Lonza to Appoint Jeanne Thoma as Future COO of the Microbial Control Sector

August 19,2011 Basel, Switzerland

Lonza Group Ltd (SIX: LONN), one of the world’s leading suppliers to the life science industries, announced today the appointment of Jeanne Thoma as Chief Operating Officer for Lonza’s Microbial Control sector (LMC) which will be created following the acquisition of Arch Chemicals. She will assume the role upon the successful closing of the acquisition and at this time will also become a member of the Lonza Management Committee reporting to Stefan Borgas, CEO.

On 11 July 2011 Lonza announced its intention to acquire Arch Chemicals to build the world’s leading Microbial Control business. The acquisition is currently under review by the regulatory authorities and is subject to their approval. The deal is expected to close later in 2011. Today's appointment has been made under the assumption that the acquisition will close successfully.

Jeanne was selected following a thorough and intensive internal and external assessment of all candidates. This appointment is an important step in building the leadership team of Lonza’s global microbial control business. Jeanne will shape the organizational structure of the Microbial Control sector that will be created, propose and appoint its first tier leadership team and drive the preparations for the integration of both organizations from a business perspective. Jeanne will be based in Basel (CH).

Jeanne brings more than 20 years of global business experience to her new position.
She joined Lonza in 2004 and since 2007 has served as the Global Head of the Business Unit, Microbial Control and President of Lonza Inc, a US legal entity. Prior to joining Lonza, Jeanne spent 15 years at BASF Corp holding various leadership positions in Sales, Marketing, Logistics and Supply Chain.

A native of New Jersey, USA, Jeanne holds dual US and Irish Citizenship. She earned a Bachelors of Science degree and a Masters in Business Administration.


About Lonza

Lonza is one of the world's leading suppliers to the pharmaceutical, healthcare and life science industries. Products and services span its customers’ needs from research to final product manufacture. It is the global leader in the production and support of active pharmaceutical ingredients both chemically as well as biotechnologically. Biopharmaceuticals are one of the key growth drivers of the pharmaceutical and biotechnology industries. Lonza has strong capabilities in large and small molecules, peptides, amino acids and niche bioproducts which play an important role in the development of novel medicines and healthcare products. In addition, Lonza is a leader in cell-based research, endotoxin detection and cell therapy manufacturing. Furthermore, the company is a leading provider of value chemical and biotech ingredients to the nutrition, hygiene, preservation, agro and personal care markets.

Lonza is headquartered in Basel, Switzerland and is listed on the SIX Swiss Exchange. In 2010, the company had sales of CHF 2.680 billion. Further information can be found at www.lonza.com.


For further information:

Lonza Group Ltd
Head of Corporate Communications
Dominik Werner
Tel +41 61 316 8798
Fax +41 61 316 9798

Lonza Group Ltd
Investor Relations
Dirk Oehlers
Tel +41 61 316 8540
Fax +41 61 316 9540

Lonza Group Ltd
Media Relations
Melanie Disa
Tel +1 201 316 9413
Fax +1 201 696 3533


Forward-looking statements

Forward-looking statements contained herein are qualified in their entirety as there are certain factors that could cause results to differ materially from those anticipated. Any statements contained herein that are not statements of historical fact (including statements containing the words “believes,” “plans,” “anticipates,” “expects,” “estimates” and similar expressions) should be considered to be forward-looking statements. Statements herein regarding the proposed transaction between Lonza and Arch Chemicals, the expected timetable for completing the transaction, the potential benefits of the transaction, and any other statements about management’s future expectations, beliefs, goals, plans or prospects also constitute forward-looking statements. Investors are cautioned that all forward-looking statements involve risks and uncertainty. There are a number of important factors that could cause actual results or events to differ materially from those indicated by such forward-looking statements, including: uncertainties as to the timing of the tender offer and merger; uncertainties as to how many shareholders will tender their stock in the offer; the possibility that various closing conditions for the transaction may not be satisfied or waived; the effects of disruption from the transaction making it more difficult to maintain relationships with employees, customers, and other business partners; and changes in the political, social and regulatory framework in which the company operates, or in economic or technological trends or conditions, including currency fluctuations, inflation and consumer confidence, on a global, regional or national basis. Except as otherwise required by law, Lonza disclaims any intention or obligation to update any forward-looking statements as a result of developments occurring after this communication was made.


Additional information

This communication is for informational purposes only and is not a recommendation, an offer to purchase or a solicitation of an offer to sell shares of Arch Chemicals. LG Acquisition Corp., Lonza’s indirect wholly owned subsidiary, has filed a tender offer statement on Schedule TO with the U.S. Securities and Exchange Commission, and Arch Chemicals has filed a solicitation/recommendation statement on Schedule 14D-9 with respect to the tender offer. Investors and Arch Chemicals shareholders are strongly advised to carefully read the tender offer statement (including the offer to purchase, the letter of transmittal and the related tender offer documents) and the related solicitation/recommendation statement, as well as any amendments thereto and other relevant documents filed with the SEC when they become available, because they will contain important information. Investors and Arch Chemicals shareholders may obtain a free copy of the tender offer statement, the solicitation/recommendation statement and other documents (when available) filed with the SEC at the SEC’s website at www.sec.gov. The tender offer statement and other documents that LG Acquisition Corp. files with the SEC may also be obtained free of charge by directing a request by mail to MacKenzie Partners, Inc. at 105 Madison Avenue, New York, New York 10016, by calling toll-free at +1 800 322 2885 or by email to tenderoffer@mackenziepartners.com.

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