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
Estimated average burden
hours per response: 23.8
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
ABBOTT LABORATORIES COM 002824100 1,467 20,283 SH   SOLE   20,283 0 0
ABIOMED INC COM 003654100 21,682 66,705 SH   SOLE   66,705 0 0
AFFILIATED MANAGERS GROUP COM 008252108 11,299 115,961 SH   SOLE   115,961 0 0
AIR PRODUCTS & CHEM COM 009158106 485 3,030 SH   SOLE   3,030 0 0
ALLIANCE DATA SYS CORP COM 018581108 19,535 130,167 SH   SOLE   130,167 0 0
ALLIANT ENERGY CORP COM 018802108 1,061 25,114 SH   SOLE   25,114 0 0
AMAZONCOM INC COM 023135106 30,467 20,285 SH   SOLE   20,285 0 0
AMERICAN ELEC PWR CO COM 025537101 565 7,560 SH   SOLE   7,560 0 0
AMERICAN EXPRESS CO COM 025816109 565 5,928 SH   SOLE   5,928 0 0
AMGEN INC COM 031162100 1,978 10,162 SH   SOLE   10,162 0 0
ANTHEM INC COM 036752103 525 2,000 SH   SOLE   2,000 0 0
APPLE INC COM 037833100 26,158 165,827 SH   SOLE   165,827 0 0
ARCHER-DANIELS MIDLAND CO COM 039483102 283 6,910 SH   SOLE   6,910 0 0
AUTOMATIC DATA PROCESSING INC COM 053015103 1,062 8,103 SH   SOLE   8,103 0 0
BP PLC SPONSORED ADR ORDINARY 055622104 1,589 41,904 SH   SOLE   41,904 0 0
BALL CORP COM 058498106 221 4,800 SH   SOLE   4,800 0 0
BANK OF AMERICA CORP COM 060505104 358 14,517 SH   SOLE   14,517 0 0
BANK OF NEW YORK MELLON CORP COM 064058100 15,545 330,255 SH   SOLE   330,255 0 0
BAXTER INTL INC COM 071813109 352 5,355 SH   SOLE   5,355 0 0
BERKSHIRE HATHAWAY INC A COM CL A 084670108 306 1 SH   SOLE   1 0 0
BERKSHIRE HATHAWAY INC B COM CL B 084670702 10,511 51,480 SH   SOLE   51,480 0 0
BOEING CO COM 097023105 741 2,297 SH   SOLE   2,297 0 0
BRIGHT HORIZONS FAM SOLUTIONS INC COM CL A 109194100 218 1,960 SH   SOLE   1,960 0 0
BRISTOL MYERS SQUIBB COM 110122108 1,643 31,610 SH   SOLE   31,610 0 0
BURLINGTON STORES INC COM 122017106 19,838 121,954 SH   SOLE   121,954 0 0
CARVANA CO CL A COM CL A 146869102 15,175 463,940 SH   SOLE   463,940 0 0
CATERPILLAR INC COM 149123101 319 2,510 SH   SOLE   2,510 0 0
CELGENE CORP COM 151020104 248 3,875 SH   SOLE   3,875 0 0
CENTRAL SECURITIES CORPORATION COM 155123102 395 15,920 SH   SOLE   15,920 0 0
CHEVRON CORP COM 166764100 1,349 12,396 SH   SOLE   12,396 0 0
COCA COLA CO COM 191216100 1,827 38,594 SH   SOLE   38,594 0 0
COGNIZANT TECHNOLOGY SOLUTIONS CORP A COM CL A 192446102 667 10,514 SH   SOLE   10,514 0 0
COPART INC COM 217204106 1,281 26,800 SH   SOLE   26,800 0 0
CORNING INC COM 219350105 429 14,198 SH   SOLE   14,198 0 0
DTE ENERGY HOLDING CO COM 233331107 402 3,645 SH   SOLE   3,645 0 0
DANAHER CORP COM 235851102 337 3,267 SH   SOLE   3,267 0 0
DEERE & COMPANY COM 244199105 329 2,208 SH   SOLE   2,208 0 0
DEXCOM INC COM 252131107 23,149 193,230 SH   SOLE   193,230 0 0
DISNEY WALT CO COM 254687106 645 5,885 SH   SOLE   5,885 0 0
DYNAVAX TECHNOLOGIES COM 268158201 19,597 2,141,731 SH   SOLE   2,141,731 0 0
ECOLAB INC COM 278865100 1,887 12,806 SH   SOLE   12,806 0 0
EMERSON ELECTRIC CO COM 291011104 466 7,800 SH   SOLE   7,800 0 0
ENTERPRISE PRODUCTS PARTNERS LP COMMON UNIT 293792107 895 36,386 SH   SOLE   36,386 0 0
FAIR ISAAC CORP COM 303250104 25,114 134,300 SH   SOLE   134,300 0 0
FASTENAL CO COM 311900104 19,891 380,392 SH   SOLE   380,392 0 0
GENERAL ELECTRIC CO COM 369604103 903 119,284 SH   SOLE   119,284 0 0
GRAINGER W W INC COM 384802104 329 1,165 SH   SOLE   1,165 0 0
GRUBHUB INC COM 400110102 12,691 165,224 SH   SOLE   165,224 0 0
HALLIBURTON CO COM 406216101 204 7,663 SH   SOLE   7,663 0 0
HOME DEPOT INC COM 437076102 1,206 7,021 SH   SOLE   7,021 0 0
HONEYWELL INTERNATIONAL INC COM 438516106 1,022 7,732 SH   SOLE   7,732 0 0
ILLINOIS TOOL WORKS COM 452308109 3,726 29,413 SH   SOLE   29,413 0 0
ILLUMINA INC COM 452327109 840 2,802 SH   SOLE   2,802 0 0
INTEL CORP COM 458140100 1,584 33,757 SH   SOLE   33,757 0 0
INTL BUSINESS MACH COM 459200101 681 5,994 SH   SOLE   5,994 0 0
INTUIT COM COM 461202103 896 4,552 SH   SOLE   4,552 0 0
ISHARES INC MSCI EURZONE ETF 464286608 449 12,800 SH   SOLE   12,800 0 0
ISHARES INC CORE S&P500 ETF 464287200 3,858 15,332 SH   SOLE   15,332 0 0
ISHARES INC RUS 1000 GRW ETF 464287614 621 4,743 SH   SOLE   4,743 0 0
ISHARES INC RUS 2000 GRW ETF 464287648 657 3,909 SH   SOLE   3,909 0 0
ISHARES INC RUSSELL 2000 ETF 464287655 1,077 8,042 SH   SOLE   8,042 0 0
ISHARES INC S&P US PFD STK 464288687 208 6,090 SH   SOLE   6,090 0 0
JOHNSON & JOHNSON COM 478160104 8,298 64,300 SH   SOLE   64,300 0 0
KELLOGG CO COM 487836108 359 6,300 SH   SOLE   6,300 0 0
KIMBERLY CLARK CORP COM 494368103 667 5,855 SH   SOLE   5,855 0 0
THE ESTEE LAUDER COMPANIES INC CLASS A COM CL A 518439104 284 2,184 SH   SOLE   2,184 0 0
LILLY ELI &CO COM 532457108 2,739 23,669 SH   SOLE   23,669 0 0
LOCKHEED MARTIN CORP COM 539830109 479 1,831 SH   SOLE   1,831 0 0
LOWES COS INC COM 548661107 23,759 257,242 SH   SOLE   257,242 0 0
LULULEMON ATHLETICA INC COM 550021109 23,860 196,200 SH   SOLE   196,200 0 0
MAGELLAN MIDSTREAM PARTNERS LP COM 559080106 695 12,188 SH   SOLE   12,188 0 0
MARSH & MCLENNAN COMPANIES INC COM 571748102 574 7,200 SH   SOLE   7,200 0 0
MARRIOTT INTERNATIONAL INC COM CL A 571903202 502 4,620 SH   SOLE   4,620 0 0
MCDONALDS CORP COM 580135101 1,670 9,404 SH   SOLE   9,404 0 0
MICROSOFT CORP COM 594918104 8,979 88,402 SH   SOLE   88,402 0 0
MOODY S CORPORATION COM 615369105 5,166 36,891 SH   SOLE   36,891 0 0
MORNINGSTAR INC COM 617700109 16,906 153,919 SH   SOLE   153,919 0 0
NIKE INC CLASS B COM CL B 654106103 673 9,082 SH   SOLE   9,082 0 0
NORTHERN TR CORP COM 665859104 1,277 15,275 SH   SOLE   15,275 0 0
OGE ENERGY CORP COM 670837103 364 9,300 SH   SOLE   9,300 0 0
ONEOK INC COM 682680103 290 5,370 SH   SOLE   5,370 0 0
PACKAGING CORP AMER COM 695156109 537 6,434 SH   SOLE   6,434 0 0
PAYCHEX INC COM 704326107 2,116 32,485 SH   SOLE   32,485 0 0
PEPSICO INC COM 713448108 2,457 22,243 SH   SOLE   22,243 0 0
PFIZER INC COM 717081103 3,248 74,415 SH   SOLE   74,415 0 0
PHILIP MORRIS INTL INC COM 718172109 273 4,095 SH   SOLE   4,095 0 0
PHILLIPS 66 PARTNERS LP COMMON UNIT 718549207 391 9,280 SH   SOLE   9,280 0 0
PROCTER AND GAMBLE CO COM 742718109 2,493 27,121 SH   SOLE   27,121 0 0
PROGRESSIVE CORP OHIO COM 743315103 34,074 564,801 SH   SOLE   564,801 0 0
PROTO LABS INC COM 743713109 642 5,690 SH   SOLE   5,690 0 0
QUALCOMM INC COM 747525103 299 5,250 SH   SOLE   5,250 0 0
ROGERS COMMUNICATIONS INC COM CL B 775109200 258 5,041 SH   SOLE   5,041 0 0
ROYAL DUTCH SHELL PLC COM CL A 780259206 262 4,500 SH   SOLE   4,500 0 0
SCHWAB CHARLES CORP NEW COM 808513105 24,585 591,981 SH   SOLE   591,981 0 0
SNAP-ON INC COM 833034101 291 2,000 SH   SOLE   2,000 0 0
SOUTHERN CO COM 842587107 221 5,030 SH   SOLE   5,030 0 0
STARBUCKS CORP COM 855244109 1,242 19,280 SH   SOLE   19,280 0 0
STRYKER CORP COM 863667101 514 3,280 SH   SOLE   3,280 0 0
SYSCO CORP COM 871829107 306 4,876 SH   SOLE   4,876 0 0
TJX COMPANIES INC COM 872540109 242 5,400 SH   SOLE   5,400 0 0
TELEFLEX INC COM 879369106 905 3,500 SH   SOLE   3,500 0 0
TORONTO DOMINION BK ONT COM NEW COM 891160509 281 5,654 SH   SOLE   5,654 0 0
US BANCORP COM 902973304 230 5,043 SH   SOLE   5,043 0 0
UNILEVER NV ORDINARY NV SHARES 904784709 357 6,634 SH   SOLE   6,634 0 0
UNION PACIFIC CORP COM 907818108 466 3,370 SH   SOLE   3,370 0 0
UNITED PARCEL SVC INC CL B COM CL B 911312106 223 2,288 SH   SOLE   2,288 0 0
UNITED TECHNOLOGIES CORP COM 913017109 1,437 13,498 SH   SOLE   13,498 0 0
VANGUARD INTL EQUITY INDEX FTSE EUROPE ETF 922042874 979 20,130 SH   SOLE   20,130 0 0
VEEVA SYS INC CL A COM COM CL A 922475108 26,729 299,254 SH   SOLE   299,254 0 0
WAGEWORKS INC COM 930427109 7,343 270,357 SH   SOLE   270,357 0 0
WAL-MART STORES INC COM 931142103 301 3,232 SH   SOLE   3,232 0 0
WALGREENS BOOTS ALLIANCE INC COM 931427108 1,040 15,225 SH   SOLE   15,225 0 0
WATSCO INC COM 942622200 20,203 145,201 SH   SOLE   145,201 0 0
WELLS FARGO CO COM 949746101 691 14,988 SH   SOLE   14,988 0 0
WEYERHAEUSER CO COM COM 962166104 280 12,798 SH   SOLE   12,798 0 0
YUM BRANDS INC COM 988498101 321 3,488 SH   SOLE   3,488 0 0
ZEBRA TECHNOLOGIES CORP CL A COM CL A 989207105 5,172 32,483 SH   SOLE   32,483 0 0
INVESCO QQQ TR UNIT SER 1 46090E103 628 4,069 SH   SOLE   4,069 0 0
EVO PMTS INC CL A COM COM CL A 26927E104 247 10,000 SH   SOLE   10,000 0 0
EDWARDS LIFESCIENCES CORP COM 28176E108 32,081 209,446 SH   SOLE   209,446 0 0
ALPS ETF TR ALERIAN MLP ETF ALERIAN MLP 00162Q866 178 20,350 SH   SOLE   20,350 0 0
AT&T INC USD1 COM 00206R102 2,237 78,373 SH   SOLE   78,373 0 0
ABBVIE INC COM 00287Y109 2,510 27,221 SH   SOLE   27,221 0 0
ABERDEEN STD GOLD ETF TR PHYSCL SWISS GLD 00326A104 306 2,474 SH   SOLE   2,474 0 0
ACCELERATE DIAGNOSTICS INC COM 00430H102 4,878 424,190 SH   SOLE   424,190 0 0
ADOBE SYSTEMS INC COM 00724F101 635 2,805 SH   SOLE   2,805 0 0
ALBIREO PHARMA INC COM 01345P106 4,438 180,911 SH   SOLE   180,911 0 0
ALPHABET INC CAP STK CL C COM CL C 02079K107 1,319 1,274 SH   SOLE   1,274 0 0
ALPHABET INC CAP STK CL A COM CL A 02079K305 24,500 23,446 SH   SOLE   23,446 0 0
ALTRIA GROUP INC COM 02209S103 930 18,829 SH   SOLE   18,829 0 0
AMERICAN TOWER CORPORATION COM CL A 03027X100 1,005 6,356 SH   SOLE   6,356 0 0
BLACKLINE INC COM 09239B109 23,495 573,747 SH   SOLE   573,747 0 0
BOOKING HLDGS INC COM 09857L108 658 382 SH   SOLE   382 0 0
C.H. ROBINSON WORLDWIDE INC COM 12541W209 202 2,400 SH   SOLE   2,400 0 0
CME GROUP INC CL A COM CL A 12572Q105 1,151 6,121 SH   SOLE   6,121 0 0
CHIMERA INVT CORP COM 16934Q208 247 13,875 SH   SOLE   13,875 0 0
CISCO SYS INC COM 17275R102 1,874 43,258 SH   SOLE   43,258 0 0
COMCAST CORP NEW CL A COM CL A 20030N101 720 21,153 SH   SOLE   21,153 0 0
COSTCO WHOLESALE CORP COM 22160K105 28,842 141,582 SH   SOLE   141,582 0 0
COSTAR GROUP INC COM 22160N109 26,134 77,470 SH   SOLE   77,470 0 0
DNP SELECT INCOME COM 23325P104 106 10,215 SH   SOLE   10,215 0 0
DIREXION SHS ETF TR DLY FIN BULL 25459Y694 322 7,200 SH   SOLE   7,200 0 0
DOMINION ENERGY INC COM 25746U109 555 7,770 SH   SOLE   7,770 0 0
DOWDUPONT INC COM 26078J100 515 9,621 SH   SOLE   9,621 0 0
DUKE ENERGY CORP COM 26441C204 771 8,934 SH   SOLE   8,934 0 0
ENERGY TRANSFER EQUITY LP COMMON UNIT 29273V100 259 19,600 SH   SOLE   19,600 0 0
EQUINIX INC COM 29444U700 694 1,969 SH   SOLE   1,969 0 0
EVOLENT HEALTH INC CL A COM CL A 30050B101 30,349 1,521,256 SH   SOLE   1,521,256 0 0
EXELIXIS INC COM 30161Q104 14,598 742,137 SH   SOLE   742,137 0 0
EXXON MOBIL CORP COM 30231G102 6,563 96,243 SH   SOLE   96,243 0 0
FACEBOOK INC CL A COM CL A 30303M102 16,216 123,698 SH   SOLE   123,698 0 0
FOCUS FINANCIAL PARTNERS INC COM CL A 34417P100 5,963 226,467 SH   SOLE   226,467 0 0
FRANKLIN STREET PROPERTIES CORP COM 35471R106 331 53,193 SH   SOLE   53,193 0 0
GLOBAL PMTS INC COM 37940X102 4,186 40,585 SH   SOLE   40,585 0 0
IDEXX LABORATORIES INC COM 45168D104 20,354 109,418 SH   SOLE   109,418 0 0
INOGEN INC COM 45780L104 16,612 133,786 SH   SOLE   133,786 0 0
INTERCONTINENTAL EXCHANGE INC COM 45866F104 40,887 542,774 SH   SOLE   542,774 0 0
INTERDIGITAL INC COM 45867G101 365 5,500 SH   SOLE   5,500 0 0
INTUITIVE SURGICAL INC COM 46120E602 711 1,484 SH   SOLE   1,484 0 0
IRON MOUNTAIN INC NPV COM 46284V101 27,048 834,546 SH   SOLE   834,546 0 0
JPMORGAN CHASE & CO COM 46625H100 5,892 60,357 SH   SOLE   60,357 0 0
J2 GLOBAL INC COM 48123V102 23,053 332,275 SH   SOLE   332,275 0 0
MB FINANCIAL INC COM 55264U108 1,176 29,682 SH   SOLE   29,682 0 0
MPLX LP PARTNERSHIP UNITS COMMON UNIT 55336V100 481 15,869 SH   SOLE   15,869 0 0
MASTERCARD INC A COM CL A 57636Q104 6,208 32,905 SH   SOLE   32,905 0 0
MERCADOLIBRE INC COM 58733R102 1,414 4,830 SH   SOLE   4,830 0 0
MERCK & CO INC COM 58933Y105 1,414 18,511 SH   SOLE   18,511 0 0
NETFLIX COM COM 64110L106 8,638 32,273 SH   SOLE   32,273 0 0
NEXTERA ENERGY INC COM 65339F101 320 1,840 SH   SOLE   1,840 0 0
NOVARTIS A G SPONSORED ADR NAMENAKTIE 66987V109 253 2,952 SH   SOLE   2,952 0 0
NVIDIA CORP COM 67066G104 619 4,637 SH   SOLE   4,637 0 0
O'REILLY AUTOMOTIVE INC COM 67103H107 592 1,720 SH   SOLE   1,720 0 0
ORACLE CORP COM 68389X105 248 5,497 SH   SOLE   5,497 0 0
PAYPAL HLDGS INC COM 70450Y103 23,515 279,645 SH   SOLE   279,645 0 0
PHYSICIANS REALTY TRUST COM 71943U104 172 10,733 SH   SOLE   10,733 0 0
POOL CORP COM 73278L105 2,204 14,830 SH   SOLE   14,830 0 0
PREMIER INC CL A COM CL A 74051N102 15,129 405,066 SH   SOLE   405,066 0 0
PROGREEN US INC COM 74327M102 0 300,000 SH   SOLE   300,000 0 0
REALPAGE INC COM 75606N109 19,648 407,713 SH   SOLE   407,713 0 0
S&PGLOBAL INC COM COM 78409V104 625 3,680 SH   SOLE   3,680 0 0
SPDR S&P 500 ETF TRUST UNIT SER 1 S&P SPDR S&P 500 ETF TR 78462F103 1,473 5,892 SH   SOLE   5,892 0 0
SAGE THERAPEUTICS INC COM 78667J108 2,986 31,173 SH   SOLE   31,173 0 0
SALESFORCE COM COM 79466L302 27,862 203,417 SH   SOLE   203,417 0 0
SPROTT PHYSICAL GOLD TRUST UNIT UNIT 85207H104 2,072 201,008 SH   SOLE   201,008 0 0
SPROTT PHYSICAL GOLD & SILVER TR UNIT TR UNIT 85208R101 1,297 103,430 SH   SOLE   103,430 0 0
TELADOC INC COM 87918A105 1,249 25,200 SH   SOLE   25,200 0 0
TELUS CORP COM 87971M103 241 7,260 SH   SOLE   7,260 0 0
3M CO COM 88579Y101 1,571 8,247 SH   SOLE   8,247 0 0
ULTIMATE SOFTWARE GROUP INC COM 90385D107 24,347 99,430 SH   SOLE   99,430 0 0
VANGUARD SCOTTSDALE FDS SHRT TERM CORP BD 92206C409 681 8,740 SH   SOLE   8,740 0 0
VENTAS INC COM 92276F100 410 6,995 SH   SOLE   6,995 0 0
VERIZON COMMUNICATIONS COM 92343V104 2,122 37,746 SH   SOLE   37,746 0 0
VISA INC CL A COM CL A 92826C839 43,352 328,575 SH   SOLE   328,575 0 0
WEC ENERGY GROUP INC COM 92939U106 672 9,699 SH   SOLE   9,699 0 0
WASTE MANAGEMENT INC COM 94106L109 616 6,919 SH   SOLE   6,919 0 0
WORKDAY INC COM CL A 98138H101 33,044 206,939 SH   SOLE   206,939 0 0
ZOETIS INC COM 98978V103 27,042 316,132 SH   SOLE   316,132 0 0
ALLERGAN PLC. COM COM G0177J108 458 3,430 SH   SOLE   3,430 0 0
AON PLC COM G0408V102 541 3,721 SH   SOLE   3,721 0 0
BROOKFIELD INFRASTRUCTURE PARTNERS LP COM G16252101 209 6,048 SH   SOLE   6,048 0 0
IHS MARKIT LTD A COM G47567105 506 10,544 SH   SOLE   10,544 0 0
LINDE PLC COM G5494J103 205 1,316 SH   SOLE   1,316 0 0
KORNIT DIGITAL LTD ORDINARY M6372Q113 22,274 1,189,831 SH   SOLE   1,189,831 0 0
WRIGHT MED GROUP N V ORD SHS 0.03 PAR COM N96617118 20,101 738,446 SH   SOLE   738,446 0 0