ONCOSEM ONKOLOJİK SİSTEMLER SANAYİ VE TİCARET A.Ş. İlişkili Taraf İşlemleri 19 Ekim 2026

The Board of Directors of our Company has resolved as follows:

To enter into a trademark license agreement granting our Company the right to use the "OncoCare" trademark, registered with the Turkish Patent and Trademark Office under registration number 2012/35590 in the name of our Company's wholly owned subsidiary, SANTEK SAĞLIK TURİZM TEKSTİL SANAYİ VE TİCARET A.Ş. ("SANTEK"), for the five-year period covering 2026–2031;

To determine the total trademark license fee for the aforementioned five-year license period as TRY 250,000.00 + VAT, to be invoiced by SANTEK to our Company in a single invoice and paid by our Company in a single payment, in accordance with the terms of the agreement;

As the transaction constitutes a related-party transaction between our Company and its wholly owned subsidiary, SANTEK, to fulfill the relevant assessment, documentation and public disclosure obligations under the applicable capital markets and tax legislation;

To authorize Mr. Erol ÇELİK to sign the trademark license agreement on behalf of our Company, provided that such authorization complies with the representation and binding authority arrangements registered in our Company's trade registry;

To carry out all necessary applications, notifications, accounting procedures and other administrative actions within the scope of this resolution.

The foregoing resolutions were adopted unanimously by the members of the Board of Directors attending the meeting.

Submitted for public information.

The English translation of this disclosure is attached hereto. In case of any discrepancy between the Turkish and English versions of the disclosure, the Turkish version shall prevail.