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

OMB APPROVAL

OMB Number:		3235-0006
Expires:	Oct 31, 2018
Estimated average burden
hours per response:		23.8

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
3M	Common Stock	88579Y101	281	2,172	SH		SOLE		2,172	0	0
Abbott Laboratories	Common Stock	002824100	446	4,104	SH		SOLE		4,104	0	0
Abbvie Inc	Common Stock	00287Y109	527	3,441	SH		SOLE		3,441	0	0
Accenture PLC Ireland SHS Class A	Common Stock	G1151C101	16,234	58,470	SH		SOLE		58,470	0	0
Agilent Technologies, Inc.	Common Stock	00846U101	157	1,320	SH		SOLE		1,320	0	0
Air Products And Chemicals, Inc.	Common Stock	009158106	410	1,705	SH		SOLE		1,705	0	0
Alphabet Inc Cap STK CL A	Common Stock	02079K305	2,803	1,286	SH		SOLE		1,286	0	0
Alphabet Inc Cap STK CL C	Common Stock	02079K107	4,202	1,922	SH		SOLE		1,922	0	0
Amazon.Com Inc	Common Stock	023135106	17,829	167,860	SH		SOLE		167,860	0	0
American Express Co	Common Stock	025816109	22,176	159,974	SH		SOLE		159,974	0	0
Amphenol Corp Class A	Common Stock	032095101	20,014	310,879	SH		SOLE		310,879	0	0
Apple Inc	Common Stock	037833100	12,293	89,916	SH		SOLE		89,916	0	0
Automatic Data Processing, Inc.	Common Stock	053015103	281	1,338	SH		SOLE		1,338	0	0
Bank Of America Corporation	Common Stock	060505104	31	1,000	SH		SOLE		1,000	0	0
Becton Dickinson And Co	Common Stock	075887109	75	303	SH		SOLE		303	0	0
Berkshire Hathaway	Common Stock	084670108	2,045	5	SH		SOLE		5	0	0
Berkshire Hathaway Inc Del CL B New	Common Stock	084670702	21,678	79,401	SH		SOLE		79,401	0	0
BlackRock Inc	Common Stock	09247X101	336	552	SH		SOLE		552	0	0
Bristol-Myers Squibb Company	Common Stock	110122108	661	8,580	SH		SOLE		8,580	0	0
Caterpillar	Common Stock	149123101	129	724	SH		SOLE		724	0	0
Chevron Corp.	Common Stock	166764100	69	477	SH		SOLE		477	0	0
Chubb Limited	Common Stock	H1467J104	224	1,141	SH		SOLE		1,141	0	0
Cisco Systems	Common Stock	17275R102	311	7,285	SH		SOLE		7,285	0	0
Coca-Cola	Common Stock	191216100	2,083	33,111	SH		SOLE		33,111	0	0
Cold Snap Corp.	Common Stock	04622D9I4	567	98,285	SH		SOLE		98,285	0	0
Colgate-Palmolive Company	Common Stock	194162103	373	4,656	SH		SOLE		4,656	0	0
Costco Wholesale Corp	Common Stock	22160K105	22,667	47,295	SH		SOLE		47,295	0	0
Danaher Corp	Common Stock	235851102	345	1,360	SH		SOLE		1,360	0	0
Eli Lilly & Co. Com	Common Stock	532457108	990	3,053	SH		SOLE		3,053	0	0
Enterprise Bancorp, Inc.	Common Stock	293668109	1,008	31,306	SH		SOLE		31,306	0	0
ExxonMobil	Common Stock	30231G102	326	3,808	SH		SOLE		3,808	0	0
Financial Select Sector SPDR Fund	ETF	81369Y605	16,539	525,865	SH		SOLE		525,865	0	0
General Mills, Inc.	Common Stock	370334104	107	1,420	SH		SOLE		1,420	0	0
Heliogen Inc	Common Stock	42329E105	1,583	750,000	SH		SOLE		750,000	0	0
Henry Schein Inc Com	Common Stock	806407102	126	1,637	SH		SOLE		1,637	0	0
Hershey Company Com	Common Stock	427866108	277	1,288	SH		SOLE		1,288	0	0
IBM	Common Stock	459200101	194	1,372	SH		SOLE		1,372	0	0
Industrial Select Sector SPDR Fund	ETF	81369Y704	16,361	187,321	SH		SOLE		187,321	0	0
Intel	Common Stock	458140100	307	8,200	SH		SOLE		8,200	0	0
Invesco ETF TR FTSE Rafi 1000	ETF	46137V613	27	183	SH		SOLE		183	0	0
iShares Broad USD High Yield ETF	ETF	46435U853	202	5,821	SH		SOLE		5,821	0	0
iShares Core MSCI EAFE ETF	ETF	46432F842	49,861	847,258	SH		SOLE		847,258	0	0
iShares Core S&P 500 ETF	ETF	464287200	1,023	2,697	SH		SOLE		2,697	0	0
iShares Core S&P Small Cap ETF Fund	ETF	464287804	310	3,350	SH		SOLE		3,350	0	0
iShares MSCI USA Minimum Volatility	ETF	46429B697	1,242	17,683	SH		SOLE		17,683	0	0
iShares MSCI USA Quality Factor	ETF	46432F339	413	3,698	SH		SOLE		3,698	0	0
iShares Russell (1000 Value Etf)	ETF	464287598	2,050	14,141	SH		SOLE		14,141	0	0
iShares Russell 2000 (etf)	ETF	464287655	382	2,258	SH		SOLE		2,258	0	0
iShares TR MSCI (global Imp)	ETF	46435G532	1,741	21,793	SH		SOLE		21,793	0	0
iShares TR Rus Mid (cap Etf)	ETF	464287499	765	11,832	SH		SOLE		11,832	0	0
iShares TR Russell 1000 Growth Index Fund	ETF	464287614	3,539	16,183	SH		SOLE		16,183	0	0
iShares TR S & P 500 Growth Index Fun	ETF	464287309	1,625	26,933	SH		SOLE		26,933	0	0
iShares TR USA Momentum FCT	ETF	46432F396	224	1,646	SH		SOLE		1,646	0	0
iShares Ultra Short-Term Bond ETF	ETF	46434V878	58,429	1,167,639	SH		SOLE		1,167,639	0	0
Johnson & Johnson	Common Stock	478160104	1,534	8,639	SH		SOLE		8,639	0	0
JP Morgan USD UltraShort Income ETF	ETF	46641Q837	196,562	3,924,182	SH		SOLE		3,924,182	0	0
JPMorgan Chase	Common Stock	46625H100	17,710	157,267	SH		SOLE		157,267	0	0
Kellogg Company Com	Common Stock	487836108	146	2,052	SH		SOLE		2,052	0	0
Kraneshares TR (global Carbon)	ETF	500767678	527	10,695	SH		SOLE		10,695	0	0
Laboratory Corporation Of America Holdings	Common Stock	50540R409	310	1,321	SH		SOLE		1,321	0	0
Lockheed Martin Corp	Common Stock	539830109	596	1,387	SH		SOLE		1,387	0	0
Loews Corporation	Common Stock	540424108	356	6,000	SH		SOLE		6,000	0	0
Lowes Companies	Common Stock	548661107	17,951	102,770	SH		SOLE		102,770	0	0
Luminar Technologies Inc CL A	Common Stock	550424105	1,434	241,874	SH		SOLE		241,874	0	0
Marsh &mclennan	Common Stock	571748102	166	1,068	SH		SOLE		1,068	0	0
McCormick & Co., Inc. Non-Voting	Common Stock	579780206	338	4,066	SH		SOLE		4,066	0	0
McDonald's	Common Stock	580135101	935	3,787	SH		SOLE		3,787	0	0
Merck & Co Inc	Common Stock	58933Y105	779	8,543	SH		SOLE		8,543	0	0
Microsoft	Common Stock	594918104	20,587	80,155	SH		SOLE		80,155	0	0
Northern Trust Corp.	Common Stock	665859104	116	1,199	SH		SOLE		1,199	0	0
Oracle Corporation	Common Stock	68389X105	137	1,962	SH		SOLE		1,962	0	0
Pepsico Inc	Common Stock	713448108	1,629	9,774	SH		SOLE		9,774	0	0
Pfizer	Common Stock	717081103	659	12,570	SH		SOLE		12,570	0	0
Philip Morris International Inc.	Common Stock	718172109	265	2,685	SH		SOLE		2,685	0	0
Phillips 66	Common Stock	718546104	83	1,017	SH		SOLE		1,017	0	0
Pioneer Natural Resources Company	Common Stock	723787107	223	1,000	SH		SOLE		1,000	0	0
Procter & Gamble	Common Stock	742718109	5,969	41,512	SH		SOLE		41,512	0	0
Progressive Corporation	Common Stock	743315103	420	3,608	SH		SOLE		3,608	0	0
Prologis Inc	Common Stock	74340W103	16,339	138,879	SH		SOLE		138,879	0	0
Qualcomm Inc.	Common Stock	747525103	422	3,305	SH		SOLE		3,305	0	0
Raytheon Technologies Corp	Common Stock	75513E101	284	2,950	SH		SOLE		2,950	0	0
S P Global Inc	Common Stock	78409V104	573	1,700	SH		SOLE		1,700	0	0
Sempra Energy	Common Stock	816851109	123	818	SH		SOLE		818	0	0
Sherwin Williams Co	Common Stock	824348106	14,994	66,965	SH		SOLE		66,965	0	0
SPDR Index SHS FDS (msci EAFE FS Etf)	ETF	78470E106	572	8,728	SH		SOLE		8,728	0	0
SPDR S&P 500 Unit Ser 1	ETF	78462F103	150,161	398,038	SH		SOLE		398,038	0	0
SPDR Ser TR SPDR S&P (500 Etf)	ETF	78468R796	2,903	31,471	SH		SOLE		31,471	0	0
SPDR Series Trust (S&P 600 SMCP Val)	ETF	78464A300	211	2,920	SH		SOLE		2,920	0	0
Sprott Physical (silver Trust Trust Unit Isin #ca85207k1075)	ETF	85207K107	222	32,170	SH		SOLE		32,170	0	0
Sprott Physical Gold (trust Unit Isin #ca85207h1047 Sedol #BYVW239)	ETF	85207H104	960	67,700	SH		SOLE		67,700	0	0
Technology Select Sector SPDR Fund	ETF	81369Y803	3,655	28,044	SH		SOLE		28,044	0	0
Thermo Fisher Scientific Inc	Common Stock	883556102	22,933	42,213	SH		SOLE		42,213	0	0
Union Pacific Corp	Common Stock	907818108	732	3,432	SH		SOLE		3,432	0	0
Vanguard BD Index FD Inc Total BND MRKT	ETF	921937835	207	2,751	SH		SOLE		2,751	0	0
Vanguard Index Funds (S&P 500 ETF Usd)	ETF	922908363	2,101	6,056	SH		SOLE		6,056	0	0
Vanguard Specialized (funds DIV App Etf)	ETF	921908844	243	1,693	SH		SOLE		1,693	0	0
Vanguard Star Total International Stock Fund	ETF	921909768	234	4,540	SH		SOLE		4,540	0	0
Vanguard Tax-Managed (intl FD FTSE Dev MKT Etf)	ETF	921943858	227	5,571	SH		SOLE		5,571	0	0
Vanguard Total STK MRKT ETF	ETF	922908769	12,611	66,859	SH		SOLE		66,859	0	0
Vanguard Value ETF	ETF	922908744	223	1,690	SH		SOLE		1,690	0	0
Visa Inc	Common Stock	92826C839	159	806	SH		SOLE		806	0	0
Wal-Mart	Common Stock	931142103	521	4,285	SH		SOLE		4,285	0	0
Walt Disney	Common Stock	254687106	122	1,288	SH		SOLE		1,288	0	0
Waters Corp	Common Stock	941848103	113	340	SH		SOLE		340	0	0
Wells Fargo Co New	Common Stock	949746101	154	3,936	SH		SOLE		3,936	0	0
Zoetis, Inc. Class A	Common Stock	98978V103	342	1,989	SH		SOLE		1,989	0	0