Exhibit 99.1
TSX TRUST COMPANY
VIA ELECTRONIC TRANSMISSION
April 13, 2026
TO ALL APPLICABLE EXCHANGES AND COMMISSIONS:
| RE: | COLLECTIVE MINING LTD. |
Confirmation of Notice of Record and Meeting Dates
We are pleased to confirm that the Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities.
We advise the following with respect to the upcoming Annual and Special Meeting of Security Holders for the subject issuer:
| 1 | ISIN: | CA19425C1005 |
| CUSIP: | 19425C100 | |
| 2 | Date Fixed for the Meeting: | June 15, 2026 |
| 3 | Record Date for Notice: | May 8, 2026 |
| 4 | Record Date for Voting: | May 8, 2026 |
| 5 | Beneficial Ownership Determination Date: | May 8, 2026 |
| 6 | Classes or Series of Securities that entitle the holder to receive Notice of the Meeting: | COMMON SHARES |
| 7 | Classes or Series of Securities that entitle the holder to vote at the meeting: | COMMON SHARES |
| 8 | Business to be conducted at the meeting: | Annual and Special |
| 9 | Notice-and-Access: | |
| Registered Shareholders: | NO | |
| Beneficial Holders: | NO | |
| Stratification Level: | Not Applicable | |
| 10 | Reporting issuer is sending proxy-related materials directly to Non-Objecting Beneficial Owners: | YES |
| 11 | Issuer paying for delivery to Objecting Beneficial Owners: | YES |
Yours truly,
TSX Trust Company
|
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