Onxeo

Report Publication Announcement • Oct 28, 2015

Onxeo to attend upcoming investor events

Paris (France), Copenhagen (Denmark), October 28, 2015 – Onxeo S.A. (Euronext Paris, NASDAQ Copenhagen: ONXEO), an innovative company specializing in the development of orphan oncology drugs, today announces its participation to financial conferences in the coming months.

During these conferences, Onxeo's management will present the recent achievements and the growth strategy of the Company to institutional and individual investors.

Meetings with institutional investors:

• Société Générale Biotech & Medtech CEO conference: Paris, November 5, 2015
• Natixis Small and Midcap Conference: Paris, November 24, 2015
• ODDO Forum: Lyon, January 7-8, 2016
• JP Morgan Healthcare Conference: San Francisco, January 11-15, 2016

Meeting with individual investors:

Actionaria: Paris, November 20-21, 2015

About Onxeo

Onxeo has the vision to become a global leader and pioneer in oncology, with a focus on orphan or rare cancers, through developing innovative therapeutic alternatives designed to "make the difference". The Onxeo team is determined to develop innovative medicines that provide patients with hope and significantly improve their lives.

Key orphan oncology products at the advanced development stage are:

Livatag® (Doxorubicin Transdrug™): Phase III in hepatocellular carcinoma Validive® (Clonidine Lauriad® ): Phase II in severe oral mucositis: Positive final results Beleodaq® (belinostat): registered in the US in 2nd line treatment of peripheral T-cell lymphoma For more information, visit the website www.onxeo.com

Disclaimer

This communication expressly or implicitly contains certain forward-looking statements concerning Onxeo and its business. Such statements involve certain known and unknown risks, uncertainties and other factors, which could cause the actual results, financial condition, performance or achievements of Onxeo to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Onxeo is providing this communication as of this date and does not undertake to update any forward-looking statements contained herein as a result of new information, future events or otherwise. For a discussion of risks and uncertainties which could cause actual results, financial condition, performance or achievements of Onxeo to differ from those contained in the forward-looking statements, please refer to the Risk Factors ("Facteurs de Risque") section of the 2014 Reference Document filed with the AMF on April 14, 2015, which is available on the AMF website (http://www.amf-france.org) or on the company's website (www.onxeo.com).

Contacts :

Judith Greciet, CEO j.greciet@onxeo.com Nicolas Fellmann, CFO n.fellmann@onxeo.com +33 1 45 58 76 00

Caroline Carmagnol and Florence Portejoie onxeo@alizerp.com +33 6 64 18 99 59 / +33 6 47 38 90 04