X0303 4 2011-03-02 0000790705 TEKELEC TKLC 0001334106 De Lange Ronald J C/O TEKELEC 5200 PARAMOUNT PARKWAY MORRISVILLE NC 27560 0 1 0 0 EVP Global Product Solutions Common Stock 2011-03-02 4 S 0 16494 7.7259 D 25028 D This transaction effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on December 14, 2010. This transaction was executed in multiple trades at prices ranging from $7.68 to $7.795. The price reported reflects the weighted average sale price. The Reporting Person has provided to the Issuer and will provide to any shareholder of the Issuer, or to the SEC Staff, upon request, information regarding the number of shares sold at each price within the range. Ronald J. De Lange 2011-03-02