Transfer Agent, Registrar and Dividend Disbursing Agent:

Computershare Trust Company, N.A.

For more information call 1-866-235-0232 (within the U.S. and Canada) or 1-781-575-4709 (outside the U.S. and Canada), or write:

For standard U.S. postal mail: P.O. Box 43078 Providence, RI 02940-3078

For overnight/express delivery: ATTN: Priority Processing 250 Royall Street Canton, MA 02021

Shareholders should contact Computershare Trust Company, N.A., ONEOK's Transfer Agent, Registrar and Dividend Disbursing Agent with questions concerning:

Stock Ownership Dividend Payments Dividend Check Replacement Direct Deposit of Dividends Reinvestment of Dividends Withdrawals or Liquidation from a Dividend Reinvestment Account

Transfer Requirements Name Changes Change of Address Lost Stock Certificate Stock Certificate Safekeeping Duplicate Mailings

All other shareholder questions should be directed to ONEOK's Investor Relations department:

Investor Relations Department ONEOK, Inc. P.O. Box 871 Tulsa, OK 74102-0871

Dan Harrison Phone: 1-918-588-7950 E-mail: Dan.Harrison@oneok.com

Christy Williamson Phone 1-918-588-7163 E-mail: Christy.Williamson@oneok.com