13F-HR 1 cardinalfund13fhr.txt UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F COVER PAGE Report for the Calendar Quarter Ended: March 31, 2009 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: Cardinal Fund I, L.P. Address: 201 Main Street, Suite 1000 Fort Worth, Texas 76102 Form 13F File Number: 028-12931 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 and 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 Report Manager: Name: Jack A. Muhlbeier Title: Vice President of General Partner of General Partner Phone: 817/390-8400 Signature, Place, and Date of Signing: /s/ Jack A. Muhlbeier Fort Worth, Texas May 12, 2009 Report Type (Check only one.): [X] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ ] 13F COMBINATION REPORT. I AM SIGNING THIS REPORT AS REQUIRED BY THE SECURITIES EXCHANGE ACT OF 1934. FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 1 Form 13F Information Table Entry Total: 0 Form 13F Information Table Value Total: $0 List of Other Included Managers:

FORM 13F INFORMATION TABLE

Cardinal Fund I, LP 13F-HR