0000052388-11-000032.txt : 20110805 0000052388-11-000032.hdr.sgml : 20110805 20110805112555 ACCESSION NUMBER: 0000052388-11-000032 CONFORMED SUBMISSION TYPE: 13F-NT PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20110630 FILED AS OF DATE: 20110805 DATE AS OF CHANGE: 20110805 EFFECTIVENESS DATE: 20110805 FILER: COMPANY DATA: COMPANY CONFORMED NAME: AMERICAN CENTURY INVESTMENT MANAGEMENT INC CENTRAL INDEX KEY: 0000052388 IRS NUMBER: 440640487 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-NT SEC ACT: 1934 Act SEC FILE NUMBER: 028-01091 FILM NUMBER: 111012882 BUSINESS ADDRESS: STREET 1: 4500 MAIN STREET CITY: KANSAS CITY STATE: MO ZIP: 64111 BUSINESS PHONE: 816-531-5575 MAIL ADDRESS: STREET 1: 4500 MAIN STREET CITY: KANSAS CITY STATE: MO ZIP: 64111 FORMER COMPANY: FORMER CONFORMED NAME: INVESTORS RESEARCH CORP DATE OF NAME CHANGE: 19920929 13F-NT 1 aci0611.txt ACIM FORM 13-F NT 06/30/11 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F Form 13F COVER PAGE Report for the Calendar Year or Quarter Ended: 06/30/2011 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: American Century Investment Management, Inc. Address: 4500 Main Kansas City, MO 64111 13F File Number: 28-01091 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: Otis H. Cowan Title: Vice President Phone: 816-531-5575 Signature, Place, and Date of Signing: /s/Otis H. Cowan Kansas City, MO August 5, 2011 Report Type (Check only one.): [ ] 13F HOLDINGS REPORT. [ X] 13F NOTICE. [ ] 13F COMBINATION REPORT. List of Other Managers Reporting for this Manager: Form 13F File Number Name 28-11918 American Century Companies, Inc.