LANDMARK GRAPHICS CORP
POS AM, 1996-10-04
COMPUTER INTEGRATED SYSTEMS DESIGN
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As filed with the Securities and Exchange Commission on October 4, 1996
                                                       Registration No. 33-29916
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                               ---------------

                         POST-EFFECTIVE AMENDMENT NO. 3
                                       TO
                                    FORM S-1

            REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

                         LANDMARK GRAPHICS CORPORATION
             (Exact name of registrant as specified in its charter)

            
            DELAWARE                                76-0029459
     (State of Organization)           (I.R.S. Employer Identification No.)


                                    3811
                        (Primary Standard Industrial
                         Classification Code Number)

                  15150 MEMORIAL DRIVE, HOUSTON, TEXAS  77079
                                 (713) 560-1000
   (Address and telephone number of principal executive offices)  (zip code)


                             PATTI L. MASSARO, ESQ.
                                GENERAL COUNSEL
                              15150 MEMORIAL DRIVE
                             HOUSTON, TEXAS  77079
                    (Name and address of agent for service)

                                 (713) 560-1000
         (Telephone number, including area code, of agent for service)

                                   Copies to:

                         ROBERT E. CRAWFORD, JR., ESQ.
                        WINSTEAD SECHREST & MINICK P.C.
                                1201 ELM STREET
                             5400 RENAISSANCE TOWER
                              DALLAS, TEXAS 75270  

                               ---------------
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                                EXPLANATORY NOTE

         This Post-Effective Amendment No. 3 to the Registration Statement on
Form S-1 is being filed in order to deregister all securities remaining unsold
under that certain Registration Statement on Form S-1 (Registration No.
33-29916) which was filed on July 12, 1989.
<PAGE>   3
                                   SIGNATURES

         Pursuant to the requirements of the Securities Act of 1933, the
Registrant has duly caused this Post-Effective Amendment No. 3 to Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Houston, State of Texas, on October 4, 1996.



                                   LANDMARK GRAPHICS CORPORATION
                                   
                                   
                                   
                                   By:   /s/ Robert P. Peebler                 
                                         --------------------------------------
                                         Robert P. Peebler
                                         President and Chief Executive Officer
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         Pursuant to the requirements of the Securities Act of 1933, this
Post-Effective Amendment No. 3 to Registration Statement has been signed by the
following persons in the capacities and on the dates indicated.

 Signature and Title                                           Date
 -------------------                                           ----
                                                      
 /s/ Robert P. Peebler                                    October 4, 1996
 -------------------------------------------                             
 Robert P. Peebler                                    
 Director, President, and Chief                       
 Executive Officer (Principal                         
 Executive Officer)                                   
                                                      
 /s/ William H. Seippel*                                  October 4, 1996
 -------------------------------------------                             
 William H. Seippel                                   
 Vice President, Finance and                          
 Chief Financial Officer                              
 (Principal Financial and Accounting                  
 Officer)                                             
                                                      
                                                      
 /s/ Sam K. Smith*                                        October 4, 1996
 -------------------------------------------                             
 Sam K. Smith                                         
 Chairman of the Board                                
                                                      
                                                      
 /s/ Lucio Lanza*                                         October 4, 1996
 -------------------------------------------                             
 Lucio Lanza                                          
 Director                                             
                                                      
 /s/ James A. Downing, II*                                October 4, 1996
 -------------------------------------------                             
 James A. Downing, II                                 
 Director                                             
                                                      
                                                      
 /s/ Charles L. Blackburn*                                October 4, 1996
 -------------------------------------------                             
 Charles L. Blackburn                                 
 Director                                             
                                                      
 /s/ Theodore Levitt*                                     October 4, 1996
 -------------------------------------------                             
 Theodore Levitt                                      
 Director

*By:  Robert P. Peebler, attorney-in-fact.


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