-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, AfYF9GdHfN2Eyw60o2xM9AgbbpWIC17Sb4C/GrsujvcMJBpSakifRkCjIkAeVtSE ES3JZzoLd4bMfTw2NaW2gA== 0000908733-10-000191.txt : 20100513 0000908733-10-000191.hdr.sgml : 20100513 20100513134940 ACCESSION NUMBER: 0000908733-10-000191 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20100331 FILED AS OF DATE: 20100513 DATE AS OF CHANGE: 20100513 EFFECTIVENESS DATE: 20100513 FILER: COMPANY DATA: COMPANY CONFORMED NAME: COLUMBIA WANGER ASSET MANAGEMENT LP CENTRAL INDEX KEY: 0000908733 IRS NUMBER: 363820584 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-03639 FILM NUMBER: 10827668 BUSINESS ADDRESS: STREET 1: 227 W MONROE STREET STREET 2: SUITE 3000 CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3126349231 MAIL ADDRESS: STREET 1: 227 W MONROE ST STREET 2: STE 3000 CITY: CHICAGO STATE: IL ZIP: 60606 FORMER COMPANY: FORMER CONFORMED NAME: LIBERTY WANGER ASSET MANAGEMENT LP DATE OF NAME CHANGE: 20010220 FORMER COMPANY: FORMER CONFORMED NAME: WANGER ASSET MANAGEMENT LP DATE OF NAME CHANGE: 19990108 13F-HR 1 cwam13fhr.txt WANGER 13F-HR UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 Form 13F Form 13F Cover Page Report for the Quarter Ended March 31, 2010 Check here if Amendment [ ] This Amendment (check only one) [ ] is a restatement [ ] adds new holdings Institutional Investment Manager Filing this Report: Columbia Wanger Asset Management, L.P. 227 West Monroe Street Suite 3000 Chicago, IL 60606 Form 13F File Number: 028-03639 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: Bruce H. Lauer Senior Vice President 312-634-9230 Signature, Place, and Date of Signing: /s/ Bruce H. Lauer Chicago, IL May 13, 2010 Report Type: [X] 13F HOLDINGS REPORT [ ] 13F NOTICE [ ] 13F COMBINATION REPORT List of Other Managers Reporting for this Manager: None 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 0 Form 13F Information Table Entry Total: 347 Form 13F Information Table Value Total: 20,239,388,000 VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER ISSUE CLASS CUSIP (X1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE - ------------------------------ ------------ --------- -------- --------- --- ---- ------- ------------ --------- ------------------ AFC ENTERPRISES INC COM 00104Q107 22726 2118000 SH SOLE 2000000 0 118000 AMAG PHARMACEUTICALS INC COM 00163U106 42667 1222200 SH SOLE 1164200 0 58000 AARONS INC COM 002535201 34424 1032500 SH SOLE 1032500 0 0 ABERCROMBIE & FITCH CO CL A 002896207 264379 5792700 SH SOLE 5649700 0 143000 ABOVENET INC COM 00374N107 37236 734000 SH SOLE 704000 0 30000 ACORDA THERAPEUTICS INC COM 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