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

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COLUMN 1COLUMN 2COLUMN 3COLUMN 4COLUMN 5COLUMN 6COLUMN 7COLUMN 8
VALUESHRS ORSH/PUT/INVESTMENTOTHERVOTING AUTHORITY
NAME OF ISSUERTITLE OF CLASSCUSIP(x$1000)PRN AMTPRNCALLDISCRETIONMANAGERSOLESHAREDNONE
Alarm.com Holdings, Inc.COM01164210540,0071,386,233SH SOLE 1,386,23300
America's Car-Mart Inc.COM03062T10541,2381,133,217SH SOLE 1,133,21700
Ansys, Inc.COM03662Q10590,781980,251SH SOLE 980,25100
Box, IncCOM10316T10479,1225,020,460SH SOLE 5,020,46000
Colfax CorporationCOM194014106125,3373,987,811SH SOLE 3,987,81100
comScore, Inc.COM20564W10529,043947,261SH SOLE 947,26100
CoStar GroupCOM22160N10967,724312,770SH SOLE 312,77000
FactSet Research Systems inc.COM30307510582,660509,934SH SOLE 509,93400
Fastenal CompanyCOM311900104117,3502,808,756SH SOLE 2,808,75600
Gartner Inc.COM366651107111,9241,265,393SH SOLE 1,265,39300
Interactive Brokers Group IncCOM45841N107112,6223,193,131SH SOLE 3,193,13100
Interactive Intelligence GroupCOM45841V109163,0582,711,304SH SOLE 2,711,30400
Markel Corp.COM57053510489,81696,704SH SOLE 96,70400
Moody's CorporationCOM615369105111,3011,027,902SH SOLE 1,027,90200
National Instruments Corp.COM63651810290,9883,203,786SH SOLE 3,203,78600
Platform Specialty Products CoCOM72766Q105114,14514,074,631SH SOLE 14,074,63100
US Ecology, Inc.COM91732J10237,004825,256SH SOLE 825,25600
Verisk Analytics, Inc.COM92345Y10685,3401,049,950SH SOLE 1,049,95000
Waters CorporationCOM94184810390,744572,553SH SOLE 572,55300