Dionex Corporation (NasdaqGS: DNEX) shareholder litigation in connection with alleged unfair

takeover offer

On December 13, 2010, Dionex Corporation (“Dionex” or the “Company”) announced that it has

agreed to sell the Company to Thermo Fisher Scientific (“Thermo Fisher”) (NYSE: TMO). Under the

terms of the transaction, Thermo Fisher will acquire all of the outstanding shares of Dionex for

$118.50 per share in cash, for a total purchase price of approximately $2.1 billion. The transaction is

not conditioned on financing and is expected to be completed in the first quarter of 2011.

The investigation concerns whether the Dionex Board of Directors breached their fiduciary duties to

Dionex stockholders by failing to adequately shop the Company before entering into this transaction

and whether Thermo Fisher is underpaying for Dionex shares, thus unlawfully harming Dionex

stockholders.