13F-HR 1 v13fduemay152009.txt 13F-HR 05/15/09 0001103804 dk2hcr*f NONE 1 Carl Casler 203-863-5039 ccasler@vikingglobal.com 13F-HR Form 13F Holdings Report 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, 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: Viking Global Investors LP Address: 55 Railroad Avenue, Greenwich, CT 06830 Form 13F File Number:28-05515 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 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: Carl Casler Title: Chief Financial Officer Phone: 203-863-5039 Signature, Place and Date of Signing: /s/ Carl Casler, Greenwich, CT, May 15, 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: 0 Form 13F Information Table Entry Total: 33 Form 13F Information Table Value Total: 3,575,160 ------------- Thousands List of Other Included Managers: Provide a numbered list of the names(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. NONE TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER CLASS Cusip X($1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE ACE Ltd. COMMON STOCK H0023R105 55049 1362600 SH SOLE 1362600 Alliance Data Systems Corp. COMMON STOCK 018581108 8025 221200 SH SOLE 221200 Aon Corp COMMON STOCK 037389103 33431 819000 SH SOLE 819000 Apollo Group, Inc. COMMON STOCK 037604105 452849 5781300 SH SOLE 5781300 Career Education Corp COMMON STOCK 141665109 111816 4666800 SH SOLE 4666800 Charles River Laboratories COMMON STOCK 159864107 66882 2458000 SH SOLE 2458000 Cognizant Technology Solutions Corp COMMON STOCK 192446102 115912 5575400 SH SOLE 5575400 CVS/Caremark Corp COMMON STOCK 126650100 28771 1046600 SH SOLE 1046600 Danaher Corp COMMON STOCK 235851102 52669 971400 SH SOLE 971400 DaVita Inc. COMMON STOCK 23918K108 96404 2193500 SH SOLE 2193500 First Horizon National Corp COMMON STOCK 320517105 41937 3904761 SH SOLE 3904761 Google Inc. COMMON STOCK 38259P508 208313 598500 SH SOLE 598500 Illumina Inc. COMMON STOCK 452327109 53580 1438800 SH SOLE 1438800 Invesco Limited COMMON STOCK G491BT108 317413 22901400 SH SOLE 22901400 JP Morgan Chase & Co. COMMON STOCK 46625H100 147404 5545700 SH SOLE 5545700 Lender Processing Services COMMON STOCK 52602E102 55982 1828900 SH SOLE 1828900 Macrovision Solutions Corp COMMON STOCK 55611C108 70081 3939350 SH SOLE 3939350 Mastercard Inc COMMON STOCK 57636Q104 447322 2670900 SH SOLE 2670900 McKesson Corp. COMMON STOCK 58155Q103 48824 1393400 SH SOLE 1393400 MSCI Inc COMMON STOCK 55354G100 107363 6349100 SH SOLE 6349100 NRG Energy Inc COMMON STOCK 629377508 121425 6899200 SH SOLE 6899200 Oracle Corporation COMMON STOCK 68389X105 29506 1632900 SH SOLE 1632900 Palm Inc COMMON STOCK 696643105 874 101798 SH SOLE 101798 Priceline.com COMMON STOCK 741503403 190545 2418700 SH SOLE 2418700 Qualcomm Inc COMMON STOCK 747525103 254093 6530300 SH SOLE 6530300 Suntrust Banks Inc COMMON STOCK 867914103 21519 1833000 SH SOLE 1833000 Teleflex Inc COMMON STOCK 879369106 23117 591400 SH SOLE 591400 The Travelers Companies COMMON STOCK 89417E109 64264 1581300 SH SOLE 1581300 Thermo Fisher Scientific Inc. COMMON STOCK 883556102 51757 1451000 SH SOLE 1451000 Thoratec Corp. COMMON STOCK 885175307 20960 815900 SH SOLE 815900 Universal Health Services Inc COMMON STOCK 913903100 17042 444500 SH SOLE 444500 Visa Inc COMMON STOCK 92826C839 207093 3724700 SH SOLE 3724700 Wal-Mart Stores Inc COMMON STOCK 931142103 52938 1016100 SH SOLE 1016100 S REPORT SUMMARY 33 DATA RECORDS