X0303 4 2011-05-31 0000790705 TEKELEC TKLC 0001334106 De Lange Ronald J C/O TEKELEC 5200 PARAMOUNT PARKWAY MORRISVILLE NC 27560 1 1 0 0 President & CEO Common Stock 25028 D Restricted Stock Units 2011-05-31 4 A 0 75000 0 A Common Stock 75000 75000 D Restricted Stock Units ("RSUs") convert to Tekelec Common Stock on a one-for-one basis. Each RSU represents the right to receive, upon vesting, one share of Tekelec Common Stock. The RSUs will vest (and shares represented thereby will be issued) on May 31, 2015, as long as the Reporting Person remains an employee of the Company (or any of its affiliates) from the grant date through the vesting date. Ronald J. de Lange 2011-06-02