Horizon Copper Shareholders and Warrantholders Approve Proposed Plan of Arrangement with Royal Gold

Executive Summary

• Horizon Copper shareholders and warrantholders approved the proposed plan of arrangement with Royal Gold (via AcquireCo) by >98% in each voting class.
• The transaction will result in Royal Gold indirectly acquiring all outstanding Horizon common shares (except Sandstorm’s) and all Horizon warrants, with closing expected on October 20, 2025 pending court approval.
• Post‑closing, Horizon intends to delist from the TSX Venture Exchange and cease reporting as a public issuer in Canada.

Key Details

• Voting Results:
• 99.13% of votes cast by all shareholders approved the arrangement.
• 99.36% of votes cast by shareholders + warrantholders voting as a single class approved.

• 98.09% of votes cast by shareholders (excluding Sandstorm and other excluded parties) approved.

• Transaction Structure:

• Royal Gold, through its Canadian subsidiary International Royalty Corporation (“AcquireCo”), will acquire all issued and outstanding Horizon common shares (except those held by Sandstorm Gold Ltd.).

• Horizon will acquire all outstanding Horizon warrants from warrantholders.

• Closing Timeline & Conditions:

• Anticipated closing date: October 20, 2025.

• Subject to customary closing conditions, including approval of the Supreme Court of British Columbia and other regulatory consents.

• Post‑Transaction Actions:

• Horizon plans to delist its shares from the TSX Venture Exchange after completion.

• The company will apply to Canadian securities regulators to cease being a reporting issuer in the applicable jurisdictions.

• Regulatory References:

• Detailed terms are available in the Company’s Notice of Meeting and Management Information Circular dated September 8, 2025 (SEDAR+).

Notable Quotes

(No direct quotes were provided in the release.)