Ackman's Pershing Square Capital Nominates Eight to Ceridian (CEN) Board

In an amended 13D filing on Ceridian Corporation (NYSE: CEN), 11.3% holder Bill Ackman's Pershing Square Capital hedge fund notified the company that they propose to nominate the following persons for election to the Board of Directors at the 2007 annual meeting of stockholders: William A. Ackman, Michael L. Ashner, John D. Barfitt, Harald Einsmann, Robert J. Levenson, Michael E. Porter, Gregory A. Pratt and Alan Schwartz.