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	804	76,917	SH		SOLE		76,917	0	0
Sprott Physical Silver Trust	COM	85207K107	81	14,670	SH		SOLE		14,670	0	0
Xtrackers MSCI All World ex US	COM	233051820	588	21,658	SH		SOLE		21,658	0	0
JPMorgan Hedged Equity Select	COM	46637K281	73,009	3,711,693	SH		SOLE		3,711,693	0	0
Tocqueville Gold Fund	COM	888894862	330	10,124	SH		SOLE		10,124	0	0
3M Company	COM	88579Y101	637	3,066	SH		SOLE		3,066	0	0
Abbott Laboratories	COM	002824100	911	11,397	SH		SOLE		11,397	0	0
AbbVie, Inc.	COM	00287y109	470	5,828	SH		SOLE		5,828	0	0
Air Products and Chemicals, In	COM	009158106	458	2,400	SH		SOLE		2,400	0	0
Alibaba Group Holding Ltd. Spo	COM	01609W102	213	1,170	SH		SOLE		1,170	0	0
Alphabet Inc. Class A	COM	02079K305	1,049	891	SH		SOLE		891	0	0
Alphabet Inc. Class C	COM	02079K107	1,923	1,639	SH		SOLE		1,639	0	0
Amazon.com, Inc.	COM	023135106	459	258	SH		SOLE		258	0	0
American Express Company	COM	025816109	1,077	9,854	SH		SOLE		9,854	0	0
Amphenol Corporation Class A	COM	032095101	4,688	49,640	SH		SOLE		49,640	0	0
Apple Inc.	COM	037833100	3,385	17,818	SH		SOLE		17,818	0	0
AT&T Inc.	COM	00206R102	546	17,401	SH		SOLE		17,401	0	0
Automatic Data Processing, Inc	COM	053015103	487	3,048	SH		SOLE		3,048	0	0
Becton Dickinson & Company	COM	075887109	10,446	41,829	SH		SOLE		41,829	0	0
Berkshire Hathaway, Inc. Cl. A	COM	084670108	16,567	55	SH		SOLE		55	0	0
Berkshire Hathaway, Inc. Cl. B	COM	084670702	22,832	113,654	SH		SOLE		113,654	0	0
BlackRock Inc.	COM	09247X101	244	572	SH		SOLE		572	0	0
Boeing Company	COM	097023105	20,598	54,003	SH		SOLE		54,003	0	0
Bristol-Myers Squibb Company	COM	110122108	505	10,595	SH		SOLE		10,595	0	0
Cisco Systems, Inc.	COM	17275R102	959	17,754	SH		SOLE		17,754	0	0
Coca-Cola Company	COM	191216100	2,469	52,684	SH		SOLE		52,684	0	0
Colgate-Palmolive Company	COM	194162103	743	10,834	SH		SOLE		10,834	0	0
Donaldson Company, Inc.	COM	257651109	300	6,000	SH		SOLE		6,000	0	0
Eli Lilly and Company	COM	532457108	746	5,748	SH		SOLE		5,748	0	0
Enterprise Bancorp, Inc.	COM	293668109	899	31,306	SH		SOLE		31,306	0	0
Exxon Mobil Corporation	COM	30231G102	752	9,303	SH		SOLE		9,303	0	0
General Electric Company	COM	369604103	320	31,999	SH		SOLE		31,999	0	0
Hershey Company	COM	427866108	283	2,468	SH		SOLE		2,468	0	0
Home Depot, Inc.	COM	437076102	913	4,757	SH		SOLE		4,757	0	0
IBM Corporation	COM	459200101	1,233	8,741	SH		SOLE		8,741	0	0
Illinois Tool Works Inc.	COM	452308109	774	5,396	SH		SOLE		5,396	0	0
Intel Corporation	COM	458140100	616	11,462	SH		SOLE		11,462	0	0
J. M. Smucker Company	COM	832696405	688	5,903	SH		SOLE		5,903	0	0
Johnson & Johnson	COM	478160104	2,292	16,399	SH		SOLE		16,399	0	0
Johnson Controls International	COM	G51502105	390	10,571	SH		SOLE		10,571	0	0
JPMorgan Chase & Co.	COM	46625H100	5,536	54,691	SH		SOLE		54,691	0	0
Laboratory Corporation of Amer	COM	50540R409	359	2,349	SH		SOLE		2,349	0	0
Lockheed Martin Corporation	COM	539830109	255	848	SH		SOLE		848	0	0
Loews Corporation	COM	540424108	431	9,000	SH		SOLE		9,000	0	0
McCormick & Co., Inc. Non-Voti	COM	579780206	1,205	8,000	SH		SOLE		8,000	0	0
McDonald's Corporation	COM	580135101	869	4,577	SH		SOLE		4,577	0	0
Merck & Co., Inc.	COM	58933y105	547	6,573	SH		SOLE		6,573	0	0
Microsoft Corporation	COM	594918104	15,743	133,484	SH		SOLE		133,484	0	0
MSCI Inc.	COM	55354G100	5,426	27,287	SH		SOLE		27,287	0	0
Netflix, Inc.	COM	64110l106	360	1,010	SH		SOLE		1,010	0	0
Oracle Corporation	COM	68389X105	301	5,597	SH		SOLE		5,597	0	0
PepsiCo, Inc.	COM	713448108	1,359	11,088	SH		SOLE		11,088	0	0
Pfizer Inc.	COM	717081103	851	20,034	SH		SOLE		20,034	0	0
Procter & Gamble Company	COM	742718109	67,017	644,084	SH		SOLE		644,084	0	0
Progressive Corporation	COM	743315103	442	6,132	SH		SOLE		6,132	0	0
S&P Global, Inc.	COM	78409v104	2,053	9,750	SH		SOLE		9,750	0	0
Schlumberger NV	COM	806857108	2,537	58,217	SH		SOLE		58,217	0	0
Stryker Corporation	COM	863667101	594	3,008	SH		SOLE		3,008	0	0
Sysco Corporation	COM	871829107	206	3,090	SH		SOLE		3,090	0	0
Thermo Fisher Scientific Inc	COM	883556102	8,965	32,751	SH		SOLE		32,751	0	0
Union Pacific Corporation	COM	907818108	577	3,453	SH		SOLE		3,453	0	0
United Technologies Corporatio	COM	913017109	294	2,278	SH		SOLE		2,278	0	0
Verizon Communications Inc.	COM	92343v104	259	4,378	SH		SOLE		4,378	0	0
Visa Inc. Class A	COM	92826c839	14,153	90,617	SH		SOLE		90,617	0	0
Wal-Mart Stores, Inc.	COM	931142103	755	7,737	SH		SOLE		7,737	0	0
Walt Disney Company	COM	254687106	604	5,438	SH		SOLE		5,438	0	0
Wells Fargo & Company	COM	949746101	495	10,254	SH		SOLE		10,254	0	0
Columbia Emerging Markets Cons	COM	19762B509	222	9,812	SH		SOLE		9,812	0	0
First Trust Morningstar Divide	COM	336917109	355	11,773	SH		SOLE		11,773	0	0
Invesco FTSE RAFI US 1000 Port	COM	46137V613	19,105	168,521	SH		SOLE		168,521	0	0
iShares Core MSCI EAFE ETF	COM	46432F842	47,425	780,401	SH		SOLE		780,401	0	0
iShares Core MSCI Total Intern	COM	46432F834	273	4,703	SH		SOLE		4,703	0	0
iShares Core S&P 500 ETF	COM	464287200	834	2,931	SH		SOLE		2,931	0	0
iShares Core S&P Small Cap ETF	COM	464287804	14,839	192,340	SH		SOLE		192,340	0	0
iShares Edge MSCI Min Vol USA	COM	46429b697	25,719	437,393	SH		SOLE		437,393	0	0
iShares Edge MSCI USA Momentum	COM	46432F396	25,248	225,068	SH		SOLE		225,068	0	0
iShares Edge MSCI USA Quality	COM	46432f339	25,664	289,822	SH		SOLE		289,822	0	0
iShares MSCI ACWI ex U.S. ETF	COM	464288240	560	12,107	SH		SOLE		12,107	0	0
iShares MSCI Emerging Markets	COM	464287234	221	5,144	SH		SOLE		5,144	0	0
iShares MSCI Global Impact ETF	COM	46435G532	947	16,057	SH		SOLE		16,057	0	0
iShares MSCI USA ESG Select ET	COM	464288802	369	3,119	SH		SOLE		3,119	0	0
iShares Russell 1000 ETF	COM	464287622	863	5,485	SH		SOLE		5,485	0	0
iShares Russell 1000 Growth ET	COM	464287614	2,543	16,799	SH		SOLE		16,799	0	0
iShares Russell 1000 Value ETF	COM	464287598	1,832	14,833	SH		SOLE		14,833	0	0
iShares Russell 2000 ETF	COM	464287655	650	4,243	SH		SOLE		4,243	0	0
iShares Russell 2000 Growth In	COM	464287648	335	1,701	SH		SOLE		1,701	0	0
iShares Russell Midcap ETF	COM	464287499	852	15,793	SH		SOLE		15,793	0	0
iShares S&P 100 ETF	COM	464287101	564	4,504	SH		SOLE		4,504	0	0
iShares S&P 500 Growth ETF	COM	464287309	26,130	151,599	SH		SOLE		151,599	0	0
SPDR S&P 500 ETF Trust	COM	78462F103	95,269	337,258	SH		SOLE		337,258	0	0
Technology Select Sector SPDR	COM	81369Y803	2,075	28,044	SH		SOLE		28,044	0	0
Vanguard Dividend Appreciation	COM	921908844	472	4,302	SH		SOLE		4,302	0	0
Vanguard FTSE Developed Market	COM	921943858	1,667	40,792	SH		SOLE		40,792	0	0
Vanguard FTSE Emerging Markets	COM	922042858	641	15,086	SH		SOLE		15,086	0	0
Vanguard International Dividen	COM	921946810	212	3,286	SH		SOLE		3,286	0	0
Vanguard S&P 500 Index Fund	COM	922908363	1,659	6,393	SH		SOLE		6,393	0	0
Vanguard Total Stock Market In	COM	922908769	12,208	84,359	SH		SOLE		84,359	0	0