Ticker	Issuer	Shares	Value	%	Est. Cost	Unrealized	Class	CUSIP
CGNX	Cognex	1,139,410	$72.49M	5.6%	$22.26	+19.6%	COM	192422103
MANH	Manhattan Associates	1,363,047	$72.28M	5.6%	$60.05	-11.2%	COM	562750109
IDXX	IDEXX Laboratories	578,980	$67.9M	5.3%	$59.48	+91.8%	COM	45168D104
ICLR	ICON PLC	829,994	$62.42M	4.8%	$37.15	+109.1%	COM	G4705A100
GNTX	Gentex	2,353,101	$46.33M	3.6%	$17.28	+5.3%	COM	371901109
HOLX	Hologic	1,153,534	$46.28M	3.6%	$37.75	+2.2%	COM	436440101
FDS	FactSet Research System	262,729	$42.94M	3.3%	$155.27	-6.5%	COM	303075105
RMD	ResMed	673,085	$41.77M	3.2%	$59.94	-7.5%	COM	761152107
SEIC	SEI Investments	816,625	$40.31M	3.1%	$41.66	-0.2%	COM	784117103
—	HMS Holdings	2,193,923	$39.84M	3.1%	$18.15	—	COM	40425J101
NICE	NICE	523,459	$35.99M	2.8%	$66.94	—	COM	653656108
JKHY	Jack Henry & Associates	382,533	$33.96M	2.6%	$78.38	-2.3%	COM	426281101
ILMN	Illumina	243,345	$31.16M	2.4%	$159.51	-15.5%	COM	452327109
AVAV	AeroVironment	1,059,412	$28.42M	2.2%	$26.83	-3.4%	COM	008073108
—	Advisory Board	802,391	$26.68M	2.1%	$45.43	—	COM	00762W107
—	NuVasive Conv Sr Notes	16,135,000	$26.18M	2.0%	$0.99	—	CONV	670704AC9
—	Albany Molecular Research	1,379,517	$25.88M	2.0%	$16.51	—	COM	012423109
—	Verint Systems	688,595	$24.27M	1.9%	$46.64	—	COM	92343x100
ZBRA	Zebra Technologies	279,800	$24M	1.9%	$61.48	+20.6%	COM	989207105
TRMB	Trimble	786,382	$23.71M	1.8%	$26.75	+7.1%	COM	896239100
FTNT	Fortinet	782,715	$23.57M	1.8%	$6.87	-9.0%	COM	34959E109
HAE	Haemonetics	567,896	$22.83M	1.8%	$34.33	+9.8%	COM	405024100
DORM	Dorman Products	310,395	$22.68M	1.8%	$61.53	+11.0%	COM	258278100
—	Cambrex	391,938	$21.14M	1.6%	$45.72	—	COM	132011107
—	Tivity Health	895,725	$20.38M	1.6%	$22.75	—	COM	88870R102
—	Mednax	291,945	$19.46M	1.5%	$69.87	—	COM	58502b106
—	ANSYS	205,612	$19.02M	1.5%	$82.02	—	COM	03662Q105
FORR	Forrester Research	413,702	$17.77M	1.4%	$37.89	+0.9%	COM	346563109
—	Gigamon	386,850	$17.62M	1.4%	$44.95	—	COM	37518B102
—	Cynosure	380,705	$17.36M	1.3%	$46.72	—	COM	232577205
FELE	Franklin Electric	441,995	$17.19M	1.3%	$34.33	+3.9%	COM	353514102
BLKB	Blackbaud	248,970	$15.93M	1.2%	$46.10	+36.1%	COM	09227Q100
MORN	Morningstar	204,371	$15.03M	1.2%	$82.20	-10.6%	COM	617700109
IPGP	IPG Photonic	144,820	$14.29M	1.1%	$81.87	+13.9%	COM	44980X109
—	Medidata Solutions	275,826	$13.7M	1.1%	$43.89	—	COM	58471A105
CRL	Charles River Labs	148,150	$11.29M	0.9%	$83.83	-9.4%	COM	159864107
—	Acxiom	388,500	$10.41M	0.8%	$26.65	—	COM	005125109
CSGP	Costar Group	47,593	$8.971M	0.7%	$19.43	+1.1%	COM	22160N109
FAST	Fastenal	180,477	$8.479M	0.7%	$8.32	+3.9%	COM	311900104
HCSG	Healthcare Services Grp	213,059	$8.346M	0.6%	$39.20	-2.5%	COM	421906108
—	Albany Molecular Research Conv	6,400,000	$8.304M	0.6%	$1.27	—	CONV	012423AA7
ECL	Ecolab	70,779	$8.297M	0.6%	$108.98	-2.8%	COM	278865100
MMSI	Merit Medical Systems	291,250	$7.718M	0.6%	$23.10	+4.5%	COM	589889104
AMGN	Amgen	51,745	$7.566M	0.6%	$127.72	-10.5%	COM	031162100
ACIW	ACI Worldwide	398,000	$7.224M	0.6%	$18.98	-1.4%	COM	004498101
HURN	Huron Consulting Grp	142,481	$7.217M	0.6%	$61.80	-13.7%	COM	447462102
—	Ritchie Bros. Auctioneers	193,907	$6.593M	0.5%	$35.07	—	COM	767744105
PRLB	Proto Labs	121,589	$6.244M	0.5%	$57.05	-8.1%	COM	743713109
AZO	Autozone	7,464	$5.895M	0.5%	$778.43	-1.1%	COM	053332102
—	Celgene	44,490	$5.15M	0.4%	$104.54	—	COM	151020104
PAYX	Paychex	80,967	$4.929M	0.4%	$45.34	-3.1%	COM	704326107
GOOGL	Alphabet Class A	6,126	$4.855M	0.4%	$36.72	+8.1%	COM	02079K305
—	CyberArk Software	98,610	$4.487M	0.3%	$45.50	—	COM	M2682V108
HD	Home Depot	32,714	$4.386M	0.3%	$106.34	-2.8%	COM	437076102
—	Abaxis	80,000	$4.222M	0.3%	$51.63	—	COM	002567105
—	ComScore	133,648	$4.221M	0.3%	$28.97	—	COM	20564W105
FFIV	F5 Networks	29,045	$4.203M	0.3%	$123.21	+10.0%	COM	315616102
CVLT	CommVault Systems	80,000	$4.112M	0.3%	$50.26	+6.7%	COM	204166102
—	Envestnet Conv Sr Unsecd Note	4,110,000	$3.915M	0.3%	$0.88	—	CONV	29404KAA4
—	WebMD Health Conv Sr Notes	3,555,000	$3.631M	0.3%	$0.93	—	CONV	94770VAF9
GILD	Gilead Sciences	50,220	$3.596M	0.3%	$57.78	-7.9%	COM	375558103
—	Forward Air	74,595	$3.534M	0.3%	$43.26	—	COM	349853101
KWR	Quaker Chemical	26,000	$3.326M	0.3%	$97.60	+20.6%	COM	747316107
—	CEB	52,495	$3.181M	0.2%	$54.47	—	COM	125134106
—	Capella Education	36,130	$3.172M	0.2%	$58.03	—	COM	139594105
—	National Instruments	80,750	$2.489M	0.2%	$28.41	—	COM	636518102
LNN	Lindsay Manufacturing	30,210	$2.254M	0.2%	$63.29	+12.2%	COM	535555106
—	Federal Realty Invt Tr	15,048	$2.138M	0.2%	$153.94	—	COM	313747206
—	Linear Tech	30,600	$1.908M	0.1%	$59.29	—	COM	535678106
GOOG	Alphabet Class C	1,852	$1.429M	0.1%	$35.69	+8.3%	COM	02079K107
—	Aspen Technology	25,220	$1.379M	0.1%	$46.79	—	COM	045327103
SPY	Spdr S&P 500 Series 1	5,770	$1.29M	0.1%	$223.57	—	COM	78462F103
—	Cerner	26,250	$1.243M	0.1%	$61.76	—	COM	156782104
—	Stericycle	15,275	$1.177M	0.1%	$77.05	—	COM	858912108
—	Wright Medical Group N.V.	43,330	$996K	0.1%	$21.48	—	COM	N96617118
TBRG	Computer Programs & Systems	40,720	$961K	0.1%	$28.83	-19.7%	COM	205306103
—	VCA Antech	13,100	$899K	0.1%	$70.00	—	COM	918194101
TECH	Bio Techne	8,465	$870K	0.1%	$21.59	+15.4%	COM	09073M104
—	Genesee & Wyoming Class A	8,100	$562K	0.0%	$68.98	—	COM	371559105
—	NuVasive	6,950	$468K	0.0%	$66.62	—	COM	670704105
BMY	Bristol Myers	7,400	$432K	0.0%	$46.14	-14.3%	COM	110122108
AAPL	Apple	3,441	$399K	0.0%	$24.29	+7.4%	COM	037833100
—	ID Systems	69,200	$375K	0.0%	$4.94	—	COM	449489103
XOM	Exxon Mobil	3,961	$358K	0.0%	$51.39	+13.2%	COM	30231G102
T	AT & T	7,900	$336K	0.0%	$15.46	0.0%	COM	00206R102
—	Meridian Bioscience	18,260	$323K	0.0%	$19.29	—	COM	589584101
BRK/B	Berkshire Hathaway New Cl B	1,870	$305K	0.0%	$146.73	+4.9%	COM	084670702
JNJ	Johnson & Johnson	2,175	$251K	0.0%	$89.71	0.0%	COM	478160104
GHM	Graham	10,060	$223K	0.0%	$16.68	+9.1%	COM	384556106
—	General Electric	6,750	$213K	0.0%	$29.60	—	COM	369604103
—	Madison Covered Call & Equity	10,000	$77,000	0.0%	$7.70	—	MF	557437100
—	SITC International Holdings Co	19,000	$12,000	0.0%	$0.47	—	COM	KYG8187G1
—	Far East Horizon Ltd	11,000	$9,000	0.0%	$0.73	—	COM	HK0000077
—	Hanhua Finl Hldg	22,000	$2,000	0.0%	$0.91	—	COM	cne100001