Lucara Diamond Corp. — Proxy Solicitation & Information Statement 2026

Apr 2, 2026

April 02, 2026

Computershare

510 Burrard Street, 3rd Floor

Vancouver BC, V6C 3B9

www.computershare.com

To: All Canadian Securities Regulatory Authorities

Subject: LUCARA DIAMOND CORP.

Dear Sir/Madam:

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

Meeting Type :	Annual General and Special Meeting
Record Date for Notice of Meeting :	April 30, 2026
Record Date for Voting (if applicable) :	April 30, 2026
Beneficial Ownership Determination Date :	April 30, 2026
Meeting Date :	June 18, 2026
Meeting Location (if available) :	Vancouver, BC
Issuer sending proxy related materials directly to NOBO:	No
Issuer paying for delivery to OBO:	Yes

Notice and Access (NAA) Requirements:

NAA for Beneficial Holders	Yes
Beneficial Holders Stratification Criteria:	Not Applicable
NAA for Registered Holders	Yes
Registered Holders Stratification Criteria:	Not Applicable

Voting Security Details:

Description	CUSIP Number	ISIN
COMMON SHARES	54928Q108	CA54928Q1081
COMMON RESTRICTED EX 30/5/2026	54928Q603	CA54928Q6031

Sincerely,

Computershare

Agent for LUCARA DIAMOND CORP.