Investor presentation on Underground Expansion

Tharisa plc

(Incorporated in the Republic of Cyprus with limited liability)

(Registration number HE223412)

JSE share code: THA

LSE share code: THS

A2X share code: THA

ISIN: CY0103562118

LEI: 213800WW4YWMVVZIJM90

('Tharisa' or the 'Company')

INVITATION TO AN Investor Presentation via Investor Meet Company ON THARISA'S PHASED TRANSITION TO UNDERGROUND MINING

Tharisa is pleased to announce that CEO Phoevos Pouroulis and members of the Tharisa Minerals' management team will provide a live presentation via Investor Meet Company on Friday, 03 October 2025, at 10:00 (Johannesburg UTC +2) and 09:00 (London UTC + 1) on the Company's phased transition to underground mining.

The presentation is open to all existing and potential shareholders. Questions can be submitted pre-event via your Investor Meet Company dashboard up until 02 October 2025, 09:00 (Johannesburg UTC + 2) and 08:00 (London UTC + 1), or at any time during the live presentation.

Investors can sign up to Investor Meet Company for free and add to meet THARISA PLC via:

https://www.investormeetcompany.com/tharisa-plc/register-investor

Investors who already follow THARISA PLC on the Investor Meet Company platform will automatically be invited.

Paphos, Cyprus

30 September 2025

JSE Sponsor

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

Tharisa is an integrated resource group critical to the energy transition and decarbonisation of economies. It incorporates exploration, mining, processing and the beneficiation, marketing, sales, and logistics of PGMs and chrome concentrates, using innovation and technology as enablers. Its principal operating asset is the multi-generational Tharisa Mine, located in the south-western limb of the Bushveld Complex, South Africa. Tharisa is also developing the Karo Platinum Project, a tier-one PGM asset located on the Great Dyke in Zimbabwe, while simultaneously focusing on beneficiation in the form of chrome and PGM alloys. Redox One is accelerating the development of a proprietary iron chromium redox flow long-duration battery utilising the commodities we mine. Tharisa plc is listed on the Johannesburg Stock Exchange (JSE: THA) and has an Equity Shares (Transition) Category listing on the London Stock Exchange (LSE: THS).