-----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, I9fPE1oc7GLS2ZKHzx6QMUSFds3etW5Uo/dTNNlaNcSrMYpyPimv3g7EAgYYM5JG tsZntKXgJTEyJdu5wGkJfQ== 0001079817-03-000014.txt : 20030214 0001079817-03-000014.hdr.sgml : 20030214 20030214163435 ACCESSION NUMBER: 0001079817-03-000014 CONFORMED SUBMISSION TYPE: SC 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20030214 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: COSTAR GROUP INC CENTRAL INDEX KEY: 0001057352 STANDARD INDUSTRIAL CLASSIFICATION: SERVICES-COMPUTER PROCESSING & DATA PREPARATION [7374] IRS NUMBER: 522091508 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-54369 FILM NUMBER: 03568294 BUSINESS ADDRESS: STREET 1: 2 BETHESDA METRO CENTER STREET 2: 10TH FLOOR CITY: BETHESDA STATE: MD ZIP: 20814 BUSINESS PHONE: 3012158300 MAIL ADDRESS: STREET 1: 2 BETHESDA METRO CENTER CITY: BETHESDA STATE: MD ZIP: 20814 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: BROWN INVESTMENT ADVISORY & TRUST CO CENTRAL INDEX KEY: 0001079817 STATE OF INCORPORATION: MD FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13G BUSINESS ADDRESS: STREET 1: 19 SOUTH STREET CITY: BALTIMORE STATE: MD ZIP: 21202 BUSINESS PHONE: 4106376820 MAIL ADDRESS: STREET 1: 19 SOUTH STREET CITY: BALTIMORE STATE: MD ZIP: 21202 SC 13G 1 costar12312002.txt 13G COSTAR 12312002 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.________)* Costar Group Inc. (Name of Issuer) Common Stock (Par Value $.01) (Title of Class of Securities) 22160N109 (CUSIP Number) Check the following box if a fee is being paid with this statement [ ]. A fee is not required only if the filing person:(1)has a previous statement on file reporting beneficial ownership of more than five percent of the class of securities described in Item 1; and (2) has filed no amendment subsequent there to reporting beneficial ownership of five percent or less of such class.)(See Rule 13d-7.) 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). (Continued on following pages) Page 1 of 6 Pages CUSIP No. 22160N109 Page 2 of 6 1. NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Brown Investment Advisory & Trust Company ("BIATC"), its wholly owned subsidiary, Brown Investment Advisory Incorporated ("BAI"). 52-1811121 2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [x] 3. SEC USE ONLY 4. CITIZENSHIP OR PLACE OF ORGANIZATION Brown Investment Advisory & Trust Company and Brown Advisory Incorporated are Maryland corporations. NUMBER OF 5 SOLE VOTING POWER SHARES BIATC 269148 shares BAI 584635 shares 853783 shares BENEFICIALLY 6 SHARED VOTING POWER OWNED BY BIATC 0 shares BAI 0 shares 0 shares EACH REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH BIATC 269148 shares BAI 584635 shares 853783 shares 8 SHARED DISPOSITIVE POWER BIATC 0 shares BAI 0 shares 0 shares CUSIP No. 22160N109 Page 3 of 6 9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON BIATC 269148 shares BAI 584635 shares 853783 shares 10. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* [ ] 11. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) BIATC 1.7% BAI 3.7% 5.4% 12. TYPE OF REPORTING PERSON* BIATC - BK BAI - IA *SEE INSTRUCTIONS BEFORE FILLING OUT Item 1. (a) NAME OF ISSUER: Costar Group Inc. (b) Address of Issuer's Principal Executive Offices: 2 Bethesda Metro Center, Bethesda, MD 20814-5388 Item 2. (a) NAME OF PERSON FILING: Brown Investment Advisory & Trust Company ("BIATC"), its wholly owned subsidiary, Brown Investment Advisory Incorporated ("BAI"). (b) ADDRESS OF PRINCIPAL BUSINESS OFFICE: 901 South Bond Street, Suite 400 Baltimore, Maryland 21231 (c) CITIZENSHIP: Brown Investment Advisory & Trust Company and Brown Advisory Incorporated are Maryland corporations. CUSIP No. 22160N109 Page 4 of 6 (d) TITLE OF CLASS OF SECURITIES: Common Stock of ($.01 par) of Costar Group Inc. (e) CUSIP Number: 22160N109 Item 3. If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b), check whether the person filing is a: For BIATC (b) [x] Bank as defined in section 3(a)(6) of the Act For BAI (e) [x] Investment Adviser registered under section 203 of the Investment Advisers Act of 1940 Item 4. OWNERSHIP: (a) AMOUNT BENEFICIALLY OWNED: As of December 31, 2002 BIATC 269148 shares BAI 584635 shares 853783 shares (b) PERCENT OF CLASS: BIATC 1.7% BAI 3.7% 5.4% (c) Number of shares as to which such person has: (i) sole power to vote or to direct the vote: BIATC 269148 shares BAI 584635 shares 853783 shares CUSIP No. 22160N109 Page 5 of 6 (ii) shared power to vote or to direct the vote: BIATC 0 shares BAI 0 shares 0 shares (iii) sole power to dispose or to direct the disposition of: BIATC 269148 shares BAI 584635 shares 853783 shares (iv) shared power to dispose or to direct the disposition of: BIATC 0 shares BAI 0 shares 0 shares Item 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS. Not applicable 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 CUSIP No. 22160N109 Page 6 of 6 Item 10. CERTIFICATION. By signing below I certify that to the best of my knowledge and belief, the securities referred to above were acquired in the ordinary course of business and were not acquired for the purpose of and do not have the effect of changing or influencing the control of the issuer of such securities and were not acquired in connection with or as a participant in any transaction having such 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: As of December 31, 2002 Signature: Brown Investment Advisory & Trust Company By: /S/ Sandra J. Doeller Title: Principal Signature: Brown Investment Advisory Incorporated By: /S/ Sandra J. Doeller Title: Principal -----END PRIVACY-ENHANCED MESSAGE-----