Foster Dykema Cabot & Co 13F-HR Quarterly holdings report by institutional manager

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 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
Sprott Physical Gold Trust Uni	COM	85207H104	937	76,917	SH		SOLE		76,917	0	0
Sprott Physical Silver Trust	COM	85207K107	96	14,670	SH		SOLE		14,670	0	0
Xtrackers MSCI All World ex US	COM	233051820	626	21,658	SH		SOLE		21,658	0	0
JPMorgan Hedged Equity Select	COM	46637K281	77,499	3,645,287	SH		SOLE		3,645,287	0	0
Tocqueville Gold Fund	COM	888894862	421	10,124	SH		SOLE		10,124	0	0
3M Company	COM	88579Y101	508	2,880	SH		SOLE		2,880	0	0
Abbott Laboratories	COM	002824100	558	6,421	SH		SOLE		6,421	0	0
AbbVie, Inc.	COM	00287y109	514	5,802	SH		SOLE		5,802	0	0
Accenture PLC	COM	G1151c101	12,711	60,363	SH		SOLE		60,363	0	0
Air Products and Chemicals, In	COM	009158106	564	2,400	SH		SOLE		2,400	0	0
Alibaba Group Holding Ltd. Spo	COM	01609W102	248	1,170	SH		SOLE		1,170	0	0
Alphabet Inc. Class A	COM	02079K305	1,176	878	SH		SOLE		878	0	0
Alphabet Inc. Class C	COM	02079K107	2,175	1,627	SH		SOLE		1,627	0	0
Amazon.com, Inc.	COM	023135106	11,571	6,262	SH		SOLE		6,262	0	0
American Express Company	COM	025816109	1,114	8,952	SH		SOLE		8,952	0	0
Amphenol Corporation Class A	COM	032095101	13,549	125,186	SH		SOLE		125,186	0	0
Apple Inc.	COM	037833100	5,144	17,516	SH		SOLE		17,516	0	0
AT&T Inc.	COM	00206R102	569	14,563	SH		SOLE		14,563	0	0
Automatic Data Processing, Inc	COM	053015103	520	3,048	SH		SOLE		3,048	0	0
Becton Dickinson & Company	COM	075887109	12,143	44,647	SH		SOLE		44,647	0	0
Berkshire Hathaway, Inc. Cl. A	COM	084670108	3,735	11	SH		SOLE		11	0	0
Berkshire Hathaway, Inc. Cl. B	COM	084670702	25,330	111,831	SH		SOLE		111,831	0	0
BlackRock Inc.	COM	09247X101	275	547	SH		SOLE		547	0	0
Boeing Company	COM	097023105	17,760	54,519	SH		SOLE		54,519	0	0
Bristol-Myers Squibb Company	COM	110122108	680	10,595	SH		SOLE		10,595	0	0
Cisco Systems, Inc.	COM	17275R102	300	6,254	SH		SOLE		6,254	0	0
Coca-Cola Company	COM	191216100	2,627	47,468	SH		SOLE		47,468	0	0
Colgate-Palmolive Company	COM	194162103	746	10,834	SH		SOLE		10,834	0	0
Costco Wholesale Corporation	COM	22160K105	12,789	43,512	SH		SOLE		43,512	0	0
Eli Lilly and Company	COM	532457108	227	1,730	SH		SOLE		1,730	0	0
Enterprise Bancorp, Inc.	COM	293668109	1,060	31,306	SH		SOLE		31,306	0	0
Exxon Mobil Corporation	COM	30231G102	542	7,764	SH		SOLE		7,764	0	0
General Electric Company	COM	369604103	224	20,046	SH		SOLE		20,046	0	0
Hershey Company	COM	427866108	363	2,468	SH		SOLE		2,468	0	0
IBM Corporation	COM	459200101	1,071	7,991	SH		SOLE		7,991	0	0
Illinois Tool Works Inc.	COM	452308109	465	2,586	SH		SOLE		2,586	0	0
Intel Corporation	COM	458140100	686	11,462	SH		SOLE		11,462	0	0
J. M. Smucker Company	COM	832696405	604	5,803	SH		SOLE		5,803	0	0
Johnson & Johnson	COM	478160104	1,727	11,839	SH		SOLE		11,839	0	0
Johnson Controls International	COM	G51502105	414	10,180	SH		SOLE		10,180	0	0
JPMorgan Chase & Co.	COM	46625H100	13,038	93,529	SH		SOLE		93,529	0	0
Laboratory Corporation of Amer	COM	50540R409	249	1,472	SH		SOLE		1,472	0	0
Lockheed Martin Corporation	COM	539830109	330	848	SH		SOLE		848	0	0
Loews Corporation	COM	540424108	315	6,000	SH		SOLE		6,000	0	0
McCormick & Co., Inc. Non-Voti	COM	579780206	1,358	8,000	SH		SOLE		8,000	0	0
McDonald's Corporation	COM	580135101	868	4,391	SH		SOLE		4,391	0	0
Merck & Co., Inc.	COM	58933y105	598	6,573	SH		SOLE		6,573	0	0
Microsoft Corporation	COM	594918104	19,350	122,699	SH		SOLE		122,699	0	0
Netflix, Inc.	COM	64110l106	327	1,010	SH		SOLE		1,010	0	0
NIKE, Inc. Class B	COM	654106103	234	2,309	SH		SOLE		2,309	0	0
PepsiCo, Inc.	COM	713448108	1,460	10,683	SH		SOLE		10,683	0	0
Pfizer Inc.	COM	717081103	785	20,034	SH		SOLE		20,034	0	0
Procter & Gamble Company	COM	742718109	79,672	637,883	SH		SOLE		637,883	0	0
Progressive Corporation	COM	743315103	444	6,132	SH		SOLE		6,132	0	0
S&P Global, Inc.	COM	78409v104	2,662	9,750	SH		SOLE		9,750	0	0
Schlumberger NV	COM	806857108	598	14,875	SH		SOLE		14,875	0	0
ShotSpotter, Inc.	COM	82536T107	536	21,005	SH		SOLE		21,005	0	0
Thermo Fisher Scientific Inc	COM	883556102	13,833	42,581	SH		SOLE		42,581	0	0
Union Pacific Corporation	COM	907818108	624	3,453	SH		SOLE		3,453	0	0
United Technologies Corporatio	COM	913017109	339	2,265	SH		SOLE		2,265	0	0
Visa Inc. Class A	COM	92826c839	14,185	75,493	SH		SOLE		75,493	0	0
Wal-Mart Stores, Inc.	COM	931142103	662	5,570	SH		SOLE		5,570	0	0
Walt Disney Company	COM	254687106	767	5,302	SH		SOLE		5,302	0	0
Wells Fargo & Company	COM	949746101	387	7,202	SH		SOLE		7,202	0	0
Columbia Emerging Markets Cons	COM	19762B509	212	9,033	SH		SOLE		9,033	0	0
First Trust Morningstar Divide	COM	336917109	261	8,012	SH		SOLE		8,012	0	0
Invesco FTSE RAFI US 1000 Port	COM	46137V613	16,788	132,491	SH		SOLE		132,491	0	0
iShares Core MSCI EAFE ETF	COM	46432F842	56,186	861,216	SH		SOLE		861,216	0	0
iShares Core MSCI Total Intern	COM	46432F834	277	4,482	SH		SOLE		4,482	0	0
iShares Core S&P 500 ETF	COM	464287200	872	2,697	SH		SOLE		2,697	0	0
iShares Core S&P Small Cap ETF	COM	464287804	10,888	129,855	SH		SOLE		129,855	0	0
iShares Core S&P U.S. Value ET	COM	464287663	35,061	556,351	SH		SOLE		556,351	0	0
iShares Edge MSCI Min Vol USA	COM	46429b697	23,589	359,591	SH		SOLE		359,591	0	0
iShares Edge MSCI USA Momentum	COM	46432F396	22,314	177,718	SH		SOLE		177,718	0	0
iShares Edge MSCI USA Quality	COM	46432f339	23,491	232,585	SH		SOLE		232,585	0	0
iShares MSCI ACWI ex U.S. ETF	COM	464288240	591	12,031	SH		SOLE		12,031	0	0
iShares MSCI EAFE ETF	COM	464287465	207	2,978	SH		SOLE		2,978	0	0
iShares MSCI Global Impact ETF	COM	46435G532	1,042	15,928	SH		SOLE		15,928	0	0
iShares Russell 1000 ETF	COM	464287622	979	5,485	SH		SOLE		5,485	0	0
iShares Russell 1000 Growth ET	COM	464287614	3,324	18,897	SH		SOLE		18,897	0	0
iShares Russell 1000 Value ETF	COM	464287598	2,247	16,466	SH		SOLE		16,466	0	0
iShares Russell 2000 ETF	COM	464287655	477	2,882	SH		SOLE		2,882	0	0
iShares Russell 2000 Growth In	COM	464287648	364	1,701	SH		SOLE		1,701	0	0
iShares Russell Midcap ETF	COM	464287499	751	12,591	SH		SOLE		12,591	0	0
iShares S&P 100 ETF	COM	464287101	649	4,504	SH		SOLE		4,504	0	0
iShares S&P 500 Growth ETF	COM	464287309	8,568	44,245	SH		SOLE		44,245	0	0
SPDR S&P 500 ETF Trust	COM	78462F103	113,317	352,069	SH		SOLE		352,069	0	0
SPDR S&P 500 Fossil Fuel Reser	COM	78468R796	297	3,768	SH		SOLE		3,768	0	0
Technology Select Sector SPDR	COM	81369Y803	2,571	28,044	SH		SOLE		28,044	0	0
Vanguard Dividend Appreciation	COM	921908844	523	4,197	SH		SOLE		4,197	0	0
Vanguard FTSE Developed Market	COM	921943858	1,893	42,967	SH		SOLE		42,967	0	0
Vanguard FTSE Emerging Markets	COM	922042858	674	15,156	SH		SOLE		15,156	0	0
Vanguard S&P 500 Index Fund	COM	922908363	1,856	6,275	SH		SOLE		6,275	0	0
Vanguard Total Stock Market In	COM	922908769	13,417	82,003	SH		SOLE		82,003	0	0
Vanguard Value Index Fund	COM	922908744	203	1,690	SH		SOLE		1,690	0	0