Tharisa plc Transaction in Own Shares 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') THARISA PLC TRANSACTION IN OWN SHARES Tharisa, the mining, metals, and innovation company dual-listed on the Johannesburg and London stock exchanges, announces that, in accordance with the terms of its share repurchase programme announced on 26 March 2024 (the 'Repurchase Programme'), it purchased the following number of ordinary shares of USD0.001 each in the Company ('Ordinary Shares') through Peel Hunt LLP ('Peel Hunt'). The Ordinary Shares purchased will be held in treasury for a period not exceeding two calendar years from the repurchase date and, unless reissued, will be cancelled. Purchases during the period 4 April 2023 to 12 April 2023 JSE purchases Date of purchase 4 April 2024 to 12 April 2024 Aggregate number of Ordinary Shares purchased on JSE 2 389 Lowest price paid per share (ZAR per share): ZAR14.8300 Highest price paid per share (ZAR per share): ZAR15.0000 Volume weighted average price paid per share (ZAR per share): ZAR14.8327 The aggregate number of shares purchased on the JSE in terms of the Repurchase Programme since 2 April 2024 is 2 813 shares at an average price of ZAR14.6738 per share and a total cost (including dealing and associated costs) of ZAR41 277.40. London Stock Exchange ('LSE') purchases Date of purchase 4 April 2024 to 12 April 2024 Aggregate number of Ordinary Shares purchased on LSE 190 000 Lowest price paid per share (pence per share): 61.00 pence Highest price paid per share (pence per share): 65.50 pence Volume weighted average price paid per share (pence per share): 64.55 pence The aggregate number of shares purchased on the LSE in terms of the Repurchase Programme since 4 April 2024 is 190 000 shares at an average price of 64.55 pence per share and a total cost (including dealing and associated costs) of GBP122 650.00. Correction of announcement released on 4 April 2024 The announcement released on 4 April 2024 had overstated the number of shares purchased by the Company by three (3) shares. The table below reflects the correct number of shares purchased and the correct price information. Johannesburg Stock Exchange ('JSE') purchases Date of purchase 2 April 2024 Number of Ordinary Shares purchased on JSE 424 Lowest price paid per share (ZAR per share): ZAR13.7800 Highest price paid per share (ZAR per share): ZAR13.7800 Volume weighted average price paid per share (ZAR per share): ZAR13.7800 Following the purchases during this period and taking into account the correction of the shares repurchased on 2 April 2024, the Company has 302 596 743 Ordinary Shares in issue, of which 2 759 405 Ordinary Shares are held in treasury. The total number of voting rights in Tharisa is therefore 299 837 338. This figure may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the FCA's Disclosure Guidance and Transparency Rules. The information contained in this update is the responsibility of the board of directors and has not been reviewed or reported on by the Group's external auditors. During any of Tharisa's closed periods, Peel Hunt will make trading decisions in relation to the Company's securities independently of the Company. Any share purchases during these periods will be undertaken within certain pre-set parameters and in accordance with the Company's general authority to repurchase shares. Paphos, Cyprus 15 April 2024 JSE Sponsor Investec Bank Limited Connect with us on LinkedIn to get further news and updates about our business. Investor Relations Contacts: Ilja Graulich (Head of Investor Relations and Communications) +27 11 996 3500 +27 83 604 0820 igraulich@tharisa.com 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 Tharisa Mine, located in the south-western limb of the Bushveld Complex, South Africa. The mine has a 13-year open pit life and is strategically advancing the vast mechanised underground resource which extends for over 60 years. Tharisa is developing the Karo Platinum Project, a low-cost, open-pit PGM asset located on the Great Dyke in Zimbabwe. The Company is committed to reducing its carbon emissions by 30% by 2030 and the development of a roadmap to become net carbon neutral by 2050. As part of this energy transition, the 40 MW solar project adjacent to the Tharisa Mine is well advanced. 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 the Main Board of the London Stock Exchange (LSE: THS). Date: 15-04-2024 02:30:00 Produced by the JSE SENS Department. The SENS service is an information dissemination service administered by the JSE Limited ('JSE'). The JSE does not, whether expressly, tacitly or implicitly, represent, warrant or in any way guarantee the truth, accuracy or completeness of the information published on SENS. 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