Onxeo S.A.: Publication of a Letter to Shareholders – May 2015

PARIS & COPENHAGEN, Denmark--(BUSINESS WIRE (http://www.businesswire.com/))--
Regulatory News:

Onxeo S.A. (Paris:ONXEO) (NASDAQ OMX:ONXEO), an innovative company specializing
in the development of orphan oncology drugs, today announces the publication of
the Letter to Shareholders - May 2015.

The Shareholders Letter is available on the website
at: www.onxeo.com (http://cts.businesswire.com/ct/CT?id=smartlink&url=http%3A%2F
% 
2Fwww.onxeo.com&esheet=51101050&newsitemid=0&lan=en
-US&anchor=www.onxeo.com&index=1&md5=71be9f436a4b149b3531a57eb9cdbc1a) (Media or
Investors/Shareholders).

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
preliminary top-line results
Beleodaq® (belinostat): registered in the US in peripheral T-cell lymphoma
For more information, visit the
website www.onxeo.com (http://cts.businesswire.com/ct/CT?id=smartlink&url=http%3
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%2F%2Fwww.onxeo.com&esheet=51101050&newsitemid=0&lan=en
-US&anchor=www.onxeo.com&index=2&md5=a386e034ee2d8575a85ce0b2157c7719)

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 (http://cts.businesswire.com/ct/CT?id=smartlink&url=http%3A%2F%2Fwww
. 
amf-france.org&esheet=51101050&newsitemid=0&lan=en
-US&anchor=http%3A%2F%2Fwww.amf
-france.org&index=3&md5=14aef11b4187c5f5f6c03859fec80950)) or on the company’s
website
(www.onxeo.com (http://cts.businesswire.com/ct/CT?id=smartlink&url=http%3A%2F%2F
w 
ww.onxeo.com&esheet=51101050&newsitemid=0&lan=en
-US&anchor=www.onxeo.com&index=4&md5=02f493cc57aefb431d2b6305b824f3fb)).
Contacts:

Onxeo
Judith Greciet, CEO
j.greciet@onxeo.com
Nicolas Fellmann, CFO
n.fellmann@onxeo.com
+33 1 45 58 76 00
or
Caroline Carmagnol
onxeo@alizerp.com
+33 6 64 18 99 59 / +33 1 44 54 36 61