Appointment of a non-executive director

In compliance with Section 3.59 of the Listings Requirements of the JSE Limited, the Board is pleased to announce that Dr Vasileios Vergopoulos has been appointed to the Board as an independent non-executive director with effect from 27 November 2025.

Dr Vergopoulos holds a Bachelor of Education from the Thessaloniki University, Greece and a Master of Chemistry and a Ph.D. in Chemistry from Hamburg University, Germany. He is the former Managing Director of BASF Metals Limited and the Global Commercial Vice President of the BASF Precious Metals Service Business. Prior to this, he was the Head of BASF's Refining Catalyst Business for Europe, the Middle East and Africa, based in the United Kingdom.

He has over 30 years' experience in business management, operations management, the gas and oil industry, chemical catalyst manufacturing, e-business, sales and marketing, strategic procurement, and precious metals trading. He has held various senior and executive level management positions with BASF, BP and
W.R. Grace in Germany, the USA and the United Kingdom.

Dr Vergopoulos will be serving as member of the Audit Committee, Risk Committee, Climate Change and Sustainability Committee, and Safety, Health, Environment and Community Committee of Tharisa. He does not hold any other directorships at present.

The Board welcomes Dr Vergopoulos and looks forward to his contribution.

Paphos, Cyprus

28 November 2025

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Investec Bank Limited

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Investor Relations Contacts:

Ilja Graulich (Head of Investor Relations and Communications)

+27 11 996 3500

+27 83 604 0820

[email protected]

Broker Contacts:

Peel Hunt LLP (UK Joint Broker)

Ross Allister / Georgia Langoulant

+44 207 418 8900

BMO Capital Markets Limited (UK Joint Broker)

Thomas Rider / Nick Macann

+44 207 236 1010

Berenberg (UK Joint Broker)

Matthew Armitt / Jennifer Lee / Detlir Elezi

+44 203 207 7800

About Tharisa - delivering on expansion and growth opportunities, commercialising technology solutions

Tharisa is an integrated resource group playing a pivotal role in the global energy transition and the decarbonisation of economies. Leveraging innovation and technology, Tharisa covers the entire value chain-exploration, mining, processing, beneficiation, marketing, sales, and logistics-for platinum group metals (PGMs) and chrome concentrates. The multi-generational Tharisa Mine on the south-western limb of the Bushveld Complex, South Africa-one of the richest sources of PGMs and chrome globally, while development of the Karo Platinum Project, a tier-one PGM project on Zimbabwe's Great Dyke, further reinforces Tharisa's growth strategy. Investments in beneficiation, including chrome and PGM alloy production, add significant downstream value. Tharisa is committed to reducing carbon emissions by 30% by and the sustainability roadmap targets net carbon neutrality by 2050. Through Redox One, Tharisa is advancing proprietary iron chromium redox flow battery technology, utilising the very commodities it mines to support long-duration energy storage-a key component in the transition to renewable energy.

Tharisa plc is listed on the Johannesburg Stock Exchange (JSE: THA) and the London Stock Exchange (LSE: THS, Equity Shares (Transition) Category).