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	972	67,700	SH		SOLE		67,700	0	0
Sprott Physical Silver Trust	COM	85207K107	258	32,170	SH		SOLE		32,170	0	0
JPMorgan Hedged Equity Select	COM	46637K281	94,803	3,512,537	SH		SOLE		3,512,537	0	0
3M Company	COM	88579Y101	709	3,994	SH		SOLE		3,994	0	0
Abbott Laboratories	COM	002824100	620	4,407	SH		SOLE		4,407	0	0
AbbVie, Inc.	COM	00287y109	498	3,676	SH		SOLE		3,676	0	0
Accenture PLC	COM	G1151c101	24,157	58,274	SH		SOLE		58,274	0	0
Agilent Technologies, Inc.	COM	00846U101	211	1,320	SH		SOLE		1,320	0	0
Air Products and Chemicals, In	COM	009158106	829	2,725	SH		SOLE		2,725	0	0
Alphabet Inc. Class A	COM	02079K305	3,685	1,272	SH		SOLE		1,272	0	0
Alphabet Inc. Class C	COM	02079K107	5,602	1,936	SH		SOLE		1,936	0	0
Amazon.com, Inc.	COM	023135106	29,092	8,725	SH		SOLE		8,725	0	0
American Express Company	COM	025816109	26,677	163,064	SH		SOLE		163,064	0	0
Amphenol Corporation Class A	COM	032095101	27,564	315,164	SH		SOLE		315,164	0	0
Apple Inc	COM	037833100	18,291	103,008	SH		SOLE		103,008	0	0
Automatic Data Processing, Inc	COM	053015103	334	1,353	SH		SOLE		1,353	0	0
Baxter International Inc.	COM	071813109	265	3,084	SH		SOLE		3,084	0	0
Berkshire Hathaway, Inc. Cl. A	COM	084670108	2,253	5	SH		SOLE		5	0	0
Berkshire Hathaway, Inc. Cl. B	COM	084670702	24,602	82,282	SH		SOLE		82,282	0	0
BlackRock Inc.	COM	09247X101	505	552	SH		SOLE		552	0	0
Bristol-Myers Squibb Company	COM	110122108	677	10,857	SH		SOLE		10,857	0	0
Chubb Limited	COM	H1467J104	221	1,141	SH		SOLE		1,141	0	0
Cisco Systems, Inc.	COM	17275R102	470	7,424	SH		SOLE		7,424	0	0
Coca-Cola Company	COM	191216100	2,327	39,297	SH		SOLE		39,297	0	0
Colgate-Palmolive Company	COM	194162103	925	10,834	SH		SOLE		10,834	0	0
Costco Wholesale Corporation	COM	22160K105	27,384	48,237	SH		SOLE		48,237	0	0
Danaher Corp	COM	235851102	447	1,360	SH		SOLE		1,360	0	0
Eli Lilly and Company	COM	532457108	843	3,053	SH		SOLE		3,053	0	0
Enterprise Bancorp, Inc.	COM	293668109	1,406	31,306	SH		SOLE		31,306	0	0
Exxon Mobil Corporation	COM	30231G102	262	4,274	SH		SOLE		4,274	0	0
Hershey Company	COM	427866108	264	1,366	SH		SOLE		1,366	0	0
Illinois Tool Works Inc.	COM	452308109	633	2,566	SH		SOLE		2,566	0	0
Intel Corporation	COM	458140100	350	6,800	SH		SOLE		6,800	0	0
Johnson & Johnson	COM	478160104	1,929	11,274	SH		SOLE		11,274	0	0
Johnson Controls International	COM	G51502105	582	7,158	SH		SOLE		7,158	0	0
JPMorgan Chase & Co.	COM	46625H100	24,810	156,680	SH		SOLE		156,680	0	0
Laboratory Corporation of Amer	COM	50540R409	415	1,321	SH		SOLE		1,321	0	0
Lockheed Martin Corporation	COM	539830109	496	1,396	SH		SOLE		1,396	0	0
Loews Corporation	COM	540424108	347	6,000	SH		SOLE		6,000	0	0
Lowes Cos. Inc.	COM	548661107	27,569	106,660	SH		SOLE		106,660	0	0
Luminar Technologies Inc Class	COM	550424105	4,090	241,874	SH		SOLE		241,874	0	0
McCormick & Co., Inc. Non-Voti	COM	579780206	1,546	16,000	SH		SOLE		16,000	0	0
McDonald's Corporation	COM	580135101	1,022	3,813	SH		SOLE		3,813	0	0
Merck & Co., Inc.	COM	58933y105	639	8,343	SH		SOLE		8,343	0	0
Microsoft Corporation	COM	594918104	27,515	81,813	SH		SOLE		81,813	0	0
Netflix, Inc.	COM	64110l106	957	1,588	SH		SOLE		1,588	0	0
NIKE, Inc. Class B	COM	654106103	20,954	125,724	SH		SOLE		125,724	0	0
Novus Capital Corp. II Class A	COM	67012W104	1,000	101,010	SH		SOLE		101,010	0	0
PepsiCo, Inc.	COM	713448108	1,698	9,774	SH		SOLE		9,774	0	0
Pfizer Inc.	COM	717081103	1,136	19,235	SH		SOLE		19,235	0	0
Procter & Gamble Company	COM	742718109	6,900	42,179	SH		SOLE		42,179	0	0
Progressive Corporation	COM	743315103	631	6,148	SH		SOLE		6,148	0	0
Prologis Inc.	COM	74340W103	23,640	140,412	SH		SOLE		140,412	0	0
Qualcomm Inc.	COM	747525103	214	1,170	SH		SOLE		1,170	0	0
Raytheon Technologies Corporat	COM	75513E101	254	2,950	SH		SOLE		2,950	0	0
S&P Global, Inc.	COM	78409v104	802	1,700	SH		SOLE		1,700	0	0
SentinelOne, Inc. Class A	COM	81730H109	229	4,539	SH		SOLE		4,539	0	0
Sherwin-Williams Co.	COM	824348106	23,660	67,184	SH		SOLE		67,184	0	0
Target Corp.	COM	87612E106	297	1,282	SH		SOLE		1,282	0	0
Tesla Motors, Inc.	COM	88160r101	343	325	SH		SOLE		325	0	0
Texas Instruments Inc.	COM	882508104	465	2,467	SH		SOLE		2,467	0	0
The Estee Lauder Cos Inc.	COM	518439104	10,498	28,358	SH		SOLE		28,358	0	0
Thermo Fisher Scientific Inc	COM	883556102	28,191	42,250	SH		SOLE		42,250	0	0
Union Pacific Corporation	COM	907818108	865	3,432	SH		SOLE		3,432	0	0
Visa Inc. Class A	COM	92826c839	392	1,809	SH		SOLE		1,809	0	0
Wal-Mart Stores, Inc.	COM	931142103	909	6,285	SH		SOLE		6,285	0	0
Walt Disney Company	COM	254687106	11,422	73,744	SH		SOLE		73,744	0	0
Zoetis, Inc. Class A	COM	98978V103	490	2,009	SH		SOLE		2,009	0	0
Columbia Emerging Markets Cons	COM	19762B509	216	9,033	SH		SOLE		9,033	0	0
Financial Select Sector SPDR E	COM	81369Y605	21,138	541,297	SH		SOLE		541,297	0	0
Industrial Select Sector SPDR	COM	81369Y704	20,343	192,257	SH		SOLE		192,257	0	0
iShares Core MSCI EAFE ETF	COM	46432F842	65,740	880,766	SH		SOLE		880,766	0	0
iShares Core S&P 500 ETF	COM	464287200	1,286	2,697	SH		SOLE		2,697	0	0
iShares Core S&P Small Cap ETF	COM	464287804	384	3,350	SH		SOLE		3,350	0	0
iShares Edge MSCI Min Vol USA	COM	46429b697	1,728	21,355	SH		SOLE		21,355	0	0
iShares Edge MSCI USA Momentum	COM	46432F396	16,296	89,629	SH		SOLE		89,629	0	0
iShares Edge MSCI USA Quality	COM	46432f339	560	3,849	SH		SOLE		3,849	0	0
iShares MSCI Global Impact ETF	COM	46435G532	2,236	24,632	SH		SOLE		24,632	0	0
iShares Russell 1000 Growth ET	COM	464287614	5,002	16,367	SH		SOLE		16,367	0	0
iShares Russell 1000 Value ETF	COM	464287598	2,424	14,435	SH		SOLE		14,435	0	0
iShares Russell 2000 ETF	COM	464287655	502	2,258	SH		SOLE		2,258	0	0
iShares Russell Midcap ETF	COM	464287499	982	11,832	SH		SOLE		11,832	0	0
iShares S&P 500 Growth ETF	COM	464287309	2,495	29,823	SH		SOLE		29,823	0	0
KraneShares Global Carbon ETF	COM	500767678	544	10,695	SH		SOLE		10,695	0	0
SPDR S&P 500 ETF Trust	COM	78462F103	190,685	401,475	SH		SOLE		401,475	0	0
SPDR S&P 500 Fossil Fuel Reser	COM	78468R796	3,497	29,715	SH		SOLE		29,715	0	0
SPDR S&P 600 Small Cap Value E	COM	78464A300	247	2,920	SH		SOLE		2,920	0	0
Technology Select Sector SPDR	COM	81369Y803	4,876	28,044	SH		SOLE		28,044	0	0
Vanguard Dividend Appreciation	COM	921908844	291	1,693	SH		SOLE		1,693	0	0
Vanguard FTSE Developed Market	COM	921943858	329	6,448	SH		SOLE		6,448	0	0
Vanguard S&P 500 Index Fund	COM	922908363	2,656	6,083	SH		SOLE		6,083	0	0
Vanguard Total International S	COM	921909768	289	4,540	SH		SOLE		4,540	0	0
Vanguard Total Stock Market In	COM	922908769	16,695	69,146	SH		SOLE		69,146	0	0
Vanguard Value Index Fund	COM	922908744	249	1,690	SH		SOLE		1,690	0	0