Computershare CIP
IBM stock can be bought through a stock brokerage firm, bank, or generally through a financial institution that provides brokerage services. The IBM transfer agent, Computershare Trust Company, N.A., not IBM, also sponsors and administers the Computershare CIP which contains a direct stock purchasing feature and Dividend Reinvestment Plan.
You can obtain information on the Computershare CIP by going to Computershare Trust Company, N.A.