Biotalys — Proxy Solicitation & Information Statement 2026

Apr 29, 2026

biotalys

Unofficial English translation – For convenience purposes only

Biotalys NV

Buchtenstraat 11, 9051 Ghent

RPR 0508.931.185 (Ghent)

(the "Company")

NOTICE OF REGISTRATION FOR THE ANNUAL SHAREHOLDERS MEETING DATED 29 MAY 2026

This is an unofficial English translation, for information purposes only. Please only sign and return the original Dutch version.

This notice of registration should be used by all shareholders who wish to participate in the ordinary annual shareholders meeting in person, by power of attorney or by letter.

The signed and completed notice (Dutch version) much reach the Company at the latest on 23 May 2026 at midnight (24.00 h Belgian Time):

per mail at: Biotalys NV, Buchtenstraat 11, 9051 Ghent (Belgium) attention, Chairman of the Board of Directors

or per e-mail to: corporate@biotalys.com

All holders of dematerialised shares must attach to the notice a certificate issued by a recognised account holder or central custodian institution, confirming the number of shares that have been registered in their name on the registration date, (15 May 2026 at midnight, 24.00h (Belgian Time)) with which the shareholder wants to participate to the shareholders meeting.

The Undersigned,

Family Name
First Name
Address
or (for legal entities),
Name

---

Legal entity type
Address
Legal Entities Registration number/VAT/similar
Represented by (name, first name and capacity)

owner of the following number of securities issued by the Company:

Number of registered shares
Number of dematerialised shares
Number of registered subscription rights¹

hereby notifies his/her/its intent to attend the ordinary annual shareholders meeting of the Company which will take place on 29 May 2026 at 10.00 a.m. (Belgian Time) at the registered office of the Company at Buchtenstraat 11, 9051 Ghent.

Done at...on...2026.

Signature:...

¹ Only applicable to holders of subscription rights issued under the long term incentive plans of the Company for its and its subsidiary’s personnel. The Company has not issued any other subscription rights. Holders of subscription rights are only entitled to an advisory vote.