Horizonte Minerals PLC — Proxy Solicitation & Information Statement 2022

Mar 18, 2022

March 18, 2022

Computershare

100 University Avenue, 8th floor

Toronto ON, M5J 2Y1

www.computershare.com

To: All Canadian Securities Regulatory Authorities

Subject: HORIZONTE MINERALS PLC

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 Meeting
Record Date for Notice of Meeting :	April 12, 2022
Record Date for Voting (if applicable) :	April 12, 2022
Beneficial Ownership Determination Date :	April 12, 2022
Meeting Date :	May 24, 2022
Meeting Location (if available) :	London, UK
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	No
NAA for Registered Holders	No

Voting Security Details:

Description	CUSIP Number	ISIN
ORDINARY SHARES	G463B6107	GB00B11DNM70

Sincerely,

Computershare

Agent for HORIZONTE MINERALS PLC