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
SPDR Gold Trust	COM	78463V107	451	3,795	SH		SOLE		3,795	0	0
Sprott Physical Gold Trust Uni	COM	85207H104	842	82,387	SH		SOLE		82,387	0	0
Sprott Physical Silver Trust	COM	85207K107	101	14,670	SH		SOLE		14,670	0	0
JPMorgan Hedged Equity Select	COM	46637K281	69,648	3,882,265	SH		SOLE		3,882,265	0	0
Tocqueville Gold Fund	COM	888894862	417	11,225	SH		SOLE		11,225	0	0
3M Company	COM	88579Y101	613	3,204	SH		SOLE		3,204	0	0
Abbott Laboratories	COM	002824100	497	11,180	SH		SOLE		11,180	0	0
AbbVie, Inc.	COM	00287y109	444	6,812	SH		SOLE		6,812	0	0
Agnico-Eagle Mines Limited	COM	008474108	234	5,509	SH		SOLE		5,509	0	0
Air Products and Chemicals, In	COM	009158106	325	2,400	SH		SOLE		2,400	0	0
Allegheny Technologies Incorpo	COM	01741R102	188	10,494	SH		SOLE		10,494	0	0
Alphabet Inc. Class A	COM	02079K305	564	665	SH		SOLE		665	0	0
Alphabet Inc. Class C	COM	02079K107	1,278	1,541	SH		SOLE		1,541	0	0
American Express Company	COM	025816109	945	11,945	SH		SOLE		11,945	0	0
Apple Inc.	COM	037833100	2,551	17,756	SH		SOLE		17,756	0	0
Armstrong World Industries, In	COM	04247X102	230	5,000	SH		SOLE		5,000	0	0
AT&T Inc.	COM	00206R102	723	17,401	SH		SOLE		17,401	0	0
Automatic Data Processing, Inc	COM	053015103	342	3,338	SH		SOLE		3,338	0	0
Baker Hughes Incorporated	COM	057224107	449	7,500	SH		SOLE		7,500	0	0
Berkshire Hathaway, Inc. Cl. A	COM	084670108	17,989	72	SH		SOLE		72	0	0
Berkshire Hathaway, Inc. Cl. B	COM	084670702	28,595	171,554	SH		SOLE		171,554	0	0
Boeing Company	COM	097023105	9,411	53,210	SH		SOLE		53,210	0	0
Bristol-Myers Squibb Company	COM	110122108	580	10,670	SH		SOLE		10,670	0	0
Carnival Corporation	COM	143658300	4,867	82,611	SH		SOLE		82,611	0	0
Chevron Corporation	COM	166764100	267	2,488	SH		SOLE		2,488	0	0
Cisco Systems, Inc.	COM	17275R102	521	15,400	SH		SOLE		15,400	0	0
Coca-Cola Company	COM	191216100	2,605	61,391	SH		SOLE		61,391	0	0
Colgate-Palmolive Company	COM	194162103	793	10,834	SH		SOLE		10,834	0	0
Donaldson Company, Inc.	COM	257651109	273	6,000	SH		SOLE		6,000	0	0
Dycom Industries, Inc.	COM	267475101	461	4,962	SH		SOLE		4,962	0	0
Eli Lilly and Company	COM	532457108	1,581	18,796	SH		SOLE		18,796	0	0
Enterprise Bancorp, Inc.	COM	293668109	1,088	31,306	SH		SOLE		31,306	0	0
Exxon Mobil Corporation	COM	30231G102	1,564	19,074	SH		SOLE		19,074	0	0
FedEx Corporation	COM	31428X106	531	2,720	SH		SOLE		2,720	0	0
General Electric Company	COM	369604103	1,668	55,958	SH		SOLE		55,958	0	0
Hecla Mining Company	COM	422704106	291	55,000	SH		SOLE		55,000	0	0
Hershey Company	COM	427866108	284	2,600	SH		SOLE		2,600	0	0
Home Depot, Inc.	COM	437076102	643	4,380	SH		SOLE		4,380	0	0
IBM Corporation	COM	459200101	1,605	9,216	SH		SOLE		9,216	0	0
Illinois Tool Works Inc.	COM	452308109	768	5,796	SH		SOLE		5,796	0	0
Intel Corporation	COM	458140100	271	7,500	SH		SOLE		7,500	0	0
J. M. Smucker Company	COM	832696405	761	5,803	SH		SOLE		5,803	0	0
Johnson & Johnson	COM	478160104	2,175	17,460	SH		SOLE		17,460	0	0
Johnson Controls International	COM	G51502105	982	23,314	SH		SOLE		23,314	0	0
JPMorgan Chase & Co.	COM	46625H100	5,447	62,008	SH		SOLE		62,008	0	0
Kayne Anderson Midstream/Energ	COM	48661E108	165	10,000	SH		SOLE		10,000	0	0
Laboratory Corporation of Amer	COM	50540R409	642	4,477	SH		SOLE		4,477	0	0
LKQ Corporation	COM	501889208	469	16,030	SH		SOLE		16,030	0	0
Lockheed Martin Corporation	COM	539830109	454	1,697	SH		SOLE		1,697	0	0
Loews Corporation	COM	540424108	421	9,000	SH		SOLE		9,000	0	0
McCormick & Co., Inc. Non-Voti	COM	579780206	780	8,000	SH		SOLE		8,000	0	0
McDonald's Corporation	COM	580135101	950	7,327	SH		SOLE		7,327	0	0
Merck & Co., Inc.	COM	58933y105	4,961	78,079	SH		SOLE		78,079	0	0
Microsoft Corporation	COM	594918104	9,908	150,436	SH		SOLE		150,436	0	0
Oracle Corporation	COM	68389X105	481	10,790	SH		SOLE		10,790	0	0
Packaging Corporation of Ameri	COM	695156109	394	4,305	SH		SOLE		4,305	0	0
Pentair plc	COM	G7S00T104	4,614	73,488	SH		SOLE		73,488	0	0
PepsiCo, Inc.	COM	713448108	1,689	15,096	SH		SOLE		15,096	0	0
Pfizer Inc.	COM	717081103	702	20,520	SH		SOLE		20,520	0	0
Procter & Gamble Company	COM	742718109	67,033	746,053	SH		SOLE		746,053	0	0
Progressive Corporation	COM	743315103	240	6,132	SH		SOLE		6,132	0	0
Rayonier Inc.	COM	754907103	204	7,200	SH		SOLE		7,200	0	0
Rolls-Royce Holdings PLC Spons	COM	775781206	332	35,000	SH		SOLE		35,000	0	0
S&P Global, Inc.	COM	78409v104	1,275	9,750	SH		SOLE		9,750	0	0
Schlumberger NV	COM	806857108	9,913	126,928	SH		SOLE		126,928	0	0
Stryker Corporation	COM	863667101	395	3,000	SH		SOLE		3,000	0	0
Thor Industries, Inc.	COM	885160101	447	4,655	SH		SOLE		4,655	0	0
Union Pacific Corporation	COM	907818108	436	4,120	SH		SOLE		4,120	0	0
United Technologies Corporatio	COM	913017109	385	3,432	SH		SOLE		3,432	0	0
Verizon Communications Inc.	COM	92343v104	4,386	89,968	SH		SOLE		89,968	0	0
Visa Inc. Class A	COM	92826c839	8,443	95,005	SH		SOLE		95,005	0	0
Wal-Mart Stores, Inc.	COM	931142103	849	11,776	SH		SOLE		11,776	0	0
Walgreens Boots Alliance Inc	COM	931427108	398	4,792	SH		SOLE		4,792	0	0
Walt Disney Company	COM	254687106	771	6,798	SH		SOLE		6,798	0	0
Wells Fargo & Company	COM	949746101	14,232	255,703	SH		SOLE		255,703	0	0
Columbia Emerging Markets Cons	COM	19762B509	4,482	180,593	SH		SOLE		180,593	0	0
First Trust Morningstar Divide	COM	336917109	1,246	43,241	SH		SOLE		43,241	0	0
iShares Core MSCI EAFE ETF	COM	46432F842	35,262	608,491	SH		SOLE		608,491	0	0
iShares Core S&P Mid-Cap ETF	COM	464287507	390	2,275	SH		SOLE		2,275	0	0
iShares Core S&P Small Cap ETF	COM	464287804	13,254	191,643	SH		SOLE		191,643	0	0
iShares Edge MSCI Min Vol USA	COM	46429b697	20,743	434,689	SH		SOLE		434,689	0	0
iShares Edge MSCI USA Momentum	COM	46432F396	19,022	230,154	SH		SOLE		230,154	0	0
iShares Edge MSCI USA Quality	COM	46432f339	21,649	297,377	SH		SOLE		297,377	0	0
iShares MSCI EAFE ETF	COM	464287465	609	9,771	SH		SOLE		9,771	0	0
iShares MSCI Emerging Markets	COM	464287234	204	5,180	SH		SOLE		5,180	0	0
iShares MSCI USA ESG Select ET	COM	464288802	403	4,100	SH		SOLE		4,100	0	0
iShares Russell 1000 ETF	COM	464287622	925	7,045	SH		SOLE		7,045	0	0
iShares Russell 1000 Growth ET	COM	464287614	2,950	25,920	SH		SOLE		25,920	0	0
iShares Russell 1000 Value ETF	COM	464287598	2,565	22,316	SH		SOLE		22,316	0	0
iShares Russell 2000 ETF	COM	464287655	1,676	12,191	SH		SOLE		12,191	0	0
iShares Russell Midcap ETF	COM	464287499	1,723	9,203	SH		SOLE		9,203	0	0
iShares S&P 100 ETF	COM	464287101	410	3,919	SH		SOLE		3,919	0	0
PowerShares FTSE RAFI Develope	COM	73936T789	243	6,055	SH		SOLE		6,055	0	0
PowerShares FTSE RAFI US 1000	COM	73935x583	17,968	175,348	SH		SOLE		175,348	0	0
SPDR S&P 500 ETF Trust	COM	78462F103	79,892	338,900	SH		SOLE		338,900	0	0
SPDR S&P Midcap 400 ETF Trust	COM	78467y107	859	2,749	SH		SOLE		2,749	0	0
Technology Select Sector SPDR	COM	81369Y803	1,559	29,250	SH		SOLE		29,250	0	0
Vanguard Dividend Appreciation	COM	921908844	570	6,340	SH		SOLE		6,340	0	0
Vanguard Energy ETF	COM	92204a306	234	2,417	SH		SOLE		2,417	0	0
Vanguard FTSE Developed Market	COM	921943858	2,360	60,044	SH		SOLE		60,044	0	0
Vanguard FTSE Emerging Markets	COM	922042858	827	20,814	SH		SOLE		20,814	0	0
Vanguard REIT Index ETF	COM	922908553	223	2,700	SH		SOLE		2,700	0	0
Vanguard S&P 500 Index Fund	COM	922908363	2,319	10,720	SH		SOLE		10,720	0	0
Vanguard Total Stock Market In	COM	922908769	11,215	92,438	SH		SOLE		92,438	0	0
WisdomTree Europe Hedged Equit	COM	97717x701	207	3,300	SH		SOLE		3,300	0	0
WisdomTree High Dividend ETF	COM	97717W208	1,158	16,919	SH		SOLE		16,919	0	0