Mr. Sean Flynn reports

ADDITIONAL HIGH-GRADE GOLD GRAB SAMPLES UP TO 24.0 G/T AU IDENTIFIED ACROSS HORWOOD PROPERTY

Avventura Resources Ltd. has provided an update on additional assay results from the company's 2025 prospecting and rock sampling program completed on the Horwood property located southwest of Timmins, Ont.

Highlights

• Multiple anomalous and locally high-grade gold grab samples identified across the Horwood property;
• Highest newly reported grab sample returned 24.0 grams per tonne Au (gold);
• Additional grab samples returned 21.9 g/t Au, 7.94 g/t Au, 2.80 g/t Au, 1.46 g/t Au, 1.13 g/t Au and 1.02 g/t Au;
• Numerous additional anomalous gold values identified across the broader sampling program;
• The broader 2025 prospecting program has now returned grab samples grading up to 62.0 g/t Au;
• Areas of anomalous soil sampling results coincident with areas of high-grade rock samples continue to support the exploration potential and merit of the Horwood property and warrant additional follow-up work.

Avventura chief executive officer Sean Flynn commented: "We are encouraged by the continued results from the exploration program at Horwood. While the property remains at an early stage of exploration, the identification of multiple anomalous and locally high-grade gold samples across several areas of the property continues to support management's belief that Horwood warrants additional exploration. These results, combined with the previously announced 62.0 g/t gold sample, provide further evidence of widespread gold prospectivity across the project."

Rock sample results

The reported rock grab samples were collected from multiple target areas and historical occurrence zones across the Horwood property, including areas surrounding the Denross occurrence and other prospective geological trends identified during the 2025 field program. The newly reported results represent additional assays returned from AGAT Laboratories following the company's previously announced Dec. 23, 2025, news release, which disclosed initial grab sample results including a sample grading 62.0 g/t Au from the Denross occurrence area.

Highlighted rock sample results are summarized in the attached table.

The company cautions that grab samples are selective by nature and may not be representative of mineralization on the property as a whole. The reported results represent point samples only and should not be interpreted as indicative of the extent, continuity or grade of mineralization.

In addition to the highlighted samples above, numerous additional anomalous gold values were identified throughout the sampling program. The company believes these results continue to demonstrate widespread gold anomalism across the Horwood property and will assist in refining targets for future exploration activities.

Soil sampling results

In conjunction with the rock sampling program, B-horizon soil samples were collected over southern and northern portions of the property. Generally, the anomalies are subtle, with samples greater than nine ppb (parts per billion) Au considered highly anomalous in the data set, and typically reflect the presence of gold mineralization in the area. The three highest samples contained greater than 100 ppb Au (104, 182 and 210 ppb Au). The survey identified seven areas of anomalism, with four areas in the northern block and three areas in the south. The anomalous areas were related to geological and structural trends coincident with known showings and the rock sampling program. The coincidence of anomalous soils and rock samples provide targets of merit for future exploration efforts.

Technical details

The Horwood property is located within the Swayze greenstone belt in Northern Ontario and hosts multiple historical gold occurrences associated with regional-scale deformation structures and intrusive activity.

Rock samples were collected by company personnel following standard industry practices during the 2025 field season. Samples were securely transported to AGAT Laboratories in Thunder Bay, Ont., Canada, an independent and ISO-accredited laboratory, for gold analysis using fire assay methods with ICP-OES finish. Overlimit samples were reassayed using gravimetric fire assay methods where applicable.

The company notes that historical exploration results from the Horwood property were previously disclosed in the National Instrument 43-101 technical report entitled "NI 43-101 Technical Report on the Horwood Property, District of Sudbury, Ontario," effective Dec. 21, 2022, and amended Aug. 1, 2023. Historical grab sample results disclosed in the report included values up to 6.01 g/t Au from the Denross occurrence area.

About Avventura Resources Ltd.

Avventura Resources is a dynamic resource exploration and development company dedicated to identifying and advancing high-potential mineral assets. Focused on sustainable growth and responsible extraction practices, the company leverages technical expertise and strategic partnerships to unlock value in undervalued or frontier geological terrains. Avventura is committed to driving long-term shareholder value while adhering to rigorous environmental and social governance standards across its Canadian portfolio. They are examining anomalies and exploration targets noted for further investigation in B. H. Newton's August, 2023, "National Instrument 43-101 Technical Report on the Horwood Property, District of Sudbury, Ontario."

Qualified person

The technical information contained in this news release has been reviewed and approved by Mike Kilbourne, PGeo, a qualified person as defined by National Instrument 43-101 -- Standards of Disclosure for Mineral Projects.

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