X0202 4 2006-07-21 0 0000790705 TEKELEC TKLC 0001137521 GLENHILL ADVISORS LLC 598 MADISON AVENUE, 12TH FLOOR NEW YORK NY 10022 0 0 1 0 0001137373 GLENHILL CAPITAL LP X1 0 0 1 0 0001319290 Glenhill Concentrated Long Master Fund, LLC X1 0 0 1 0 0001137522 GLENHILL CAPITAL MANAGEMENT LLC X1 0 0 1 0 0001300986 Glenhill Capital Overseas Master Fund, L.P. X1 0 0 1 0 0001300984 Glenhill Capital Overseas GP, Ltd. X1 0 0 1 0 0001164754 GLENHILL OVERSEAS MANAGEMENT LLC X1 0 0 1 0 0001159120 KREVLIN GLENN J X1 0 0 1 0 Common Stock, no par value 2006-07-21 4 P 0 175050 9.9355 A 7305050 I By Glenhill Capital LP Common Stock, no par value 2006-07-21 4 P 0 74950 9.9355 A 7380000 I By Glenhill Overseas Master Fund, L.P. Common Stock, no par value 2006-07-21 4 P 0 16315 9.9364 A 7396315 I By Glenhill Capital LP Common Stock, no par value 2006-07-21 4 P 0 6985 9.9364 A 7403300 I By Glenhill Overseas Master Fund, L.P. Common Stock, no par value 2006-07-21 4 P 0 697889 9.9619 A 8101189 I By Glenhill Capital LP Common Stock, no par value 2006-07-21 4 P 0 298811 9.9619 A 8400000 I By Glenhill Overseas Master Fund, L.P. Common Stock, no par value 2006-07-24 4 P 0 70020 10.2864 A 8470020 I By Glenhill Capital LP Common Stock, no par value 2006-07-24 4 P 0 29980 10.2864 A 8500000 I By Glenhill Overseas Master Fund, L.P. Common Stock, no par value 2006-07-25 4 P 0 300000 10.0625 A 8800000 I By Glenhill Concentrated Long Master Fund, L.L.C. Common Stock, no par value 2006-07-26 4 P 0 1291 10.050 A 8801291 I By Glenhill Concentrated Long Master Fund, L.L.C. Common Stock, no par value 2006-07-26 4 P 0 98709 10.385 A 8900000 I By Glenhill Concentrated Long Master Fund, L.L.C. Glenhill Capital Management, LLC, as the general partner of Glenhill Capital LP, may be deemed to beneficially own the shares owned by Glenhill Capital LP. Glenhill Advisors, LLC, as the managing member of Glenhill Capital Management, LLC, may be deemed to beneficially own the shares owned by Glenhill Capital LP. Glenn Krevlin is the managing member of Glenhill Advisors, LLC. Glenhill Capital Overseas GP, Ltd., as general partner of Glenhill Capital Overseas Master Fund, L.P., may be deemed to beneficially own the shares owned by Glenhill Capital Overseas Master Fund L.P. Glenhill Overseas Management, LLC, as investment advisor of Glenhill Capital Overseas Master Fund, L.P., may be deemed to beneficially own the shares owned by Glenhill Capital Overseas Master Fund, L.P. Glenhill Advisors, LLC , as the managing member of Glenhill Overseas Management LLC, may be deeded to beneficially own the shares owned by Glenhill Capital Overseas Master Fund, L.P. Glenn Krevlin is the managing member of Glenhill Advisors, LLC and the sole director of Glenhill Capital Overseas GP, Ltd. Glenhill Capital Management LLC, as the managing member of Glenhill Concentrated Long Master Fund, LLC, may be deemed to beneficially own the shares owned by Glenhill Concentrated Long Master Fund, LLC.. Glenhill Advisors, LLC , as the managing member of Glenhill Capital Management, LLC, may be deemed to beneficially own the shares owned by Glenhill Concentrated Long Master Fund, LLC. Glenn Krevlin is the managing member of Glenhill Advisors, LLC. Each Reporting Person disclaims beneficial ownership of these securities except to the extent of its pecuniary interest, and this report shall not be deemed to be an admission that any Reporting Person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose. /s/ Glenn J. Krevlin, Managing Member of Glenhill Advisors, LLC 2006-07-31