Ticker	Issuer	Shares	Value	%	Est. Cost	Unrealized	Class	CUSIP
ADP	Automatic Data Processing	240,336	$26.27M	4.6%	$45.45	+97.1%	COMM	053015103
MA	Mastercard	178,322	$25.18M	4.4%	$70.99	+78.0%	COMM	57636Q104
SYK	Stryker	136,409	$19.37M	3.4%	$61.57	+112.4%	COMM	863667101
ECL	Ecolab	140,468	$18.07M	3.2%	$74.34	+61.5%	COMM	278865100
AAPL	Apple	112,677	$17.37M	3.1%	$18.35	+97.0%	COMM	037833100
TJX	TJX Companies	226,028	$16.66M	2.9%	$21.46	+47.6%	COMM	872540109
JNJ	Johnson & Johnson	116,489	$15.14M	2.7%	$60.16	+74.5%	COMM	478160104
CL	Colgate-Palmolive	206,857	$15.07M	2.7%	$44.45	+33.2%	COMM	194162103
KO	Coca-Cola	311,371	$14.02M	2.5%	$27.85	+25.4%	COMM	191216100
—	Celgene	92,735	$13.52M	2.4%	$102.98	—	COMM	151020104
NKE	NIKE 'B'	254,025	$13.17M	2.3%	$42.11	+19.6%	COMM	654106103
MCD	McDonald's	83,366	$13.06M	2.3%	$71.80	+79.2%	COMM	580135101
MKC	McCormick	124,615	$12.79M	2.3%	$28.42	+44.6%	COMM	579780206
FISV	Fiserv	95,980	$12.38M	2.2%	$26.39	+135.4%	COMM	337738108
CHD	Church & Dwight	236,453	$11.46M	2.0%	$35.05	+30.3%	COMM	171340102
ABT	Abbott Labs	212,252	$11.33M	2.0%	$29.43	+47.3%	COMM	002824100
XOM	ExxonMobil	135,541	$11.11M	2.0%	$53.77	+1.1%	COMM	30231G102
ABBV	AbbVie	120,093	$10.67M	1.9%	$26.55	+102.1%	COMM	00287Y109
PG	Procter & Gamble	114,008	$10.37M	1.8%	$57.11	+27.9%	COMM	742718109
MSFT	Microsoft	128,268	$9.555M	1.7%	$26.70	+149.7%	COMM	594918104
PEP	PepsiCo	80,171	$8.934M	1.6%	$56.34	+58.7%	COMM	713448108
INTU	Intuit	55,223	$7.849M	1.4%	$57.59	+126.1%	COMM	461202103
FDS	FactSet Research Systems	42,951	$7.736M	1.4%	$93.65	+60.2%	COMM	303075105
NEE	NextEra Energy	50,463	$7.395M	1.3%	$22.40	+32.7%	COMM	65339F101
—	United Technologies	62,096	$7.208M	1.3%	$94.07	—	COMM	913017109
—	Walgreens Boots Alliance	89,128	$6.882M	1.2%	$76.03	—	COMM	931427108
DHR	Danaher	78,660	$6.747M	1.2%	$37.78	+88.1%	COMM	235851102
PFF	iShares S&P US Pfd	156,080	$6.057M	1.1%	$39.21	—	DEBT	464288687
BF/B	Brown-Forman 'B'	108,919	$5.914M	1.0%	$28.10	+23.7%	COMM	115637209
BR	Broadridge Financial Solutions	71,316	$5.764M	1.0%	$42.94	+55.7%	COMM	11133T103
ACN	Accenture Ltd. 'A'	42,219	$5.703M	1.0%	$81.04	+41.5%	COMM	G1151C101
IDXX	IDEXX Labs	35,992	$5.596M	1.0%	$61.57	+156.8%	COMM	45168D104
DIS	Disney, Walt	56,315	$5.551M	1.0%	$88.45	+9.6%	COMM	254687106
ITW	Illinois Tool Works	36,060	$5.335M	0.9%	$50.91	+128.0%	COMM	452308109
USB	US Bancorp	99,290	$5.321M	0.9%	$24.69	+52.9%	COMM	902973304
AMT	American Tower 'A'	38,543	$5.268M	0.9%	$81.64	+37.6%	COMM	03027X100
GOOGL	Alphabet Class A	5,405	$5.263M	0.9%	$40.71	+15.6%	COMM	02079K305
SBUX	Starbucks	97,504	$5.237M	0.9%	$40.19	+15.0%	COMM	855244109
SYY	Sysco	92,157	$4.972M	0.9%	$24.84	+68.4%	COMM	871829107
MPC	Marathon Petroleum	79,479	$4.457M	0.8%	$37.15	+11.2%	COMM	56585A102
LLY	Lilly, Eli	40,332	$3.45M	0.6%	$42.21	+70.9%	COMM	532457108
BDX	Becton, Dickinson	16,882	$3.308M	0.6%	$126.51	+35.2%	COMM	075887109
PAYX	Paychex	54,525	$3.269M	0.6%	$26.21	+70.1%	COMM	704326107
MRK	Merck	50,337	$3.223M	0.6%	$40.51	+15.2%	COMM	58933Y105
GILD	Gilead Sciences	38,393	$3.111M	0.5%	$55.92	+0.0%	COMM	375558103
VZ	Verizon Communications	62,119	$3.074M	0.5%	$27.31	+10.7%	COMM	92343V104
BCPC	Balchem	36,525	$2.969M	0.5%	$48.33	+51.5%	COMM	057665200
WSO	Watsco	17,915	$2.886M	0.5%	$147.14	+2.7%	COMM	942622200
APD	Air Products & Chemicals	18,957	$2.867M	0.5%	$61.75	+92.9%	COMM	009158106
T	AT&T	73,025	$2.86M	0.5%	$11.87	+31.4%	COMM	00206R102
CTSH	Cognizant Technology	38,562	$2.797M	0.5%	$44.37	+40.8%	COMM	192446102
EMR	Emerson Electric	43,494	$2.733M	0.5%	$39.88	+23.4%	COMM	291011104
BRK/B	Berkshire Hathaway 'B'	14,880	$2.728M	0.5%	$146.39	+20.7%	COMM	084670702
JKHY	Jack Henry & Associates	26,470	$2.721M	0.5%	$57.63	+62.6%	COMM	426281101
QCOM	QUALCOMM	51,973	$2.694M	0.5%	$46.43	-8.9%	COMM	747525103
EL	Estee Lauder	24,603	$2.653M	0.5%	$76.46	+20.9%	COMM	518439104
MMM	3M Company	12,513	$2.626M	0.5%	$70.79	+83.5%	COMM	88579Y101
RHHBY	Roche Holding Ltd ADR	81,900	$2.621M	0.5%	$49.05	—	COMM	771195104
CSCO	Cisco Systems	76,071	$2.558M	0.5%	$15.33	+61.2%	COMM	17275R102
NVO	Novo Nordisk ADR	52,461	$2.526M	0.4%	$68.55	—	COMM	670100205
WMT	Wal-Mart Stores	31,530	$2.464M	0.4%	$19.98	+14.6%	COMM	931142103
—	CDK Global	38,580	$2.434M	0.4%	$59.68	—	COMM	12508E101
UNP	Union Pacific	20,621	$2.391M	0.4%	$74.60	+19.5%	COMM	907818108
LOW	Lowe's	29,775	$2.38M	0.4%	$32.88	+99.7%	COMM	548661107
AMGN	Amgen	12,300	$2.293M	0.4%	$73.61	+86.8%	COMM	031162100
—	General Electric	94,544	$2.286M	0.4%	$23.44	—	COMM	369604103
HD	Home Depot	13,584	$2.222M	0.4%	$58.60	+113.6%	COMM	437076102
INTC	Intel	57,596	$2.193M	0.4%	$17.46	+69.5%	COMM	458140100
PM	Philip Morris Int'l	19,577	$2.173M	0.4%	$49.72	+51.3%	COMM	718172109
WEX	WEX	18,940	$2.125M	0.4%	$95.29	+13.7%	COMM	96208T104
PFE	Pfizer	59,013	$2.107M	0.4%	$17.79	+25.1%	COMM	717081103
—	Weingarten Realty	64,573	$2.05M	0.4%	$35.24	—	COMM	948741103
CVS	CVS Health	25,000	$2.033M	0.4%	$57.13	+6.5%	COMM	126650100
HP	Helmerich & Payne	37,572	$1.958M	0.3%	$62.73	-21.1%	COMM	423452101
AMZN	Amazon.com	1,966	$1.89M	0.3%	$13.43	+265.8%	COMM	023135106
—	Stericycle	25,207	$1.805M	0.3%	$112.40	—	COMM	858912108
HON	Honeywell Int'l	12,358	$1.752M	0.3%	$104.34	0.0%	COMM	438516106
IBM	IBM	10,574	$1.534M	0.3%	$118.94	-18.6%	COMM	459200101
WELL	Welltower	20,625	$1.45M	0.3%	$54.00	-0.1%	COMM	95040Q104
EOG	EOG Resources	14,910	$1.442M	0.3%	$59.23	+13.9%	COMM	26875P101
HSIC	Henry Schein	17,542	$1.438M	0.3%	$52.84	+29.1%	COMM	806407102
EXPD	Expeditors Int'l	23,950	$1.434M	0.3%	$31.69	+63.1%	COMM	302130109
XRAY	Dentsply Sirona	23,814	$1.424M	0.3%	$59.08	+0.6%	COMM	24906P109
—	Tiffany	15,215	$1.396M	0.2%	$75.16	—	COMM	886547108
PPG	PPG Industries	12,457	$1.354M	0.2%	$91.06	0.0%	COMM	693506107
V	Visa	12,851	$1.352M	0.2%	$77.03	+24.2%	COMM	92826C839
DE	Deere & Company	10,375	$1.303M	0.2%	$68.53	+58.4%	COMM	244199105
FAST	Fastenal	27,750	$1.265M	0.2%	$8.79	-1.4%	COMM	311900104
GWW	Grainger, W.W.	7,012	$1.26M	0.2%	$204.51	-26.9%	COMM	384802104
—	Praxair	8,870	$1.239M	0.2%	$116.25	—	COMM	74005P104
SLB	Schlumberger	17,406	$1.214M	0.2%	$55.16	-6.0%	COMM	806857108
FLO	Flowers Foods	63,250	$1.19M	0.2%	$13.95	-8.7%	COMM	343498101
BMY	Bristol-Myers Squibb	16,186	$1.032M	0.2%	$45.82	-5.9%	COMM	110122108
D	Dominion Energy	13,347	$1.027M	0.2%	$34.53	+55.4%	COMM	25746U109
ISRG	Intuitive Surgical	965	$1.009M	0.2%	$54.33	+100.6%	COMM	46120E602
FTV	Fortive	13,885	$983K	0.2%	$31.13	+29.2%	COMM	34959J108
TSCO	Tractor Supply Company	14,965	$947K	0.2%	$15.06	-33.8%	COMM	892356106
BFS	Saul Centers	15,130	$937K	0.2%	$46.29	—	COMM	804395101
—	Kellogg	14,700	$917K	0.2%	$38.92	+19.5%	COMM	487836108
—	Dr. Pepper Snapple	9,760	$863K	0.2%	$48.97	—	COMM	26138E109
ROST	Ross Stores	12,410	$801K	0.1%	$38.48	+37.6%	COMM	778296103
HSY	Hershey Company	7,275	$794K	0.1%	$72.44	+20.4%	COMM	427866108
HCSG	Healthcare Services Group	14,200	$766K	0.1%	$26.62	+93.2%	COMM	421906108
ULTA	Ulta Beauty	3,315	$749K	0.1%	$211.89	+13.6%	COMM	90384S303
GPC	Genuine Parts	7,460	$714K	0.1%	$62.69	+6.4%	COMM	372460105
EQR	Equity Residential Properties	10,720	$707K	0.1%	$31.42	+56.4%	COMM	29476L107
—	Fortune Brands Home & Security	10,347	$696K	0.1%	$67.27	—	COMM	34964c106
—	Raytheon	3,653	$682K	0.1%	$186.70	—	COMM	755111507
CSX	CSX	12,156	$660K	0.1%	$6.66	+129.8%	COMM	126408103
CVX	Chevron	5,557	$653K	0.1%	$69.63	+9.4%	COMM	166764100
—	DowDupont	8,923	$618K	0.1%	$69.26	—	COMM	26078J100
ALCO	Alico	17,866	$610K	0.1%	$27.33	0.0%	COMM	016230104
ZTS	Zoetis	9,500	$606K	0.1%	$52.53	+11.8%	COMM	98978V103
FDX	FedEx	2,662	$600K	0.1%	$184.90	0.0%	COMM	31428X106
—	Marathon Oil	44,260	$600K	0.1%	$13.56	—	COMM	565849106
TRMB	Trimble	14,160	$556K	0.1%	$29.78	+27.7%	COMM	896239100
HPQ	HP	27,700	$553K	0.1%	$11.22	+28.7%	COMM	40434L105
EW	Edwards Lifesciences	5,025	$549K	0.1%	$37.27	+2.3%	COMM	28176E108
—	HCP	19,600	$545K	0.1%	$43.65	—	COMM	40414L109
JPM	JPMorgan Chase	4,943	$472K	0.1%	$45.09	+63.4%	COMM	46625H100
CAT	Caterpillar	3,553	$443K	0.1%	$60.35	+59.1%	COMM	149123101
DUK	Duke Energy	5,180	$435K	0.1%	$42.75	+42.3%	COMM	26441C204
PRAA	PRA Group	15,100	$433K	0.1%	$34.09	-2.1%	COMM	69354N106
SEIC	SEI Investments	7,000	$427K	0.1%	$26.47	+92.7%	COMM	784117103
HPE	Hewlett Packard Enterprise	27,700	$407K	0.1%	$6.50	+62.4%	COMM	42824C109
MNST	Monster Beverage	7,264	$401K	0.1%	$23.31	+15.7%	COMM	61174X109
—	WGL Holdings	4,717	$397K	0.1%	$61.55	—	COMM	92924F106
STT	State Street	3,899	$373K	0.1%	$57.63	+25.2%	COMM	857477103
MO	Altria	5,833	$370K	0.1%	$24.45	+47.6%	COMM	02209S103
—	Time Warner New	3,610	$370K	0.1%	$87.19	—	COMM	887317303
NOC	Northrop Grumman	1,282	$369K	0.1%	$114.24	+105.7%	COMM	666807102
INGR	Ingredion	3,000	$362K	0.1%	$80.34	+51.7%	COMM	457187102
KHC	Kraft Heinz	4,538	$352K	0.1%	$48.53	+16.2%	COMM	500754106
MDLZ	Mondelez Int'l	7,963	$324K	0.1%	$28.45	+21.9%	COMM	609207105
COP	ConocoPhillips	6,435	$322K	0.1%	$42.95	-19.8%	COMM	20825C104
—	Aetna	2,000	$318K	0.1%	$127.00	—	COMM	00817Y108
WY	Weyerhaeuser	9,088	$309K	0.1%	$18.65	+26.9%	COMM	962166104
GOOG	Alphabet Class C	305	$293K	0.1%	$35.61	+29.8%	COMM	02079K107
CMI	Cummins	1,700	$286K	0.1%	$89.89	+44.6%	COMM	231021106
—	Noble Energy	9,900	$281K	0.0%	$60.00	—	COMM	655044105
BRK/A	Berkshire Hathaway 'A'	1	$275K	0.0%	$199512.94	+33.0%	COMM	084670108
KIM	Kimco Realty	13,750	$269K	0.0%	$12.78	+0.7%	COMM	49446R109
—	L3 Technologies	1,425	$269K	0.0%	$146.89	—	COMM	502424104
PGR	Progressive	5,200	$252K	0.0%	$29.31	+23.3%	COMM	743315103
BTI	British American Tobacco	3,854	$241K	0.0%	$62.53	—	COMM	110448107
SU	Suncor Energy	6,750	$236K	0.0%	$23.36	0.0%	COMM	867224107
—	The Priceline Group	128	$234K	0.0%	$1861.33	—	COMM	741503403
NSC	Norfolk Southern	1,755	$232K	0.0%	$102.71	0.0%	COMM	655844108
PSX	Phillips 66	2,478	$227K	0.0%	$61.25	0.0%	COMM	718546104
—	Versum Materials	5,728	$222K	0.0%	$38.76	—	COMM	92532W103
ORCL	Oracle	4,599	$222K	0.0%	$37.03	+18.7%	COMM	68389X105
COST	Costco Wholesale	1,314	$216K	0.0%	$140.12	0.0%	COMM	22160K105
VFC	VF Corporation	3,365	$214K	0.0%	$61.34	-5.9%	COMM	918204108
CTAS	Cintas	1,450	$209K	0.0%	$30.49	0.0%	COMM	172908105
WM	Waste Management	2,616	$205K	0.0%	$65.63	0.0%	COMM	94106L109
DXC	DXC Technology	2,379	$204K	0.0%	$67.37	0.0%	COMM	23355L106