Horizon Copper Reminds Shareholders and Warrantholders to Vote in Advance of the Upcoming Special Meeting of Securityholders

Executive Summary

• Horizon Copper reminds shareholders and warrant holders to vote by the proxy deadline (Oct 7, 2025) on the Arrangement Resolution that will approve the transaction whereby Royal Gold (through AcquireCo) will acquire all outstanding Horizon shares (except those held by Sandstorm) and all Horizon warrants.
• The Board unanimously recommends voting FOR the Arrangement Resolution.
• All required governmental regulatory approvals have been received; closing is expected in early Q4 2025, subject to shareholder approval and Supreme Court of British Columbia consent.

Key Details

• Voting Deadline: October 7, 2025, 8:00 AM Vancouver time (proxy).
• Special Meeting Date & Time: October 9, 2025, 8:00 AM Vancouver time, Copper Boardroom, 733 Seymour Street, Vancouver.
• Arrangement Resolution: Approves the “Horizon Transaction” – Royal Gold (via AcquireCo) to acquire all Horizon shares (excluding Sandstorm’s stake) and all Horizon warrants.
• Board Recommendation: Unanimous recommendation to vote FOR the Arrangement Resolution.
• Regulatory Status: Royal Gold has obtained all required government regulatory approvals for both the Horizon Transaction and its previously announced acquisition of Sandstorm Gold Ltd.
• Closing Conditions: Subject to customary closing conditions, including shareholder approval, Supreme Court of British Columbia approval, and satisfaction/waiver of other standard conditions. Anticipated close: early Q4 2025.
• Voting Assistance: Proxy solicitation agent – Laurel Hill Advisory Group (toll‑free 1‑877‑452‑7184; outside North America 1‑416‑304‑0211; email [email protected]). Online voting encouraged due to Canada Post strike; instructions provided for both registered and beneficial security holders.
• Document Access: Full meeting materials available at www.horizoncopper.com/special-meeting.

Notable Quotes

(No direct quotes included in the release.)