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Contact information for the IBM transfer agent Computershare Trust Company

On June 17, 2005, EquiServe was acquired by Computershare.

Stockholder inquiries and requests for financial information can be directed via e-mail to ibm@computershare.com

Questions about stockholders' accounts should be directed to:

Computershare
P.O. Box 43078
Providence, RI 02940-3078
(781) 575-2727
(888) IBM-6700

For instructions on transferring stock, call or write to:

Computershare
P.O. Box 43078
Providence, RI 02940-3078
(781) 575-2727
(888) IBM-6700

When sending stock certificates, you should send them unendorsed (with a tear-off form from your statement or a brief letter of instruction) to Computershare via registered or certified mail, with return receipt requested, or some other form of traceable mail, and properly insured.

Visit the transfer agent's Web site at www.computershare.com.

Investors with other requests may write or call:

IBM Stockholder Relations
IBM Corporation
New Orchard Road
Armonk, NY 10504
(914) 499-7777

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