Mr. Jeremy Martin reports

HORIZONTE MINERALS PLC 2022 SUSTAINABILITY REPORT

Horizonte Minerals PLC has published its 2022 sustainability report. This report, which is the company's fourth consecutive stand-alone annual sustainability report, has been prepared in accordance with the Global Reporting Initiative Standards (GRI) core option, and is accompanied by a wider set of disclosures on Horizonte's sustainability performance. These disclosure standards and frameworks, including the United Nations Global Compact, Sustainability Accounting Standards Board metals and mining sustainability accounting standard, and the mining local procurement reporting mechanism, provide insight into how Horizonte is making the transition from developer to producer in a sustainable manner, and demonstrates the company's commitment to transparent business conduct, and its work to manage any potential social and environmental impacts.

Jeremy Martin, chief executive officer of Horizonte, commented:

"It gives me great pleasure to introduce our sustainability report for 2022. Embedding sustainability in our operational practices means tackling the major environmental, social and governance challenges that companies like ours are currently facing in the mining and metals sector -- including decarbonization and the continuing need to minimize our own environmental footprint.

"As countries around the world move towards climate-smart economies, there is growing recognition of the importance of the natural environment within global society. As we develop the Araguaia nickel operation, we are meeting the challenge of managing these precious shared resources, including water, biodiversity, land and air, whilst producing the minerals that are vital to this low-carbon transformation.

"Horizonte is committed to creating lasting value for future generations. We are building a business that is designed to create value for all stakeholders for many years to come."

Two thousand twenty-two sustainability highlights include:

• A great place to work:
  • Zero fatalities and zero lost time injuries;
  • 100-per-cent COVID work force vaccination;
  • Zero human rights complaints;
  • Inclusion and diversity policy.
• Proud partners:
  • Strategic partnerships established for local employment and supplier capacity development;
  • Stewardship initiatives to minimize impact and protect biodiversity.
• Acting with integrity:
  • Board review of governance architecture;
  • Inauguration of board-level sustainability committee.
• Achieving growth goals:
  • Supplier code of conduct;
  • Araguaia critical habitat assessment to complement biodiversity action plan.
• Operational excellence:
  • 10-year energy supply secured from primarily renewable sources;
  • High gender diversity with 30 per cent female employees;
  • 99 per cent of Brazil work force are Brazilian, in line with the company's local content objectives;
  • Over 50 per cent of our procurement spend was with Brazilian companies, enhancing local value retention.

About Horizonte Minerals PLC

Horizonte Minerals is developing two 100-per-cent-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, low-carbon and scalable. Araguaia is under construction with first metal scheduled for early 2024, when fully ramped up with Line 1 and Line 2, and is forecast to produce 29,000 tonnes of nickel per year. Vermelho is at feasibility study stage and is expected to produce 24,000 tonnes of nickel and 1,250 tonnes of cobalt to supply the EV (electric vehicle) battery market. Horizonte's combined near-term 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 SARL, Glencore PLC and Orion Resource Partners LLP.

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