13F-HR 1 a2199662z13f-hr.txt 13F-NT UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: June 30, 2010 ----------------------- Check Here if Amendment / /; Amendment Number: --------- This Amendment (Check only one.): / / is a restatement. / / adds new holdings entries. Institutional Investment Manager Filing this Report: Name: MLP Co-Investment Opportunity Fund, L.P. ---------------------------------------- Address: 6640 W. 143rd Street, Suite 200 ---------------------------------------- Overland Park, Kansas 66223 ---------------------------------------- Form 13F File Number: 28-13797 --------------------- The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing this Report on Behalf of Reporting Manager: Name: George E. Rider ------------------------------- Title: Vice President ------------------------------- Phone: (913) 928-6010 ------------------------------- Signature, Place, and Date of Signing: /S/George E. Rider Overland Park, Kansas August 2, 2010 ------------------------------- --------------------- -------------- [Signature] [City, State] [Date] Report Type (Check only one.): /X/ 13F HOLDINGS REPORT. (Check here if all holdings of this reporting manager are reported in this report.) / / 13F NOTICE. (Check here if no holdings reported are in this report, and all holdings are reported by other reporting manager(s).) / / 13F COMBINATION REPORT. (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).) List of Other Managers Reporting for this Manager: None. FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 1 -------------------- Form 13F Information Table Entry Total: 15 -------------------- Form 13F Information Table Value Total: $242,361 -------------------- (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report. No. Form 13F File Number Name 1 28-13796 MLP Opportunity Fund GP, L.L.C. ------ ----------------- --------------------------------- FORM 13F INFORMATION TABLE

COLUMN COLUMN COLUMN COLUMN COLUMN COLUMN COLUMN COLUMN 1 2 3 4 5 6 7 8 -------------------------------- ---------------- --------- -------- ---------------------- ---------- -------- -------------------- VALUE SHARES/ SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (~~x$1000~~x1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE -------------------------------- ---------------- --------- -------- --------- ----- ------ ---------- -------- ------- ------ ----- EL PASO PIPELINE PARTNERS L P COM UNIT LPI 283702108 2122,~~804~~844 ~~781~~796,800 SH DEFINED 1 ~~781~~796,800 0 0 ENERGY TRANSFER EQUITY L P COM UT LTD PTN 29273V100 1518,~~838~~036 ~~469~~534,400 SH DEFINED 1 ~~469~~534,400 0 0 ENERGY TRANSFER PRTNRS L P UNIT LTD PARTN 29273R109 5,~~689~~865 ~~121~~126,400 SH DEFINED 1 ~~121~~126,400 0 0 ENTERPRISE GP HLDGS L P UNIT LP INT 293716106 911,~~668~~862 ~~225~~250,100 SH DEFINED 1 ~~225~~250,100 0 0 ENTERPRISE PRODS PARTNERS L P COM 293792107 1721,~~390~~855 ~~502~~617,900 SH DEFINED 1 ~~502~~617,900 0 0 INERGY HLDGS L P COM 45661Q107 67,~~509~~083 89267,~~300~~900 SH DEFINED 1 89267,~~300~~900 0 0 INERGY L P UNIT LTD PTNR 456615103 2226,~~948~~764 ~~607~~676,~~080~~380 SH DEFINED 1 ~~607~~676,~~080~~380 0 0 K SEA TRANSN PARTNERS LP COM 48268Y101 53,~~098~~265 ~~568~~663,~~400~~629 SH DEFINED 1 ~~568~~663,~~400~~629 0 0 KINDER MORGAN ENERGY PARTNERS LP UT LTD PARTNER 494550106 9,~~486~~434 145,000 SH DEFINED 1 145,000 0 0 KINDER MORGAN MANAGEMENT LLC SHS 49455U100 3539,~~396~~602 ~~603~~699,~~816~~800 SH DEFINED 1 ~~603~~699,~~816~~800 0 0 MAGELLAN MIDSTREAM PRTNRS LP COM UNIT RP LP 559080106 78,~~927~~896 ~~166~~190,~~782~~282 SH DEFINED 1 ~~166~~190,~~782~~282 0 0 ONEOK PARTNERS LP UNIT LTD PARTN 68268N103 2124,~~420~~726 ~~349~~384,600 SH DEFINED 1 ~~349~~384,600 0 0 PAA NATURAL GAS STORAGE LP COM UNIT LTD 693139107 5,271 221,200 SH DEFINED 1 221,200 0 0 PLAINS ALL AMERN PIPELINE LP UNIT LTD PARTN 726503105 2530,~~400~~019 ~~446~~511,400 SH DEFINED 1 ~~446~~511,400 0 0 TARGA RESOURCES PARTNERS LP COM UNIT 87611X105 26,~~394~~839 90266,~~300~~719 SH DEFINED 1 90266,~~300~~719 0 0

Filing Compare · Tallgrass MLP Fund I, L.P.