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	871	76,917	SH		SOLE		76,917	0	0
Sprott Physical Silver Trust	COM	85207K107	84	14,670	SH		SOLE		14,670	0	0
Xtrackers MSCI All World ex US	COM	233051820	592	21,658	SH		SOLE		21,658	0	0
JPMorgan Hedged Equity Select	COM	46637K281	74,777	3,685,426	SH		SOLE		3,685,426	0	0
Tocqueville Gold Fund	COM	888894862	367	10,124	SH		SOLE		10,124	0	0
3M Company	COM	88579Y101	499	2,880	SH		SOLE		2,880	0	0
Abbott Laboratories	COM	002824100	955	11,361	SH		SOLE		11,361	0	0
AbbVie, Inc.	COM	00287y109	422	5,802	SH		SOLE		5,802	0	0
Accenture PLC	COM	G1151c101	10,593	57,333	SH		SOLE		57,333	0	0
Air Products and Chemicals, In	COM	009158106	543	2,400	SH		SOLE		2,400	0	0
Alphabet Inc. Class A	COM	02079K305	964	890	SH		SOLE		890	0	0
Alphabet Inc. Class C	COM	02079K107	1,772	1,639	SH		SOLE		1,639	0	0
Amazon.com, Inc.	COM	023135106	9,052	4,780	SH		SOLE		4,780	0	0
American Express Company	COM	025816109	1,216	9,854	SH		SOLE		9,854	0	0
Amphenol Corporation Class A	COM	032095101	4,876	50,825	SH		SOLE		50,825	0	0
Apple Inc.	COM	037833100	3,523	17,798	SH		SOLE		17,798	0	0
AT&T Inc.	COM	00206R102	583	17,401	SH		SOLE		17,401	0	0
Automatic Data Processing, Inc	COM	053015103	504	3,048	SH		SOLE		3,048	0	0
Becton Dickinson & Company	COM	075887109	10,756	42,681	SH		SOLE		42,681	0	0
Berkshire Hathaway, Inc. Cl. A	COM	084670108	3,502	11	SH		SOLE		11	0	0
Berkshire Hathaway, Inc. Cl. B	COM	084670702	32,134	150,743	SH		SOLE		150,743	0	0
BlackRock Inc.	COM	09247X101	268	572	SH		SOLE		572	0	0
Boeing Company	COM	097023105	19,679	54,063	SH		SOLE		54,063	0	0
Bristol-Myers Squibb Company	COM	110122108	480	10,595	SH		SOLE		10,595	0	0
Cisco Systems, Inc.	COM	17275R102	972	17,754	SH		SOLE		17,754	0	0
Coca-Cola Company	COM	191216100	2,610	51,251	SH		SOLE		51,251	0	0
Colgate-Palmolive Company	COM	194162103	776	10,834	SH		SOLE		10,834	0	0
Costco Wholesale Corporation	COM	22160K105	10,856	41,082	SH		SOLE		41,082	0	0
Donaldson Company, Inc.	COM	257651109	305	6,000	SH		SOLE		6,000	0	0
Eli Lilly and Company	COM	532457108	460	4,150	SH		SOLE		4,150	0	0
Enterprise Bancorp, Inc.	COM	293668109	993	31,306	SH		SOLE		31,306	0	0
Exxon Mobil Corporation	COM	30231G102	693	9,038	SH		SOLE		9,038	0	0
General Electric Company	COM	369604103	267	25,424	SH		SOLE		25,424	0	0
Hershey Company	COM	427866108	331	2,468	SH		SOLE		2,468	0	0
Home Depot, Inc.	COM	437076102	989	4,757	SH		SOLE		4,757	0	0
IBM Corporation	COM	459200101	1,205	8,741	SH		SOLE		8,741	0	0
Illinois Tool Works Inc.	COM	452308109	812	5,386	SH		SOLE		5,386	0	0
Intel Corporation	COM	458140100	549	11,462	SH		SOLE		11,462	0	0
J. M. Smucker Company	COM	832696405	680	5,903	SH		SOLE		5,903	0	0
Johnson & Johnson	COM	478160104	2,264	16,254	SH		SOLE		16,254	0	0
Johnson Controls International	COM	G51502105	437	10,571	SH		SOLE		10,571	0	0
JPMorgan Chase & Co.	COM	46625H100	6,120	54,739	SH		SOLE		54,739	0	0
Laboratory Corporation of Amer	COM	50540R409	406	2,349	SH		SOLE		2,349	0	0
Lockheed Martin Corporation	COM	539830109	308	848	SH		SOLE		848	0	0
Loews Corporation	COM	540424108	492	9,000	SH		SOLE		9,000	0	0
McCormick & Co., Inc. Non-Voti	COM	579780206	1,240	8,000	SH		SOLE		8,000	0	0
McDonald's Corporation	COM	580135101	949	4,569	SH		SOLE		4,569	0	0
Merck & Co., Inc.	COM	58933y105	551	6,573	SH		SOLE		6,573	0	0
Microsoft Corporation	COM	594918104	17,845	133,215	SH		SOLE		133,215	0	0
MSCI Inc.	COM	55354G100	6,597	27,626	SH		SOLE		27,626	0	0
Netflix, Inc.	COM	64110l106	371	1,010	SH		SOLE		1,010	0	0
Oracle Corporation	COM	68389X105	319	5,597	SH		SOLE		5,597	0	0
PepsiCo, Inc.	COM	713448108	1,453	11,080	SH		SOLE		11,080	0	0
Pfizer Inc.	COM	717081103	868	20,034	SH		SOLE		20,034	0	0
Procter & Gamble Company	COM	742718109	70,468	642,659	SH		SOLE		642,659	0	0
Progressive Corporation	COM	743315103	490	6,132	SH		SOLE		6,132	0	0
S&P Global, Inc.	COM	78409v104	2,221	9,750	SH		SOLE		9,750	0	0
Schlumberger NV	COM	806857108	2,293	57,694	SH		SOLE		57,694	0	0
Stryker Corporation	COM	863667101	617	3,000	SH		SOLE		3,000	0	0
Sysco Corporation	COM	871829107	219	3,090	SH		SOLE		3,090	0	0
Thermo Fisher Scientific Inc	COM	883556102	9,809	33,400	SH		SOLE		33,400	0	0
Union Pacific Corporation	COM	907818108	584	3,453	SH		SOLE		3,453	0	0
United Technologies Corporatio	COM	913017109	295	2,265	SH		SOLE		2,265	0	0
Verisk Analytics Inc	COM	92345Y106	6,907	47,162	SH		SOLE		47,162	0	0
Visa Inc. Class A	COM	92826c839	15,714	90,545	SH		SOLE		90,545	0	0
Wal-Mart Stores, Inc.	COM	931142103	855	7,737	SH		SOLE		7,737	0	0
Walt Disney Company	COM	254687106	758	5,428	SH		SOLE		5,428	0	0
Wells Fargo & Company	COM	949746101	359	7,584	SH		SOLE		7,584	0	0
Columbia Emerging Markets Cons	COM	19762B509	221	9,691	SH		SOLE		9,691	0	0
First Trust Morningstar Divide	COM	336917109	361	11,773	SH		SOLE		11,773	0	0
Invesco FTSE RAFI US 1000 Port	COM	46137V613	17,041	146,098	SH		SOLE		146,098	0	0
iShares Core MSCI EAFE ETF	COM	46432F842	48,053	782,618	SH		SOLE		782,618	0	0
iShares Core MSCI Total Intern	COM	46432F834	276	4,703	SH		SOLE		4,703	0	0
iShares Core S&P 500 ETF	COM	464287200	864	2,931	SH		SOLE		2,931	0	0
iShares Core S&P Small Cap ETF	COM	464287804	12,699	162,227	SH		SOLE		162,227	0	0
iShares Edge MSCI Min Vol USA	COM	46429b697	24,009	388,934	SH		SOLE		388,934	0	0
iShares Edge MSCI USA Momentum	COM	46432F396	23,513	198,256	SH		SOLE		198,256	0	0
iShares Edge MSCI USA Quality	COM	46432f339	23,608	258,091	SH		SOLE		258,091	0	0
iShares MSCI ACWI ex U.S. ETF	COM	464288240	564	12,052	SH		SOLE		12,052	0	0
iShares MSCI Emerging Markets	COM	464287234	221	5,144	SH		SOLE		5,144	0	0
iShares MSCI Global Impact ETF	COM	46435G532	926	16,057	SH		SOLE		16,057	0	0
iShares MSCI USA ESG Select ET	COM	464288802	380	3,119	SH		SOLE		3,119	0	0
iShares Russell 1000 ETF	COM	464287622	893	5,485	SH		SOLE		5,485	0	0
iShares Russell 1000 Growth ET	COM	464287614	2,985	18,969	SH		SOLE		18,969	0	0
iShares Russell 1000 Value ETF	COM	464287598	2,115	16,624	SH		SOLE		16,624	0	0
iShares Russell 2000 ETF	COM	464287655	663	4,263	SH		SOLE		4,263	0	0
iShares Russell 2000 Growth In	COM	464287648	342	1,701	SH		SOLE		1,701	0	0
iShares Russell Midcap ETF	COM	464287499	816	14,613	SH		SOLE		14,613	0	0
iShares S&P 100 ETF	COM	464287101	584	4,504	SH		SOLE		4,504	0	0
iShares S&P 500 Growth ETF	COM	464287309	27,286	152,233	SH		SOLE		152,233	0	0
SPDR S&P 500 ETF Trust	COM	78462F103	99,391	339,219	SH		SOLE		339,219	0	0
Technology Select Sector SPDR	COM	81369Y803	2,189	28,044	SH		SOLE		28,044	0	0
Vanguard Dividend Appreciation	COM	921908844	495	4,302	SH		SOLE		4,302	0	0
Vanguard FTSE Developed Market	COM	921943858	1,809	43,377	SH		SOLE		43,377	0	0
Vanguard FTSE Emerging Markets	COM	922042858	642	15,086	SH		SOLE		15,086	0	0
Vanguard International Dividen	COM	921946810	224	3,286	SH		SOLE		3,286	0	0
Vanguard S&P 500 Index Fund	COM	922908363	1,721	6,393	SH		SOLE		6,393	0	0
Vanguard Total Stock Market In	COM	922908769	12,692	84,563	SH		SOLE		84,563	0	0