Prospectus Supplement Filed Pursuant to Rule 424(b)(3)
(To Prospectus dated August 23, 2001) Registration Number 333-63980
$460,000,000
DIAMOND OFFSHORE DRILLING, INC.
1-1/2% CONVERTIBLE SENIOR DEBENTURES DUE 2031
This prospectus supplement relates to the resale by the holders of
our 1-1/2% Convertible Senior Debentures Due 2031 and the shares of our common
stock issuable upon the conversion of the debentures.
This prospectus supplement should be read in conjunction with, and
may not be delivered or utilized without, the prospectus dated August 23, 2001.
The terms of the debentures are set forth in the prospectus.
The information in the table appearing under the heading "Selling
Securityholders" in the prospectus is amended by adding the information below
with respect to persons not previously listed in the prospectus and by
supplementing the information with respect to other persons previously listed in
the prospectus that are listed below.
PRINCIPAL AMOUNT OF PERCENTAGE OF NUMBER OF
DEBENTURES BENEFICIALLY DEBENTURES CONVERSION SHARES
NAME (1) OWNED THAT MAY BE SOLD OUTSTANDING THAT MAY BE SOLD (2)
-------- ---------------------- ----------- --------------------
UBS Securities LLC................... $ 450,000 .10% 9,179
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(1) Information concerning other selling holders of debentures will be set
forth in prospectus supplements from time to time, if required.
(2) The conversion shares do not total 9,382,988 shares due to rounding
resulting from the elimination of fractional shares.
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The date of this prospectus supplement is July 23, 2003.