May 10, 2021
Dear Fellow Shareholder:
We have previously mailed you proxy materials for the ONEOK, Inc. Annual Meeting of Shareholders to be held virtually on May 26, 2021.
According to our latest records, we have not yet received your vote. The virtual Annual Meeting is now only a short time away and your vote is important.
In the event that your proxy materials have been misplaced, we are enclosing for your use a duplicate Voting Instruction Form and return envelope.
Please vote your shares via the internet or by telephone following the instructions on the enclosed Voting Instruction Form or complete, sign, date and mail your Voting Instruction Form today in order to make sure that your shares will be voted at the meeting in accordance with your desires.
If you hold your shares in the name of a brokerage firm, your broker cannot vote your shares on several of the proposals unless your broker receives your specific instructions.
Your board of directors recommends that you vote:
| • | | FOR all nominees for director in proposal 1 |
Please follow the telephone or internet voting instructions on your Voting Instruction Form or complete, sign, date and mail the enclosed Voting Instruction Form and vote your shares today. In the event that two Voting Instruction Forms are received from you, the one bearing the latest date will be counted, as it automatically revokes all prior votes.
Thank you for voting and for your continued support.
Sincerely,
John W. Gibson
Chairman of the Board
ONEOK, Inc.
100 West Fifth Street
Tulsa, OK 74103
www.oneok.com