Mr. Niel Marotta reports

SUN SUMMIT STRENGTHENS CU-AU PORPHYRY POTENTIAL AT THE JD PROJECT, TOODOGGONE DISTRICT: DEFINES AN OPEN-ENDED 8.5 KM LONG IP ANOMALY

Sun Summit Minerals Corp. has released results from a recently completed induced polarization (IP) survey across the JD porphyry trend at the JD project in the Toodoggone mining district in north-central British Columbia.

Highlights:

• New IP data enhances the JD porphyry trend: New chargeability and resistivity data demonstrate strong prospectivity for porphyry-related copper-gold mineralization along the JD porphyry trend.
• Untested anomalies: Only 850 metres of the 8.5-kilometre-long chargeability anomaly has been tested by drilling, where all five widely spaced holes from 2013 and 2018 intersected porphyry-related alteration and mineralization (see Feb. 5, 2025, news release).
• Follow-up programs continuing: Geological mapping and prospecting surveys along the McClair Creek alteration zone are continuing. Data from recently completed soil surveys along parts of the JD porphyry trend are being compiled and interpreted to refine drill targets.
• Phase II IP survey: A subsequent phase of closely spaced IP survey south of the Creek zone is newly completed and results are being integrated with the 2024 IP survey historical data and with the current 3-D model of the Creek zone.

"We have now defined a broad, 8.5-kilometre-long chargeability-high anomaly at JD, significantly enhancing the project's copper-gold porphyry potential along the McClair Creek alteration zone," said Niel Marotta, chief executive officer of Sun Summit Minerals. "This impressive alteration zone transects the JD porphyry trend, yet, remarkably, only five historic drill holes have tested it. The vast majority of this large-scale anomaly remains untested and represents a high-priority area for further target definition and exploration."

The JD porphyry trend IP survey

The IP survey across the JD porphyry trend consisted of over 31 line kilometres across eight northeast-southwest-oriented lines. Line spacing varied from 500 to 1,200 metres depending on design depth of earlier survey arrays. The 2025 survey was designed to characterize and detect subsurface sulphide mineralization associated with pronounced magnetic anomalies and strong hydrothermal alteration observed along McClair Creek (see Feb. 5, 2025, news release). The IP survey expanded on previous surveys that defined a north-south-trending, open-ended, high-chargeability anomaly. New and historic data were compiled and inverted.

The broad, north-south-oriented greater-than-18-millivolt-per-volt McClair Creek chargeability-high anomaly spans 8.5 by approximately two kilometres and is open to the north and south. The broad anomaly is locally spatially coincident with discrete strong magnetic-high anomalies and near the Belle South target, a strong resistivity-high anomaly. The intensity of the chargeability anomaly increases with depth, particularly to the north, where the anomaly increases to more than 40 millivolts per volt near the Fericrete and Oxide Peak targets.

Besides five widely spaced drill holes near the McClair target in 2013 and 2018, no other chargeability anomaly along the 8.5-kilometre trend has been drill tested. Results from the five McClair holes (see Feb. 5, 2025, news release) suggest the entire trend may also be prospective for porphyry-related mineralization.

The McClair Creek anomaly is along trend, 17 kilometres north of Amarc Resources' Aurora discovery. Porphyry-related copper and gold mineralization at Aurora is spatially associated with strong coincident chargeability-high and resistivity-high anomalies centred on a magnetic-high anomaly.

Next steps

This new chargeability and resistivity data support the strong prospectivity for partially concealed, porphyry-related copper-gold mineralization proximal to the McClair Creek alteration zone. Additional IP surveying is warranted to infill widely spaced lines and to extend the survey footprint to the north and south.

Data from recently completed soil surveys along parts of the JD porphyry trend are being compiled and interpreted to refine drill targets. Data from these surveys, together with results from continuing geological mapping and prospecting along the McClair Creek alteration zone, will be used to inform drill targeting and testing.

National Instrument 43-101 disclosure

This news release has been reviewed and approved by Sun Summit's vice-president, exploration, Ken MacDonald, PGeo, a qualified person as defined in NI 43-101, Standards of Disclosure for Mineral Projects, of the Canadian Securities Administrators. Some technical information contained in this release is historical in nature and has been compiled from public sources believed to be accurate. The historical technical information has not been verified by Sun Summit and may in some instances be unverifiable dependent on the existence of historical drill core and grab samples.

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'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 diverse portfolio includes the JD and Theory projects in the Toodoggone region of north-central British Columbia and the Buck project in central British Columbia.

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