July 11, 2006

CEMEX S.A.B. de C.V. (NYSE: CX) announced today that beginning on July 17, 2006, trading in its Ordinary Participation Certificates ("CPOs") and beginning on July 24, 2006 trading in its American Depositary Shares ("ADSs") will reflect its previously announced two-for-one stock split.

In connection with the stock split, which was approved by CEMEX's shareholders on April 27, 2006, each of CEMEX's existing series A shares will be surrendered in exchange for two new series A shares, and each of CEMEX's existing series B shares will be surrendered in exchange for two new series B shares. Each existing CPO, which represents two existing series A shares and one existing series B share, will be surrendered in exchange for two new CPOs. Each new CPO will represent two new series A shares and one new series B share. The new CPOs will be identical in all material respects to the existing CPOs.

Beginning on July 24, 2006, trading on the New York Stock Exchange will reflect the stock split as each ADS holder will receive one additional ADS for every existing ADS, each representing ten new CPOs. During the period between July 17 and July 21, 2006, the number of CEMEX's existing ADSs, each of which currently represents ten CPOs, will not change; instead it will include the right to receive an additional ADS on July 24, 2006.

The proportional equity interest participation of existing shareholders in both CPOs and ADSs will not change as a result of the stock split.

CEMEX is a growing global building solutions company that provides high quality products and reliable service to customers and communities in more than 50 countries throughout the world. Commemorating its 100th anniversary in 2006, CEMEX has a rich history of improving the well-being of those it serves through its efforts to pursue innovative industry solutions and efficiency advancements and to promote a sustainable future. For more information, visit www.cemex.com.

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