Mr. Darryl Jones reports

STAR COPPER ENGAGES FORMER TECK RESOURCES EXPLORATION MANAGER KLAUS HEPPE AS STRATEGIC ADVISOR

Star Copper Corp. has entered into a consulting services agreement dated effective as of May 15, 2026, with Dr. Klaus Heppe, a Vancouver-based technical adviser with a record of porphyry development from exploration to commercialization. Pursuant to the agreement, Dr. Heppe will, among other things, support, assist and advise the company and board on certain technical, exploration and strategic project development options.

Star Copper chief executive officer Darryl Jones advised: "As we quickly head into the largest and most co-ordinated exploration effort in the history of the Star project, we are extremely grateful to have Klaus supporting our team. He brings significant technical, managerial and scientific horsepower to what is shaping up to what could be our most intensive and rewarding exploration season ever.

"His extensive subject matter expertise, practical experience and project development skills are exactly what we need to meet the challenges ahead," Mr. Jones continued. "On behalf of the entire team, we look forward to working together as we continue to grow our understanding of what we increasingly believe may in fact be a district-scale discovery" (see the company's news May 5, 2026).

The services to be undertaken by Dr. Heppe will include, among other things, supporting the team to develop a clear, testable exploration hypothesis (system type, geometry, controls and grade distribution), a conceptual discovery model to support incremental resource definition, while reviewing data integration, interpretation, annual exploration and operating plans aligned with potential market outcomes.

Dr. Heppe is a seasoned executive with more than 20 years of experience advancing multicommodity exploration, discovery and resource growth across the Americas, from early-stage exploration through feasibility studies and large-scale mine operations. He spent most of his career with Teck Resources Ltd., where he held several senior leadership roles, including exploration manager, Chile, and director, exploration, discovery excellence. Dr. Heppe currently serves as vice-president of exploration at Quilla Resources Inc., a Canadian/Peruvian company that has brought the Chapi copper mine in Peru back into production in record time.

Throughout his career, Dr. Heppe has led regional and global exploration teams focused on target generation, drill testing, technical excellence and discovery. His work has contributed to significant copper resource growth and discoveries in porphyry and epithermal systems across Chile, Peru, Argentina and Canada. He holds an MSc and PhD in geology from the University of Gottingen and completed postdoctoral research at the Colorado School of Mines.

Pursuant to the company's omnibus equity incentive plan, the company has agreed to grant Dr. Heppe 175,000 restricted share units (RSUs). The RSUs will be granted on the effective date of the agreement and, subject to reduction in the event of early termination of the agreement, will vest as to 75,000 on the date that is 12 months from the effective date and 100,000 on the date that is 24 months from the effective date. Upon vesting, each RSU is redeemable for one common share in the capital of the company in accordance with the company's omnibus equity incentive plan.

Qualified person

Jeremy Hanson, PGeo, a qualified person as that term is defined under National Instrument 43-101, is an independent contractor of the company and has reviewed and approved the technical aspects of this news release.

About Star Copper Corp.

Star Copper is a Canadian mineral exploration company focused on the discovery and advancement of large-scale copper-gold systems in British Columbia. The company's flagship Star project is located in British Columbia's prolific Golden Triangle and hosts multiple high-priority targets and exhibits geological characteristics consistent with significant porphyry copper deposits. The project hosts multiple copper-gold porphyry-style targets, including Star Main, Star North, East and West, Copper Creek, and Copperline. Significant exploration including historical drilling has confirmed open mineralization at depth and in all directions. Star Copper's strategic plans include geological mapping and geophysical surveys to refine existing targets, diamond drilling programs to test high-priority zones, environmental baseline studies and permitting groundwork alongside data analysis and resource modelling to support a future resource estimate prepared in accordance with NI 43-101. The company further plans to advance its Indata project with follow-up drilling to expand on previous high-grade copper and gold intercepts, trenching and surface sampling to delineate mineralized zones and infrastructure improvements for site accessibility and operations. With a commitment to sustainable development and value creation, Star Copper aims to position itself to support surging industrial demand to meet growing global electrification needs.

We seek Safe Harbor.