Transocean Proxy Statement and 2010 Annual Report

SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS
Listed below are the only persons who, to the knowledge of the Company, may be deemed to be
beneficial owners as of March 16, 2011, of more than 5% of the Company’s shares.
Shares Percent of
Name and Address of Beneficial Owner Beneficially Owned Class(1)
FMR LLC ................................ 19,165,692(2) 6.0%
82 Devonshire Street
Boston, Massachusetts 02109
(1) The percentage indicated is based on the 319,531,126 outstanding shares at March 16, 2011.
(2) The number of shares held by FMR LLC is based on a statement on Schedule 13G filed with the SEC on
February 14, 2011, which was filed jointly by FMR LLC, Edward C. Johnson 3d, and Fidelity Management &
Research Company. According to the filing, FMR LLC has sole voting power over 2,891,991 shares and sole
dispositive power over 19,165,692 shares and shared voting or dispositive power over no shares. Of the shares
reported, 15,660,402 shares are beneficially owned by Fidelity Management & Research Company, an investment
adviser and a wholly-owned subsidiary of FMR LLC, as a result of acting as investment advisor to various investment
companies (collectively, the ‘‘Fidelity Funds’’); with respect to these shares, FMR LLC, Mr. Edward C. Johnson 3d
and each of the Fidelity Funds exercise sole dispositive power and the Fidelity Funds’ Board of Trustees exercises
sole voting power.
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