UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2013 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: CSat Investment Advisory, L.P. Address: 625 Avis Drive Ann Arbor, Michigan 48108 13F File Number: 028-13818 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: John Cattier Title: Manager of the General Partner Phone: 734.623.1320 Signature, Place, and Date of Signing: /s/ John Cattier Ann Arbor, Michigan/USA May 15, 2013 Report Type (Check only one.): [ X] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ ] 13F COMBINATION REPORT. FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 0 Form 13F Information Table Entry Total: 21 Form 13F Information Table Value Total: $258,756 (thousands) List of Other Included Managers: Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional managers with respect to which this report is filed, other than the manager filing this report. NONE FORM 13F INFORMATION TABLE VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE ------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- -------- AMAZON COM INC COM 023135106 16811 63084 SH SOLE 63084 APPLE INC COM 037833100 19860 44866 SH SOLE 44866 ATMOS ENERGY CORP COM 049560105 2921 68421 SH SOLE 68421 CENTERPOINT ENERGY INC COM 15189T107 2253 94020 SH SOLE 94020 COSTCO WHSL CORP NEW COM 22160K105 15108 142384 SH SOLE 142384 DISH NETWORK CORP CL A 25470M109 11589 305784 SH SOLE 305784 DR PEPPER SNAPPLE GROUP INC COM 26138E109 11794 251197 SH SOLE 251197 EBAY INC COM 278642103 12014 221585 SH SOLE 221585 GOOGLE INC CL A 38259P508 13759 17325 SH SOLE 17325 IAC INTERACTIVECORP COM PAR $.001 44919P508 10619 237667 SH SOLE 237667 INTERCONTINENTAL HTLS GRP PL SPON ADR NEW 12 45857P400 11138 366131 SH SOLE 366131 JETBLUE AIRWAYS CORP COM 477143101 13971 2024791 SH SOLE 2024791 JPMORGAN CHASE & CO COM 46625H100 12293 259013 SH SOLE 259013 NIKE INC CL B 654106103 10774 182580 SH SOLE 182580 NORDSTROM INC COM 655664100 13227 239485 SH SOLE 239485 PAPA JOHNS INTL INC COM 698813102 14276 230942 SH SOLE 230942 PROGRESSIVE CORP OHIO COM 743315103 12491 494311 SH SOLE 494311 SEMPRA ENERGY COM 816851109 3459 43275 SH SOLE 43275 UNILEVER N V N Y SHS NEW 904784709 12412 302732 SH SOLE 302732 WHIRLPOOL CORP COM 963320106 20619 174058 SH SOLE 174058 WHOLE FOODS MKT INC COM 966837106 17368 200205 SH SOLE 200205