<PAGE>
 

                                   SIGNATURES

      Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                              ZAPATA CORPORATION



May 15, 1995                  By:   /s/  JOSEPH L. VON ROSENBERG III
                                  ------------------------------------
                                  Joseph L. von Rosenberg III
                                  Vice President, General Counsel
                                  and Corporate Secretary



May 15, 1995                        /s/  LAMAR C. MCINTYRE
                                  ---------------------------------------
                                  Lamar C. McIntyre
                                  Vice President, Chief Financial Officer,
                                  Treasurer and Assistant Secretary

                                      16