UCB Convertible Bond and update on share capital, securities carrying voting rights and voting rights

Brussels (Belgium), February 27, 2014 – 18:30 (CET) – regulated information

Pursuant to Article 15, §1 of the law of May 2, 2007 on the disclosure of large shareholdings, UCB SA/NV announces that, following the partial conversion of the Convertible Bonds (as defined below), the new data concerning its share capital, securities carrying voting rights and voting rights are as follows (information as on February 27, 2014):

• Share capital: 565,623,627 EUR
• Total number of securities carrying voting rights: 188,541,209 (all ordinary shares)
• Total number of voting rights (= denominator): 188,541,209 (all related to ordinary shares)
• Total number of remaining convertible bonds: 6,037 Convertible Bonds (see below)
• Total number of voting rights that may result from the conversion of such remaining Convertible Bonds: 5,983,843 (see below)

The following transaction leads to this announcement:

• A capital increase on February 27, 2014 and the resulting issuance of 5,114,057 ordinary shares following the conversion of 3,963 Convertible Bonds

Additional information:

On September 30, 2009, UCB SA/NV issued 10,000 senior unsecured 4.5% bonds due 2015 for an aggregate principal amount of € 500 million, placed with institutional investors following an accelerated book-building procedure on September 30, 2009 (the “Convertible Bonds”). On November 6, 2009, an extraordinary general meeting decided to attach a conversion right to these bonds.

UCB SA/NV has exercised its option to redeem all outstanding Convertible Bonds on March 12, 2014 (see the press releases of January 21, 2014 and January 16, 2014 for further details).

As an alternative to the redemption of the Convertible Bonds, each bondholder may exercise its conversion rights, following which UCB SA/NV may, in its own discretion, decide to transfer existing UCB shares and/or issue new UCB shares.

Pursuant to the notices received by UCB NV/SA on or prior to February 14, 2014, a number of bondholders have exercised their conversion rights with respect to 3,963 Convertible Bonds, resulting in the abovementioned capital increase and issuance of 5,114,057 new UCB shares.

The last day on which bondholders may exercise their conversion rights is March 5, 2014.

An updated overview of the UCB SA/NV large shareholdings is included in the corporate governance charter of UCB SA/NV, which is published on UCB SA/NV’s website.

For further information

• Antje Witte, Investor Relations UCB

T +32.2.559.9414, antje.witte@ucb.com

• Alexandra Deschner, Investor Relations, UCB

T +32 2 559 9683, alexandra.deschner@ucb.com

About UCB

UCB, Brussels, Belgium (www.ucb.com) is a global biopharmaceutical company focused on the discovery and development of innovative medicines and solutions to transform the lives of people living with severe diseases of the immune system or of the central nervous system. With 8700 people in approximately 40 countries, the company generated revenue of € 3.4 billion in 2013. UCB is listed on Euronext Brussels (symbol: UCB). Follow us on Twitter: @UCB_news

Forward looking statements

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Moreover, sales may be impacted by international and domestic trends toward managed care and health care cost containment and the reimbursement policies imposed by third-party payers as well as legislation affecting biopharmaceutical pricing and reimbursement.