Rokeby Resources Initiates Nine-Hole Drilling at Fully Permitted Sunnyside Deposit, Omeo Gold Project, Victoria

Rokeby Resources Begins First Drilling Campaign at Sunnyside Deposit Post-Acquisition

Rokeby Resources has initiated its maiden drilling program at the Sunnyside deposit within the Omeo Gold Project, marking a key milestone following the asset's acquisition. Drilling started on 28 May 2026, with four holes totaling 916.45 metres completed to date. A fifth hole is in progress, with four more planned to complete the nine-hole program. This represents Rokeby's inaugural drilling activity at Omeo, underscoring its commitment to advancing exploration and resource definition rapidly.

The drilling program benefits from the development-ready status of Sunnyside, which is fully permitted for current operations, eliminating typical regulatory delays. Samples from completed holes have been sent to external laboratories for assay, with results to be released upon receipt and analysis. This approach ensures data integrity and thorough evaluation before public disclosure.

Targeting High-Grade Mineralisation Shoots in Structured Sunnyside Exploration

The drilling campaign at Sunnyside is designed to test six distinct high-grade mineralisation shoots identified from historical drilling and mining. The nine-hole, 2,180-metre program strategically targets these zones to extend mineralisation along strike and at depth, leveraging extensive historical workings.

Key historical intersections guiding the program include 15.9 metres grading 52.3 g/t Au (hole SSDH017), 0.8 metres at 238.5 g/t Au (SSDH026), 3.55 metres at 26.6 g/t Au (SSDH053), and 2.65 metres at 23.9 g/t Au (SSDH045). The current drilling includes twin holes to validate historical data, as well as infill and plunge extension tests. Early results from the first three holes show excellent core recovery and minimal deviation from planned trajectories.

Mining One Appointed to Update Historical Resource Estimate to JORC (2012) Standards

Rokeby has engaged Mining One as the competent person to update the Mt Wills historical resource estimate to JORC (2012) standards. This critical step converts legacy exploration data into a compliant mineral resource estimate aligned with current industry and regulatory requirements. Previously, the Mt Wills estimates, covering Maude and Sunnyside deposits, were reported under JORC Code (2004) and had not been updated.

The company confirms no new information materially affects historical results. Nonetheless, the ongoing drilling and subsequent JORC (2012) resource update will establish a modern framework for understanding Sunnyside's mineralisation and guide expanded drilling plans. The use of an independent competent person enhances credibility and reflects Rokeby's commitment to transparency and professionalism.

Omeo Gold Project Situated in North-East Victoria with Strong Tenure

The Omeo Gold Project lies roughly five hours north-east of Melbourne within a historically prolific gold mining region. It comprises two main tenement areas: Mt Wills, including exploration licence EL 6323 and one of Victoria's longest continuously granted mining leases (MIN 4921), and the Cassilis area with exploration licences EL 5504 and EL 5427. Mt Wills hosts a historical resource across Maude and Sunnyside deposits, which remain open along strike and at depth.

Proximity to Melbourne offers logistical advantages, while the secure tenure—especially the longstanding Mt Wills mining lease—supports development activities. The tenement structure enables Rokeby to focus immediate drilling on the fully permitted Sunnyside deposit while retaining flexibility across broader exploration zones. This strategic positioning within a historically productive region underpins the asset's development-ready classification.

Significant Historical Gold Production and High-Grade Mineralisation at Mt Wills

Mt Wills boasts a rich history of gold mining, with over 235,000 ounces produced at grades above 18 g/t Au. This production record validates the presence of economic, high-grade gold mineralisation in the district. The consistently high grades align with the ultra-high-grade shoots targeted in Rokeby's current drilling program.

The historical mining success supports Rokeby's exploration strategy focused on defining discrete, high-grade zones. Historical intersections reaching up to 238.5 g/t Au demonstrate the potential for concentrated extraction and processing, consistent with the company's exploration model.

Comprehensive Nine-Hole Program Targets Six High-Grade Zones at Sunnyside

The nine-hole, 2,180-metre program is structured to systematically test six high-grade mineralisation zones via twinning, infill, and extension drilling. Completed holes include a twin of SSDH017 confirming the 15.9-metre intersection at 52.3 g/t Au, and two holes testing its plunge extensions. Another completed hole targets the down plunge extension of mineralisation in SSDH001.

Ongoing and planned holes will continue this approach, including tests of down plunge mineralisation in SSDH040 and infill around high-grade zones from SSDH045 (2.65 metres at 24.9 g/t Au) and SSDH053 (3.5 metres at 26.6 g/t Au). This targeted drilling maximizes meterage efficiency to extend mineralisation vertically, laterally, and along plunge directions.

External Laboratory Assays Ensure Rigorous Sample Analysis

Rokeby has outsourced assay services to an external laboratory for samples from the drilling program. Results will be released to the market once received and interpreted, adhering to industry standards for analytical independence and quality control.

Assay timing depends on laboratory schedules and internal reviews. Early indications from the first three holes show strong core recovery and minimal deviation, supporting confidence in sample quality and drilling precision.

Ambitious 12-Month Work Program to Expand Mt Wills Resource Base

Rokeby has committed to a rigorous 12-month program to build on the historical resource base at Mt Wills. Managing Director Richard Beazley highlighted that this structured plan leverages extensive historical workings and high-grade shoots across Sunnyside and Maude. The current nine-hole Sunnyside program forms the foundation for a broader initiative, with results guiding expanded drilling integrating both deposits.

This systematic approach reflects management's strategic focus on resource definition and confidence in the asset's prospectivity. By upgrading and expanding the historical resource, Rokeby aims to progress efficiently beyond baseline exploration. Planned drilling expansion across Mt Wills intends to delineate multiple discrete, high-grade zones supporting integrated mining and processing.

Fully Permitted, Development-Ready Sunnyside Deposit Offers Competitive Advantage

Sunnyside's fully permitted, development-ready status provides a significant edge in exploration and development. Regulatory approvals and environmental assessments are complete, enabling immediate drilling without further permitting delays. This maturity distinguishes the Omeo Gold Project from earlier-stage assets.

Located within Mt Wills mining lease (MIN 4921), one of Victoria's longest continuously granted leases, Sunnyside benefits from tenure security and a robust regulatory framework. This low-friction environment supports Rokeby's planned exploration and resource definition activities without major regulatory obstacles.

Drilling Results to Inform Broader Mt Wills Exploration Strategy

The Sunnyside drilling program serves as a platform for expanded exploration across Mt Wills. Results from the nine-hole campaign will underpin a JORC (2012) resource estimate and guide subsequent drilling phases integrating Maude and Sunnyside deposits. This phased strategy enables iterative geological refinement and prioritization of targets.

Mining One's resource update provides a compliant benchmark to assess drilling success. Rokeby's structured exploration roadmap emphasizes resource estimation, results delivery, and expanded drilling guidance, ensuring transparent communication and systematic asset advancement over the next 12 months.