILLING; PHASE 2 PROGRAM PLANNED AT WEST TARGET

Goldhaven Resources Corp. has provided an exploration update and has outlined its forward exploration strategy following completion of the company's inaugural diamond drilling program at the Copecal gold project in Mato Grosso state, Brazil.

Highlights:

• First-ever diamond drilling program completed at Copecal, marking a major milestone in advancing the project from surface exploration toward subsurface discovery;
• Gold and copper anomalism intersected in drilling, accompanied by structural features and phyllic alteration consistent with a mineralized hydrothermal system;
• West target emerges as the most promising zone, demonstrating widespread gold anomalism within both saprolite and underlying bedrock and forming the focus of planned phase 2 drilling;
• Project supported by extensive historical exploration by AngloGold Ashanti, providing a strong technical foundation including geochemical, geophysical and geological data sets now being integrated with new drilling results;
• Phase 2 drill program planned for mid-Q2 2026, aimed at expanding mineralization and vectoring toward higher-grade zones at the West target.

"Completing the first diamond drilling program at Copecal marks an important milestone as we transition the project from surface exploration into systematic drill testing," said Rob Birmingham, president and chief executive officer of Goldhaven. "While this initial phase was designed as a first-pass program, the presence of gold and copper anomalism together with structural deformation, alteration and quartz veining provides strong geological indicators that we are operating within a mineralized system. The West target in particular has emerged as a priority area where phase 2 drilling will focus on expanding the system and vectoring toward higher-grade zones. With the benefit of new drill data combined with historical exploration work completed by AngloGold Ashanti, we believe the upcoming phase of exploration will significantly enhance our ability to target the core of the system."

Exploration program summary

The company completed nine diamond drill holes during the inaugural drill campaign at Copecal, representing the first-ever drilling program conducted on the property. The program tested two priority exploration areas referred to as the West target and the East target.

Drilling successfully confirmed the presence of anomalous gold and copper mineralization, as well as structural deformation, quartz veining and phyllic alteration consistent with hydrothermal mineralizing systems common to the region. These geological indicators support Goldhaven's working model that the Copecal project may host a broader mineralized system and that the initial drilling campaign represents an important first step in vectoring toward higher-grade zones.

The company believes the results from this initial program provide valuable technical information that will significantly refine exploration targeting as the project advances to its next phase.

West target -- priority area for phase 2 drilling

Results from the West target were the most encouraging from the program, with more consistent and widespread gold anomalism encountered in both saprolite and underlying bedrock.

Drill holes targeting this area intersected a substantially thicker saprolite profile extending to approximately 60 metres downhole, which may reflect preferential weathering associated with structurally controlled alteration zones.

Within the underlying granodiorite-gneiss host rocks, geological logging identified:

• Multiple phases of shearing and deformation;
• Quartz veining and sheeted veinlets;
• Structural fabrics consistent with potential fluid pathways;
• Alteration patterns typical of mineralized hydrothermal systems.

These features collectively support the interpretation that the West target may represent a larger mineralized corridor and will be the primary focus of the company's planned phase 2 drill program.

(Please refer to the company's Feb. 17, 2026, news release for detailed assay results from the West target drilling.)

East target

At the East target, drilling intersected coincident gold and copper anomalism accompanied by phyllic alteration and structural features consistent with intrusion-related systems.

While encouraging, the geological interpretation suggests that the initial drill holes may have intersected a more distal portion of the mineralized system, indicating that stronger mineralization may occur elsewhere within the broader target area.

Further geological interpretation and targeting work is under way to evaluate follow-up exploration opportunities within this zone.

(Please refer to the company's Dec. 17, 2025, news release for detailed assay results from East target drilling.)

Next phase of exploration

Goldhaven has initiated a comprehensive technical review integrating the new drill data with historical exploration data sets generated by AngloGold Ashanti, including geochemical, structural and geophysical data.

This integrated interpretation will focus on refining the geological model and generating additional high-priority drill targets.

Key components of the continuing technical work include:

• Detailed multielement geochemical interpretation;
• Structural analysis of mineralization controls observed in drill core;
• Alteration mineral characterization;
• Reinterpretation of historical geophysical data sets;
• Physical property testing of drill core including resistivity and conductivity measurements.

These data sets will be used to refine drill targeting for a phase 2 drilling program currently anticipated to commence by mid Q2 2026, with an initial focus on expanding mineralization and testing potential higher-grade zones at the West target.

About the Copecal gold project: a brief history

The Copecal gold project is strategically situated within the Alta Floresta gold province, a historically productive region that has yielded substantial gold discoveries since the late 1970s. Goldhaven's tenements cover a total of 3,681 hectares in a geologically favourable setting within the Juruena gold province of Brazil.

The Juruena gold province, also known as the Juruena Magmatic Arc, is an orogenic belt highly prospective for mesothermal shear-related and intrusion-related gold deposits, such as G-Mining's Tocantinzinho deposit. Additionally, the region hosts recently identified porphyry-style deposits (for example, Serabi, Jaca) and epithermal-style deposits (for example, X1, Aura). The presence of multiple deposit styles, along with the confirmation of large-scale gold deposits in the Juruena province of Brazil, underscores the significant potential of the Copecal gold project.

Recent exploration programs, including geochemical soil sampling, drone-mounted magnetometry surveys and historical drilling data, indicate the presence of multiple gold-bearing structures. Notably, AngloGold Ashanti previously conducted systematic exploration on the property from 2010 to 2016, including auger and air-core drilling, geophysical surveys, and rock geochemistry, identifying multiple zones of anomalous gold mineralization.

The Copecal gold project benefits from extensive historical work, with AngloGold Ashanti's exploration confirming gold and arsenic anomalies, indicative of significant mineralization potential. Soil sampling grids and follow-up auger drilling in key areas revealed consistent gold values over wide zones, further supporting the presence of a substantial mineralized system.

About Goldhaven Resources Corp.

Goldhaven Resources is a Canadian junior exploration company focused on acquiring and exploring highly prospective land packages in North and South America. The company's projects include (i) the flagship Magno project, a district-scale polymetallic property adjacent to the historic Cassiar mining district in British Columbia; (ii) the Three Guardsman project, which exhibits significant potential for copper and gold-skarn mineralization; (iii) the Copecal gold project, a drill-ready gold project located in Mato Grosso, Brazil, with a six-kilometre strike of anomalous gold-in-soil samples; and (iv) three critical mineral projects with extensive tenement packages totalling 123,900 hectares: Bahia South, Bahia North and Igautu projects located in Brazil.

Qualified person

The scientific and technical information disclosed in this document has been reviewed and approved by Jonathan Victor Hill, BSc, honours, FAusIMM, a non-independent qualified person consistent with National Instrument 43-101 and country manager of Goldhaven.

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