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
2U, Inc. COM 90214J101 59,882 1,768,507 SH   SOLE   1,269,128 0 499,379
3M Company COM 88579Y101 958 5,981 SH   SOLE   5,981 0 0
A. O. Smith Corporation COM 831865209 54,968 1,041,068 SH   SOLE   702,012 0 339,056
Abbott Laboratories COM 002824100 1,713 15,744 SH   SOLE   15,744 0 0
Alarm.com Holdings, Inc. COM 011642105 92,903 1,681,501 SH   SOLE   1,169,129 0 512,372
Align Technology, Inc. COM 016255101 43,878 134,035 SH   SOLE   76,117 0 57,918
Alphabet, Inc. Class A COM 02079K305 33,845 23,093 SH   SOLE   17,824 0 5,269
Alphabet, Inc. Class C COM 02079K107 24,858 16,915 SH   SOLE   16,524 0 391
Amazon.com, Inc. COM 023135106 111,789 35,503 SH   SOLE   30,445 0 5,058
AMCOR PLC ORD COM G0250X107 169 15,300 SH   SOLE   15,300 0 0
Amedisys, Inc. COM 023436108 164,069 693,943 SH   SOLE   515,562 0 178,381
American Express Company COM 025816109 356 3,550 SH   SOLE   3,550 0 0
AMN Healthcare Services, Inc. COM 001744101 82,715 1,414,895 SH   SOLE   943,913 0 470,982
Analog Devices, Inc. COM 032654105 61,907 530,297 SH   SOLE   485,119 0 45,178
Ansys, Inc. COM 03662Q105 154,346 471,676 SH   SOLE   358,632 0 113,044
Apple Inc. COM 037833100 7,944 68,592 SH   SOLE   32,392 0 36,200
Aspen Technology, Inc. COM 045327103 24,095 190,335 SH   SOLE   119,477 0 70,858
ASSOCIATED BANC CORP COM COM 045487105 1,200 95,100 SH   SOLE   95,100 0 0
Avalara, Inc. COM 05338G106 29,665 232,960 SH   SOLE   148,252 0 84,708
Berkshire Hathaway Inc. Class COM 084670702 707 3,320 SH   SOLE   2,845 0 475
Bio-Techne Corporation COM 09073M104 99,216 400,502 SH   SOLE   261,356 0 139,146
BlackLine, Inc. COM 09239B109 171,220 1,910,297 SH   SOLE   1,453,576 0 456,721
Bristol-Myers Squibb Company COM 110122108 351 5,825 SH   SOLE   5,825 0 0
Cabot Corporation COM 127055101 403 11,188 SH   SOLE   0 0 11,188
Calavo Growers, Inc. COM 128246105 20,805 313,943 SH   SOLE   234,470 0 79,473
Cass Information Systems, Inc. COM 14808P109 12,824 318,676 SH   SOLE   238,476 0 80,200
Chemed Corporation COM 16359R103 167,617 348,948 SH   SOLE   250,636 0 98,312
Cisco Systems, Inc. COM 17275R102 3,335 84,674 SH   SOLE   84,674 0 0
CMC Materials, Inc. COM 12571t100 22,851 160,013 SH   SOLE   127,982 0 32,031
Coca-Cola Company COM 191216100 363 7,348 SH   SOLE   7,348 0 0
Cognex Corporation COM 192422103 32,717 502,568 SH   SOLE   282,899 0 219,669
Colgate-Palmolive Company COM 194162103 365 4,730 SH   SOLE   4,730 0 0
CoStar Group, Inc. COM 22160N109 193,591 228,155 SH   SOLE   180,347 0 47,808
Costco Wholesale Corporation COM 22160K105 304 857 SH   SOLE   857 0 0
Danaher Corporation COM 235851102 70,948 329,486 SH   SOLE   299,884 0 29,602
Descartes Systems Group Inc. COM 249906108 36,187 635,090 SH   SOLE   466,998 0 168,092
Dorman Products, Inc. COM 258278100 21,819 241,410 SH   SOLE   179,929 0 61,481
Ecolab, Inc. COM 278865100 73,634 368,465 SH   SOLE   336,984 0 31,481
Ensign Group Inc. COM 29358P101 35,167 616,311 SH   SOLE   452,023 0 164,288
Equifax, Inc. COM 294429105 3,712 23,660 SH   SOLE   23,660 0 0
Evolent Health, Inc. Class A COM 30050B101 268 21,609 SH   SOLE   21,495 0 114
ExlService Holdings, Inc. COM 302081104 22,342 338,669 SH   SOLE   252,638 0 86,031
Exponent, Inc. COM 30214u102 67,406 935,805 SH   SOLE   621,035 0 314,770
Facebook, Inc. Class A COM 30303M102 216 824 SH   SOLE   624 0 200
Fastenal Company COM 311900104 149,918 3,324,854 SH   SOLE   2,500,065 0 824,789
Fiserv, Inc. COM 337738108 2,023 19,628 SH   SOLE   19,412 0 216
Five Below, Inc. COM 33829M101 204,443 1,609,789 SH   SOLE   1,184,159 0 425,630
Five9, Inc. COM 338307101 65,196 502,745 SH   SOLE   371,845 0 130,900
Floor & Decor Holdings, Inc. C COM 339750101 53,072 709,522 SH   SOLE   530,717 0 178,805
Freshpet, Inc. COM 358039105 51,434 460,670 SH   SOLE   344,191 0 116,479
Gentex Corporation COM 371901109 95,214 3,697,628 SH   SOLE   2,802,578 0 895,050
Globant S.A. COM L44385109 256,206 1,429,559 SH   SOLE   1,095,958 0 333,601
GoDaddy, Inc. Class A COM 380237107 47,937 630,999 SH   SOLE   355,340 0 275,659
Goosehead Insurance, Inc. COM 38267D109 20,113 232,280 SH   SOLE   173,088 0 59,192
Grand Canyon Education, Inc. COM 38526M106 144,300 1,805,099 SH   SOLE   1,338,243 0 466,856
Guidewire Software, Inc. COM 40171V100 52,619 504,646 SH   SOLE   393,795 0 110,851
Health Catalyst, Inc. COM 42225T107 36,077 985,702 SH   SOLE   740,917 0 244,785
Healthcare Services Group, Inc COM 421906108 105,205 4,886,457 SH   SOLE   3,724,017 0 1,162,440
HEICO Corporation COM 422806109 122,532 1,170,758 SH   SOLE   879,250 0 291,508
Heska Corporation COM 42805e306 26,915 272,448 SH   SOLE   204,212 0 68,236
Honeywell International Inc. COM 438516106 329 2,000 SH   SOLE   2,000 0 0
IAC / InterActiveCorp. COM 44891N109 65,506 546,888 SH   SOLE   409,407 0 137,481
IDEXX Laboratories, Inc. COM 45168D104 50,255 127,839 SH   SOLE   116,184 0 11,655
IHS Markit Ltd. COM G47567105 63,225 805,305 SH   SOLE   738,282 0 67,023
Illumina, Inc. COM 452327109 324 1,049 SH   SOLE   1,049 0 0
Inogen, Inc. COM 45780L104 7,364 253,931 SH   SOLE   190,968 0 62,963
Inovalon Holdings, Inc. Class COM 45781D101 38,707 1,463,410 SH   SOLE   1,094,240 0 369,170
Intel Corporation COM 458140100 2,360 45,583 SH   SOLE   45,583 0 0
International Flavors & Fragra COM 459506101 2,068 16,890 SH   SOLE   16,863 0 27
Ishares Core S&P 500 Etf COM 464287200 810 2,409 SH   SOLE   2,409 0 0
iShares Core S&P U.S. Growth E COM 464287671 610 7,626 SH   SOLE   1,391 0 6,235
Ishares Tr Russell 1000 COM 464287622 626 3,347 SH   SOLE   3,347 0 0
Ishares Tr Russell 2000 COM 464287655 499 3,332 SH   SOLE   3,332 0 0
Ishares Tr Russell 2000 Growth COM 464287648 649 2,930 SH   SOLE   0 0 2,930
Jack Henry & Associates, Inc. COM 426281101 65,697 404,067 SH   SOLE   317,874 0 86,193
Johnson & Johnson COM 478160104 3,189 21,422 SH   SOLE   20,876 0 546
JPMorgan Chase & Co. COM 46625H100 611 6,346 SH   SOLE   6,346 0 0
Kadant Inc. COM 48282T104 22,902 208,922 SH   SOLE   156,014 0 52,908
Kornit Digital Ltd. COM m6372q113 89,480 1,379,378 SH   SOLE   899,093 0 480,285
Lennox International, Inc. COM 526107107 27,877 102,261 SH   SOLE   56,621 0 45,640
Linde Plc COM G5494J103 38,480 161,592 SH   SOLE   149,738 0 11,854
MAXIMUS, Inc. COM 577933104 30,163 440,909 SH   SOLE   329,039 0 111,870
McDonald's Corporation COM 580135101 645 2,940 SH   SOLE   2,940 0 0
Medtronic plc COM G5960L103 627 6,029 SH   SOLE   4,903 0 1,126
Microsoft Corporation COM 594918104 155,093 737,378 SH   SOLE   675,178 0 62,200
Middleby Corporation COM 596278101 16,063 179,056 SH   SOLE   98,839 0 80,217
National Instruments Corporati COM 636518102 96,515 2,703,499 SH   SOLE   2,028,962 0 674,537
National Vision Holdings, Inc. COM 63845R107 35,416 926,155 SH   SOLE   693,191 0 232,964
Neogen Corporation COM 640491106 101,366 1,295,409 SH   SOLE   910,078 0 385,331
Netflix Inc. COM 64110L106 37,578 75,151 SH   SOLE   66,879 0 8,272
NVIDIA Corporation COM 67066G104 55,777 103,058 SH   SOLE   91,750 0 11,308
Ollie's Bargain Outlet Holding COM 681116109 88,100 1,008,589 SH   SOLE   660,650 0 347,939
Oracle Corporation COM 68389X105 300 5,020 SH   SOLE   5,020 0 0
OrthoPediatrics Corp. COM 68752l100 45,398 988,623 SH   SOLE   646,059 0 342,564
Paychex, Inc. COM 704326107 2,095 26,264 SH   SOLE   26,264 0 0
Paycom Software, Inc. COM 70432V102 122,296 392,855 SH   SOLE   310,928 0 81,927
Paylocity Holding Corp. COM 70438V106 86,337 534,860 SH   SOLE   377,277 0 157,583
Pegasystems, Inc. COM 705573103 148,218 1,224,535 SH   SOLE   846,170 0 378,365
Pennant Group, Inc. COM 70805E109 22,371 580,156 SH   SOLE   436,318 0 143,838
PepsiCo, Inc. COM 713448108 3,953 28,522 SH   SOLE   27,742 0 780
PetIQ, Inc. Class A COM 71639T106 21,514 653,530 SH   SOLE   489,322 0 164,208
Pluralsight, Inc. Class A COM 72941B106 78,947 4,608,718 SH   SOLE   3,428,257 0 1,180,461
Power Integrations, Inc. COM 739276103 33,553 605,644 SH   SOLE   452,309 0 153,335
PRA Group, Inc. COM 69354N106 54,119 1,354,658 SH   SOLE   911,352 0 443,306
Procter & Gamble Company COM 742718109 2,466 17,739 SH   SOLE   17,739 0 0
Pros Holdings, Inc. COM 74346Y103 44,194 1,383,650 SH   SOLE   945,431 0 438,219
Proto Labs, Inc. COM 743713109 201,185 1,553,555 SH   SOLE   1,133,051 0 420,504
Reckitt Benckiser Group ADR COM 756255204 1,789 91,546 SH   SOLE   91,546 0 0
Ritchie Bros. Auctioneers, Inc COM 767744105 211,251 3,565,424 SH   SOLE   2,748,331 0 817,093
Roche Holding Ltd. ADR COM 771195104 28,983 675,936 SH   SOLE   617,551 0 58,385
Rockwell Automation Com COM 773903109 2,448 11,091 SH   SOLE   11,091 0 0
Rogers Corporation COM 775133101 17,535 178,814 SH   SOLE   135,279 0 43,535
Rollins, Inc. COM 775711104 124,873 2,304,347 SH   SOLE   1,741,301 0 563,046
Salesforce.com, Inc. COM 79466L302 96,348 383,368 SH   SOLE   346,320 0 37,048
ServiceMaster Global Holdings, COM 81761R109 33,839 848,530 SH   SOLE   634,848 0 213,682
ServiceNow, Inc. COM 81762P102 58,039 119,669 SH   SOLE   109,233 0 10,436
Snap-on, Inc. COM 833034101 2,073 14,087 SH   SOLE   14,087 0 0
SPDR SERIES TRUST BLMBRG BRC C COM 78464A359 344 5,000 SH   SOLE   5,000 0 0
SPS Commerce, Inc. COM 78463M107 67,955 872,667 SH   SOLE   644,922 0 227,745
Starbucks Corporation COM 855244109 67,935 790,676 SH   SOLE   729,078 0 61,598
Stryker Corp Com COM 863667101 396 1,900 SH   SOLE   1,900 0 0
Target Corporation COM 87612E106 366 2,327 SH   SOLE   2,327 0 0
Teladoc Health, Inc. COM 87918A105 120,048 547,566 SH   SOLE   400,336 0 147,230
Tesla Motors Inc. COM 88160R101 759 1,770 SH   SOLE   1,570 0 200
TJX Companies, Inc. COM 872540109 2,940 52,835 SH   SOLE   52,835 0 0
Trupanion, Inc. COM 898202106 399 5,053 SH   SOLE   5,053 0 0
Tyler Technologies, Inc. COM 902252105 152,555 437,672 SH   SOLE   347,135 0 90,537
U.S. Bancorp COM 902973304 310 8,637 SH   SOLE   8,637 0 0
U.S. Physical Therapy, Inc. COM 90337L108 30,259 348,289 SH   SOLE   260,377 0 87,912
UnitedHealth Group, Inc. COM 91324P102 58,965 189,130 SH   SOLE   173,702 0 15,428
Vanguard Index Fds Stk Mrk Etf COM 922908769 277 1,624 SH   SOLE   1,624 0 0
Veeva Systems, Inc. Class A COM 922475108 102,951 366,126 SH   SOLE   335,050 0 31,076
Verisk Analytics, Inc. COM 92345Y106 170,103 917,940 SH   SOLE   623,863 0 294,077
Visa, Inc. COM 92826C839 41,673 208,395 SH   SOLE   187,394 0 21,001
Walmart, Inc. COM 931142103 2,720 19,444 SH   SOLE   19,444 0 0
Walt Disney Company COM 254687106 450 3,628 SH   SOLE   3,628 0 0
Waste Mgmt COM 94106L109 283 2,500 SH   SOLE   2,500 0 0
Watsco, Inc. COM 942622200 35,728 153,413 SH   SOLE   80,777 0 72,636
West Pharmaceutical Services, COM 955306105 161,702 588,220 SH   SOLE   399,944 0 188,276
WillScot Mobile Mini Holdings COM 971378104 45,615 2,734,716 SH   SOLE   2,054,063 0 680,653
Workiva, Inc. Class A COM 98139A105 85,776 1,538,299 SH   SOLE   1,013,458 0 524,841
Xcel Energy Inc Com COM 98389B100 263 3,810 SH   SOLE   2,610 0 1,200
Fidelity 500 Index Fund Inst COM 315911750 1,485 12,681 SH   SOLE   10,864 0 1,818
Fidelity Contra Fund COM 316071109 266 15,922 SH   SOLE   15,922 0 0
Growth Fd Amer Inc Com COM 399874106 451 7,424 SH   SOLE   7,424 0 0
JPMORGAN TR II LARGE CAP GR A COM 4812C0506 480 8,585 SH   SOLE   8,585 0 0
Riverbridge Growth Fund - Inst COM 46141P404 17,185 604,053 SH   SOLE   604,053 0 0
Vanguard Index Tr 500 Index Ad COM 922908710 8,733 28,145 SH   SOLE   11,747 0 16,399