Notice of Class Action Lawsuit Filed Against Catamaran Corporation By a Shareholder Represented by Abraham, Fruchter & Twersky, LLP

NEW YORK--(BUSINESS WIRE)--

Notice is hereby given that a securities class action lawsuit (Case No. 1:15-cv-04513) has been filed in the United States District Court for the Northern District of Illinois (the "Court") on behalf of a putative class (the "Class") of Catamaran Corporation ("Catamaran" or the "Company") CTRX stockholders that will be asked to vote upon the Company's proposed sale (the "Proposed Transaction") to UnitedHealth Group Incorporated ("UnitedHealth") for $61.50 per share.

The case alleges that Catamaran and its directors are violating Section 14(a) of the Securities Exchange Act of 1934 by seeking approval of the Proposed Transaction by means of materially false and misleading disclosures as currently contained in a preliminary proxy statement.

You are not required to take any action in response to this Notice. However, if you wish to serve as lead plaintiff of the Class, you must move the Court no later than 60 days from the date of this Notice.

If you wish to discuss this action or have any questions concerning this Notice or your rights or interests, please contact plaintiff's counsel Jeffrey S. Abraham or Philip T. Taylor at (212) 279-5050 or (800) 440-8986, or via e-mail at info@aftlaw.com or ptaylor@aftlaw.com.

Abraham, Fruchter & Twersky, LLP has extensive experience in securities class action cases, and the firm has been ranked among the leading class action law firms in terms of recoveries achieved by a survey of class action law firms conducted by Institutional Shareholder Services. Please visit us at http://www.aftlaw.com for more information.

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