-----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, Watq46ZDGECDM8JSyKgo2TIaI/rGu1kvjZ8E2OCs5Cw42416dUpZWe0NEcuI5/ra 7undsyAt1EfujrFWnkp2CQ== 0000891804-05-000550.txt : 20050214 0000891804-05-000550.hdr.sgml : 20050214 20050214150047 ACCESSION NUMBER: 0000891804-05-000550 CONFORMED SUBMISSION TYPE: SC 13G/A PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20050214 DATE AS OF CHANGE: 20050214 GROUP MEMBERS: COLUMBIA ACORN TRUST SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: CARBO CERAMICS INC CENTRAL INDEX KEY: 0001009672 STANDARD INDUSTRIAL CLASSIFICATION: ABRASIVE ASBESTOS & MISC NONMETALLIC MINERAL PRODUCTS [3290] IRS NUMBER: 721100013 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A SEC ACT: 1934 Act SEC FILE NUMBER: 005-48851 FILM NUMBER: 05608481 BUSINESS ADDRESS: STREET 1: 6565 MACARTHUR BOULEVARD STREET 2: SUITE 1050 CITY: IRVING STATE: TX ZIP: 75039 BUSINESS PHONE: 2144010090 MAIL ADDRESS: STREET 1: 6565 MACARTHUR BOULEVARD STREET 2: SUITE 1050 CITY: IRVING STATE: TX ZIP: 75039 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: COLUMBIA ACORN TRUST CENTRAL INDEX KEY: 0000002110 IRS NUMBER: 362692100 STATE OF INCORPORATION: MA FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G/A BUSINESS ADDRESS: STREET 1: 227 W MONROE STE 3000 CITY: CHICAGO STATE: IL ZIP: 60606 BUSINESS PHONE: 3126349200 MAIL ADDRESS: STREET 1: 227 W MONROE STE 3000 CITY: CHICAGO STATE: IL ZIP: 60606 FORMER COMPANY: FORMER CONFORMED NAME: LIBERTY ACORN TRUST DATE OF NAME CHANGE: 20010424 FORMER COMPANY: FORMER CONFORMED NAME: ACORN INVESTMENT TRUST DATE OF NAME CHANGE: 19940204 FORMER COMPANY: FORMER CONFORMED NAME: ACORN FUND INC DATE OF NAME CHANGE: 19920703 SC 13G/A 1 carboexit.txt CARBO CERAMICS INC. UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* ___ Carbo Ceramics Inc. - -------------------------------------------------------------------------------- (Name of Issuer) Common Stock - -------------------------------------------------------------------------------- (Title of Class of Securities) 140781105 --------------------------------------------- (CUSIP Number) December 31, 2004 -------------------------------------------------------------- (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [x] Rule 13d-1(b) [ ] Rule 13d-1(c) [ ] Rule 13d-1(d) *The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). CUSIP No. 140781105 13G Page 2 of 5 Pages - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSON S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Columbia Acorn Trust - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* Not Applicable (a) [ ] (b) [ ] - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Massachusetts - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF None SHARES ---------------------------------------------------------- 6 SHARED VOTING POWER BENEFICIALLY 771,000 OWNED BY ---------------------------------------------------------- 7 SOLE DISPOSITIVE POWER EACH None REPORTING ---------------------------------------------------------- 8 SHARED DISPOSITIVE POWER PERSON WITH 771,000 - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 771,000 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* Not Applicable [ ] - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9 4.8% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON* IA - -------------------------------------------------------------------------------- Item 1(a) Name of Issuer: Carbo Ceramics Inc. Item 1(b) Address of Issuer's Principal Executive Offices: 6565 MacArthur Boulevard Suite 1050 Irving, Texas 75039 Item 2(a) Name of Person Filing: Columbia Acorn Trust ("Acorn") Item 2(b) Address of Principal Business Office: Acorn is located at: 227 West Monroe Street, Suite 3000 Chicago, Illinois 60606 Item 2(c) Citizenship: Acorn is a Massachusetts business trust. Item 2(d) Title of Class of Securities: Common Stock Item 2(e) CUSIP Number: 140781105 Item 3 Type of Person: (d) Acorn is an Investment Company under section 8 of the Investment Company Act. Item 4 Ownership (at December 31, 2004): (a) Amount owned "beneficially" within the meaning of rule 13d-3: 771,000 (b) Percent of class: 4.8% (based on 15,975,762 shares outstanding as of October 26, 2004) (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: none (ii) shared power to vote or to direct the vote: 771,000 (iii) sole power to dispose or to direct the disposition of: none (iv) shared power to dispose or to direct disposition of: 771,000 Item 5 Ownership of Five Percent or Less of a Class: If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following [X]. Item 6 Ownership of More than Five Percent on Behalf of Another Person: Not Applicable Item 7 Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company: Not Applicable Item 8 Identification and Classification of Members of the Group: Not Applicable Item 9 Notice of Dissolution of Group: Not Applicable Item 10 Certification: By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. Signature After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Date: February 14, 2005 COLUMBIA ACORN TRUST By: /s/ Bruce H. Lauer ------------------------------------------- Bruce H. Lauer Vice President, Treasurer and Secretary -----END PRIVACY-ENHANCED MESSAGE-----