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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                             -----------------------

                                    FORM 6-K

       REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 or 15d-16
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                             -----------------------

                          Date of Report: May 30, 2006

                               CEMEX, S.A. de C.V.
                               -------------------
             (Exact name of Registrant as specified in its charter)

                                   CEMEX Corp.
                                   -----------
                 (Translation of Registrant's name into English)

                              United Mexican States
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                 (Jurisdiction of incorporation or organization)

          Av. Ricardo Margain Zozaya #325, Colonia Valle del Campestre
                     Garza Garcia, Nuevo Leon, Mexico 66265
          ------------------------------------------------------------
                    (Address of principal executive offices)


Indicate by check mark whether the registrant files or will file annual reports
under cover Form 20-F or Form 40-F.

Form 20-F   X        Form 40-F
          ------               ------

Indicate by check mark whether the registrant by furnishing the information
contained in this Form is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes                  No   X
    ------              ------

If "Yes" is marked, indicate below the file number assigned to the registrant in
connection with Rule 12g3-2(b):

N/A
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================================================================================ Contents 1. Official communication, dated May 30, 2006, issued by CEMEX, S.A. de C.V., announcing that on May 25, 2006, its board of directors determined the CPO reference value for, and the final amount of, its previously announced stock dividend of US$0.1330 per CPO pursuant to the conditions approved by its shareholders at its General Shareholders' meeting held on April 27, 2006 (attached hereto as exhibit 1).

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, CEMEX, S.A. de C.V. has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. CEMEX, S.A. de C.V. ------------------------------------------ (Registrant) Date: May 30, 2006 By: /s/ Rafael Garza ----------------------------- --------------------------------------- Name: Rafael Garza Title: Chief Comptroller

EXHIBIT INDEX EXHIBIT NO. DESCRIPTION - ----------- ----------- 1. Official communication, dated May 30, 2006, issued by CEMEX, S.A. de C.V., announcing that on May 25, 2006, its board of directors determined the CPO reference value for, and the final amount of, its previously announced stock dividend of US$0.1330 per CPO pursuant to the conditions approved by its shareholders at its General Shareholders' meeting held on April 27, 2006.

                                                                       Exhibit 1

   Capital Markets              Investor Relations             Analyst Relations
Jose Manuel Contreras           Abraham Rodriguez                Ricardo Sales
  (52 81) 8888-4092             (52 81) 8888-4262               (212) 317-6008



                                                                    May 30, 2006


                             Official Communication


CEMEX S.A. de C.V. (NYSE: CX) announced that on May 25, 2006, its board of
directors determined the CPO reference value for, and the final amount of, its
previously announced stock dividend of US$0.1330 per CPO pursuant to the
conditions approved by its shareholders at its General Shareholders' meeting
held on April 27, 2006.

The CPO reference value, which is the weighted average trading price of the CPOs
on the Mexican Stock Exchange on May 25, 2006, minus a 20% discount, was
determined to be Ps$52.5368 per CPO.

The final Mexican Peso amount of the dividend, which was calculated based on the
U.S. Dollar/Mexican Peso exchange rate in effect for May 25, 2006 as published
by Banco de Mexico, was determined to be Ps$1.4887 per CPO.

Set forth below are the details of the dividend calculation:

Weighted average CPO price                Ps$   65.6710
(20% discount)                            Ps$  (13.1342)
CPO reference value                       Ps$   52.5368

Declared dividend per CPO                 US$    0.1330
Foreign exchange rate                     Ps$   11.1935 per US$1.00
Dividend in Pesos per CPO                 Ps$    1.4887

Proportion of new CPOs                    52.5368 / 1.4887 = 35.2895


CPO holders will receive one new CPO for each 35.2895 CPOs held.

ADS holders will receive one new ADS, representing ten new CPOs, for each
35.2895 ADSs held (as each ADS represents 10 CPOs).

Distribution of new CPOs and ADSs will commence on or about June 6, 2006.


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