X0202 4 2006-03-01 0 0000750813 SEITEL INC SELA 0001129787 VA PARTNERS LLC 435 PACIFIC AVENUE FOURTH FLOOR SAN FRANCISCO CA 94133 1 0 1 0 0001351069 ValueAct Capital Management, L.P. 435 PACIFIC AVENUE, 4TH FLOOR SAN FRANCISCO CA 94133 1 0 1 0 0001351073 ValueAct Capital Management, LLC 435 PACIFIC AVENUE, 4TH FLOOR SAN FRANCISCO CA 94133 1 0 1 0 0001159187 UBBEN JEFFREY W 435 PACIFIC AVENUE, FOURTH FLOOR SAN FRANCISCO CA 94133 0 0 1 0 0000937541 KAMIN PETER H TWO INTERNATIONAL PLACE, 25TH FLOOR BOSTON MA 02110 1 0 1 0 Common Stock, par value $.01 per share 2006-03-01 4 P 0 21499983 2.75 A 51201346 I See Footnote Common Stock Purchase Warrants 0.72 2006-03-01 4 P 0 15037568 2 A 2011-08-12 Common Stock, par value $.01 per share 15037568 15037568 I See Footnote As General Partner of ValueAct Capital Master Fund, L.P. and ValueAct Capital Partners Co-Investors, L.P. The reported stock is owned directly by ValueAct Capital Master Fund, L.P and ValueAct Capital Partners Co-Investors, L.P. and may be deemed to be beneficially owned by (i) VA Partners, L.L.C. as General Partner (ii) ValueAct Capital Management, L.P. as the manager of ValueAct Capital Master Fund, L.P. and ValueAct Capital Partners Co-Investors, L.P. and (iii) ValueAct Capital Management, LLC as General Partner of ValueAct Capital Management, L.P. Jeffrey W. Ubben and George F. Hamel, Jr. are Managing Members of VA Partners, L.L.C. and ValueAct Capital Management, LLC. Peter H. Kamin is a director of Seitel, Inc and Managing Member of VA Partners, L.L.C. and ValueAct Capital Management, LLC. Gregory P. Spivy is a director of Seitel, Inc. and Non-Managing Member of VA Partners, L.L.C. and ValueAct Capital Management, LLC. The reporting persons disclaim beneficial ownership of the reported stock except to the extent of their pecuniary interest therein. One common stock purchase warrant represents the right to purchase one share of the Issuer's common stock, at an exercise price of $.72 per share, exercisable at any time during the period ending on 08/12/2011. Remarks: Joint Filer Information: Name: ValueAct Capital Master Fund, L.P. Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: March 1, 2006 Name: ValueAct Capital Partners Co-Investors, L.P. Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: March 1, 2006 Name: ValueAct Capital Management, L.P. Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: March 1, 2006 Name: ValueAct Capital Management, LLC Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: March 1, 2006 Name: Jeffrey W. Ubben, Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: March 1, 2006 Name: George F. Hamel, Jr. Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: March 1, 2006 Name: Peter H. Kamin Address: 435 Pacific Avenue, Fourth Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: March 1, 2006 VA PARTNERS, L.L.C., By:/s/ George F. Hamel. Jr., Managing Member 2006-03-02 VALUEACT CAPITAL MASTER FUND, L.P., By: VA PARTNERS, L.L.C., its General Partner, By:/s/ George F. Hamel. Jr., Managing Member 2006-03-02 VALUEACT CAPITAL PARTNERS CO-INVESTORS, L.P., By: VA PARTNERS, L.L.C., its General Partner, By:/s/ George F. Hamel. Jr., Managing Member 2006-03-02 VALUEACT CAPITAL MANAGEMENT, L.P., By: VALUEACT CAPITAL MANAGEMENT, LLC, its General Partner, By:/s/ George F. Hamel. Jr., Managing Member 2006-03-02 VALUEACT CAPITAL MANAGEMENT, LLC, By:/s/ George F. Hamel. Jr., Managing Member 2006-03-02 /s/ Jeffrey W. Ubben 2006-03-02 /s/ George F. Hamel, Jr. 2006-03-02 /s/ Peter H. Kamin 2006-03-02