13F-HR/A 1 efc7-2563_emailfm13fhra.txt THIS FILING LISTS SECURITIES HOLDINGS REPORTED ON THE FORM 13F FILED ON MAY 15, 2007 PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT AND FOR WHICH SUCH CONFIDENTIAL TREATMENT EXPIRED ON NOVEMBER 14, 2007. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: March 31, 2007 -------------- Check here if Amendment [X]: Amendment Number: 2 --------------- This Amendment (Check only one): [_] is a restatement [X] adds new holdings entries Institutional Investment Manager Filing this Report: Name: Magnetar Financial, LLC Address: 1603 Orrington Avenue 13th Floor Evanston, IL 60201 Form 13F File Number: 028-11800 ----------- 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: Michael Turro Title: Chief Compliance Officer Phone: 847-905-4690 Signature, Place and Date of Signing: s/ Michael Turro Evanston, IL November 14, 2007 ------------------------------ ------------------ ----------------- [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).) FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 0 -------------------- Form 13F Information Table Entry Total: 2 -------------------- Form 13F Information Table Value Total: $130,931 -------------------- (in 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.
MAGNETAR FINANCIAL, LLC FORM 13F Quarter Ended March 31, 2007 --------------- ----- --------- --------- --------- --- ---- ---------- -------- ----------------------------------- VOTING AUTHORITY CLASS VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER ---------------- NAME OF ISSUER TITLE CUSIP (X$1,000) PRN AMT PRN CALL DISCRETION MANAGERS SOLE SHARED NONE --------------- ----- --------- --------- --------- --- ---- ---------- -------- ----------- --------- ----------- FIRST DATA CORP COM 319963104 $21,477 798,400 SH SOLE 798,400 --------------- ----- --------- --------- --------- --- ---- ---------- -------- ----------- --------- ----------- TXU CORP COM 873168108 $109,454 1,707,558 SH SOLE 1,707,558 --------------- ----- --------- --------- --------- --- ---- ---------- -------- ----------- --------- -----------