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
J.P. Morgan Alerian MLP Index	COM	46625H365	7,553	239,768	SH		SOLE		239,768	0	0
SPDR Gold Trust	COM	78463V107	477	3,795	SH		SOLE		3,795	0	0
Sprott Physical Gold Trust Uni	COM	85207H104	902	82,387	SH		SOLE		82,387	0	0
Sprott Physical Silver Trust	COM	85207K107	108	14,670	SH		SOLE		14,670	0	0
AQR Managed Futures Strategy	COM	00203H859	16,325	1,611,540	SH		SOLE		1,611,540	0	0
JPMorgan Hedged Equity Select	COM	46637K281	20,777	1,241,904	SH		SOLE		1,241,904	0	0
Tocqueville Gold Fund	COM	888894862	478	11,225	SH		SOLE		11,225	0	0
Tortoise MLP & Pipeline Instl	COM	56166Y404	16,960	1,216,665	SH		SOLE		1,216,665	0	0
3M Company	COM	88579Y101	581	3,294	SH		SOLE		3,294	0	0
Abbott Laboratories	COM	002824100	487	11,510	SH		SOLE		11,510	0	0
AbbVie, Inc.	COM	00287y109	430	6,812	SH		SOLE		6,812	0	0
Agnico-Eagle Mines Limited	COM	008474108	298	5,509	SH		SOLE		5,509	0	0
Air Products and Chemicals, In	COM	009158106	361	2,400	SH		SOLE		2,400	0	0
Allegheny Technologies Incorpo	COM	01741R102	211	11,700	SH		SOLE		11,700	0	0
Alphabet Inc. Class A	COM	02079K305	535	665	SH		SOLE		665	0	0
Alphabet Inc. Class C	COM	02079K107	1,198	1,541	SH		SOLE		1,541	0	0
Amarin Corporation Plc Sponsor	COM	023111206	32	10,000	SH		SOLE		10,000	0	0
American Express Company	COM	025816109	787	12,285	SH		SOLE		12,285	0	0
Amgen Inc.	COM	031162100	4,182	25,068	SH		SOLE		25,068	0	0
Apple Inc.	COM	037833100	2,071	18,321	SH		SOLE		18,321	0	0
ARIAD Pharmaceuticals, Inc.	COM	04033A100	138	10,100	SH		SOLE		10,100	0	0
Armstrong World Industries, In	COM	04247X102	207	5,000	SH		SOLE		5,000	0	0
AT&T Inc.	COM	00206R102	578	14,221	SH		SOLE		14,221	0	0
Automatic Data Processing, Inc	COM	053015103	294	3,338	SH		SOLE		3,338	0	0
Baker Hughes Incorporated	COM	057224107	379	7,500	SH		SOLE		7,500	0	0
Berkshire Hathaway, Inc. Cl. A	COM	084670108	15,568	72	SH		SOLE		72	0	0
Berkshire Hathaway, Inc. Cl. B	COM	084670702	27,964	193,563	SH		SOLE		193,563	0	0
Bristol-Myers Squibb Company	COM	110122108	575	10,670	SH		SOLE		10,670	0	0
Carnival Corporation	COM	143658300	4,016	82,260	SH		SOLE		82,260	0	0
Chevron Corporation	COM	166764100	562	5,458	SH		SOLE		5,458	0	0
Cisco Systems, Inc.	COM	17275R102	520	16,400	SH		SOLE		16,400	0	0
Coca-Cola Company	COM	191216100	2,611	61,701	SH		SOLE		61,701	0	0
Colgate-Palmolive Company	COM	194162103	803	10,834	SH		SOLE		10,834	0	0
CVS Health Corporation	COM	126650100	4,172	46,887	SH		SOLE		46,887	0	0
DaVita Inc.	COM	23918k108	3,576	54,126	SH		SOLE		54,126	0	0
Dollar General Corporation	COM	256677105	217	3,102	SH		SOLE		3,102	0	0
Donaldson Company, Inc.	COM	257651109	224	6,000	SH		SOLE		6,000	0	0
Dycom Industries, Inc.	COM	267475101	463	5,662	SH		SOLE		5,662	0	0
EGShares Emerging Markets Cons	COM	268461779	4,404	177,380	SH		SOLE		177,380	0	0
Eli Lilly and Company	COM	532457108	1,529	19,046	SH		SOLE		19,046	0	0
Enterprise Bancorp, Inc.	COM	293668109	877	31,306	SH		SOLE		31,306	0	0
Exxon Mobil Corporation	COM	30231G102	5,300	60,722	SH		SOLE		60,722	0	0
FedEx Corporation	COM	31428X106	587	3,360	SH		SOLE		3,360	0	0
First Trust Morningstar Divide	COM	336917109	1,263	46,308	SH		SOLE		46,308	0	0
General Electric Company	COM	369604103	1,668	56,308	SH		SOLE		56,308	0	0
Hecla Mining Company	COM	422704106	313	55,000	SH		SOLE		55,000	0	0
Hershey Company	COM	427866108	249	2,600	SH		SOLE		2,600	0	0
Home Depot, Inc.	COM	437076102	564	4,380	SH		SOLE		4,380	0	0
IBM Corporation	COM	459200101	1,483	9,338	SH		SOLE		9,338	0	0
Illinois Tool Works Inc.	COM	452308109	695	5,796	SH		SOLE		5,796	0	0
Intel Corporation	COM	458140100	283	7,500	SH		SOLE		7,500	0	0
iShares Core MSCI EAFE ETF	COM	46432F842	30,300	549,511	SH		SOLE		549,511	0	0
iShares Core S&P Mid-Cap ETF	COM	464287507	352	2,275	SH		SOLE		2,275	0	0
iShares Edge MSCI Min Vol USA	COM	46429b697	11,446	251,953	SH		SOLE		251,953	0	0
iShares Edge MSCI USA Quality	COM	46432f339	11,405	168,984	SH		SOLE		168,984	0	0
iShares MSCI EAFE ETF	COM	464287465	2,321	39,256	SH		SOLE		39,256	0	0
iShares MSCI Emerging Markets	COM	464287234	368	9,833	SH		SOLE		9,833	0	0
iShares MSCI USA ESG Select ET	COM	464288802	361	3,965	SH		SOLE		3,965	0	0
iShares Russell 1000 ETF	COM	464287622	849	7,045	SH		SOLE		7,045	0	0
iShares Russell 1000 Growth ET	COM	464287614	2,973	28,540	SH		SOLE		28,540	0	0
iShares Russell 1000 Value ETF	COM	464287598	2,510	23,766	SH		SOLE		23,766	0	0
iShares Russell 2000 ETF	COM	464287655	1,539	12,391	SH		SOLE		12,391	0	0
iShares Russell Midcap ETF	COM	464287499	1,639	9,403	SH		SOLE		9,403	0	0
iShares S&P 100 ETF	COM	464287101	376	3,919	SH		SOLE		3,919	0	0
Johnson & Johnson	COM	478160104	2,174	18,400	SH		SOLE		18,400	0	0
Johnson Controls International	COM	G51502105	1,085	23,314	SH		SOLE		23,314	0	0
JPMorgan Chase & Co.	COM	46625H100	4,601	69,095	SH		SOLE		69,095	0	0
Kayne Anderson Midstream/Energ	COM	48661E108	158	10,000	SH		SOLE		10,000	0	0
Laboratory Corporation of Amer	COM	50540R409	647	4,707	SH		SOLE		4,707	0	0
LKQ Corporation	COM	501889208	568	16,030	SH		SOLE		16,030	0	0
Lockheed Martin Corporation	COM	539830109	407	1,697	SH		SOLE		1,697	0	0
Loews Corporation	COM	540424108	370	9,000	SH		SOLE		9,000	0	0
McCormick & Co., Inc. Non-Voti	COM	579780206	799	8,000	SH		SOLE		8,000	0	0
McDonald's Corporation	COM	580135101	871	7,547	SH		SOLE		7,547	0	0
McKesson Corporation	COM	58155Q103	3,409	20,445	SH		SOLE		20,445	0	0
Merck & Co., Inc.	COM	58933y105	4,783	76,642	SH		SOLE		76,642	0	0
Microsoft Corporation	COM	594918104	5,900	102,426	SH		SOLE		102,426	0	0
Mobile Mini, Inc.	COM	60740f105	317	10,503	SH		SOLE		10,503	0	0
New Gold Inc.	COM	644535106	43	10,000	SH		SOLE		10,000	0	0
Occidental Petroleum Corporati	COM	674599105	3,398	46,600	SH		SOLE		46,600	0	0
Oracle Corporation	COM	68389X105	8,451	215,159	SH		SOLE		215,159	0	0
Packaging Corporation of Ameri	COM	695156109	350	4,305	SH		SOLE		4,305	0	0
Pentair plc	COM	G7S00T104	4,682	72,887	SH		SOLE		72,887	0	0
PepsiCo, Inc.	COM	713448108	1,653	15,196	SH		SOLE		15,196	0	0
Pfizer Inc.	COM	717081103	695	20,520	SH		SOLE		20,520	0	0
PowerShares FTSE RAFI Develope	COM	73936T789	218	5,925	SH		SOLE		5,925	0	0
PowerShares FTSE RAFI US 1000	COM	73935x583	11,433	122,145	SH		SOLE		122,145	0	0
Procter & Gamble Company	COM	742718109	39,192	436,679	SH		SOLE		436,679	0	0
Rolls-Royce Holdings PLC Spons	COM	775781206	326	35,000	SH		SOLE		35,000	0	0
S&P Global, Inc.	COM	78409v104	1,234	9,750	SH		SOLE		9,750	0	0
Schlumberger NV	COM	806857108	10,231	130,103	SH		SOLE		130,103	0	0
SPDR S&P 500 ETF Trust	COM	78462F103	69,953	323,406	SH		SOLE		323,406	0	0
SPDR S&P Midcap 400 ETF Trust	COM	78467y107	783	2,774	SH		SOLE		2,774	0	0
Stryker Corporation	COM	863667101	349	3,000	SH		SOLE		3,000	0	0
Technology Select Sector SPDR	COM	81369Y803	1,398	29,250	SH		SOLE		29,250	0	0
Thor Industries, Inc.	COM	885160101	394	4,655	SH		SOLE		4,655	0	0
TreeHouse Foods, Inc.	COM	89469A104	202	2,316	SH		SOLE		2,316	0	0
Union Pacific Corporation	COM	907818108	402	4,120	SH		SOLE		4,120	0	0
United Technologies Corporatio	COM	913017109	392	3,862	SH		SOLE		3,862	0	0
Vanguard Dividend Appreciation	COM	921908844	13,455	160,309	SH		SOLE		160,309	0	0
Vanguard FTSE Developed Market	COM	921943858	2,036	54,414	SH		SOLE		54,414	0	0
Vanguard FTSE Emerging Markets	COM	922042858	557	14,800	SH		SOLE		14,800	0	0
Vanguard FTSE Europe ETF	COM	922042874	314	6,440	SH		SOLE		6,440	0	0
Vanguard REIT Index ETF	COM	922908553	234	2,700	SH		SOLE		2,700	0	0
Vanguard S&P 500 Index Fund	COM	922908363	2,358	11,867	SH		SOLE		11,867	0	0
Vanguard Total Stock Market In	COM	922908769	10,286	92,390	SH		SOLE		92,390	0	0
Verizon Communications Inc.	COM	92343v104	4,345	83,588	SH		SOLE		83,588	0	0
Visa Inc. Class A	COM	92826c839	4,556	55,090	SH		SOLE		55,090	0	0
Wal-Mart Stores, Inc.	COM	931142103	849	11,776	SH		SOLE		11,776	0	0
Walgreens Boots Alliance Inc	COM	931427108	425	5,272	SH		SOLE		5,272	0	0
Walt Disney Company	COM	254687106	520	5,598	SH		SOLE		5,598	0	0
Wells Fargo & Company	COM	949746101	11,295	255,085	SH		SOLE		255,085	0	0
WisdomTree High Dividend ETF	COM	97717W208	1,204	18,116	SH		SOLE		18,116	0	0
WisdomTree International Large	COM	97717w794	362	8,371	SH		SOLE		8,371	0	0