100
NE Adams
Street
Peoria,
Illinois
61629
May
18,
2006
Dear
Stockholder:
According
to our
latest records, we have not yet received your proxy for the important Annual
Meeting of Stockholders of Caterpillar Inc., to be held on June 14, 2006.
Your
Board
of Directors unanimously recommends that stockholders vote FOR Proposals 1,
2,
3, 4 and 5, and AGAINST Proposals 6, 7 and 8,
as detailed in the
proxy statement previously provided to you.
Please
help your
company avoid the expense of further solicitation - vote
your
proxy TODAY
by
telephone,
via
the
Internet, or by signing and returning the enclosed proxy
card.
(Please
note your
vote and this reminder may have crossed in the mail. If so, we encourage you
to
vote again to ensure representation at the meeting. Your vote will only be
counted once.)
Thank
you for your
cooperation.
Very
truly
yours,
/s/
James B. Buda
James
B.
Buda
Vice
President,
General Counsel and Secretary
|
IMPORTANT
NOTE:
Remember,
you can vote by telephone or via
the
Internet --
Simply
follow the easy instructions on the enclosed
proxy
or voting instruction card.
If
you have
any questions, or need assistance voting
of
your
shares, please call our proxy solicitor,
INNISFREE
M&A INCORPORATED
TOLL-FREE,
at 1-877-687-1865.
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