<PAGE>
 
                                  Exhibit "A"

                          ALLOCATION OF ZAPATA SHARES

                        Energy Industries Shareholders

<TABLE> 
<CAPTION> 
                                                               NUMBER OF SHARES
                                                               ----------------
<S>                                                            <C> 
Peter Holt                                                        4,809,844

Peter Holt H-R Trust                                                140,164

S Stock GST Trust for
Peter M. Holt                                                     1,102,389

Benjamin D. Holt, Jr.                                             3,200,486

Holt Corporate Stock Life
Trust--1985                                                       1,004,429

Holt Corporate Stock Marital
Trust--1985                                                       1,037,910

S Stock GST Trust for
Benjamin D. Holt III                                              1,102,389

S Stock GST Trust for
Anne Holt                                                         1,102,389
                                                                 ----------
                                                                 13,500,000
</TABLE>

 

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