RPX Gold’s Drilling Extends Near Surface Gold Mineralization and along Strike -Assay Results of up to 30..12 g/t Gold over 3.39 Metres
Press Release
Toronto, Ontario – May 27, 2026 – RPX Gold Inc. (“RPX Gold” or the “Company”) (TSXV: RPX. OTCQB: RDEXF) is pleased to announce gold assay results from its 2025-2026 drilling program at its Wawa Gold Project, Ontario. The drilling program was designed to confirm the continuity of, and potentially extend, near surface gold mineralization in the area of the open pits defined in the 2026 Preliminary Economic Assessment (“2026 PEA” ). These new assay results will be included in the updated mineral resource estimate (“MRE””) planned for later this year and will be reflected in the prefeasibility study (“PFS”) targeted for H1 2027.
Highlights (See Figure 1 and Table 2):
⦁ 2025-2026 drilling program suggests the possibility of joining the North and South pits evaluated in the 2026 PEA
⦁ Results include:
o 13.82 grams per tonne gold (“g/t Au”) over 4.94 metres (“m”) core length, including 55.20 g/t Au over 1.04 m in SD-26 639
o 23.20 g/t Au over 1.18 m and 2.09 g/t Au over 5.37 m, including 9.67 g/t Au over 0.78 m in SD-26-636
o 8.77 g/t Au over 13.33 m, including 30.12 g/t Au over 3.39 m in SD-26-626 o 3.33 g/t Au over 16.78 m, including 19.40 g/t Au over 0.97 m in SD-26-627
o 2.38 g/t Au over 14.49 m, including 8.94 g/t Au over 1.31 m and 9.32 g/t Au over 0.88 m in SD-25-625
o 4.63 g/t Au over 13.25 m core length, including 18.60 g/t Au over 1.47 m and 14.70 g/t Au over 0.88 m
Michael Michaud, President and CEO of RPX Gold, commented “The recent results from the drilling program continue to demonstrate the continuity of gold mineralization in the Jubilee deposit and further increase our confidence in the updated MRE we plan to complete later this year in advance of the PFS.
We are also excited by the drilling completed outside of the open pits defined in the recent 2026 PEA, which has extended the gold mineralization beyond the current mineral resources by over 100 m. In particular, drilling completed between the North and South open pits have confirmed the continuity of gold mineralization and have further validated our geological interpretation of the deposit. The high-grade intercepts from the corridor between the North and South open pits returned 13.82 g/t Au over 4.94 m and 8.77 g/t Au over 13.33 m, confirming that meaningful gold mineralization persists along strike in an area that was previously undrilled at this density. We are especially encouraged to see strong grades and broad mineralized intervals extending along strike in areas that were not incorporated into the 2026 PEA. These results support the potential for future open pit expansion and present the opportunity to further evaluate the connection of the two open pits as drilling continues. It is rewarding for the technical team to see the drilling confirm our internal geological models while continuing to identify opportunities to enhance the scale and development potential of the Wawa Gold Project.
We will continue to test the near surface strike extension of the deposit between the two open pits as well as test the deeper resources part of the underground mine outlined in the 2026 PEA. We also plan to test several of the exploration targets identified in the 2025-2026 drilling program later this year.
Our focus remains to advance the PFS to completion which is anticipated in H1 2027. The activities to advance the PFS represent a de-risking of the Wawa Gold Project, which we believe will add value at every step along the way.”
Results from the 2025-2026 Drilling Program
The 2025-2026 drilling program targeted gold mineralization in areas of open- pit potential along the Jubilee Shear. The results announced today demonstrate that gold mineralization in the Jubilee Shear extends to surface in the crown pillars of the historical mines and that significant zones of mineralization remain to be discovered in areas that were either sparsely tested or untested in historical drilling programs.
In the Jubilee mine area, drilling within and near the edges of the South Pit extended and uncovered new areas of high- grade gold mineralization (Figure 1 and Table 2). These new drilling intersections, particularly in SD-25-616 which intersected 10.05 g/t Au over 8.59 m including 82.80 g/t Au over 0.92 m (see press release of December 16, 2025), SD-26- 626 and SD-26-639, could increase the inventory of high-grade gold mineralization in the South Pit area.
In the gap between the South and North pits, near- surface drilling extended gold mineralization with open-pit potential to surface (Figure 1 and Table 2). This includes the significant intersection in SD- 25-593 which intersected 4.63 g/t Au over 13.25 m, including 18.60 g/t Au over 1.47 m (see press release of December 16, 2025).
The drilling program has also validated historical drilling results in targeted areas which improves our confidence in the block model supporting the 2026 PEA.
New 2026 Drilling Program
RPX recently initiated a diamond drilling program to confirm, and potentially extend, gold mineralization in the areas with open-pit and underground potential along the Jubilee Shear that are being evaluated in the ongoing work being done to complete the PFS (see press release of May 20, 2026).
Quality Assurance/Quality Control (“QA/QC”) Measures
Individual drill core samples are labelled and sawn in half along a pre-marked cutting line. A consistent half-core sample is then placed in an individual numbered plastic sample bag that is sealed. The remaining half-core samples are kept at the Company’s core storage facility located on the Wawa Gold project. Quarter-core duplicates are taken from certain samples to define the variability of gold distribution. Groups of samples are then placed into durable rice bags sealed with security seals to be transported by commercial carrier for analysis at Activation Laboratories Ltd. (Actlabs), Ancaster, Ontario. NQ core assays are obtained by 50-gram fire-assay with a AA finish or by 1-kilogram metallic screen fire assay. The 1-kilogram metallic screen assay method is selected for samples anticipated to contain coarse gold and when the original fire-assay returns results greater or equal to 2.25 g/t Au. The residual coarse reject portions of the samples remain in storage for a minimum 90-day period if further work or verification is needed.
As part of its QA/QC program, RPX Gold inserts external gold standards (low- to high-grade) and blanks every 20 samples and routinely inserts blanks immediately after samples with visible gold. Quarter core duplicates are routinely inserted to evaluate the natural variability of gold mineralization. Assay certificates are sent to at least three members of the senior management team, and they are directly accessible from the WebLIMS portal of Actlabs. Approximately 5% of the pulps and coarse rejects analyzed at Actlabs are sent to Agat Laboratories in Thunder Bay for umpire testing.
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