OncoMethylome Sciences S.A. Announces Warrant Exercise

Liege (Belgium) - May 29, 2009, 18:00 CET - OncoMethylome Sciences (Euronext Brussels: ONCOB, Euronext Amsterdam: ONCOA), today announced that an additional 24,540 common shares have been issued by the company in exchange for EUR 110 thousand as the result of the exercise of warrants by some employees and consultants of the company. The majority of the exercised warrants were granted in May 2004 and were scheduled to expire in May 2009 if not exercised. As a result of this transaction, OncoMethylome now has 13,185,614 shares outstanding.

About OncoMethylome Sciences

OncoMethylome Sciences (Euronext Brussels: ONCOB; Euronext Amsterdam: ONCOA) is a molecular diagnostics company developing gene methylation tests to assist physicians in effectively detecting and treating cancer. Specifically, the company's tests are designed to help the physician (i) accurately detect cancer in early stages of cancer development, (ii) predict a patient's response to drug therapy, and (iii) predict the likelihood of cancer recurrence.

OncoMethylome boasts a broad product development pipeline consisting of over ten products and a solid partnering record. The company collaborates with leading international molecular oncology research centers, such as The Johns Hopkins University, and has a number of commercial and collaborative partnerships with Veridex LLC, a Johson & Johnson company, LabCorp, Schering-Plough Corp., GlaxoSmithKline Biologicals, Abbott, Millipore Corporation's BioScience Division, EXACT Sciences Corp., Merck KGaA and Qiagen. OncoMethylome's products are based on methylation technology invented by Johns Hopkins University (USA).

Established in January 2003, OncoMethylome has offices in Liege and Leuven (Belgium), in Durham, NC (USA), and in Amsterdam (the Netherlands).