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
AMETEK, Inc. COM 031100100 108,085 1,596,535 SH   SOLE   1,452,375 0 144,160
ANSYS, Inc. COM 03662Q105 56,978 398,615 SH   SOLE   363,365 0 35,250
Advance Auto Parts, Inc. COM 00751Y106 101,818 646,630 SH   SOLE   588,640 0 57,990
Akamai Technologies, Inc. COM 00971T101 36,616 599,475 SH   SOLE   546,570 0 52,905
Altra Industrial Motion Corp. COM 02208R106 48,548 1,930,320 SH   SOLE   1,340,985 0 589,335
Aptargroup, Inc. COM 038336103 148,369 1,577,215 SH   SOLE   1,437,195 0 140,020
Argo Group International Holdi COM G0464B107 104,410 1,552,563 SH   SOLE   1,056,183 0 496,380
Arthur J. Gallagher & Co. COM 363576109 161,057 2,185,300 SH   SOLE   1,988,345 0 196,955
Avanos Medical, Inc. COM 05350V106 93,968 2,097,972 SH   SOLE   1,446,627 0 651,345
B&G Foods, Inc. COM 05508R106 80,827 2,795,815 SH   SOLE   1,913,650 0 882,165
Barnes Group Inc. COM 067806109 45,489 848,365 SH   SOLE   587,715 0 260,650
Bio-Techne Corporation COM 09073M104 102,476 708,100 SH   SOLE   650,365 0 57,735
BlackLine, Inc. COM 09239B109 51,593 1,259,900 SH   SOLE   868,640 0 391,260
Blackbaud, Inc. COM 09227Q100 153,005 2,432,505 SH   SOLE   1,945,620 0 486,885
Boston Beer Company, Inc. Clas COM 100557107 32,226 133,805 SH   SOLE   91,335 0 42,470
Brown-Forman Corporation Class COM 115637209 68,333 1,436,165 SH   SOLE   1,316,415 0 119,750
Bryn Mawr Bank Corporation COM 117665109 32,287 938,580 SH   SOLE   656,950 0 281,630
CONMED Corporation COM 207410101 91,304 1,422,180 SH   SOLE   983,425 0 438,755
CVB Financial Corp. COM 126600105 44,443 2,196,905 SH   SOLE   1,513,145 0 683,760
Campbell Soup Company COM 134429109 62,036 1,880,435 SH   SOLE   1,711,185 0 169,250
Cantel Medical Corp. COM 138098108 64,460 865,820 SH   SOLE   690,850 0 174,970
Cardiovascular Systems, Inc. COM 141619106 73,814 2,590,880 SH   SOLE   1,789,240 0 801,640
Catalent Inc COM 148806102 119,695 3,838,830 SH   SOLE   3,172,315 0 666,515
Chase Corporation COM 16150R104 13,950 139,435 SH   SOLE   95,300 0 44,135
Commerce Bancshares, Inc. COM 200525103 67,727 1,201,480 SH   SOLE   1,093,974 0 107,506
Community Bank System, Inc. COM 203607106 45,803 785,650 SH   SOLE   538,295 0 247,355
Cooper Companies, Inc. COM 216648402 99,130 389,510 SH   SOLE   357,520 0 31,990
Cullen/Frost Bankers, Inc. COM 229899109 82,297 935,835 SH   SOLE   851,235 0 84,600
DENTSPLY SIRONA, Inc. COM 24906P109 104,569 2,810,240 SH   SOLE   2,557,930 0 252,310
Edwards Lifesciences Corporati COM 28176E108 102,702 670,510 SH   SOLE   610,675 0 59,835
El Pollo Loco Holdings Inc COM 268603107 12,765 841,465 SH   SOLE   528,830 0 312,635
Envestnet, Inc. COM 29404K106 31,125 632,750 SH   SOLE   443,380 0 189,370
Everest Re Group, Ltd. COM G3223R108 185,419 851,485 SH   SOLE   775,575 0 75,910
Evoqua Water Technologies Corp COM 30057T105 12,039 1,254,080 SH   SOLE   876,030 0 378,050
First Financial Bankshares, In COM 32020R109 12,038 208,675 SH   SOLE   130,690 0 77,985
Flowers Foods, Inc. COM 343498101 114,190 6,182,485 SH   SOLE   5,633,480 0 549,005
Fortive Corp. COM 34959J108 123,775 1,829,370 SH   SOLE   1,703,010 0 126,360
Gates Industrial Corporation p COM G39108108 73,464 5,548,670 SH   SOLE   5,053,450 0 495,220
German American Bancorp, Inc. COM 373865104 28,846 1,038,745 SH   SOLE   711,380 0 327,365
Guidewire Software, Inc. COM 40171V100 77,373 964,385 SH   SOLE   879,055 0 85,330
H.B. Fuller Company COM 359694106 77,443 1,814,935 SH   SOLE   1,258,480 0 556,455
Helen of Troy Limited COM G4388N106 41,707 317,940 SH   SOLE   213,890 0 104,050
Henry Schein, Inc. COM 806407102 47,169 600,720 SH   SOLE   547,350 0 53,370
Hormel Foods Corporation COM 440452100 113,131 2,650,670 SH   SOLE   2,415,710 0 234,960
Hostess Brands, Inc. Class A COM 44109J106 81,502 7,449,950 SH   SOLE   5,167,840 0 2,282,110
IDEX Corporation COM 45167R104 98,605 780,965 SH   SOLE   710,745 0 70,220
Independent Bank Corp. COM 453836108 59,268 842,950 SH   SOLE   582,295 0 260,655
Innospec Inc. COM 45768S105 56,117 908,630 SH   SOLE   627,330 0 281,300
Insulet Corporation COM 45784P101 47,479 598,580 SH   SOLE   410,385 0 188,195
Integra LifeSciences Holdings COM 457985208 243,358 5,395,975 SH   SOLE   4,411,605 0 984,370
International Flavors & Fragra COM 459506101 112,912 840,935 SH   SOLE   763,250 0 77,685
J & J Snack Foods Corp. COM 466032109 22,492 155,555 SH   SOLE   108,775 0 46,780
J.M. Smucker Company COM 832696405 112,996 1,208,640 SH   SOLE   1,101,465 0 107,175
James River Group Holdings Ltd COM G5005R107 25,261 691,320 SH   SOLE   482,475 0 208,845
John Bean Technologies Corpora COM 477839104 71,933 1,001,710 SH   SOLE   699,370 0 302,340
John Wiley & Sons, Inc. Class COM 968223206 180,433 3,841,445 SH   SOLE   3,065,605 0 775,840
Laboratory Corporation of Amer COM 50540R409 89,330 706,950 SH   SOLE   643,920 0 63,030
LogMeIn, Inc. COM 54142L109 121,232 1,486,235 SH   SOLE   1,179,830 0 306,405
Lydall, Inc. COM 550819106 25,780 1,269,315 SH   SOLE   880,410 0 388,905
MGP Ingredients, Inc. COM 55303J106 44,066 772,410 SH   SOLE   531,755 0 240,655
MSA Safety, Inc. COM 553498106 68,330 724,830 SH   SOLE   496,650 0 228,180
Masimo Corporation COM 574795100 85,751 798,650 SH   SOLE   658,865 0 139,785
McCormick & Company, Incorpora COM 579780206 100,509 721,840 SH   SOLE   658,590 0 63,250
Medidata Solutions, Inc. COM 58471A105 158,757 2,354,750 SH   SOLE   1,904,990 0 449,760
Molson Coors Brewing Company C COM 60871R209 99,374 1,769,485 SH   SOLE   1,620,205 0 149,280
Morningstar, Inc. COM 617700109 30,668 279,205 SH   SOLE   255,165 0 24,040
Navigators Group, Inc. COM 638904102 59,630 858,105 SH   SOLE   479,180 0 378,925
New Relic, Inc. COM 64829B100 140,868 1,739,755 SH   SOLE   1,346,070 0 393,685
Nordson Corporation COM 655663102 155,604 1,303,765 SH   SOLE   1,183,000 0 120,765
Northern Trust Corporation COM 665859104 138,982 1,662,665 SH   SOLE   1,513,770 0 148,895
Novanta Inc COM 67000B104 9,679 153,640 SH   SOLE   107,335 0 46,305
NuVasive, Inc. COM 670704105 125,889 2,540,130 SH   SOLE   2,037,815 0 502,315
Nutanix, Inc. Class A COM 67059N108 100,014 2,404,770 SH   SOLE   2,192,590 0 212,180
Okta, Inc. Class A COM 679295105 183,047 2,869,070 SH   SOLE   2,282,015 0 587,055
Omnicell, Inc. COM 68213N109 34,937 570,495 SH   SOLE   383,325 0 187,170
Palo Alto Networks, Inc. COM 697435105 148,835 790,205 SH   SOLE   719,880 0 70,325
Penumbra, Inc. COM 70975L107 37,592 307,630 SH   SOLE   210,110 0 97,520
Prestige Consumer Healthcare I COM 74112D101 63,118 2,043,965 SH   SOLE   1,405,460 0 638,505
Prosperity Bancshares, Inc.(R) COM 743606105 123,679 1,985,215 SH   SOLE   1,620,840 0 364,375
Pure Storage, Inc. Class A COM 74624M102 138,918 8,639,190 SH   SOLE   6,825,405 0 1,813,785
Q2 Holdings, Inc. COM 74736L109 62,100 1,253,270 SH   SOLE   873,935 0 379,335
Qualys, Inc. COM 74758T303 67,716 906,025 SH   SOLE   625,735 0 280,290
Red Hat, Inc. COM 756577102 166,774 949,520 SH   SOLE   864,620 0 84,900
Ritchie Bros. Auctioneers Inco COM 767744105 221,392 6,766,250 SH   SOLE   5,414,265 0 1,351,985
Rockwell Automation, Inc. COM 773903109 109,183 725,565 SH   SOLE   660,155 0 65,410
SVB Financial Group COM 78486Q101 46,041 242,425 SH   SOLE   221,065 0 21,360
Sally Beauty Holdings, Inc. COM 79546E104 127,328 7,467,940 SH   SOLE   6,048,350 0 1,419,590
Sensient Technologies Corporat COM 81725T100 100,708 1,803,185 SH   SOLE   1,248,765 0 554,420
ServiceNow, Inc. COM 81762P102 34,871 195,850 SH   SOLE   178,400 0 17,450
Simply Good Foods Co COM 82900L102 46,576 2,464,365 SH   SOLE   1,670,930 0 793,435
Splunk Inc. COM 848637104 185,409 1,768,330 SH   SOLE   1,611,545 0 156,785
Standex International Corporat COM 854231107 45,617 679,020 SH   SOLE   463,030 0 215,990
Stericycle, Inc. COM 858912108 54,633 1,489,043 SH   SOLE   1,356,448 0 132,595
Stock Yards Bancorp, Inc. COM 861025104 27,968 852,696 SH   SOLE   586,721 0 265,975
Supernus Pharmaceuticals, Inc. COM 868459108 51,995 1,565,185 SH   SOLE   1,088,645 0 476,540
Synopsys, Inc. COM 871607107 73,767 875,682 SH   SOLE   797,487 0 78,195
Tableau Software, Inc. Class A COM 87336U105 56,402 470,015 SH   SOLE   428,455 0 41,560
Teladoc Health, Inc. COM 87918A105 29,827 601,720 SH   SOLE   412,165 0 189,555
Tractor Supply Company COM 892356106 130,698 1,566,375 SH   SOLE   1,426,945 0 139,430
TreeHouse Foods, Inc. COM 89469A104 176,624 3,483,025 SH   SOLE   2,848,375 0 634,650
TriMas Corporation COM 896215209 34,153 1,251,500 SH   SOLE   859,290 0 392,210
UMB Financial Corporation COM 902788108 86,285 1,415,210 SH   SOLE   977,795 0 437,415
Ulta Beauty Inc COM 90384S303 118,217 482,835 SH   SOLE   440,230 0 42,605
Valvoline Inc. COM 92047W101 76,908 3,974,570 SH   SOLE   3,610,170 0 364,400
Veeva Systems Inc Class A COM 922475108 103,522 1,159,000 SH   SOLE   1,055,050 0 103,950
Verisk Analytics Inc COM 92345Y106 123,634 1,133,840 SH   SOLE   1,032,650 0 101,190
Washington Trust Bancorp, Inc. COM 940610108 34,730 730,700 SH   SOLE   499,230 0 231,470
Waters Corporation COM 941848103 155,874 826,260 SH   SOLE   751,580 0 74,680
Welbilt Inc COM 949090104 68,525 6,167,875 SH   SOLE   4,213,715 0 1,954,160
West Pharmaceutical Services, COM 955306105 55,680 567,985 SH   SOLE   517,145 0 50,840
Wolverine World Wide, Inc. COM 978097103 59,391 1,862,370 SH   SOLE   1,274,905 0 587,465
Woodward, Inc. COM 980745103 77,353 1,041,230 SH   SOLE   715,420 0 325,810
Workday, Inc. Class A COM 98138H101 169,390 1,060,810 SH   SOLE   967,895 0 92,915
Yext, Inc. COM 98585N106 48,045 3,235,370 SH   SOLE   2,237,020 0 998,350
e.l.f. Beauty, Inc. COM 26856L103 29,665 3,425,575 SH   SOLE   2,345,490 0 1,080,085
Alibaba Group Holding Ltd. Spo ADR 01609W102 200 1,460 SH   SOLE   1,460 0 0
Ambev SA Sponsored ADR ADR 02319V103 53 13,600 SH   SOLE   13,600 0 0
Noah Holdings Ltd. Sponsored A ADR 65487X102 542 12,515 SH   SOLE   12,515 0 0
Talend SA Sponsored ADR ADR 874224207 35,946 969,410 SH   SOLE   698,070 0 271,340