Sentinel Pension Advisors 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
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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
ALPS ETF TR	REIT DIVIDE DOGS	00162Q106	235	4,894	SH		SOLE		0	0	4,894
AMERICAN CENTY ETF TR	AVANTIS EMGMKT	025072604	2,672	38,418	SH		SOLE		0	0	38,418
AMERICAN CENTY ETF TR	US SML CP VALU	025072877	1,208	15,895	SH		SOLE		0	0	15,895
APPLE INC	COM	037833100	1,331	9,715	SH		SOLE		0	0	9,715
ARCHER DANIELS MIDLAND CO	COM	039483102	341	5,624	SH		SOLE		0	0	5,624
BERKSHIRE HATHAWAY INC DEL	CL B NEW	084670702	205	737	SH		SOLE		0	0	737
BIOLIFE SOLUTIONS INC	COM NEW	09062W204	2,797	62,842	SH		SOLE		0	0	62,842
BOEING CO	COM	097023105	210	875	SH		SOLE		0	0	875
CAMBRIDGE BANCORP	COM	132152109	1,357	16,355	SH		SOLE		0	0	16,355
CISCO SYS INC	COM	17275R102	229	4,327	SH		SOLE		0	0	4,326
CREDIT SUISSE AG NASSAU BRH	LG CAP GRTH ENH	22542D423	219	318	SH		SOLE		0	0	318
DISNEY WALT CO	COM	254687106	204	1,162	SH		SOLE		0	0	1,161
ETF MANAGERS TR	ETFMG ALTR HRVST	26924G508	206	10,022	SH		SOLE		0	0	10,021
FACEBOOK INC	CL A	30303M102	217	623	SH		SOLE		0	0	623
FIDELITY MERRIMACK STR TR	TOTAL BD ETF	316188309	10,667	200,016	SH		SOLE		0	0	200,015
FIRST TR SR FLTG RATE INCOME	COM	33733U108	146	11,499	SH		SOLE		0	0	11,499
FIRST TR EXCH TRADED FD III	MANAGD MUN ETF	33739N108	749	13,074	SH		SOLE		0	0	13,073
FOCUS FINL PARTNERS INC	COM CL A	34417P100	2,316	47,744	SH		SOLE		0	0	47,744
FORD MTR CO DEL	COM	345370860	1,210	81,397	SH		SOLE		0	0	81,396
HYDROFARM HLDGS GROUP INC	COM	44888K209	278	4,704	SH		SOLE		0	0	4,704
INVESCO EXCH TRD SLF IDX FD	BULSHS 2021 CB	46138J700	10,991	520,893	SH		SOLE		0	0	520,892
INVESCO EXCH TRD SLF IDX FD	BULSHS 2023 CB	46138J866	10,896	501,441	SH		SOLE		0	0	501,441
INVESCO EXCH TRD SLF IDX FD	BULSHS 2022 CB	46138J882	11,489	532,138	SH		SOLE		0	0	532,137
ISHARES TR	CORE S&P TTL STK	464287150	3,687	37,329	SH		SOLE		0	0	37,328
ISHARES TR	CORE S&P500 ETF	464287200	1,583	3,683	SH		SOLE		0	0	3,682
ISHARES TR	CORE US AGGBD ET	464287226	1,044	9,053	SH		SOLE		0	0	9,053
ISHARES TR	NORTH AMERN NAT	464287374	1,477	48,524	SH		SOLE		0	0	48,524
ISHARES TR	RUS 1000 ETF	464287622	6,126	25,305	SH		SOLE		0	0	25,305
ISHARES TR	NATIONAL MUN ETF	464288414	541	4,619	SH		SOLE		0	0	4,619
ISHARES TR	0-5 YR TIPS ETF	46429B747	3,044	28,630	SH		SOLE		0	0	28,630
ISHARES TR	MSCI INTL SML CP	46434V266	2,009	54,714	SH		SOLE		0	0	54,714
ISHARES TR	IBONDS DEC2023	46435G318	2,567	98,312	SH		SOLE		0	0	98,312
ISHARES TR	CORE INTL AGGR	46435G672	202	3,672	SH		SOLE		0	0	3,672
ISHARES TR	IBONDS DEC2022	46435G755	2,465	93,865	SH		SOLE		0	0	93,864
ISHARES TR	IBONDS DEC2021	46435G789	2,324	90,640	SH		SOLE		0	0	90,640
ISHARES TR	IBONDS DEC 26	46435U259	478	17,727	SH		SOLE		0	0	17,727
ISHARES TR	IBONDS DEC 25	46435U432	1,178	42,078	SH		SOLE		0	0	42,077
ISHARES TR	IBONDS DEC	46435U697	1,924	71,303	SH		SOLE		0	0	71,302
LATTICE STRATEGIES TR	HARTFORD MLT ETF	518416102	216	7,018	SH		SOLE		0	0	7,018
MICROSOFT CORP	COM	594918104	830	3,065	SH		SOLE		0	0	3,064
NEXGEN ENERGY LTD	COM	65340P106	41	10,000	SH		SOLE		0	0	10,000
NOVO-NORDISK A S	ADR	670100205	215	2,563	SH		SOLE		0	0	2,563
PFIZER INC	COM	717081103	285	7,274	SH		SOLE		0	0	7,274
SPDR S&P 500 ETF TR	TR UNIT	78462F103	461	1,077	SH		SOLE		0	0	1,076
SPDR GOLD TR	GOLD SHS	78463V107	490	2,961	SH		SOLE		0	0	2,961
SPDR INDEX SHS FDS	MSCI EMRG MKTS	78463X426	502	7,153	SH		SOLE		0	0	7,152
SPDR INDEX SHS FDS	PORTFOLIO EMG MK	78463X509	204	4,491	SH		SOLE		0	0	4,490
SPDR INDEX SHS FDS	PORTFOLIO DEVLPD	78463X889	25,996	706,598	SH		SOLE		0	0	706,598
SPDR SER TR	PORTFOLIO AGRGTE	78464A649	38,304	1,276,363	SH		SOLE		0	0	1,276,362
SPDR SER TR	S&P DIVID ETF	78464A763	605	4,946	SH		SOLE		0	0	4,945
SPDR SER TR	PORTFOLI S&P1500	78464A805	39,978	754,730	SH		SOLE		0	0	754,729
SPDR SER TR	PORTFOLIO S&P400	78464A847	300	6,364	SH		SOLE		0	0	6,363
SPDR SER TR	PORTFOLIO S&P500	78464A854	1,691	33,595	SH		SOLE		0	0	33,595
SSGA ACTIVE ETF TR	SPDR TR TACTIC	78467V848	588	12,142	SH		SOLE		0	0	12,142
SPDR SER TR	PORTFOLIO SH TSR	78468R101	1,696	55,337	SH		SOLE		0	0	55,337
SPDR SER TR	NUVEEN BRC MUNIC	78468R721	462	8,870	SH		SOLE		0	0	8,869
SPDR SER TR	NUVEEN BLMBRG SR	78468R739	309	6,230	SH		SOLE		0	0	6,229
SPDR SER TR	MSCI USA STRTGIC	78468R812	6,610	55,339	SH		SOLE		0	0	55,339
SPDR SER TR	PORTFOLIO S&P600	78468R853	513	11,684	SH		SOLE		0	0	11,684
SSGA ACTIVE TR	SPDR DBLELN EMRG	78470P309	643	12,592	SH		SOLE		0	0	12,592
SCHWAB STRATEGIC TR	US BRD MKT ETF	808524102	204	1,959	SH		SOLE		0	0	1,959
SCHWAB STRATEGIC TR	US LRG CAP ETF	808524201	14,638	140,787	SH		SOLE		0	0	140,787
SCHWAB STRATEGIC TR	US LCAP GR ETF	808524300	208	1,426	SH		SOLE		0	0	1,426
SCHWAB STRATEGIC TR	US MID-CAP ETF	808524508	4,669	59,647	SH		SOLE		0	0	59,646
SCHWAB STRATEGIC TR	US SML CAP ETF	808524607	366	3,516	SH		SOLE		0	0	3,516
SCHWAB STRATEGIC TR	INTL EQTY ETF	808524805	368	9,326	SH		SOLE		0	0	9,325
SCHWAB STRATEGIC TR	US AGGREGATE B	808524839	7,780	142,495	SH		SOLE		0	0	142,495
SCHWAB STRATEGIC TR	SHT TM US TRES	808524862	1,450	28,314	SH		SOLE		0	0	28,313
SELECT SECTOR SPDR TR	TECHNOLOGY	81369Y803	405	2,743	SH		SOLE		0	0	2,742
SPROTT PHYSICAL GOLD TR	UNIT	85207H104	8,916	635,514	SH		SOLE		0	0	635,514
SPROTT PHYSICAL SILVER TR	TR UNIT	85207K107	203	21,842	SH		SOLE		0	0	21,842
VANECK VECTORS ETF TR	MORNINGSTAR WIDE	92189F643	5,555	75,004	SH		SOLE		0	0	75,004
VANGUARD SPECIALIZED FUNDS	DIV APP ETF	921908844	2,046	13,220	SH		SOLE		0	0	13,220
VANGUARD WHITEHALL FDS	HIGH DIV YLD	921946406	680	6,489	SH		SOLE		0	0	6,489
VANGUARD MALVERN FDS	STRM INFPROIDX	922020805	1,483	28,296	SH		SOLE		0	0	28,296
VANGUARD INTL EQUITY INDEX F	GLB EX US ETF	922042676	508	8,706	SH		SOLE		0	0	8,706
VANGUARD WORLD FDS	FINANCIALS ETF	92204A405	824	9,109	SH		SOLE		0	0	9,109
VANGUARD WORLD FDS	MATERIALS ETF	92204A801	1,184	6,547	SH		SOLE		0	0	6,547
VANGUARD INDEX FDS	MCAP GR IDXVIP	922908538	264	1,117	SH		SOLE		0	0	1,117
VANGUARD INDEX FDS	REAL ESTATE ETF	922908553	1,701	16,712	SH		SOLE		0	0	16,712
VANGUARD INDEX FDS	SML CP GRW ETF	922908595	1,700	5,865	SH		SOLE		0	0	5,865
VANGUARD INDEX FDS	MID CAP ETF	922908629	3,159	13,311	SH		SOLE		0	0	13,311
VANGUARD INDEX FDS	LARGE CAP ETF	922908637	200	997	SH		SOLE		0	0	997
VANGUARD INDEX FDS	GROWTH ETF	922908736	4,986	17,385	SH		SOLE		0	0	17,385
VANGUARD INDEX FDS	TOTAL STK MKT	922908769	2,894	12,986	SH		SOLE		0	0	12,985
VERIZON COMMUNICATIONS INC	COM	92343V104	643	11,484	SH		SOLE		0	0	11,484
WALMART INC	COM	931142103	812	5,755	SH		SOLE		0	0	5,754
WISDOMTREE TR	INTL EQUITY FD	97717W703	378	6,941	SH		SOLE		0	0	6,941
WISDOMTREE TR	GLB US QTLY DIV	97717W844	2,811	67,452	SH		SOLE		0	0	67,452
WISDOMTREE TR	US QTLY DIV GRT	97717X669	2,772	46,462	SH		SOLE		0	0	46,461