Notice of the Extraordinary General Meeting of Shareholders

National Atomic Company “Kazatomprom” JSC (the “Company” or “Kazatomprom”), legal address: 17/12 Syganak Street, Nura District, Astana, Z05T1X3, the Republic of Kazakhstan, hereby notifies the Company shareholders of its absentee Extraordinary General Meeting of Shareholders (the “Meeting”) in accordance with Articles 35-41, 43-47, 49-52 of the Law of the Republic of Kazakhstan “On Joint Stock Companies” (the Law “On Joint Stock Companies”).

Date and time when the list of shareholders entitled to participate in the Meeting will be compiled: 11 September 2026 at 00:00 local time (GMT+5).

Start date for submitting absentee voting ballots: 22 September 2026.

Closing date for submitting absentee voting ballots: 6 October 2026, at 18:00 local time (GMT+5).

Date of counting the results of absentee voting: 7 October 2026 by 18:00 local time (GMT+5).

The notice of the upcoming Meeting, as well as the ballot for absentee voting will be available on the Company's website in accordance with the Law “On Joint Stock Companies” and the Company’s Charter.

Agenda of the Extraordinary General Meeting of Shareholders:

1. On concluding a transaction, which in aggregate with interrelated transactions is a major transaction, in which Kazatomprom has an interest – the Spot-term contract for the sale and purchase of natural uranium concentrates with State Nuclear Uranium Resource Development Company Limited.

2. On concluding a major transaction in which Kazatomprom has an interest – the Сontract for the supply of natural uranium in the form of U₃O₈ with Uranium One Group JSC.

3. On the composition of the Board of Directors of Kazatomprom.

The Meeting on the agenda items No.1 and 2 is convened at the initiative of the Board of Directors of Kazatomprom (Minutes No. 11/26 dated 20 August 2026). The Meeting on the agenda item No. 3 is convened at the initiative of a major shareholder of the Company – Samruk-Kazyna, holding 163,377,456 ordinary shares of the Company (decision of the Management Board of Samruk-Kazyna No.45/26 dated 18 August 2026).

On concluding a transaction, which in aggregate with interrelated transactions is a major transaction, in which Kazatomprom has an interest – the Spot-term contract for the sale and purchase of natural uranium concentrates with State Nuclear Uranium Resource Development Company Limited

Kazatomprom and State Nuclear Uranium Resource Development Company Limited (“SNURDC”) have reached an agreement on the sale of natural uranium concentrates in the form of U₃O₈. Kazatomprom, the seller, is expected to execute the sale to SNURDC, the buyer, via physical delivery to the Alashankou railway station (China).

SNURDC is a subsidiary of State Power Investment Corporation Limited (“SPIC”), responsible for the supply of uranium and fuel assemblies to SPIC, with a mandate to invest in research, development, and exploration of uranium ore. In December 2017, SNURDC obtained a state license to import natural uranium concentrates. In turn, SPIC is authorized by the State Council of the People’s Republic of China to conclude contracts for the transfer of technologies for the construction of third-generation nuclear power plants, including the implementation of appropriate engineering design and management. SPIC serves as a key platform for the implementation of AP1000 technologies in Westinghouse projects.

The Company’s commercial offer was accepted by SNURDC during its validity period, after which the parties jointly agreed on a draft Spot-term contract for the sale and purchase of natural uranium concentrates. The details of the transaction in terms of pricing, volumes and delivery schedules cannot be disclosed due to confidentiality terms. Furthermore, SNURDC insists on maintaining the confidentiality of transaction terms. The transaction parameters comply with current market conditions and prevailing market trends.

On concluding a major transaction in which Kazatomprom has an interest – the Сontract for the supply of natural uranium in the form of U₃O₈ with Uranium One Group JSC

Kazatomprom and Uranium One Group JSC (“Uranium One”) have reached an agreement on the sale of natural uranium concentrates in the form of U₃O₈. Kazatomprom, the seller, is expected to execute the sale to Uranium One, the buyer, via physical delivery to the Siberian Chemical Plant JSC (Russian Federation).

Uranium One is an international group of companies within the management framework of Rosatom State Corporation (“Rosatom”) as part of the International Asset Management division (which includes TENEX). The company acts as the key operator for managing Rosatom’s foreign uranium mining assets and is responsible for the strategic development of its mineral resource base abroad. Uranium One is one of the largest uranium producers in the world, consistently holding a leading position in global production rankings. Uranium One is also a shareholder in the Company’s joint ventures (JV South Mining Chemical Company LLP, JV Akbastau JSC, and Karatau LLP).

The Company’s commercial offer was accepted by Uranium One during its validity period, after which the parties jointly agreed on a draft Contract for the supply of natural uranium in the form of U₃O₈. The details of the transaction in terms of pricing, volumes and delivery schedules cannot be disclosed due to confidentiality terms. Furthermore, Uranium One insists on maintaining the confidentiality of transaction terms. The transaction parameters comply with current market conditions and prevailing market trends.

Composition of the Board of Directors of Kazatomprom

Due to the appointment of Mr. Yelzhas Otynshiyev, a member of the Company’s Board of Directors (the “Board”) representing the interests of Samruk-Kazyna JSC (the “Fund”), as Chairman of the Management Board of Kazakhstan Temir Zholy, his powers as a member of the Company’s Board will be terminated. At the initiative of the Company’s majority shareholder, Samruk‑Kazyna, the Meeting needs to review the early termination of Mr. Otynshiyev’s tenure. To replace him, the Meeting will consider the appointment of Zhandos Kairgeldi, co-Managing Director for Strategy and Asset Management at the Samruk-Kazyna, to the Company’s Board as a representative of the Fund’s interests for the remainder of the current Board’s term.

Materials for the Meeting according to the agenda will be available to shareholders no later than ten days before the date of the Meeting at the Company’s headquarters in accordance with clause 4 of Article 44 of the Law “On Joint Stock Companies”. Upon request, physical copies of the Meeting materials will be sent within three business days of receipt of such a request. The costs of making copies of documents and delivering documents are borne by the shareholder. Requests from the Company’s shareholders must be received at the actual address of the Company in the way prescribed by the legislation of the Republic of Kazakhstan.

The procedure for conducting absentee voting:

• When voting by an absentee ballot, a shareholder shall indicate his/her full name/name of a legal entity, the number of voting shares, and shall choose one of the voting options.
• An absentee ballot shall be signed by a shareholder – an individual (or a representative of a shareholder – an individual), who shall indicate his/her identity document (ID / passport number, date of issue, issuing authority, and individual identification number (IIN)). A shareholder shall also provide a copy of his/her identity document.
• If on behalf of shareholders – legal entities, their sole executives take part in the Meeting, they shall submit notarized copies of documents confirming their election or appointment to their role, as well as a copy of an identity document.
• An absentee voting ballot of a shareholder – a legal entity shall be signed by its CEO (a representative of a shareholder – a legal entity).
• An absentee voting ballot which is not signed by a shareholder – an individual, or the CEO of a shareholder – a legal entity or a representative of a shareholder – an individual, or a representative of a shareholder – a legal entity shall be deemed invalid.
• Only one voting option shall be marked in the ballot.
• The absentee ballot shall be received by the Company or delivered by courier to the Kazatomprom’s office by 18:00 local time (GMT+5) on 6 October 2026 at the following address: 17/12 Syganak Street, Nura District, Astana, Z05T1X3, Republic of Kazakhstan.
• In case of signing a ballot for absentee voting by the representative of the shareholder, the ballot for absentee voting is followed by the copy of power of attorney or other document confirming the powers of the shareholder’s representative.
• For vote counting, only those votes on the agenda items are counted where a shareholder (or a representative of a shareholder) followed the procedure of voting prescribed in the ballot, and only one of the voting options was marked.
• The Meeting may consider and make decisions on the agenda items only if the shareholders (or representatives of shareholders), included in the list of shareholders entitled to participate and vote, and owning in total fifty or more percent of voting shares of the Company, were registered as of the date or on the closing date for submission of ballots.
• The list of the Company’s shareholders entitled to participate and vote at the Meeting is compiled by the Central Securities Depository JSC based on the data of Kazatomprom’s shareholders register system.
• If, after compiling a list of shareholders entitled to participate and vote at the Meeting, a person included in such a list alienated his/her voting shares, the right to participate in the Meeting is transferred to a new shareholder. In such a case, the documents confirming the ownership of the shares shall be submitted.
• Any shareholder of Kazatomprom has the right to participate in the management of the Company in the manner prescribed by Law of the Republic of Kazakhstan “On Joint-Stock Companies” and the Charter of the Company.
• The holders of Global Depositary Receipts are entitled to vote at the Meeting on behalf of the beneficial owners in relation to the deposited shares, provided that identification and other information required by the applicable Kazakhstan law on such beneficial owners, has been submitted to the Central Securities Depository JSC through the Depositary (Citibank N.A.).

For more information, please contact:

Extraordinary General Meeting of Shareholders Inquiries

Maira Tnymbergenova, Corporate Secretary

Tel.: +7 7172 45 82 84

Email: mtnymbergenova@kazatomprom.kz

Investor Relations Inquiries

Botagoz Muldagaliyeva, Director of Investor Relations

Tel.: +7 7172 45 81 80/69

Email: ir@kazatomprom.kz

Public Relations and Media Inquiries

Daniyar Oralov, Director of Public Relations

Tel.: +7 7172 45 80 63

Email: pr@kazatomprom.kz

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.