Mr. Niel Marotta reports

SUN SUMMIT ANNOUNCES SELECTION OF CONSULTANTS TO COMPLETE METALLURGICAL TESTING ON THE JD PROJECT, TOODOGGONE MINING DISTRICT, B.C.

Sun Summit Minerals Corp. has engaged Fuse Advisors Inc. and Blue Coast Research Ltd. (BCR) for an initial metallurgical test program for the Creek and Finn zones at the company's JD project in the Toodoggone mining district, north-central British Columbia.

An initial metallurgical testwork program has commenced, focused on gaining a stronger understanding of the processing requirements for the JD project, which encompasses the Creek and Finn zones. Details include:

• The metallurgical program aims to focus on the Creek and Finn zones for head characterization, mineralogy, comminution, and gold and silver recovery testwork, facilitating preliminary flowsheet development for a potential bulk tonnage mine.
• The testwork program will investigate gold and silver recovery methods through a combination of cyanide leach, gravity concentration and flotation.
• Four master composites (MC) will be assembled from spatially distributed continuous interval composites.
• Two MC composite samples will be tested from the Creek zone: lower-grade altered pyrite rich material and higher-grade quartz carbonate veins and breccia zones.
• Two MC composite samples will be tested from the Finn zone: higher-grade, silicified and locally strongly veined/brecciated intervals; and lower-grade, variably altered footwall tuffs.
• Interval composites will represent a mining unit of five metres by assembling sequential samples.
• A total of 20 interval composites will be tested from select coarse core rejects from the 2025 drill program, totalling approximately 302 kilograms of material.
• Planned interval composite grade ranges for metallurgical testwork, with selections derived from previously disclosed drill assay results, include:
  • Creek zone quartz carbonate vein: four to 10 grams per tonne Au (gold);
  • Creek zone altered pyrite rich: 0.5 to one g/t Au;
  • Finn zone high grade: three to six g/t Au;
  • Finn zone low grade: 0.5 to one g/t Au.

"We are very excited to kick off this critical first-stage metallurgical testwork program at our JD project," said Niel Marotta, chief executive officer of Sun Summit Minerals. "Results from this detailed study will form part of a planned NI 43-101 technical report that will also include our inaugural mineral resource estimate for JD, expected in Q1 of 2027."

Sample preparation

Upon receipt at the BCR laboratory, samples will be inventoried and cross-referenced against a sample list provided by Sun Summit. Each composite will then be stage crushed to 100 per cent passing 10 mesh (1.7 millimetres) to minimize the further generation of fines. composites will be homogenized by passing multiple times through a rotary splitter. Once homogeneous, triplicate head assay subsamples will be taken and replicate 1.0 kg charges for metallurgical testwork will be produced.

Chemical and mineralogical characterization

Head samples will be assayed for the following:

• Triplicate Au by fire assay with ICP-OES finish;
• Ag, Cu, Pb, Zn, Fe by four-acid digest (4AD) with ICP-OES finish;
• Total sulphur and total carbon by combustion IR techniques;
• Multielement ICP scan;
• Cyanide-soluble Au and spiked leach shake tests.

Each sample will also be ground and sampled for mineralogical analysis using BCR's in-house TESCAN TIMA platform. This method will generate modal mineralogy, liberation and mineral associations.

Metallurgical testwork

Grind calibration testing will be completed to ensure primary grind size. Gravity assessment tests will investigate the potential for gravity recoverable gold using a Knelson MD3 lab gravity concentrator. The Knelson concentrate will then be passed over a superpanner. Each test product will be assayed for Au. A particle size distribution (PSD) will be completed on the Knelson tailings to verify primary grind size.

A number of sulphide rougher flotation tests have been allocated which will be assayed for Au, Ag, Fe and S total. A PSD will be completed on the final tailings to verify primary grind size. Rougher testing will investigate the effects of primary grind size, collector type(s) and addition, and retention time.

A number of cleaner flotation tests have also been allocated. Each cleaner test will be assayed for Au, Ag, Fe and S total. A PSD will be conducted on the rougher tailings to verify primary grind size. Allowance has also been included for Malvern sizing of regrind products. Cleaner testwork will investigate the effects of collector type(s) and dosage, as well as regrind size.

A number of 48-hour cyanidation bottle rolls have been allocated. Each test will be assayed for Au and Ag, with a multielement ICP scan on the final PLS. A PSD will be completed on the final residue to verify primary grind size.

Timeline

Fuse has estimated that the metallurgical testwork program will be carried out over three months with key results provided as received.

National Instrument 43-101 disclosure

The scientific and technical disclosure in this news release has been reviewed and approved by Sun Summit's vice-president, exploration, Ken MacDonald, PGeo, a qualified person (as defined in National Instrument 43-101 -- Standards of Disclosure for Mineral Projects of the Canadian Securities Administrators).

Community engagement

Sun Summit is engaging with first nations on whose territory the company's projects are located and is discussing their interests and identifying contract and work opportunities, as well as opportunities to support community initiatives. The company looks forward to continuing to work with local and regional first nations with continuing exploration.

About the JD project

The JD project is located in the Toodoggone mining district in north-central British Columbia, a highly prospective, deposit-rich mineral trend. The project covers an area of over 15,000 hectares and is in close proximity to active exploration and development projects, such as Thesis Gold and Silver's Lawyers and Ranch projects, TDG Gold's Baker-Shasta projects, Amarc Resources' AuRORA project, Centerra's Gold's Kemess East and Underground projects, as well as the past-producing Kemess open pit copper-gold mine.

The project is 450 kilometres northwest of the city of Prince George and 25 kilometres north of the Sturdee airstrip. It is proximal to existing infrastructure in place to support the past-producing Kemess mine, including roads and a hydroelectric power line.

The JD project is in a favourable geological environment characterized by both high-grade epithermal gold and silver mineralization, as well as porphyry-related copper and gold mineralization. Some historical exploration, including drilling, geochemistry and geophysics, has been carried out on the property, however the project area is largely underexplored.

About Sun Summit Minerals Corp.

Sun Summit Minerals is a mineral exploration company focused on the discovery, expansion and advancement of district-scale gold and copper assets in British Columbia. The company's portfolio is anchored by its flagship JD project, alongside the Theory project in the prolific Toodoggone region of north-central B.C. and the Buck project in central B.C.

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