0000934999-11-000007.txt : 20110421 0000934999-11-000007.hdr.sgml : 20110421 20110421133241 ACCESSION NUMBER: 0000934999-11-000007 CONFORMED SUBMISSION TYPE: 13F-HR PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20110331 FILED AS OF DATE: 20110421 DATE AS OF CHANGE: 20110421 EFFECTIVENESS DATE: 20110421 FILER: COMPANY DATA: COMPANY CONFORMED NAME: DF DENT & CO INC CENTRAL INDEX KEY: 0000934999 IRS NUMBER: 521045317 STATE OF INCORPORATION: MD FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 13F-HR SEC ACT: 1934 Act SEC FILE NUMBER: 028-03691 FILM NUMBER: 11772961 BUSINESS ADDRESS: STREET 1: 2 EAST READ STREET STREET 2: 6TH FLOOR CITY: BALTIMORE STATE: MD ZIP: 21202 BUSINESS PHONE: 4108372544 MAIL ADDRESS: STREET 1: DF DENT & CO INC STREET 2: 2 EAST READ ST CITY: BALTIMORE STATE: MD ZIP: 21202 13F-HR 1 inftable.txt MARCH 2011 13F REPORT FORM 13F INFORMATION TABLE VALUE SHARES/ SH/ PUT/ INVSTMT OTHER VOTING AUTHORITY NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DSCRETN MANAGERS SOLE SHARED NONE ------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- -------- 3M CO COM 88579Y101 518 5543 SH Sole 5543 ABBOTT LABORATORIES COM 002824100 1050 21405 SH Sole 21405 ACTUANT CORP A COM 00508X203 4963 171147 SH Sole 171147 ADTRAN INC COM 00738A106 32115 756364 SH Sole 756364 AGNICO-EAGLE MINES LTD COM 008474108 14420 217334 SH Sole 217334 ALTERA CORP COM 021441100 239 5418 SH Sole 5418 AMDOCS LIMITED COM G02602103 166 5750 SH Sole 5750 AMERICAN PUBLIC EDUCATION INC COM 02913V103 43438 1073863 SH Sole 1073863 AMERICAN TOWER CORP COM 029912201 60624 1169898 SH Sole 1169898 AMGEN INC COM 031162100 73 1366 SH Sole 1366 ANADARKO PETROLEUM CORP COM 032511107 229 2800 SH Sole 2800 ANSYS INC COM 03662Q105 126597 2336163 SH Sole 2336163 APACHE CORP COM 037411105 48318 369066 SH Sole 369066 APPLE COMPUTER INC COM 037833100 897 2574 SH Sole 2574 AUTOMATIC DATA PROCESSING COM 053015103 1982 38635 SH Sole 38635 BAKER HUGHES, INC. COM 057224107 179 2433 SH Sole 2433 BEACON ROOFING SUPPLY INC COM 073685109 50298 2457151 SH Sole 2457151 BERKSHIRE HATHAWAY INC COM 084670108 626 5 SH Sole 5 BERKSHIRE HATHAWAY INC. DEL CL COM 084670702 2202 26325 SH Sole 26325 BHP BILLITON LTD COM 088606108 24 250 SH Sole 250 BOMBARDIER INC CL B COM 097751200 180 24600 SH Sole 24600 CANADIAN NATIONAL RAILROAD CO COM 136375102 903 12000 SH Sole 12000 CAPELLA EDUCATION COMPANY COM 139594105 10466 210194 SH Sole 210194 CAPITAL ONE FINANCIAL COM 14040H105 1604 30863 SH Sole 30863 CARMAX INC COM 143130102 607 18900 SH Sole 18900 CATERPILLAR INC COM 149123101 145 1300 SH Sole 1300 CELGENE CORP COM 151020104 57489 998504 SH Sole 998504 CERNER CORP COM 156782104 296 2666 SH Sole 2666 CHEVRON CORP COM 166764100 904 8414 SH Sole 8414 CHICAGO BRIDGE & IRON CO NV COM 167250109 435 10699 SH Sole 10699 CISCO SYSTEMS INC COM 17275R102 27627 1610899 SH Sole 1610899 COCA COLA CO COM 191216100 757 11417 SH Sole 11417 COGNIZANT TECH SOLUTIONS CORP COM 192446102 246 3017 SH Sole 3017 COLGATE-PALMOLIVE COM 194162103 388 4800 SH Sole 4800 COMCAST CORP - A COM 20030N101 360 14548 SH Sole 14548 COMCAST CORP - A - SPL COM 20030N200 2959 127442 SH Sole 127442 COMPOSITE TECH CORP COM 20461S108 0 1000 SH Sole 1000 CONOCOPHILLIPS COM COM 20825C104 262 3280 SH Sole 3280 CONSOLIDATED ENERGY INC COM 20854P109 3557 66321 SH Sole 66321 CORE LABORATORIES NV COM N22717107 39921 390728 SH Sole 390728 COSTCO WHOLESALE CRP DEL COM 22160K105 31 416 SH Sole 416 CROWN CASTLE INTL CORP COM 228227104 3998 93970 SH Sole 93970 CVS/CAREMARK CORP COM 126650100 26 750 SH Sole 750 DANAHER CORP COM 235851102 463 8916 SH Sole 8916 DEALERTRAK HOLDINGS, INC COM 242309102 47703 2081297 SH Sole 2081297 DEERE & CO COM 244199105 238 2460 SH Sole 2460 DENTSPLY INTL COM 249030107 3362 90876 SH Sole 90876 DONALDSON INC COM 257651109 4833 78850 SH Sole 78850 DUKE REALTY CORP COM 264411505 218 15550 SH Sole 15550 EAST WEST BANCORP INC COM 27579R104 727 33100 SH Sole 33100 EATON VANCE CP COM 278265103 14 434 SH Sole 434 ECOLAB INC COM 278865100 40029 784565 SH Sole 784565 ELI LILLY & CO COM 532457108 209 5950 SH Sole 5950 EMC CORP COM 268648102 1045 39363 SH Sole 39363 EMERSON COM 291011104 155 2656 SH Sole 2656 ENTERPRISE PRODUCTS PARTNERS L COM 293792107 390 9050 SH Sole 9050 EQT CORPORATION COM 26884L109 2104 42168 SH Sole 42168 EQUITY RESIDENTIAL PROPERTYS I COM 29476l107 466 8257 SH Sole 8257 EUROSEAS LTD COM Y23592200 60 12400 SH Sole 12400 EXPEDITORS INTERNATIONAL COM 302130109 113923 2271641 SH Sole 2271641 EXPRESS SCRIPTS INC COM 302182100 1105 19866 SH Sole 19866 EXXON MOBIL CORP COM 30231G102 1936 23009 SH Sole 23009 FASTENAL CO COM 311900104 224244 3458955 SH Sole 3458955 FISERV INC COM 337738108 3501 55813 SH Sole 55813 FMC TECHNOLOGIES INC. COM 30249U101 710 7512 SH Sole 7512 FORTINET INC COM 34959e109 1302 29500 SH Sole 29500 FOSTER WHEELER LTD COM H27178104 24 625 SH Sole 625 FREEPORT MCMORAN COPPER & GOLD COM 35671D857 665 11971 SH Sole 11971 GENERAL ELECTRIC COM 369604103 3445 171810 SH Sole 171810 GLACIER BANCORP COM 37637Q105 1057 70226 SH Sole 70226 GOLDMAN SACHS GROUP COM 38141G104 52 330 SH Sole 330 HCP INC COM 40414L109 5307 139882 SH Sole 139882 HEALTHCARE SERVICES GROUP INC COM 421906108 32401 1844099 SH Sole 1844099 HENRY SCHEIN INC. COM 806407102 53 758 SH Sole 758 HEWLETT-PACKARD COM 428236103 597 14582 SH Sole 14582 IDEXX LABORATORIES, INC. COM 45168D104 178478 2311295 SH Sole 2311295 II-VI INC COM 902104108 48389 972653 SH Sole 972653 ILLINOIS TOOL WORKS COM 452308109 30 550 SH Sole 550 INTEL CORP COM 458140100 33833 1676578 SH Sole 1676578 INTL BUSINESS MACH CORP COM 459200101 2819 17289 SH Sole 17289 IRON MOUNTAIN COM 462846106 50 1600 SH Sole 1600 J P MORGAN CHASE & CO COM 46625H100 301 6528 SH Sole 6528 JACOBS ENGINEERING CP INC COM 469814107 105865 2058420 SH Sole 2058420 JAMBA, INC. COM 47023A101 17 7700 SH Sole 7700 JOHNSON & JOHNSON COM 478160104 6991 117989 SH Sole 117989 JOHNSON CONTROLS INC COM 478366107 371 8916 SH Sole 8916 K12 INC COM 48273U102 38407 1139668 SH Sole 1139668 KINDER MORGAN MGT LLC COM 49455U100 537 8188 SH Sole 8188 KINROSS GOLD CORP COM 496902404 102 6500 SH Sole 6500 LABORATORY CORP OF AMERICA HOL COM 50540R409 8870 96274 SH Sole 96274 LANDSTAR SYSTEMS INC COM 515098101 4861 106411 SH Sole 106411 LEGG MASON INC COM 524901105 97 2676 SH Sole 2676 LINCOLN NATL CORP COM 534187109 202 6736 SH Sole 6736 LKQ CORP COM 501889208 50884 2111389 SH Sole 2111389 LYNAS CORP LTD COM Q5683J103 173 75000 SH Sole 75000 MAG SILVER CORP COM 55903Q104 10 800 SH Sole 800 MARKEL CORP COM 570535104 83183 200707 SH Sole 200707 MASTERCARD INC CL A COM 57636Q104 810 3219 SH Sole 3219 McCORMICK & CO COM 579780206 675 14110 SH Sole 14110 MERCK & CO COM 58933Y105 904 27383 SH Sole 27383 METROPCS COMMUNICATIONS, INC. COM 591708102 351 21600 SH Sole 21600 MHI HOSPITALITY CORP COM 55302L102 43 17125 SH Sole 17125 MICROSOFT CORP COM 594918104 4207 165709 SH Sole 165709 MIDDLEBY CORP COM 596278101 1246 13383 SH Sole 13383 MONSANTO CO COM 61166W101 17722 245257 SH Sole 245257 MOSIAC COMPANY COM 61945A107 16 200 SH Sole 200 MURPHY OIL CORP COM 626717102 323 4400 SH Sole 4400 NATIONAL AMERICAN UNIV HOLDING COM 63245Q105 9749 1374978 SH Sole 1374978 NATIONWIDE HEALTH PROPERTIES COM 638620104 2606 61283 SH Sole 61283 NEOGEN CORP COM 640491106 269 6500 SH Sole 6500 NESTLE S.A. COM 641069406 458 7974 SH Sole 7974 NEWMONT MINING CORP COM 651639106 184 3364 SH Sole 3364 NOKIA CORP ADR COM 654902204 82 9640 SH Sole 9640 NUANCE COMMUNICATIONS COM 67020Y100 227 11600 SH Sole 11600 PAYCHEX COM 704326107 7711 245677 SH Sole 245677 PEABODY ENERGY CORP COM 704549104 35 488 SH Sole 488 PEPSICO INC COM 713448108 310 4814 SH Sole 4814 PFIZER INC COM 717081103 1062 52299 SH Sole 52299 PHILIP MORRIS INTL COM 718172109 465 7090 SH Sole 7090 PINNACLE WEST CAPITOL CORP COM 723484101 231 5400 SH Sole 5400 PNC FINANCIAL SVCS INC COM 693475105 1902 30203 SH Sole 30203 POOL CORPORATION COM 73278L105 292 12102 SH Sole 12102 POTASH CORP OF SASKATCHEWAN COM 73755L107 62091 1053640 SH Sole 1053640 PRECISION CASTPARTS CORP COM 740189105 265 1800 SH Sole 1800 PROCTER & GAMBLE CO COM 742718109 22894 371662 SH Sole 371662 QUALCOMM INC COM 747525103 122655 2237003 SH Sole 2237003 QUANTA SERVICES INC COM 74762e102 54877 2446578 SH Sole 2446578 RANGE RESOURCES CORP COM 75281A109 38505 658649 SH Sole 658649 RENAISSANCE RE HOLDINGS LTD COM G7496G103 1310 18984 SH Sole 18984 RESMED INC COM 761152107 76888 2562925 SH Sole 2562925 RIO TINTO PLC COM 767204100 219 3080 SH Sole 3080 ROPER INDUSTRIES, INC COM 776696106 99663 1152708 SH Sole 1152708 SBA COMMUNICATIONS CORP COM 78388J106 1030 25970 SH Sole 25970 SCHLUMBERGER LTD COM 806857108 130860 1403177 SH Sole 1403177 STATE STREET CORPORATION COM 857477103 155 3458 SH Sole 3458 STERICYCLE INC COM 858912108 67777 764375 SH Sole 764375 STONEMOR PARTNERS LP COM 86183Q100 367 13000 SH Sole 13000 STRYKER CORP COM 863667101 4111 67611 SH Sole 67611 SUNCOR ENERGY INC COM 867224107 341 7609 SH Sole 7609 T ROWE PRICE GROUP INC COM 74144T108 100578 1514266 SH Sole 1514266 TECHNE CORP COM 878377100 54589 762529 SH Sole 762529 TELEFLEX INC COM 879369106 217 3750 SH Sole 3750 TEVA PHARMACEUTICAL ADR COM 881624209 71726 1429657 SH Sole 1429657 TEXAS INSTRUMENTS COM 882508104 11 308 SH Sole 308 TRANSOCEAN INC COM H8817H100 158 2031 SH Sole 2031 TRIMBLE NAVIGATION LTD COM 896239100 108532 2147447 SH Sole 2147447 U.S. BANCORP COM 902973304 928 35117 SH Sole 35117 ULTRA PETROLEUM CORP COM 903914109 103634 2104242 SH Sole 2104242 UNIT CORP COM 909218109 48130 776915 SH Sole 776915 UNITED TECHNOLOGIES CORP COM 913017109 374 4421 SH Sole 4421 VERIZON COMMUNICATIONS COM 92343V104 205 5309 SH Sole 5309 VISA INC COM 92826C839 49681 674828 SH Sole 674828 WALT DISNEY CO COM 254687106 374 8669 SH Sole 8669 WELLS FARGO & CO COM 949746101 633 19975 SH Sole 19975 WHOLE FOODS MARKET COM 966837106 521 7900 SH Sole 7900 WR BERKLEY CORP COM 084423102 5565 172767 SH Sole 172767 ENERPLUS RESOURCES FUND 29274D604 194 6117 SH Sole 6117 ISHARES INC MSCI TAIWAN INDEX 464286731 19 1300 SH Sole 1300 VANGUARD FTSE ALL-WORLD EX-US 922042775 328 6650 SH Sole 6650 ALPINE REALTY INCOME & GROWTH 020940862 176 10901 SH Sole 10901 ARTIO INTL EQUITY FUND II CL A 04315J845 306 24174 SH Sole 24174 BRADYWINE BLUE 10532B101 189 7047 SH Sole 7047 BUFFALO SCIENCE & TECH FD 119530103 175 10735 SH Sole 10735 DAVIS NY VENTURE FD CL A 239080104 761 21194 SH Sole 21194 DF DENT PREMIER GROWTH FUND 349903419 959 54494 SH Sole 54494 HARBOR FUND INTERNATIONAL FUND 411511306 895 14200 SH Sole 14200 MASTERS SELECT INTERNATIONAL 576417208 91 5690 SH Sole 5690 T ROWE PRICE INTNL FUND 77956H203 394 27094 SH Sole 27094 VANGUARD REIT FUND INDEX 921908703 243 12495 SH Sole 12495