Hyloris Pharmaceuticals SA — AGM Information 2026

May 8, 2026

Hyloris Pharmaceuticals SA
Public limited liability company (société anonyme/naamloze vennootschap)
Boulevard Patience et Beaujonc 3/1
4000 Liège
Belgium
Register of Legal Entities: 0674.494.151 (Liège, division Liège)
(the "Company")

NOTICE CONVENING THE ANNUAL SHAREHOLDERS' MEETING OF 9 JUNE 2026

The Company's board of directors (the "Board of Directors") is pleased to invite its shareholders and subscription rights holders to attend the annual shareholders' meeting (the "Annual Shareholders' Meeting") that will be held:

on 9 June 2026 at 14:00 (Belgian time)

at Boulevard Patience et Beaujonc 3/1, 4000 Liège, Belgium.

There is no attendance quorum requirement for the deliberation and vote on the agenda items referred to in the agenda of the Annual Shareholders' Meeting. The resolutions proposed in the agenda will be passed if a majority of the votes validly cast approves them.

For the Annual Shareholders' Meeting, the Company invites all participants to exercise their rights in one of the following manners:

1. Vote electronically ahead of the Annual Shareholders' Meeting; or
2. Vote by letter ahead of the Annual Shareholders' Meeting; or
3. Representation by proxy at the Annual Shareholders' Meeting; or
4. Physical participation at the Annual Shareholders' Meeting.

For all participation modes mentioned above, please follow the instructions in the relevant sections: Vote Electronically – Vote by Letter – Representation by Proxy – Physical Participation. These contain the modalities under which you can participate in the Annual Shareholders' Meeting.

The Company recommends asking questions in writing ahead of the Annual Shareholders' Meeting. However, questions can also be asked during the Annual Shareholders' Meeting. For more information, please consult the section Right to Ask Questions.

The Board of Directors reminds all participants that they must satisfy the conditions under the section: Formalities for Participation.

Subscription right holders can attend the Annual Shareholders' Meeting with an advisory vote. Subscription right holders may also opt for one of the four participation modes: Vote Electronically – Vote by Letter – Representation by Proxy – Physical Participation. These contain the modalities under which you can participate in the Annual Shareholders' Meeting. Questions can be asked ahead of the Annual Shareholders' Meeting in writing or during the Annual Shareholders' Meeting in accordance with section: Right to Ask Questions.

The Board of Directors reminds all subscription right holders that they must satisfy the conditions under the section: Formalities for Participation.

ANNUAL SHAREHOLDERS' MEETING

The Annual Shareholders' Meeting will be held on 9 June 2026 at 14:00 (Belgian time) at the Company's

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registered office.

The applicable registration and voting formalities relating to the Annual Shareholders' Meeting are set forth below.

AGENDA AND PROPOSED RESOLUTIONS

AGENDA

1. Take cognizance of the Board of Directors' annual report for the financial year ending on the 31st of December 2025.
2. Take cognizance of the statutory auditor's audit report for the financial year ending on the 31st of December 2025.
3. Approve the non-consolidated annual accounts for the financial year ending on the 31st of December 2025 and approve the profit-and-loss allocation set out therein.
4. Take cognizance of the Board of Directors' and the statutory auditor's reports on the consolidated annual accounts for the financial year ending on the 31st of December 2025.
5. Take cognizance of the consolidated annual accounts for the financial year ending on the 31st of December 2025.
6. Grant discharge to the directors.
7. Grant discharge to the statutory auditor.
8. Vote (advisory vote) on the remuneration report for the financial year ending on the 31st of December 2025.
9. Approve the amended remuneration policy 2026-2029.
10. Grant power of attorney for the performance of formalities.

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PROPOSED RESOLUTIONS

1. Take cognizance of the Board of Directors' annual report for the financial year ending on the 31st of December 2025

This agenda item does not require a resolution.

1. Take cognizance of the statutory auditor's audit report for the financial year ending on the 31st of December 2025

This agenda item does not require a resolution.

1. Approve the non-consolidated annual accounts for the financial year ending on the 31st of December 2025 and approve the profit-and-loss allocation set out therein

Proposed resolution

It is proposed to approve the non-consolidated annual accounts for the financial year ending on the 31st of December 2025 and the profit-and-loss allocation set out therein as proposed by the Board of Directors. The profit-and-loss allocation is as follows:

Loss of financial year 2025 EUR 1,205,801

Loss carried forward from the previous financial year EUR 33,297,781

Loss to carry forward EUR 34,503,582

1. Take cognizance of the Board of Directors' and the statutory auditor's reports on the consolidated annual accounts for the financial year ending on the 31st of December 2025

This agenda item does not require a resolution.

1. Take cognizance of the consolidated annual accounts for the financial year ending on the 31st of December 2025

This agenda item does not require a resolution.

1. Grant discharge to the directors

Proposed resolution

It is proposed that discharge be granted to each director in respect of his/her/its mandate for the financial year ending on the 31st of December 2025.

1. Grant discharge to the statutory auditor

Proposed resolution

It is proposed that discharge be granted to the statutory auditor, BDO Bedrijfsrevisoren BV | BDO Réviseurs d'Entreprises SRL, represented by Mr. Christophe Pelzer, in respect of its duties for the financial year ending on the 31st of December 2025.

1. Vote (advisory vote) on the remuneration report for the financial year ending on the 31st of December 2025

Proposed resolution

It is proposed to approve the remuneration report for the financial year ending on 31 December 2025 as elaborated in the annual report in the subsection Corporate Governance –

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Hyloris

Remuneration Report (p. 85 and following). The 2025 annual report is available on the Company's website at https://hyloris.com/2025-annual-report/.

9. Approve the amended remuneration policy 2026-2029

The current Remuneration Policy was approved at the Annual Shareholders' Meeting of 11 June 2024.

Upon recommendation of the Remuneration and Nomination Committee, the Board of Directors has prepared an amended Remuneration Policy 2026-2029, which is available on the Company's website on the following address: https://hyloris.com/shareholders-meeting-2026/. If the Annual Shareholders' Meeting does not approve the proposed new policy, the Company will continue to remunerate its directors, other executives and day-to-day management delegates in accordance with the existing approved policy.

Proposed resolution

It is proposed to approve the amended remuneration policy 2026-2029.

10. Grant power of attorney for the performance of formalities

Proposed resolution

It is proposed that special powers be granted to Sybefica Invest BV/SRL (Vincent Van Dessel), director, and to Marion Baine and Machias Tas (attorney with Eubelius BV/SRL) and Silke De Greef (paralegal assistant with Eubelius BV/SRL), as well as, more generally, all attorneys and paralegal assistants of Eubelius BV/SRL, to allow them to act individually, and with full power of substitution and sub-delegation, to perform in the name and on behalf of the Company all formalities pertaining to the publication obligations imposed by law regarding the resolutions adopted at the Annual Shareholders' Meeting and, more particularly, to publish an excerpt of these minutes in the Annexes to the Belgian Official Gazette and, generally, to perform all steps at the Clerk's office of the Court of Enterprises and everything necessary for these purposes.

To the extent permitted by law, the undersigned waives any liability claim against the attorney(s)-in-fact (as well as the substitutes and subdelegates) and undertakes to indemnify them for any damage they may incur because of any act carried out in relation to this power of attorney.

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FORMALITIES FOR PARTICIPATION

The Board of Directors reminds all shareholders that the Registration Condition and Notification Condition, set out below, must be cumulatively fulfilled in order to be allowed to attend the Annual Shareholders' Meeting and vote on the agenda items at the Annual Shareholders' Meeting. In accordance with article 25 of the Company's articles of association and article 7:135 BCCA, holders of profit-sharing certificates, convertible bonds, subscription rights or certificates issued with the cooperation of the Company (if any) are entitled to attend the Annual Shareholders' Meeting and cast an advisory vote if they meet mutatis mutandis the admission criteria for shareholders.

Registration condition

Condition 1: Only persons whose ownership of shares of the Company is registered on 26 May 2026 at midnight (24:00) (Belgian time) (the "Registration Date") are entitled to participate and vote at the Annual Shareholders' Meeting. The ownership of shares on the Registration Date is determined as follows:

(i) for registered shares: if the name of the shareholder is recorded in the Company's register of registered shares;

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(ii) for dematerialised shares: if the name of the shareholder is recorded in the accounts of a recognised account holder or recorded in the accounts of the central securities depository. A certificate must be issued as proof hereto.

Only persons who are shareholders on the Registration Date will be entitled to attend and vote at the Annual Shareholders' Meeting.

Notification condition

Condition 2: The owner of shares who meets condition 1 must also notify the Company about its intention to participate at the Annual Shareholders' Meeting by not later than 3 June 2026 (date of receipt by the Company). Shareholders can do so in one of the following manners:

(i) for shareholders who opt to vote electronically ahead of the Annual Shareholders' Meeting, via www.abnamro.com/evoting (or in the event of the intervention of a financial intermediary, via www.abnamro.com/intermediary): notify the Company of your intention to participate by registering via the aforementioned platform in accordance with section: Vote Electronically. The completed electronic registration will serve as notification of your intention to participate in the Annual Shareholders' Meeting.

(ii) for shareholders who opt to vote by letter ahead of the Annual Shareholders' Meeting: notify the Company of your intention to participate by sending your vote by letter form to the Company in accordance with section: Vote by Letter. The receipt of the vote by letter form will serve as notification of your intention to participate in the Annual Shareholders' Meeting.

(iii) for shareholders who opt to grant a proxy to be represented at the Annual Shareholders' Meeting: notify the Company of your intention to participate by sending your proxy form to the Company in accordance with section: Representation by Proxy. The receipt of the proxy form will serve as notification of your intention to participate in the Annual Shareholders' Meeting.

(iv) for shareholders who opt for Physical Participation: notify the Company of your intention to participate by email to corporate@hyloris.com, by post to Hyloris Pharmaceuticals SA, Boulevard Patience et Beaujonc 3/1, 4000 Liège, Belgium, to the attention of Mrs. Ann De Jaeger, Chief Legal Officer of the Company, or electronically to ABN AMRO Bank N.V. ("ABN AMRO") via www.abnamro.com/evoting (or in the event of the intervention of a financial intermediary, via www.abnamro.com/intermediary). Sending electronically to ABN AMRO via www.abnamro.com/evoting is recommended.

Holders of dematerialised shares, in addition to the above steps, must evidence to the Company that they effectively hold the number of dematerialised shares on Registration Date with which they would like to participate in the Annual Shareholders' Meeting in the following manner:

(i) obtain (from your financial intermediary) a certificate from a recognised account holder or the central securities depository that proves the number of dematerialised shares that is registered in the name of the shareholder in its account on Registration Date and for how many of these shares an instruction has been given to participate in the Annual Shareholders' Meeting; and

(ii) send this certificate by email to corporate@hyloris.com, by post to Hyloris Pharmaceuticals SA, Boulevard Patience et Beaujonc 3/1, 4000 Liège, Belgium, to the attention of Mrs. Ann De Jaeger, Chief Legal Officer of the Company or electronically to ABN AMRO via www.abnamro.com/evoting (or in the event of the intervention of a financial intermediary, via www.abnamro.com/intermediary). Sending electronically to ABN AMRO via www.abnamro.com/evoting is recommended.

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Hyloris

In the event of an electronic notice to ABN AMRO, the authorised account holder or the central security depository must provide the certificate electronically via www.abnamro.com/intermediary, confirming the number of dematerialised shares that is registered in the name of the shareholder in its account on the Registration Date and for how many of these shares an instruction has been given to participate in the Annual Shareholders' Meeting. In that case, the authorised account holders and the central security depository are requested to provide the full address details of the beneficial owners concerned to allow us to verify the shareholding on the Registration Date efficiently.

VOTE ELECTRONICALLY

In accordance with article 27 of the Company's Articles of Association, the Company allows its shareholders to vote electronically ahead of the Annual Shareholders' Meeting.

Shareholders may cast their vote electronically via www.abnamro.com/evoting (or in the event of the intervention of a financial intermediary, via www.abnamro.com/intermediary) by no later than 8 June 2026.

VOTE BY LETTER

In accordance with article 27 of the Company's Articles of Association, the Company allows its shareholders to vote by letter ahead of the Annual Shareholders' Meeting.

Votes by letter must be cast by no later than 3 June 2026 (date of receipt by the Company). Shareholders must use the designated form to vote by letter. You can download this vote by letter form from the Company's website on https://hyloris.com/shareholders-meeting-2026/, or obtain it from the Company's registered office at Boulevard Patience et Beaujonc 3/1, 4000 Liège, Belgium. It is recommended to download the form from the Company's website.

Signature

This vote by letter form must be signed by hand or electronically. If you choose the second option, you must use an electronic signature in the sense of Regulation (EU) No 910/2014 of the European Parliament and of the Council of 23 July 2014 on electronic identification and trust services for electronic transactions in the internal market and repealing Directive 1999/93/EC.

Dispatch

The completed, dated and signed vote by letter form must be sent to the Company by email to corporate@hyloris.com or by post to Hyloris Pharmaceuticals SA, Boulevard Patience et Beaujonc 3/1, 4000 Liège, Belgium, to the attention of Mrs. Ann De Jaeger, Chief Legal Officer of the Company. Sending by email is recommended. For dematerialised shareholders, please send this vote by letter form together with the certificate obtained from a recognised accountholder or the central securities depository.

The Board of Directors reminds all shareholders who wish to cast a vote by letter that they must comply with the formalities for attending the Annual Shareholders' Meeting (please see section: Formalities for Participation above).

REPRESENTATION BY PROXY

Shareholders who wish to be represented at the Annual Shareholders' Meeting are proposed to grant a proxy to Mr. Stefan Yee, Chairman of the Board of Directors, who will be physically present at the Annual Shareholders' Meeting, or they may grant powers to a proxy holder of their choice.

Shareholders who wish to appoint a proxy holder must do so in accordance with the applicable rules of Belgian law. This includes the rules on conflicts of interest and the keeping of a register. Since the proxy holder proposed by the Company falls under the potential conflict-of-interest rules of article

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Hyloris

7:143, §4 BCCA, you must give voting instructions to the proposed proxy holder for each of the agenda items. If you do not give voting instructions for all agenda items or if, for whatever reason, there is lack of clarity on the voting instructions given, the proposed proxy holder will abstain from voting.

The Board of Directors reminds all shareholders who wish to be represented by a proxy holder that they must comply with the formalities for attending the Annual Shareholders’ Meeting (please see section: Formalities for Participation above).

Appointment of a proxy holder

If you want to appoint a proxy holder, please complete the proxy form and submit it to the Company by no later than 3 June 2026 (date of receipt by the Company). Shareholders must use the designated form to grant a proxy. You can download this proxy form from the Company's website on https://hyloris.com/shareholders-meeting-2026/ or obtain it at the Company's registered office at Boulevard Patience et Beaujonc 3/1, 4000 Liège, Belgium.

Furthermore, an electronic proxy is available to the shareholders who have registered electronically, by using the ABN AMRO platform (www.abnamro.com/evoting) where the shareholder can issue a proxy with voting instructions to Mr. Stefan Yee, Chairman of the Board of Directors via an electronic form. The electronic proxy must be received by ABN AMRO on 3 June 2026 at the latest.

Signature

The proxy form must be signed by hand or electronically. If you choose the second option, the electronic signature must satisfy the same requirements that are set out above under the section: Vote by Letter (sub-section Signature).

Dispatch

The completed, dated and signed proxy form must be sent to the Company by email to corporate@hyloris.com, by post to Hyloris Pharmaceuticals SA, Boulevard Patience et Beaujonc 3/1, 4000 Liège, Belgium, to the attention of Mrs. Ann De Jaeger, Chief Legal Officer of the Company, or electronically to ABN AMRO via www.abnamro.com/evoting. Sending electronically to ABN AMRO via www.abnamro.com/evoting is recommended. For dematerialised shareholders, please send this proxy form together with the certificate obtained from a recognised accountholder or the central securities depository.

PHYSICAL PARTICIPATION

Shareholders who wish to participate physically, may present themselves on 9 June 2026 at 14:00 (Belgian time) at Boulevard Patience et Beaujonc 3/1, 4000 Liège, Belgium. The Company kindly asks participants to register from 13:30 to no later than 13:50 in order to allow for the attendance list to be drawn up.

Any natural person participating in the Annual Shareholders’ Meeting as a shareholder, proxy holder or representative of a legal person must prove his or her identity. The representatives of legal persons must also prove their capacity as a legal representative or special proxy.

REVISED AGENDA

Article 7:130, §1 BCCA allows shareholders who hold at least three percent (3%) of the Company’s share capital (either alone or together with other shareholders) to add items to the Annual Shareholders’ Meeting’s agenda and to file draft resolutions in relation to items that have been or will be added to the agenda.

The Board of Directors reminds all shareholders who wish to revise agenda items and proposed resolutions that they must comply with the formalities for attending the Annual Shareholders’ Meeting (see section: Formalities for Participation above).

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How to revise agenda items and/or propose new resolutions

In accordance with article 7:130, §1 BCCA, shareholders must submit proof to the Company that they own at least three percent (3%) of the Company's share capital at the date the request is made to revise agenda items or propose new resolutions. In addition, a request to add items to the agenda and/or to propose draft resolutions must be submitted in writing. The request must contain the description of the agenda item concerned. For adding a proposed resolution, the request must contain the description of the draft resolution.

Dispatch

This request must be sent to the Company by no later than 18 May 2026 (date of receipt by the Company) by email to corporate@hyloris.com or by post to Hyloris Pharmaceuticals SA, Boulevard Patience et Beaujonc 3/1, 4000 Liège, Belgium, to the attention of Mrs. Ann De Jaeger, Chief Legal Officer of the Company. Sending by email is recommended.

Confirmation of receipt

The Company will confirm within 48 hours the receipt of any requests to add agenda items or proposed resolutions. The Company will inform the shareholder in writing whether its request fulfils the conditions set out above or not. To do so, shareholders are invited to indicate the postal or e-mail address to which the Company should send confirmation of receipt of the request.

Implications of a revised agenda and/or proposal of new resolutions

In the event of changes to the agenda and/or proposed resolutions, as described above, the Company will publish a revised agenda with additional agenda items and/or additional proposed resolutions no later than 25 May 2026.

Simultaneously with the publication of a revised agenda, the Company will make an amended proxy form and an amended vote by letter form available on the Company's website at https://hyloris.com/shareholders-meeting-2026/. Proxies and votes by letter that have reached the Company prior to the publication of a revised agenda remain valid for the agenda items to which the proxies apply. However, for each new agenda item or each new proposed resolution, the proxy form must indicate whether the proxy holder is authorised to vote on the new items on the agenda or whether she/he/it must abstain. If this is not the case, the proxy holder will abstain from voting on any new items on the agenda or proposed resolutions. Therefore, shareholders have the possibility to submit a new proxy or vote by letter (in accordance with the respective section) by using the amended forms.

RIGHT TO ASK QUESTIONS

Every shareholder and subscription right holder has the right to ask questions to the Board of Directors and the statutory auditor in relation to the items on the agenda of the Annual Shareholders' Meeting. These questions may be asked in writing prior to the Annual Shareholders' Meeting.

The Board of Directors reminds all shareholders and subscription right holders who wish to ask a question that they must comply with the formalities for attending the Annual Shareholders' Meeting (see section Formalities for Participation above).

How to ask your question ahead of the Annual Shareholders' Meeting

Please send your question by no later than 3 June 2026 (date of receipt by the Company) by e-mail to corporate@hyloris.com or by post to Hyloris Pharmaceuticals SA, Boulevard Patience et Beaujonc 3/1, 4000 Liège, Belgium, to the attention of Mrs. Ann De Jaeger, Chief Legal Officer of the Company. Sending by email is recommended.

How to ask your question during the Annual Shareholders' Meeting

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Where applicable, you can ask your question during the Annual Shareholders' Meeting at the times reserved for questions during the Annual Shareholders' Meeting and when indicated by the bureau.

DOCUMENTS

All specific Annual Shareholders' Meeting-related documents are available on the Company's website at https://hyloris.com/shareholders-meeting-2026/ and on the ABN AMRO platform (www.abnamro.com/evoting), both in French and English. Shareholders can request a copy of these documents by sending an email to corporate@hyloris.com.

The Company's website also mentions the total number of outstanding shares and voting rights of the Company.

PRIVACY AND DATA PROTECTION

In the context of the Annual Shareholders' Meeting, the Company will receive personal data (in the sense of article 4(1) of the GDPR) from its shareholders, subscription right holders and their proxy holders. The personal data could be in the form of a name, identification data, number of shares or subscription rights, proxy, questions and correspondence via ordinary post or email, confirmation of attendance, etc. During and after the Annual Shareholders' Meeting, additional data could be collected in the form of an attendance list, voting results, voice recording and film, letters and emails, etc. The Company emphasises that it is committed to processing these data according to applicable law and best practices.

The Company will process your personal data only for the purpose of organising and administering the Annual Shareholders' Meeting. To attain this purpose, the Company reserves the right to share your personal data with affiliated entities and with service providers that are assisting the Company in the organising and administering of the Annual Shareholders' Meeting, such as ABN AMRO. None of the personal data communicated to the Company will be stored any longer than necessary for the abovementioned purpose.

You can find more information on the Company's Privacy Policy on https://hyloris.com/privacy-policy/. For questions or remarks relating to this privacy statement and the processing of your personal data, please write to contact@hyloris.com.

HOW TO CONTACT US

If you have practical questions, please contact us at corporate@hyloris.com.

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Yours sincerely,

The Board of Directors

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