May 27, 2026 - Avventura Announces High-Grade Grab Samples Across Horwood Property

ADDITIONAL HIGH-GRADE GOLD GRAB SAMPLES UP TO 24.0 G/T

AU IDENTIFIED ACROSS HORWOOD PROPERTY

Vancouver, British Columbia, 27 May, 2026 – Avventura Resources Ltd. (CSE:AA) (Avventura

or the Company) is pleased to provide 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 Ontario.

Highlights

● Multiple anomalous and locally high-grade gold grab samples identified across the Horwood

Property.

● Highest newly reported grab sample returned 24.0 g/t Au.

● 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 CEO, 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 December 23, 2025 news release, which

disclosed initial grab sample results including a sample grading 62.0 g/t Au from the Denross

occurrence area.

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Highlighted rock sample results are summarized below:

Sample Number Gold (g/t au)

F573764 24.0

F573781 21.9

F573799 7.94

F573237 2.796

F573234 1.463

F573788 1.129

F573834 1.015

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 (Figure 1). Generally, the anomalies are subtle,

with samples greater than 9 ppb Au considered highly anomalous in the dataset, 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.

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Figure 1. Location of B-horizon soil samples on the Horwood Property (red outline) overlying

geology.

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,

Ontario, Canada, an independent and ISO-accredited laboratory, for gold analysis using fire assay

methods with ICP-OES finish. Over limit samples were re-assayed 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 December 21,

2022, and amended August 1, 2023. Historical grab sample results disclosed in the report included

values up to 6.01 g/t Au from the Denross occurrence area.

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About Avventura Resources Ltd.

Avventura Resources Limited 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, P.Geo., a Qualified Person as defined by National Instrument 43-101 –

Standards of Disclosure for Mineral Projects.

Forward‐Looking Information

This news release contains "forward‐looking information" within the meaning of applicable securities laws,

including statements regarding the Company’s planned exploration work and management appointments.

Readers are cautioned not to place undue reliance on forward‐looking information. Actual results and

developments may differ materially from those contemplated by such information. The statements in this

news release are made as of the date hereof. The Company undertakes no obligation to update forward‐

looking information except as required by applicable law.

For further information please contact:

Avventura Resources Ltd Avventura Resources Ltd

Anthony Balic – CFO Sean Flynn – CEO

[email protected] [email protected]

T: +1 604-312-2425 T: +1 250-857-2237

Website: www.avventuraresources.com

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RESPONSIBILITY FOR THE ADEQUACY OR ACCURACY OF THIS RELEASE.