X0202 4 2004-12-03 0 0000750813 SEITEL INC SELA 0001129787 VA PARTNERS LLC 435 PACIFIC AVENUE FOURTH FLOOR SAN FRANCISCO CA 94133 0 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 0 0 1 0 Common Stock par value $.01 per share 2004-12-03 4 P 0 550000 1.05 A 19912163 I See Footnotes Common Stock par value $.01 per share 2004-12-06 4 P 0 130000 1.05 A 20042163 I See Footnotes Common Stock par value $.01 per share 2004-12-07 4 P 0 71200 1.05 A 20113363 I See Footnotes As General Partner of ValueAct Capital Master Fund, L.P., ValueAct Capital Partners II, L.P., and ValueAct Capital Partners Co-Investors, L.P. These securities are also beneficially owned by Jeffrey W. Ubben, George F. Hamel, Jr., and Peter H. Kamin as Managing Members, Principal Owners and Controlling Persons of VA Partners, LLC. The reporting persons disclaim beneficial ownership except to the extent of their pecuniary interest therein. Joint Filer Information Name: ValueAct Capital Master Fund, L.P. Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: December 3, 2004 Name: ValueAct Capital Partners II, L.P. Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: December 3, 2004 Name: ValueAct Capital Partners Co-Investors, L.P. Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: December 3, 2004 Name: Jeffrey W. Ubben Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: December 3, 2004 Name: George F. Hamel, Jr. Address: 435 Pacific Avenue, 4th Floor, San Francisco, CA 94133 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: December 3, 2004 Name: Peter H. Kamin Address: Two International Place, 25th Floor, Boston, MA 02110 Designated Filer: VA Partners, L.L.C. Issuer and Ticker Symbol: Seitel, Inc. (SELA) Date of Event Requiring Statement: December 3, 2004 VALUEACT CAPITAL MASTER FUND, L.P., BY VA PARTNERS, L.L.C., ITS GENERAL PARTNER, BY: /s/ George F. Hamel, Jr., Managing Member 2004-12-07 VALUEACT CAPITAL PARTNERS II, L.P., BY VA PARTNERS, L.L.C., ITS GENERAL PARTNER, By: /s/ George F. Hamel, Jr., Managing Member 2004-12-07 VALUEACT CAPITAL PARTNERS CO-INVESTORS, L.P., BY VA PARTNERS, L.L.C., ITS GENERAL PARTNER, By: /s/ George F. Hamel, Jr., Managing Member 2004-12-07 VA PARTNERS, L.L.C., By: /s/ George F. Hamel, Jr., Managing Member 2004-12-07 By: /s/ Jeffrey W. Ubben 2004-12-07 By: /s/ George F. Hamel, Jr. 2004-12-07 By: /s/ Peter H. Kamin 2004-12-07