Mr. Darryl Jones reports

STAR COPPER BEGINS DRILLING AT STAR EAST TARGET AS 15,000 METRE 2026 EXPLORATION CAMPAIGN GETS UNDERWAY

Star Copper Corp. has commenced its 2026 exploration and drill campaign at its flagship Star project in British Columbia.

Operational update

The company is mobilizing on its previously announced fully financed 15,000-metre drill program at the project. With over $15-million cash in hand, the program will double the historic number of metres drilled with the goal of producing a maiden resource (see news dated April 14, 2026) as well as testing the company's nested porphyry hypothesis. Klaus Heppe, technical adviser (see news dated May 20, 2026) is working hand in hand with senior project geologist Jeremy Hanson at Hardline Exploration Corp. to unearth the increasingly evident potential of the Star Main and satellite targets.

The early season program has been designed to test a series of compelling geophysical, geochemical and structural targets generated through the integration of induced polarization (IP) chargeability and conductivity anomalies, airborne magnetic data, soil and rock geochemistry, historic trenching, and detailed geological and structural mapping.

Four drill platforms have now been fully constructed, and the drill has been mobilized to the first pad located within the Star East target area, where drilling is expected to commence this week.

Initial drilling at Star East and Star North will target large chargeability anomalies coincident with elevated copper geochemistry and interpreted structural corridors. Additional drilling planned within the Copper Creek zone will evaluate multiple IP chargeability anomalies associated with coincident copper and gold soil anomalies hosted within strongly altered and fractured volcanic rocks and quartz monzodiorite dike swarms on both sides of the Copper Creek gully system. The drilling here will be to follow up on the successful first hole last year at Copper Creek (see news dated March 24, 2026)

Darryl Jones, chief executive officer of Star Copper, noted: "The start of drilling at Star East marks an important milestone as we launch what is expected to be our largest exploration campaign to date. The integration of new geophysical data, surface geochemistry and structural interpretation has significantly refined our targeting across the district. We believe the initial drill holes have the potential to demonstrate the broader-scale copper-gold potential of the Star project beyond the historically drilled Star Main zone."

The company expects the first part of the drill campaign to be followed by expanded drilling activities and additional geophysical surveys, including planned 3-D IP and magnetotelluric (MT) surveys intended to further refine deep porphyry copper-gold targets across the district.

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.

Warrant exercise update

In related news, Star Copper is pleased to report that all outstanding warrants exercisable at 75 cents per share have now been exercised, resulting in the company receiving approximately $4.5-million in additional proceeds bolstering the cash balance of the company to well over $15-million on hand.

The complete exercise of these warrants further strengthens the company's balance sheet and reflects continued support from existing shareholders and warrantholders. The additional capital provides Star Copper with increased financial flexibility as it advances its fully financed 2026 exploration program at the Star project, including drilling at Star North, Star East, Star West and Copper Creek, as well as planned 3-D IP and MT geophysical surveys designed to refine deeper drill targets at Star Main.

Marketing update

The company is further pleased to announce that it entered into an updated consulting services agreement dated effective as of June 1, 2026, with Upswitch Media Corp. to provide the company with certain marketing and investor relations services to expand awareness of the company's business and to communicate with the investment community. The Upswitch services may include, among other things, engaging copywriters, designing ad content and campaigns promoting the company, providing translation services, onboarding ad campaigns with publishers, and tracking, organizing and executing the Upswitch services through testing and analytic studies. The Upswitch services will be provided and disseminated through a variety of news and investment community on-line communications channels and may further include print publications where applicable. Upswitch will commence providing the Upswitch services on June 1, 2026, for an initial term of 90 days, renewable at the company's discretion after the expiry of the 90-day term. Upswitch is arm's length to the company. Jeff Gillis, the principal of Upswitch, is located at 2709B 43rd Ave., Suite 1013, Vernon, B.C., and will act as primary representative and service co-ordinator. Mr. Gillis may be contacted at 1-604-373-5875 and info@upswitchmedia.com. To the company's knowledge, Upswitch and Mr. Gillis do not currently own, directly or indirectly, securities in the capital of the company. In consideration of the Upswitch services and pursuant to the terms and conditions of the Upswitch agreement, the company has agreed to pay Upswitch an aggregate fee of $1-million. The Upswitch agreement does not provide for the issue of any securities of the company as compensation.

i2i Marketing Group LLC

In addition, the company entered into an on-line marketing agreement with i2i Marketing Group LLC dated June 1, 2026, pursuant to which i2i will provide corporate marketing and investor awareness services, including content creation management, author sourcing, project management and media distribution. Under the i2i agreement, the company has agreed to finance an initial marketing budget of up to approximately $600,000 (U.S.) for an initial term of six months commencing on the effective date of the i2i agreement, which budget will be applied toward the development, design and distribution of advertising content and media outreach as part of the marketing campaign. Following the initial term, the i2i agreement may continue on a month-to-month basis pursuant to mutual agreement, unless terminated by either party on 10 days of written notice. The services provided under the i2i agreement will be delivered and disseminated primarily through on-line news, marketing and investor communications channels and may include other media formats as agreed between the parties. i2i is arm's length to the company. Joe Grubb, the principal of i2i, is located at 1107 Key Plaza, Suite 222, Key West, Fla., and will act as primary representative and service co-ordinator. Mr. Grubb may be contacted at 1-240-315-4665 or contact@i2illc.com. To the company's knowledge, i2i and Mr. Grubb do not currently own, directly or indirectly, securities in the capital of the company. The i2i agreement does not provide for the issuance of any securities of the company as compensation.

Investing News Network

The company also entered into certain marketing and investor awareness agreements with Dig Media Inc., doing business as the Investing News Network (INN), pursuant to: (i) an INN agency service agreement dated May 31, 2026; and (ii) an INN campaign agreement dated May 31, 2026. Under the INN agency agreement, INN will provide programmatic advertising services, including competitor-targeted digital advertising, for a total fee of approximately $35,000 (U.S.). Under the INN campaign agreement, INN will provide a comprehensive investor marketing campaign, including advertiser profile hosting, banner advertising, press release syndication, newsletter coverage, video production, e-mail marketing, push notifications and related promotional services, for a total fee of approximately $60,000 (U.S.). The services provided under the INN agreements will be delivered and disseminated primarily through on-line news, marketing and investor communications channels and may include other media formats as agreed between the parties. The engagement under each of the INN agreements is for a term of approximately 12 months commencing May 31, 2026, and ending May 31, 2027, subject to earlier termination or extension in accordance with the terms of the respective agreements. The services under the INN agency agreement will commence at the discretion of the company and will continue until the allocated budget is exhausted, and the services under the INN campaign agreement will commence upon receipt of the initial payment. INN is arm's length to the company. Mike Rodger, a principal of INN, will act as primary representative and service co-ordinator. INN and Mr. Rodger may be contacted at 604-688-8231, info@investingnews.com and mrodger@investingnews.com, respectively. To the company's knowledge, INN and its principals do not currently own, directly or indirectly, securities in the capital of the company. The INN agreements do not provide for the issuance of any securities of the company as compensation.

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.

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