Notice of the Board of Directors of the Budapest Stock Exchange Plc. on the convening of the annual general meeting

(seat: 6th Floor, Krisztina krt. 55., H-1013, Budapest, company registration number Cg. 01-10-044764, registered by the Court of Registration of Budapest; hereinafter: "BSE")

convenes its annual General Meeting at 2:00 p.m. on April 27, 2026Place of the General Meeting:

Agenda of the General Meeting:

1. Report of the Board of Directors on the activities of the Company in the business year of 2025 and on the Company's assets and the Company's business policy
2. Report of the Supervisory Board on the activities in the business year of 2025
3. Report of the Auditor for the business year of 2025
4. Establishment of the IFRS report prepared in compliance with the Accounting Act for the business year of 2025
5. Proposal for the distribution of the profit for the business year of 2025 and the decision on dividend
6. The 2025 Corporate Governance Report of the Budapest Stock Exchange Plc.
7. Voting expressing an opinion on the 2025 Remuneration Report
8. Election of a member of the Board of Directors and determination of the remuneration
9. Election of the Chairman of the Board of Directors and determination of the remuneration
10. Election of the members of the Supervisory Board and determination of their remuneration
11. Election of the Chairman of the Supervisory Board and determination of the remuneration
12. Adoption of the strategy of the Budapest Stock Exchange Plc. for the years 2026-2028
13. Capital increase in BÉTx Pénzügyi Zártkörűen Működő Részvénytársaság

Date of rescheduled general meeting in case of lack of quorum:

In case there is no quorum at the General Meeting, the Board calls for a rescheduled General Meeting to be held with the same agenda and at the same place at 2:00 p.m. on 11 May 2026. The rescheduled General Meeting shall be regarded as having a quorum for all issues included in the original agenda, regardless of the number of shareholders attending.

Availability of the proposals and the draft resolutions related to the agenda:

The proposals and the draft resolutions related to the agenda are published on the BSE's website (https://bse.hu/investor-relations) at least 21 days before the start of the general meeting.

The right to request additional items for the agenda of the general meeting:

The right to request additional items for the agenda of the general meeting may be exercised by such shareholders controlling at least one per cent of the votes within eight days following the publication of the announcement on convening the general meeting. In accordance with the provisions of the Civil Code, where

a group of shareholders together controlling at least one per cent of the votes propose certain additions to the agenda in accordance with the provisions on setting the items of the agenda, or table draft resolutions for items included or to be included on the agenda, the matter proposed shall be construed to have been placed on the agenda if such proposal is delivered to the Board of Directors within eight days following the time of publication of present announcement for the convocation of the general meeting, and the Board of Directors publishes an announcement on the amended agenda, and on the draft resolutions tabled by shareholders upon receipt of the proposal.

Conditions for participation and exercising voting rights at the general meeting:

BSE requests shareholders' identification from KELER Központi Értektár Zartkörűen Működő Reszvénytársaság (hereinafter: KELER Zrt.) for the date of the General Meeting (including the rescheduled general meeting) as a corporate event. The record date of the shareholders' identification shall be April 20, 2026. The rules of the shareholders' identification are contained in the regulations of KELER Zrt.

On the second working day before the day of the General Meeting (including the rescheduled general meeting),

i.e. on April 23, 2026 at 4:00 p.m., BSE will delete all the data in the share register based on the shareholder's identification carried out for the above record date, and at the same time registers the data corresponding to the result of the shareholder's identification it in the share register, closes the share register, and does not complete a registration request until the day after the General Meeting has been convened.

The securities account managers shall be responsible for registering the shareholders in the Share Register upon instruction of such shareholders. The securities account managers shall provide information to the shareholders on the deadlines for giving instructions to the securities account managers.

Shareholders may inspect and obtain information in respect of their registration in person (1074 Budapest, Rákóczi út 70-72., R-70 Office Building) - at the time as agreed previously via e-mail kelertesem@keler.hu -after identification. Closing the Share Register does not restrict the right of the persons registered in the Share Register to transfer their shares following the closing date. Transferring shares prior to the general meeting does not deprive the persons registered in the Share Register of their rights to participate in the general meeting and exercise their rights they are entitled to as shareholders.

We call the shareholders attention to that in accordance with Art. 355, Paragraphs (3)-(4) of Law CXX of the year 2001, on Capital Markets (CMA), the identifying data on indirect holdings in the BSE of shareholders with at least five per cent of the shares shall be also recorded, as an annex to the shareholders' register of the BSE. Shareholders having or acquiring a five per cent or higher ownership stake in the BSE are obligated to report this, (with the simultaneous disclosure of their identifying data), to the registrar of the shareholders' register. The shareholder who fails to comply with this reporting obligation shall not be allowed to use his/her voting rights until the fulfilment of this obligation.

In case the share has several holders and the joint representative has been registered in the shareholder's register, the joint representative exercises the shareholder's rights at the general meeting. The general meeting shall have a quorum if the holders of shares representing more than half of the voting rights are present. One share with a nominal value of HUF 100 (i.e. One Hundred Hungarian forints) entitles the shareholders to one vote.

Participation in person, through or through a proxy issued or by nominee:

The General Meeting will be held with the personal appearance of those entitled to participate. Shareholders shall be entitled to participate in the general meeting either in person or through a proxy issued or by nominee in accordance with the provisions of the Civil Code and the CMA. BSE or its representative checks the identity of the shareholder, their representative and/or proxy based on documents before admission to the General Meeting.

The shareholder can also give a power of attorney on a form, the form can be found on the BSE's website (https://bse.hu/investor-relations).

The power of attorney for the nominee shall be prepared in the form of a public document or a private document with full probative force taking into account any international agreement or reciprocity between Hungary and the country where the document was issued. If the power of attorney is prepared in any language other than Hungarian a certified Hungarian translation thereof shall be attached.

A representative may represent several shareholders, however, they must have the power of attorney corresponding to the above for each represented shareholder.

The auditor cannot be an authorized representative, however - differently to the provisions of Section 3:255.(1) of the Civil Code - the member of the board of directors, the CEO, the company manager, the manager of the joint-stock company and the member of the supervisory board can act as an authorized representative on behalf of the shareholder. A representative can represent several shareholders, and a shareholder can authorize a separate representative for each securities account. If the shareholder is represented by several representatives, and they vote or make statements differently from each other, the vote cast or the statement made by all of them is considered null and void. The power of attorney covers the continuation of the suspended general meeting and the rescheduled general meeting convened due to the lack of a quorum.

The right of representation of persons acting on behalf of shareholders who are not natural persons must be verified with an original document from a public register (e.g. company extract, court extract) dated no older than 30 days from the date of the general meeting. If the document confirming the right to represent was issued in a language other than Hungarian, an authentic Hungarian translation must be attached.

The shareholder representative of the Magyar Nemzeti Bank, in accordance with the provisions of the founding deed of the Magyar Nemzeti Bank, proves their right of representation with a power of attorney signed by the president of the Magyar Nemzeti Bank, or jointly signed by two of the other employees with powers of representation, and in case of physical signature, a record sheet containing the sample signatures of the signatories. According to Section 10 (8) of Act CXXXIX of 2013 on the Hungarian National Bank, the president of the MNB shall be replaced by the deputy president of the Monetary Council in the event of his/her absence. The MNB shall prove his/her right of representation by means of a power of attorney signed electronically or physically as above, or in the case of a physical signature, by means of a registration form containing the specimen signature of the signatory(s), and by means of a copy of the effective founding document of the MNB.

Procedural rules for registration at the General Meeting:

Registration at the General Meeting takes place from 1:00 p.m., which will continue during the General Meeting.

Rules of voting:

Voting will be machine voting at the General Meeting.

This announcement of the general meeting is published in Hungarian and English, in case of any discrepancy, the Hungarian version shall prevail.

If you have any questions, contact Dániel Körmöczi, BSE's Investor Contact, at the following contact details: email: kormoczid@bse.hu, phone: +361 429 6700

Board of Directors of Budapest Stock Exchange