The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
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COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
Amazon.com, Inc. Stock 023135106 66,914 20,068 SH   SOLE 0 20,068 0 0
Stericycle, Inc. Stock 858912108 276 4,635 SH   SOLE 0 4,635 0 0
Starbucks Corporation Stock 855244109 1,264 10,805 SH   SOLE 0 10,804 0 0
iShares Gold Trust ETF 464285204 1,225 35,187 SH   SOLE 0 35,187 0 0
Willis Towers Watson Plc Ltd Shs Stock G96629103 534 2,250 SH   SOLE 0 2,250 0 0
Johnson & Johnson Stock 478160104 7,547 44,114 SH   SOLE 0 44,114 0 0
Costco Wholesale Corporation Stock 22160K105 509 897 SH   SOLE 0 897 0 0
Cabot Corporation Stock 127055101 3,830 68,144 SH   SOLE 0 68,144 0 0
iShares MSCI Emerging Markets ETF ETF 464287234 2,353 48,175 SH   SOLE 0 48,175 0 0
Goldman Sachs Group, Inc. Stock 38141G104 272 710 SH   SOLE 0 710 0 0
Scotts Miracle-Gro Co. Stock 810186106 316 1,961 SH   SOLE 0 1,961 0 0
Boston Scientific Corporation Stock 101137107 460 10,821 SH   SOLE 0 10,821 0 0
Procter & Gamble Company Stock 742718109 5,087 31,096 SH   SOLE 0 31,096 0 0
Coca-Cola Company Stock 191216100 3,110 52,533 SH   SOLE 0 52,533 0 0
PowerShares DB Commodity Index Tracking Fund ETF 46138B103 1,681 80,900 SH   SOLE 0 80,900 0 0
Cabot Microelectronics Corporation Stock 12571T100 3,920 20,450 SH   SOLE 0 20,450 0 0
Boston Beer Inc Cl A Stock 100557107 455 900 SH   SOLE 0 900 0 0
CME Group Inc. Class A Stock 12572Q105 32,579 142,603 SH   SOLE 0 142,602 0 0
State Street Corporation Stock 857477103 539 5,800 SH   SOLE 0 5,800 0 0
Medtronic Plc Stock G5960L103 455 4,403 SH   SOLE 0 4,403 0 0
Fortive Corp. Stock 34959J108 34,823 456,451 SH   SOLE 0 456,451 0 0
Netflix, Inc. Stock 64110L106 31,543 52,359 SH   SOLE 0 52,359 0 0
Paychex, Inc. Stock 704326107 1,964 14,390 SH   SOLE 0 14,390 0 0
Integer Holdings Corporation Stock 45826H109 27,227 318,114 SH   SOLE 0 318,114 0 0
Pool Corporation Com Stock 73278L105 955 1,687 SH   SOLE 0 1,687 0 0
Estee Lauder Companies Inc. Class A Stock 518439104 458 1,238 SH   SOLE 0 1,238 0 0
Merck & Co., Inc. Stock 58933Y105 885 11,553 SH   SOLE 0 11,553 0 0
SPDR S&P 500 ETF Trust ETF 78462F103 7,115 14,980 SH   SOLE 0 14,979 0 0
Nordson Corp Com Stock 655663102 265 1,037 SH   SOLE 0 1,037 0 0
Diageo plc Sponsored ADR ADR 25243Q205 317 1,440 SH   SOLE 0 1,440 0 0
Vertex Pharmaceuticals Incorporated Stock 92532F100 532 2,423 SH   SOLE 0 2,423 0 0
Verizon Communications Inc. Stock 92343V104 665 12,806 SH   SOLE 0 12,806 0 0
Chubb Limited Stock H1467J104 393 2,032 SH   SOLE 0 2,032 0 0
FedEx Corporation Stock 31428X106 499 1,930 SH   SOLE 0 1,930 0 0
Sherwin-Williams Company Stock 824348106 46,901 133,180 SH   SOLE 0 133,179 0 0
Honeywell International Inc. Stock 438516106 2,944 14,120 SH   SOLE 0 14,119 0 0
Ingersoll-Rand Plc Stock G8994E103 273 1,350 SH   SOLE 0 1,350 0 0
U.S. Bancorp Stock 902973304 230 4,100 SH   SOLE 0 4,100 0 0
Xcel Energy Inc. Stock 98389B100 264 3,895 SH   SOLE 0 3,895 0 0
Home Depot, Inc. Stock 437076102 44,704 107,718 SH   SOLE 0 107,718 0 0
Baxter International Inc. Stock 071813109 423 4,930 SH   SOLE 0 4,930 0 0
Automatic Data Processing, Inc. Stock 053015103 3,315 13,443 SH   SOLE 0 13,443 0 0
Cooper Cos Inc Com New Stock 216648402 258 616 SH   SOLE 0 616 0 0
Broadridge Financial Solutions, Inc. Stock 11133T103 3,714 20,314 SH   SOLE 0 20,313 0 0
iShares Russell 1000 Growth ETF ETF 464287614 234 766 SH   SOLE 0 766 0 0
Steris Plc Stock G8473T100 3,743 15,378 SH   SOLE 0 15,377 0 0
Waste Connections, Inc. Stock 94106B101 42,143 309,261 SH   SOLE 0 309,261 0 0
Berkshire Hathaway Inc. Class B Stock 084670702 1,854 6,201 SH   SOLE 0 6,201 0 0
Adobe Systems Incorporated Stock 00724F101 1,304 2,299 SH   SOLE 0 2,299 0 0
Alphabet Inc. Class A Stock 02079K305 76,427 26,381 SH   SOLE 0 26,381 0 0
Fiserv Inc Com Stock 337738108 714 6,880 SH   SOLE 0 6,880 0 0
O'Reilly Automotive, Inc. Stock 67103H107 39,238 55,560 SH   SOLE 0 55,560 0 0
Constellation Brands, Inc. Class A Stock 21036P108 584 2,327 SH   SOLE 0 2,327 0 0
Comcast Corporation Class A Stock 20030N101 4,199 83,434 SH   SOLE 0 83,434 0 0
Ase Technology Hldg Co Ltd Sponsored Ads ADR 00215W100 130 16,618 SH   SOLE 0 16,618 0 0
Generac Holdings Inc. Stock 368736104 1,126 3,200 SH   SOLE 0 3,200 0 0
Microsoft Corporation Stock 594918104 66,561 197,911 SH   SOLE 0 197,910 0 0
CVS Health Corporation Stock 126650100 663 6,430 SH   SOLE 0 6,430 0 0
Ameriprise Financial, Inc. Stock 03076C106 359 1,190 SH   SOLE 0 1,190 0 0
Avery Dennison Corporation Stock 053611109 325 1,500 SH   SOLE 0 1,500 0 0
Berkshire Hathaway Inc. Class A Stock 084670108 3,605 8 SH   SOLE 0 8 0 0
Copart Inc Com Stock 217204106 257 1,698 SH   SOLE 0 1,698 0 0
Vanguard Small-Cap Index Fund ETF 922908751 1,017 4,500 SH   SOLE 0 4,500 0 0
Vanguard Mid-Cap Index Fund ETF 922908629 2,421 9,504 SH   SOLE 0 9,504 0 0
NextEra Energy, Inc. Stock 65339F101 788 8,439 SH   SOLE 0 8,439 0 0
NIKE, Inc. Class B Stock 654106103 201 1,207 SH   SOLE 0 1,207 0 0
Tesla Motors, Inc. Stock 88160R101 444 420 SH   SOLE 0 420 0 0
Msci Inc Com Stock 55354G100 316 515 SH   SOLE 0 515 0 0
Thor Industries, Inc. Stock 885160101 218 2,099 SH   SOLE 0 2,099 0 0
Amphenol Corporation Class A Stock 032095101 568 6,494 SH   SOLE 0 6,494 0 0
Alcon Inc Stock H01301128 223 2,557 SH   SOLE 0 2,557 0 0
Oncternal Therapeutics Inc Com Stock 68236P107 69 30,211 SH   SOLE 0 30,211 0 0
Booz Allen Hamilton Holding Corporation Class A Stock 099502106 32,540 383,772 SH   SOLE 0 383,772 0 0
Teradyne, Inc. Stock 880770102 338 2,069 SH   SOLE 0 2,069 0 0
Zogenix Inc Com New Stock 98978L204 264 16,250 SH   SOLE 0 16,250 0 0
Anterix Inc Com Stock 03676C100 583 9,930 SH   SOLE 0 9,930 0 0
Booking Holdings Inc. Stock 09857L108 25,868 10,782 SH   SOLE 0 10,782 0 0
Wabtec Corporation Stock 929740108 27,705 300,785 SH   SOLE 0 300,785 0 0
Leidos Holdings, Inc. Stock 525327102 30,010 337,571 SH   SOLE 0 337,571 0 0
Vanguard Russell 1000 Value Index Fund ETF 92206C714 1,612 21,858 SH   SOLE 0 21,858 0 0
Vanguard Total International Stock ETF ETF 921909768 709 11,159 SH   SOLE 0 11,159 0 0
Lear Corporation Stock 521865204 238 1,300 SH   SOLE 0 1,300 0 0
iShares Russell 2000 ETF ETF 464287655 1,139 5,119 SH   SOLE 0 5,119 0 0
Twilio Inc. Class A Stock 90138F102 16,436 62,414 SH   SOLE 0 62,414 0 0
Carrier Global Corporation Stock 14448C104 1,124 20,725 SH   SOLE 0 20,725 0 0
Sysco Corporation Stock 871829107 645 8,215 SH   SOLE 0 8,215 0 0
Warner Music Group Corp Stock 934550203 3,416 79,103 SH   SOLE 0 79,103 0 0
Ishares Floating Rate Bond Etf ETF 46429B655 5,088 100,300 SH   SOLE 0 100,300 0 0
II-VI Incorporated Stock 902104108 734 10,740 SH   SOLE 0 10,740 0 0
iShares Select Dividend ETF ETF 464287168 317 2,583 SH   SOLE 0 2,583 0 0
American Electric Power Company, Inc. Stock 025537101 359 4,032 SH   SOLE 0 4,031 0 0
Brown-Forman Corporation Class B Stock 115637209 3,598 49,389 SH   SOLE 0 49,389 0 0
Bentley Sys Inc Com Cl B Stock 08265T208 202 4,188 SH   SOLE 0 4,188 0 0
Eastern Bankshares Inc Com Stock 27627N105 908 45,000 SH   SOLE 0 45,000 0 0
TechTeam Global Inc. Stock G06242104 300 787 SH   SOLE 0 787 0 0
Xylem Inc. Stock 98419M100 372 3,100 SH   SOLE 0 3,100 0 0
Marriott Vacations Worldwide Corp. Stock 57164Y107 2,955 17,490 SH   SOLE 0 17,490 0 0
Cambridge Bancorp Com Stock 132152109 1,133 12,107 SH   SOLE 0 12,107 0 0
Neogen Corporation Stock 640491106 545 12,000 SH   SOLE 0 12,000 0 0
Visa Inc. Class A Stock 92826C839 57,086 263,422 SH   SOLE 0 263,421 0 0
Hershey Company Stock 427866108 1,175 6,075 SH   SOLE 0 6,075 0 0
iShares MSCI USA Minimum Volatility ETF ETF 46429B697 231 2,852 SH   SOLE 0 2,852 0 0
SVB Financial Group Stock 78486Q101 509 750 SH   SOLE 0 750 0 0
Vanguard Growth Index Fund ETF 922908736 3,143 9,795 SH   SOLE 0 9,794 0 0
Ads Tec Energy Plc Shs Stock G0085J117 137 15,000 SH   SOLE 0 15,000 0 0
American Tower Corporation REIT 03027X100 45,693 156,217 SH   SOLE 0 156,216 0 0
Zebra Technologies Corp Cl A Stock 989207105 445 748 SH   SOLE 0 748 0 0
Facebook, Inc. Class A Stock 30303M102 34,725 103,242 SH   SOLE 0 103,242 0 0
ASML Holding NV ADR ADR N07059210 271 340 SH   SOLE 0 340 0 0
Lpl Finl Hldgs Inc Com Stock 50212V100 945 5,905 SH   SOLE 0 5,905 0 0
Mondelez Intl Inc. Class A Stock 609207105 4,376 65,986 SH   SOLE 0 65,986 0 0
Broadcom Limited Stock 11135F101 6,337 9,523 SH   SOLE 0 9,522 0 0
UniFirst Corporation Stock 904708104 456 2,167 SH   SOLE 0 2,167 0 0
Martin Marietta Materials, Inc. Stock 573284106 319 725 SH   SOLE 0 725 0 0
iShares Core MSCI EAFE ETF ETF 46432F842 222 2,968 SH   SOLE 0 2,968 0 0
SL Green Realty Corp. REIT 78440X887 30,509 425,511 SH   SOLE 0 425,510 0 0
Accenture Plc Stock G1151C101 297 715 SH   SOLE 0 715 0 0
Equifax Inc. Stock 294429105 381 1,300 SH   SOLE 0 1,300 0 0
NICE Systems Ltd. Sponsored ADR ADR 653656108 2,186 7,200 SH   SOLE 0 7,200 0 0
NVIDIA Corporation Stock 67066G104 444 1,511 SH   SOLE 0 1,510 0 0
EOG Resources, Inc. Stock 26875P101 250 2,816 SH   SOLE 0 2,816 0 0
S&P Global Inc. Stock 78409V104 43,150 91,433 SH   SOLE 0 91,433 0 0
SPDR S&P Biotech ETF ETF 78464A870 204 1,820 SH   SOLE 0 1,820 0 0
Interactive Brokers Group Inc Com Cl A Stock 45841N107 220 2,772 SH   SOLE 0 2,772 0 0
iShares Core MSCI Emerging Markets ETF ETF 46434G103 409 6,825 SH   SOLE 0 6,825 0 0
Cabot Oil & Gas Corporation Stock 127097103 406 21,384 SH   SOLE 0 21,384 0 0
Lennox Intl Inc Com Stock 526107107 206 634 SH   SOLE 0 634 0 0
PTC Inc. Stock 69370C100 232 1,911 SH   SOLE 0 1,911 0 0
Taiwan Semiconductor Manufacturing Co., Ltd. Sponsored ADR ADR 874039100 538 4,468 SH   SOLE 0 4,468 0 0
Casella Waste Sys Inc Cl A Stock 147448104 326 3,815 SH   SOLE 0 3,815 0 0
Blackstone Group L.P. Stock 09260D107 62,749 484,963 SH   SOLE 0 484,963 0 0
ANSYS, Inc. Stock 03662Q105 634 1,580 SH   SOLE 0 1,580 0 0
Church & Dwight Co., Inc. Stock 171340102 3,995 38,975 SH   SOLE 0 38,975 0 0
Stryker Corporation Stock 863667101 496 1,855 SH   SOLE 0 1,855 0 0
General Dynamics Corporation Stock 369550108 334 1,600 SH   SOLE 0 1,600 0 0
Cullen/Frost Bankers, Inc. Stock 229899109 214 1,700 SH   SOLE 0 1,700 0 0
McDonald's Corporation Stock 580135101 426 1,590 SH   SOLE 0 1,590 0 0
AMETEK, Inc. Stock 031100100 491 3,340 SH   SOLE 0 3,340 0 0
Cisco Systems, Inc. Stock 17275R102 1,571 24,792 SH   SOLE 0 24,791 0 0
Autodesk, Inc. Stock 052769106 27,694 98,487 SH   SOLE 0 98,487 0 0
CDW Corp. Stock 12514G108 294 1,438 SH   SOLE 0 1,438 0 0
AT&T Inc. Stock 00206R102 352 14,303 SH   SOLE 0 14,303 0 0
Vanguard Intermediate Term Bond Index Fund ETF 921937819 2,723 31,080 SH   SOLE 0 31,080 0 0
RE/MAX Holdings, Inc. Stock 75524W108 21,793 714,757 SH   SOLE 0 714,756 0 0
Charter Communications, Inc. Class A Stock 16119P108 39,836 61,101 SH   SOLE 0 61,101 0 0
Gaming and Leisure Properties, Inc. REIT 36467J108 3,086 63,411 SH   SOLE 0 63,411 0 0
Ambev SA Sponsored ADR ADR 02319V103 38 13,745 SH   SOLE 0 13,745 0 0
iShares Core S&P 500 ETF ETF 464287200 8,736 18,316 SH   SOLE 0 18,315 0 0
Mettler-Toledo International Inc. Stock 592688105 1,965 1,158 SH   SOLE 0 1,158 0 0
Siteone Landscape Supply Inc Com Stock 82982L103 1,151 4,750 SH   SOLE 0 4,750 0 0
Union Pacific Corporation Stock 907818108 498 1,978 SH   SOLE 0 1,978 0 0
Ecolab Inc. Stock 278865100 229 975 SH   SOLE 0 975 0 0
Charles Riv Labs Intl Inc Com Stock 159864107 376 997 SH   SOLE 0 997 0 0
salesforce.com, inc. Stock 79466L302 36,016 141,724 SH   SOLE 0 141,724 0 0
IDEXX Laboratories, Inc. Stock 45168D104 1,328 2,017 SH   SOLE 0 2,017 0 0
Thermo Fisher Scientific Inc. Stock 883556102 46,676 69,954 SH   SOLE 0 69,954 0 0
Lockheed Martin Corporation Stock 539830109 2,645 7,443 SH   SOLE 0 7,443 0 0
JPMorgan Chase & Co. Stock 46625H100 5,018 31,690 SH   SOLE 0 31,690 0 0
Chevron Corporation Stock 166764100 639 5,447 SH   SOLE 0 5,447 0 0
Vanguard FTSE Developed Markets ETF ETF 921943858 2,158 42,273 SH   SOLE 0 42,272 0 0
Danaher Corporation Stock 235851102 3,900 11,855 SH   SOLE 0 11,855 0 0
TJX Companies, Inc. Stock 872540109 273 3,593 SH   SOLE 0 3,593 0 0
Wal-Mart Stores, Inc. Stock 931142103 1,035 7,154 SH   SOLE 0 7,154 0 0
Raytheon Technologies Corporation Stock 75513E101 1,248 14,496 SH   SOLE 0 14,496 0 0
Vanguard FTSE Emerging Markets ETF ETF 922042858 2,892 58,463 SH   SOLE 0 58,463 0 0
Texas Instruments Incorporated Stock 882508104 736 3,906 SH   SOLE 0 3,906 0 0
Target Corporation Stock 87612E106 596 2,577 SH   SOLE 0 2,577 0 0
Pfizer Inc. Stock 717081103 221 3,742 SH   SOLE 0 3,741 0 0
Morgan Stanley Stock 617446448 2,870 29,239 SH   SOLE 0 29,239 0 0
3M Company Stock 88579Y101 443 2,493 SH   SOLE 0 2,493 0 0
Caterpillar Inc. Stock 149123101 2,010 9,724 SH   SOLE 0 9,723 0 0
Alphabet Inc. Class C Stock 02079K107 6,939 2,398 SH   SOLE 0 2,398 0 0
American Express Company Stock 025816109 33,289 203,480 SH   SOLE 0 203,480 0 0
Amgen Inc. Stock 031162100 222 988 SH   SOLE 0 988 0 0
Applied Materials, Inc. Stock 038222105 3,890 24,721 SH   SOLE 0 24,720 0 0
Otis Worldwide Corporation Stock 68902V107 2,933 33,683 SH   SOLE 0 33,683 0 0
Analog Devices, Inc. Stock 032654105 456 2,596 SH   SOLE 0 2,595 0 0
Williams Companies, Inc. Stock 969457100 1,834 70,412 SH   SOLE 0 70,411 0 0
IHS Markit Ltd. Stock G47567105 2,195 16,512 SH   SOLE 0 16,512 0 0
Nexstar Media Group Inc Cl A Stock 65336K103 512 3,394 SH   SOLE 0 3,394 0 0
Vanguard Dividend Appreciation Index Fund ETF 921908844 810 4,715 SH   SOLE 0 4,715 0 0
HealthEquity Inc Stock 42226A107 17,177 388,275 SH   SOLE 0 388,275 0 0
IPG Photonics Corporation Stock 44980X109 689 4,000 SH   SOLE 0 4,000 0 0
C.H. Robinson Worldwide, Inc. Stock 12541W209 344 3,200 SH   SOLE 0 3,200 0 0
Vanguard Short-Term Bond Index Fund ETF 921937827 644 7,965 SH   SOLE 0 7,965 0 0
Murphy USA, Inc. Stock 626755102 768 3,855 SH   SOLE 0 3,855 0 0
Mks Instrs Inc Com Stock 55306N104 300 1,725 SH   SOLE 0 1,725 0 0
Philip Morris International Inc. Stock 718172109 2,135 22,473 SH   SOLE 0 22,472 0 0
PNC Financial Services Group, Inc. Stock 693475105 2,769 13,808 SH   SOLE 0 13,808 0 0
Bristol-Myers Squibb Company Stock 110122108 908 14,566 SH   SOLE 0 14,566 0 0
W R Berkley Corporation Com Stock 084423102 230 2,797 SH   SOLE 0 2,797 0 0
Altria Group, Inc. Stock 02209S103 694 14,647 SH   SOLE 0 14,647 0 0
American Water Works Company, Inc. Stock 030420103 40,605 215,000 SH   SOLE 0 214,999 0 0
Agilent Technologies, Inc. Stock 00846U101 350 2,195 SH   SOLE 0 2,195 0 0
Exxon Mobil Corporation Stock 30231G102 1,409 23,032 SH   SOLE 0 23,031 0 0
UnitedHealth Group Incorporated Stock 91324P102 45,956 91,520 SH   SOLE 0 91,520 0 0
Travelers Companies, Inc. Stock 89417E109 1,006 6,430 SH   SOLE 0 6,430 0 0
Lowe's Companies, Inc. Stock 548661107 293 1,133 SH   SOLE 0 1,133 0 0
PayPal Holdings Inc. Stock 70450Y103 43,712 231,793 SH   SOLE 0 231,793 0 0
Charles Schwab Corporation Stock 808513105 39,734 472,456 SH   SOLE 0 472,456 0 0
Crown Castle International Corp REIT 22822V101 205 980 SH   SOLE 0 980 0 0
BlackRock, Inc. Stock 09247X101 633 691 SH   SOLE 0 690 0 0
Apple Inc. Stock 037833100 74,041 416,968 SH   SOLE 0 416,968 0 0
Abbott Laboratories Stock 002824100 7,018 49,868 SH   SOLE 0 49,868 0 0
Walt Disney Company Stock 254687106 1,344 8,678 SH   SOLE 0 8,677 0 0
iShares Russell 1000 ETF ETF 464287622 205 775 SH   SOLE 0 775 0 0
iShares Russell 1000 Value ETF ETF 464287598 4,338 25,831 SH   SOLE 0 25,831 0 0