NEW YORK, Nov. 21 /PRNewswire/ -- Transocean Inc. (new) (NYSE: RIG) will replace Transocean Inc. (old) (NYSE: RIG) in the S&P 500 after the close of trading on Monday, November 26 . Transocean is acquiring GlobalSantaFe Corp. (NYSE: GSF) in a transaction that involves the shares of both companies being converted into a new class of stock.

Standard & Poor's will monitor this transaction, and post any relevant updates on its website: www.standardandpoors.com.

Transocean provides offshore contract drilling services for oil and gas wells. Headquartered in Houston , TX, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Oil & Gas Drilling Sub-Industry index.

    Following is a summary of the change:


                      S&P 500 INDEX - November 26, 2007

             COMPANY           GICS ECONOMIC SECTOR      GICS SUB-INDUSTRY
    ADDED    Transocean (new)         Energy             Oil & Gas Drilling
    DELETED  Transocean (old)         Energy             Oil & Gas Drilling

Additions to and deletions from an S&P equity index do not in any way reflect an opinion on the investment merits of the companies concerned.

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