3m Co COM 88579Y101 1577 6701 SH SOLE NONE 0 0 6701 Abbott Labs COM 002824100 1263 22133 SH SOLE NONE 0 0 22133 Abbvie Inc COM 00287Y109 1589 16430 SH SOLE NONE 0 0 16430 Align Technology, Inc. COM 016255101 2814 12665 SH SOLE NONE 4470 0 8195 Alphabet Cl A CAP STK CL A 02079K305 2740 2601 SH SOLE NONE 365 0 2236 Alphabet Cl C CAP STK CL C 02079K107 3112 2974 SH SOLE NONE 1059 0 1915 Altria Group Inc COM 02209S103 1560 21852 SH SOLE NONE 0 0 21852 Amazon.Com COM 023135106 3566 3049 SH SOLE NONE 1127 0 1922 American Tower Corp COM 03027X100 4933 34577 SH SOLE NONE 10031 0 24546 American Water Works COM 030420103 2475 27050 SH SOLE NONE 7580 0 19470 Ametek Inc COM 031100100 2535 34975 SH SOLE NONE 13255 0 21720 Amgen Inc COM 031162100 685 3939 SH SOLE NONE 0 0 3939 Apple Computer Inc COM 037833100 2414 14262 SH SOLE NONE 238 0 14024 At&t Corp Com New COM 00206R102 541 13905 SH SOLE NONE 0 0 13905 Bank Of Amer Corp COM 060505104 57 1946 SH SOLE NONE 0 0 1946 Berkshire Hathaway Class A CL A 084670108 298 1 SH SOLE NONE 0 0 1 Berkshire Hathaway Class B New CL B NEW 084670702 938 4731 SH SOLE NONE 0 0 4731 Blackrock Inc. COM 09247X101 3849 7493 SH SOLE NONE 2745 0 4748 Blackstone Group LP COM UNIT LTD 09253U108 268 8371 SH SOLE NONE 1449 0 6922 Bristol Myers Squibb Co COM 110122108 444 7245 SH SOLE NONE 0 0 7245 CME Group COM CL A 12572Q105 3919 26834 SH SOLE NONE 9794 0 17040 Celgene Corporation COM 151020104 573 5493 SH SOLE NONE 0 0 5493 Chevron Texaco Corp COM 166764100 416 3326 SH SOLE NONE 0 0 3326 Cisco Systems Inc COM 17275R102 230 5999 SH SOLE NONE 2496 0 3503 Coca Cola Co COM 191216100 221 4810 SH SOLE NONE 987 0 3823 Colgate Palmolive COM 194162103 151 2000 SH SOLE NONE 800 0 1200 Comcast Corp New Cl A CL A 20030N101 361 9006 SH SOLE NONE 0 0 9006 Concho Resources Inc COM 20605P101 2263 15064 SH SOLE NONE 5513 0 9551 Danaher Corp COM 235851102 3795 40886 SH SOLE NONE 13041 0 27845 Disney Walt Co Holding Co COM DISNEY 254687106 329 3057 SH SOLE NONE 0 0 3057 Ecolab Inc. COM 278865100 3081 22963 SH SOLE NONE 7494 0 15469 Emerson Electric Co COM 291011104 341 4892 SH SOLE NONE 0 0 4892 Exxon Mobil Corp COM 30231G102 1432 17126 SH SOLE NONE 1200 0 15926 Facebook CL A 30303M102 5543 31415 SH SOLE NONE 10498 0 20917 First Republic Bank San Franci COM 33616C100 3787 43713 SH SOLE NONE 14470 0 29243 Fiserv Inc Wis COM 337738108 1992 15192 SH SOLE NONE 5761 0 9431 General Mills COM 370334104 318 5363 SH SOLE NONE 0 0 5363 Genl Electric Co COM 369604103 479 27470 SH SOLE NONE 0 0 27470 Genuine Parts Co COM 372460105 366 3854 SH SOLE NONE 0 0 3854 Goldman Sachs Group Inc COM 38141G104 147 578 SH SOLE NONE 100 0 478 Halliburton Co COM 406216101 105 2156 SH SOLE NONE 0 0 2156 Home Depot Inc COM 437076102 1523 8037 SH SOLE NONE 0 0 8037 Idexx Laboratories Inc COM 45168D104 2815 17999 SH SOLE NONE 5989 0 12010 Illumina Inc COM 452327109 2528 11569 SH SOLE NONE 4429 0 7140 Intel Corp COM 458140100 233 5040 SH SOLE NONE 0 0 5040 Intl Business Mach COM 459200101 230 1500 SH SOLE NONE 0 0 1500 JP Morgan Chase COM 46625H100 8751 81829 SH SOLE NONE 10829 0 71000 Johnson & Johnson Com COM 478160104 3318 23745 SH SOLE NONE 7785 0 15960 Markel COM 570535104 1790 1571 SH SOLE NONE 427 0 1144 Mastercard Inc. CL A 57636Q104 5417 35792 SH SOLE NONE 10485 0 25307 Medtronic Inc SHS G5960L103 378 4682 SH SOLE NONE 0 0 4682 Merck & Co Inc New Com COM 58933Y105 781 13888 SH SOLE NONE 0 0 13888 Microsoft Corp Com COM 594918104 1136 13283 SH SOLE NONE 3312 0 9971 Morgan Stanley COM NEW 617446448 69 1320 SH SOLE NONE 0 0 1320 Netflix, Inc COM 64110L106 3188 16609 SH SOLE NONE 5295 0 11314 Nike Inc CL B 654106103 421 6730 SH SOLE NONE 0 0 6730 Novartis Ag Spon Adr SPONSORED ADR 66987V109 196 2339 SH SOLE NONE 0 0 2339 Novo Nordisk A/S ADR ADR 670100205 1816 33833 SH SOLE NONE 13750 0 20083 Pepsico Inc COM 713448108 340 2837 SH SOLE NONE 0 0 2837 Pfizer Inc Com COM 717081103 827 22827 SH SOLE NONE 890 0 21937 Philip Morris International COM 718172109 1624 15373 SH SOLE NONE 444 0 14929 Pnc Financial Services Group I COM 693475105 278 1928 SH SOLE NONE 0 0 1928 Price T Rowe Group Inc. COM 74144T108 457 4356 SH SOLE NONE 0 0 4356 Priceline COM NEW 741503403 2212 1273 SH SOLE NONE 372 0 901 Procter & Gamble Co COM 742718109 1488 16198 SH SOLE NONE 827 0 15371 Roper Technologies COM 776696106 4472 17266 SH SOLE NONE 5587 0 11679 Royal Dutch Shell Class A SPONS ADR A 780259206 1973 29582 SH SOLE NONE 0 0 29582 Target Corp COM 87612E106 115 1770 SH SOLE NONE 0 0 1770 Teleflex Incorporated COM 879369106 1626 6533 SH SOLE NONE 2250 0 4283 Teradyne COM 880770102 1656 39560 SH SOLE NONE 15135 0 24425 Unilever Plc SPON ADR NEW 904767704 488 8814 SH SOLE NONE 0 0 8814 United Technologies Corp COM 913017109 395 3100 SH SOLE NONE 0 0 3100 V. F. Corporation COM 918204108 770 10407 SH SOLE NONE 40 0 10367 Vantiv Inc CL A 92210H105 1808 24581 SH SOLE NONE 9516 0 15065 Verizon Communications COM 92343V104 643 12154 SH SOLE NONE 0 0 12154 Visa Inc. COM CL A 92826C839 2643 23183 SH SOLE NONE 5402 0 17781 Wells Fargo & Co New COM 949746101 2736 45095 SH SOLE NONE 13965 0 31130 West Pharmaceuticals Services COM 955306105 1021 10350 SH SOLE NONE 3965 0 6385 XYLEM Inc. COM 98419M100 1141 16735 SH SOLE NONE 6010 0 10725 Zayo Group Holdings Inc. COM 98919V105 1701 46230 SH SOLE NONE 13600 0 32630