| Filed On | Filing |
|---|---|
| 09 Jun 2017 | DEFA14A |
| 09 Jun 2017 | DEFA14A |
| 27 Apr 2007 | PRDEFA14A7_ONEOK |
| 26 Apr 2007 | PRDEFA14A_ONEOK |
| 17 Apr 2007 | VOTING |
| 30 Mar 2007 | DEFA 14A |
| 23 Mar 2007 | COMMON UNITHOLDER LETTER |
| 16 Mar 2007 | REMINDER LETTER |
| 06 Mar 2007 | DEFA14A |
| 23 Feb 2007 | SCHEDULE 14A |
| 02 Feb 2007 | DEFA14A_ONEOK |
| 02 Feb 2007 | DEFA14A_ONEOK |
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