Questions on transferring IBM stock should be directed to:
P.O. Box 505005
Louisville, KY 40233-5005
(888) IBM-6700 (United States, Canada and Puerto Rico)
(781) 575-2727 (all other areas)
Stock transfer instructions and forms are provided by Computershare at https://www-us.computershare.com/Investor/#Help/PrintableForms
When sending IBM stock certificates to Computershare, you should send them unendorsed (with a brief letter of instruction) 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.