Rigrodsky & Long, P.A., a national securities firm with offices in Delaware and New York, announces that it is investigating potential claims against the board of directors of Catalyst Health Solutions, Inc. (“Catalyst” or the “Company”) (NASDAQ GS: CHSI) over the Company’s entry into an agreement to be acquired by SXC Health Solutions (“SXC Health”) (NASDAQ GS: SXCI) in a cash and stock transaction valued at about $4.4 billion. Under the terms of the merger agreement, Catalyst shareholders will receive $28.00 in cash and 0.6606 shares of SXC Health stock for each Catalyst share, implying a purchase price of $81.02 per Catalyst share. Following the close of the transaction, the SXC Health board of directors will include two current Catalyst directors. The transaction, which is subject to approval by SXC Health and Catalyst shareholders, U.S. antitrust approval and other customary closing conditions, is expected to close in the second half of 2012. The investigation concerns whether Catalyst’s board of directors failed to adequately shop the Company and obtain the best price possible for Catalyst’s shareholders before entering into an agreement with SXC Health. If you own the common stock of Catalyst and purchased your shares before April 18, 2012, if you have information or would like to learn more about these claims, or if you wish to discuss these matters or have any questions concerning this announcement or your rights or interests with respect to these matters, please contact Scott J. Farrell, Esquire or Peter Allocco of Rigrodsky & Long, P.A., 825 East Gate Boulevard, Suite 300, Garden City, New York 11530 toll free at (888) 969-4242, by e-mail to email@example.com, or at: http://www.rigrodskylong.com/investigations/catalyst-health-solutions-inc-chsi. Rigrodsky & Long, P.A., with offices in Wilmington, Delaware and Garden City, New York, regularly litigates securities class, derivative and direct actions, shareholder rights litigation and corporate governance litigation, including claims for breach of fiduciary duty and proxy violations in the Delaware Court of Chancery and in state and federal courts throughout the United States. Attorney advertising. Prior results do not guarantee a similar outcome.