Riverside Resources Intersects Near-Surface Gold and Base Metal Mineralization at Union Norte and Advances Multiple Targets for Phase 2B Drilling

Riverside Resources Inc. (RRI) reported Phase 2A summer 2026 core drilling results at its Union Project in Sonora, Mexico, conducted in partnership with Questcorp Mining Inc. The program completed seven holes totaling 530.1 meters.

Key reported intercepts include: - UND26-015 (Union Norte): 14.60 m @ 0.45 g/t AuEq from 1.00 m, including 5.60 m @ 0.96 g/t AuEq from 8.00 m, 4.60 m @ 1.09 g/t AuEq from 8.00 m, and 3.00 m @ 1.10 g/t AuEq from 9.60 m. - UND26-014 (Union Norte): 9.10 m @ 0.76 g/t AuEq from 1.90 m, including 0.70 m @ 1.97 g/t AuEq from 1.90 m, 6.50 m @ 0.84 g/t AuEq from 4.50 m, 4.50 m @ 1.18 g/t AuEq from 6.50 m, and 1.50 m @ 3.38 g/t AuEq from 9.50 m. - UND26-013 (Union Mine): No gold intercept was reported; only anomalous Pb and Zn were identified, indicating proximity to the historic Sproul manto. - UND26-017 (Jabali): Elevated As only, 10-80 ppm; no ore-grade interval. - UND26-018 (Luis Hill): Terminated at 70 m versus planned 150 m due to drilling complications; no assay result. - UND26-016 and UND26-019: No significant intercept reported.

The cutoff is 0.10 g/t AuEq, and true thickness is unknown. The AuEq formula and assumptions are disclosed. An IP anomaly at Luis Hill is described as having a strike of >1 km and a depth thickness of 200-300 m, but no new assays support it.

Riverside Resources Inc. (RRI) is a pre-resource, project-generator explorer with no revenue. At a recent price of C$0.45 and 93.44 million shares outstanding, the company’s market capitalization is approximately C$42 million. It holds roughly C$6.5 million in cash and carries no debt. The Union Project is partner-funded by Questcorp, with Riverside retaining an equity position and a 2.5% NSR royalty, meaning the company’s direct economic exposure to Union drill success is less than 100%.

The stock has re-rated sharply from about C$0.26 in early July 2026 to C$0.45 by September 8, 2026, near its 52-week high. This run reflects the Union geophysics, the start of Phase 2 drilling, the Ravena spinout financing, and the Revel REE option. However, this release delivers only low-grade, near-surface AuEq intercepts with no high-grade gold confirmation, one failed hole, and no assays supporting the key Luis Hill IP anomaly. This result is modestly disappointing relative to the high-grade surface samples and the promotional discovery narrative, but it does not fully invalidate the district-scale exploration thesis because Phase 2B and additional targets remain.

Riverside Resources Inc. (RRI) operates as a discovery incubator and project generator, funding early-stage exploration while seeking partner funding to retain equity and NSR royalties. The company has previously spun out entities including Faraday Copper, Arizona Metals, Silver Viper, Capitan Silver, and Blue Jay Gold. Its current portfolio includes the Union (Sonora), Ariel, Valle, Suaqui, Cecilia, Red Jacket, Revel, and Deer Park projects, alongside royalty interests in Arizona Metals, Capitan Silver, and Blue Jay Gold.

As of March 31, 2026, Riverside reported cash of C$6,515,183 and working capital of C$5,849,137. Total assets stood at C$14,396,163, with total equity at C$11,940,254, resulting in a book value per share of C$0.13. The company has no debt. The capital structure consists of approximately 93.44 million shares outstanding, with the presentation noting fully diluted shares of about 106.8 million.

For the six months ended March 31, 2026, Riverside recorded a net loss of C$1,647,337, driven by a Blue Jay receivable write-down and unrealized investment losses. In November 2025, the company completed a C$3.692 million private placement at C$0.20 per unit, which included half warrants at C$0.30.