US Copper Corp — Proxy Solicitation & Information Statement 2025

May 9, 2025

TMX

THE FUTURE IS YOURS TO SEE.

TSX TRUST COMPANY

VIA ELECTRONIC TRANSMISSION

May 9, 2025

TO ALL APPLICABLE EXCHANGES AND COMMISSIONS:

RE: RJK EXPLORATIONS LTD
Confirmation of Notice of Record and Meeting Dates

We are pleased to confirm that Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities.

We advise the following with respect to the upcoming Annual Meeting of Security Holders for the subject issuer:

1. ISIN: CA74960G4043
   CUSIP: 74960G404

2. Date Fixed for the Meeting: July 23, 2025

3. Record Date for Notice: June 3, 2025
4. Record Date for Voting: June 3, 2025

5. Beneficial Ownership Determination Date: June 3, 2025

6. Classes or Series of Securities that entitle the holder to receive Notice of the Meeting:
   CLASS A SUBORDINATE VOTING
   CLASS B MULTIPLE VOTING
   CLASS C PREFERENCE SHARES

7. Classes or Series of Securities that entitle the holder to vote at the meeting:
   CLASS A SUBORDINATE VOTING
   CLASS B MULTIPLE VOTING
   CLASS C PREFERENCE SHARES

8. Business to be conducted at the meeting: Annual

9. Notice-and-Access:
   Registered Shareholders: YES
   Beneficial Holders: YES
   Stratification Level: Not Applicable

10. Reporting issuer is sending proxy-related materials directly to Non-Objecting Beneficial Owners: NO

11. Issuer paying for delivery to Objecting Beneficial Owners: NO

Yours truly,
TSX Trust Company

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