0001193125-11-218943.txt : 20110811 0001193125-11-218943.hdr.sgml : 20110811 20110811091257 ACCESSION NUMBER: 0001193125-11-218943 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20110630 FILED AS OF DATE: 20110811 DATE AS OF CHANGE: 20110811 EFFECTIVENESS DATE: 20110811 FILER: COMPANY DATA: COMPANY CONFORMED NAME: FRONTIER CAPITAL MANAGEMENT CO LLC CENTRAL INDEX KEY: 0000351173 IRS NUMBER: 042715137 STATE OF INCORPORATION: MA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-01185 FILM NUMBER: 111026071 BUSINESS ADDRESS: STREET 1: 99 SUMMER ST CITY: BOSTON STATE: MA ZIP: 02110 BUSINESS PHONE: 6172610777 MAIL ADDRESS: STREET 1: 99 SUMMER ST CITY: BOSTON STATE: MA ZIP: 02110 FORMER COMPANY: FORMER CONFORMED NAME: FRONTIER CAPITAL MANAGEMENT CO INC DATE OF NAME CHANGE: 19990326 FORMER COMPANY: FORMER CONFORMED NAME: FRONTIER CAPITAL MANAGEMENT CORP DATE OF NAME CHANGE: 19810306 13F-HR 1 d13fhr.txt 13F-HR UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarter Ended: June 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: Frontier Capital Management Co., LLC Address: 99 Summer Street, 19th Floor Boston, MA 02110 13F File Number: 28-01185 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: Mr. William J. Ballou Title: Chief Operating Officer & General Counsel Phone: (617) 261-0777 Signature, Place and Date of Signing: /S/ William J. Ballou Boston, MA August 11, 2011 ------------------------- ------------------------ ------------------------- [Signature] [City, State] [Date] Report Type [X] 13 F HOLDINGS REPORT [_] 13 F NOTICE [_] 13 F COMBINATION REPORT I am signing this report as required by the Securities Exchange Act of 1934. SEC13F.LNS FRONTIER CAPITAL MANAGEMENT FORM 13F SUMMARY PAGE AS OF DATE: 06/30/11 RUN DATE: 07/01/11 3:27 P.M. REPORT SUMMARY: NUMBER OF OTHER INCLUDED MANAGERS: 0 FORM 13F INFORMATION TABLE ENTRY TOTAL: 324 FORM 13F INFORMATION TABLE VALUE TOTAL: $10,386,152,652.00 LIST OF OTHER INCLUDED MANAGERS: NO. 13F FILE NUMBER NAME

NAME OF ISSUER CLASS CUSIP (x$1000) PRN AMT PRN DSCRETN SOLE SHARED NONE -------------------------------------- ----- --------- ----------- ---------- --- ------- ---------- -------- -------- A. Schulman Inc. COM 808194104 4680 185775 SH SOLE 126650 0 59125 A.O. Smith Corp. COM 831865209 26893 635774 SH SOLE 406245 0 229529 Abbott Laboratories COM 002824100 3398 64580 SH SOLE 64580 0 0 Abraxas Petroleum Corp. COM 003830106 15745 4111010 SH SOLE 2590390 0 1520620 Accretive Health Inc. COM 00438V103 44647 1550794 SH SOLE 990110 0 560684 Actuant Corp. (Cl A) COM 00508X203 2679 99842 SH SOLE 78041 0 21801 Adtran Inc. COM 00738A106 51234 1323542 SH SOLE 794889 0 528653 Advisory Board Co. COM 00762W107 33979 587053 SH SOLE 377907 0 209146 Agilent Technologies Inc. COM 00846U101 65049 1272729 SH SOLE 801000 0 471729 Alaska Air Group Inc. COM 011659109 64011 935017 SH SOLE 560080 0 374937 Albany International Corp. (Cl A) COM 012348108 5003 189564 SH SOLE 118284 0 71280 Albemarle Corp. 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COM 98884U108 7700 574603 SH SOLE 357940 0 216663 LINE COUNT: 324