Mr. Jeremy Martin reports

HORIZONTE MINERALS PLC ANNOUNCES AWARD OF OPTIONS

Horizonte Minerals PLC has awarded options to certain key employees and senior executives of the group, including certain key members of the Brazilian team.

The Company has awarded new share options on 13 July 2023 (the "Award Date") over 2,435,035 ordinary shares of pounds sterling0.20 each in the capital of the Company to executives (PDMRs) and key personnel in the UK and Brazil under the Company's unapproved (or 'non tax-advantaged') 2006 Share Options Scheme (the "Awards"). Each Award is exercisable in return for one ordinary share in the Company and will vest in three tranches generally on the 6-month, 12-month and 18-month anniversaries of the Award Date (with additional 12 months vesting period for certain employees) at a ratio of 1/3 each tranche, with exercise price of pounds sterling1.70 per ordinary share.

The exercise price of pounds sterling1.70 represents a premium of 10.4% to the closing price on 12 July 2023 of pounds sterling1.54.

The PDMRs set out below hold the following Awards:

Awards over a further 1,680,624 ordinary shares were granted to other members of the Leadership Team and other members of the Brazilian team.

The Awards have a maximum term of 5 years from the Award Date, subject to any earlier lapsing under the option agreements.

The total number of options outstanding is 15,056,285 which represents 5.60% of the current issued share capital of 268,778,906 ordinary shares.

The notification in respect of the Awards set out in the Annex below was made subject to the requirements of Article 19 of the Market Abuse Regulation:

ABOUT HORIZONTE MINERALS

Horizonte Minerals Plc (AIM/TSX: HZM) is developing two 100%-owned, Tier 1 projects in Para state, Brazil - the Araguaia Nickel Project and the Vermelho Nickel-Cobalt Project. Both projects are large scale, high-grade, low-cost, have low carbon emission intensities and are scalable. Araguaia is under construction with first metal scheduled for 1Q 2024. When fully ramped up with Line 1 and Line 2, Araguaia is forecast to produce 29,000 tonnes of nickel per year. Vermelho is at feasibility study stage and is expected to supply nickel to the critical metals market. Horizonte's combined production profile of over 60,000 tonnes of nickel per year positions the Company as a globally significant nickel producer. Horizonte's top three shareholders are La Mancha Investments S.a r.l., Glencore Plc and Orion Resource Partners LLP.

We seek Safe Harbor.