Expl rights for Kyzyltu,Update on Acid from Russia

AIX: KAP, KAP.Y (GDR)

LSE: KAP (GDR)

21 September 2026, Astana, Kazakhstan

Kazatomprom Obtains Exploration rights for the Kyzyltu block and Updates on Sulphuric Acid Supplies from Russia

National Atomic Company Kazatomprom JSC ("Kazatomprom" or the "Company") announces that it has obtained a subsoil use license for uranium exploration at the Kyzyltu block located in Kyzylorda region of the Republic of Kazakhstan. The subsoil use license grants an exclusive right for uranium exploration to Kazatomprom for a period of 6 years.

According to preliminary estimates, uranium resources at the block could amount to approximately 10 thousand tonnes. Exploration works are planned to commence in the near term to further assess the resources and evaluate the block's potential.

"Obtaining the uranium exploration license for the Kyzyltu block represents another consistent step in implementing our strategy to expand the Company's mineral resource base," said Meirzhan Yussupov, CEO of Kazatomprom. "We will continue our systematic exploration of prospective areas in full compliance with all applicable regulatory and environmental requirements, supporting the Company's long-term sustainable development and contributing to the development of the regions where we operate."

Replenishment and efficient use of resource base remains one of Kazatomprom's key strategic priorities. The Company continues to implement its exploration program aimed at maintaining and developing its resource potential, while further strengthening Kazakhstan's position in the global uranium market.

Update on Russian Sulphuric Acid Export Regulations

In response to numerous inquiries from the investment community Kazatomprom provides an update on the temporary measures regulating sulphuric acid exports from the Russian Federation recently announced by the Government of the Russian Federation under Resolution No. 1158 dated 12 September 2026, which amends the Resolution No. 311 of 9 March 2022. Based on the information currently available, these measures do not prohibit sulphuric acid exports. Rather, they introduce a revised approval procedure for export volumes, which is expected to remain in effect until 31 December 2026.

Under the revised procedure, exports remain permissible subject to the relevant approvals. These include individual decisions by the Prime Minister of the Russian Federation or the Deputy Prime Ministers, as well as exports under applicable international transit arrangements and intergovernmental agreements.

Kazatomprom maintains close dialogue with its sulphuric acid suppliers from Russia. Currently, they have confirmed their readiness to fulfil their existing contractual obligations for sulphuric acid deliveries to Kazatomprom in 2026. They have also advised that the documentation required to obtain the necessary export approvals is being submitted to the competent authorities. In addition, the parties are currently negotiating the terms of the sulphuric acid supply for 2027.

At this stage, the Company does not expect the measures to have a material impact on its operations or its production guidance for 2026.

Kazatomprom will continue to monitor developments closely and will inform the market of any material changes affecting its operations or supply arrangements.

For more information, please contact:

Investor Relations Inquiries

Botagoz Muldagaliyeva, Director of Investor Relations

Tel: +7 7172 45 81 80 / 69

Email: [email protected]

Public Relations and Media Inquiries

Daniyar Oralov, Director of Public Relations

Tel: +7 7172 45 80 63

Email: [email protected]

About Kazatomprom

Kazatomprom is the world's largest producer of uranium with the Company's attributable production representing approximately 20% of global primary uranium production in 2025. The Group benefits from the largest reserve base in the industry and operates, through its subsidiaries, JVs and Associates, 27 deposits grouped into 14 mining assets. All of the Company's mining operations are located in Kazakhstan and extract uranium using ISR technology with a focus on maintaining industry-leading health, safety and environment standards.

Kazatomprom securities are listed on the London Stock Exchange and Astana International Exchange. Kazatomprom is the national atomic company in the Republic of Kazakhstan. The Group's primary customers are operators of nuclear power plants, and the principal export markets for the Group's products are countries in Asia, Europe, and the Americas. The Group sells uranium and uranium products under long-term contracts, short-term contracts as well as in the spot market, directly from its headquarters in Astana, Kazakhstan, and through its Switzerland-based trading subsidiary, TH Kazakatom AG (THK).

For more information, please see the Company website at www.kazatomprom.kz.

Forward-looking statements

All statements other than statements of historical fact included in this communication or document are forward-looking statements. Forward-looking statements give the Company's current expectations and projections relating to its financial condition, results of operations, plans, objectives, future performance and business. These statements may include, without limitation, any statements preceded by, followed by or including words such as "target," "believe," "expect," "aim," "intend," "may," "anticipate," "estimate," "plan," "project," "will," "can have," "likely," "should," "would," "could" and other words and terms of similar meaning or the negative thereof. Such forward-looking statements involve known and unknown risks, uncertainties and other important factors beyond the Company's control that could cause the Company's actual results, performance or achievements to be materially different from the expected results, performance or achievements expressed or implied by such forward-looking statements. Such forward-looking statements are based on numerous assumptions regarding the Company's present and future business strategies and the environment in which it will operate in the future.

THE INFORMATION WITH RESPECT TO ANY PROJECTIONS PRESENTED HEREIN IS BASED ON A NUMBER OF ASSUMPTIONS ABOUT FUTURE EVENTS AND IS SUBJECT TO SIGNIFICANT ECONOMIC AND COMPETITIVE UNCERTAINTY AND OTHER CONTINGENCIES, NONE OF WHICH CAN BE PREDICTED WITH ANY CERTAINTY AND SOME OF WHICH ARE BEYOND THE CONTROL OF THE COMPANY. THERE CAN BE NO ASSURANCES THAT THE PROJECTIONS WILL BE REALISED, AND ACTUAL RESULTS MAY BE HIGHER OR LOWER THAN THOSE INDICATED. NONE OF THE COMPANY NOR ITS SHAREHOLDERS, DIRECTORS, OFFICERS, EMPLOYEES, ADVISORS OR AFFILIATES, OR ANY REPRESENTATIVES OR AFFILIATES OF THE FOREGOING, ASSUMES RESPONSIBILITY FOR THE ACCURACY OF THE PROJECTIONS PRESENTED HEREIN.

The information contained in this communication or document, including but not limited to forward-looking statements, applies only as of the date hereof and is not intended to give any assurances as to future results. The Company expressly disclaims any obligation or undertaking to disseminate any updates or revisions to such information, including any financial data or forward-looking statements, and will not publicly release any revisions it may make to the Information that may result from any change in the Company's expectations, any change in events, conditions or circumstances on which these forward-looking statements are based, or other events or circumstances arising after the date hereof.