0001011443-12-000003.txt : 20120214 0001011443-12-000003.hdr.sgml : 20120214 20120214152318 ACCESSION NUMBER: 0001011443-12-000003 CONFORMED SUBMISSION TYPE: 13F-HR/A PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20101231 FILED AS OF DATE: 20120214 DATE AS OF CHANGE: 20120214 EFFECTIVENESS DATE: 20120214 FILER: COMPANY DATA: COMPANY CONFORMED NAME: HBK INVESTMENTS L P CENTRAL INDEX KEY: 0001011443 IRS NUMBER: 752622581 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR/A SEC ACT: 1934 Act SEC FILE NUMBER: 028-06078 FILM NUMBER: 12608646 BUSINESS ADDRESS: STREET 1: 2101 CEDAR SPRINGS ROAD STREET 2: STE 700 CITY: DALLAS STATE: TX ZIP: 75201 BUSINESS PHONE: 2147586100 MAIL ADDRESS: STREET 1: 2101 CEDAR SPRINGS ROAD STREET 2: STE 700 CITY: DALLAS STATE: TX ZIP: 75201 13F-HR/A 1 a1public13f4q2010.txt CONFIDENTIAL TO PUBLIC 13F 4Q 2010 THIS FILING LISTS SECURITIES HOLDINGS REPORTED ON THE FORM 13F FILED ON FEBRUARY 14, 2011 PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT AND FOR WHICH THAT REQUEST FOR CONFIDENTIAL TREATMENT HAS EXPIRED UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F COVER PAGE Report for the Calendar Quarter ended: 12/31/2010 Check here if Amendment [X]; Amendment Number: 1 This Amendment (check only one.): [ ] is a restatement. [X] adds new holdings entries. Institutional Investment Manager Filing this Report: Name: HBK Investments L.P. (1) Address: 2101 Cedar Springs Road, Suite 700 Dallas, Texas 75201 Form 13F File Number: 28-6078 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 Report Manager: Name: Jon L. Mosle Title: General Counsel Phone: (214) 758-6107 Signature, Place, and Date of Signing: /X/ Jon L. Mosle Dallas, Texas February 14, 2012 General Counsel 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: 3 Form 13F Information Table Value Total: $676,739 (thousands) List of Other Included Managers: NONE (1) HBK Investments L.P. has delegated discretion to vote and dispose of the securities described below to HBK Services LLC ("Services"). Services may, from time to time, delegate discretion to vote and dispose of certain of such Securities to one or more subadvisors. Each of Services and such subadvisors is under common control with HBK Investments L.P. The filing of this report shall not be deemed an admission that such subadvisors are, for the purpose of Section 13(d) or 13(g) of the Securities Exchange Act of 1934, beneficial owners of such securities. CONFIDENTIAL FORM 13F INFORMATION TABLE

TITLE OF VALUE SHARES/ SH/ PUT/ INVSTMNT OTHR VOTING AUTHORITY NAME OF ISSUER CLASS CUSIP (X$1000) PRN AMT PRN CLL DISCRETN MGRS SOLE SHRD NONE ALCON INC COM SHS H01301102 284591 1741685 SHR SOLE 1741685 0 0 BUCYRUS INTL INC NEW COM 118759109 179122 2003600 SHR SOLE 2003600 0 0 MCAFEE INC COM 579064106 213026 4600000 SHR SOLE 4600000 0 0