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
ALIBABA GROUP HLDG LTD	SPONSORED ADS	01609W102	354	1,205	SH		SOLE		0	0	1,205
AMAZON COM INC	COM	023135106	507	161	SH		SOLE		0	0	161
APPLE INC	COM	037833100	1,240	10,705	SH		SOLE		0	0	10,704
ARCHER DANIELS MIDLAND CO	COM	039483102	261	5,624	SH		SOLE		0	0	5,624
BERKSHIRE HATHAWAY INC DEL	CL B NEW	084670702	411	1,928	SH		SOLE		0	0	1,928
BIOLIFE SOLUTIONS INC	COM NEW	09062W204	7,449	257,389	SH		SOLE		0	0	257,389
CAMBRIDGE BANCORP	COM	132152109	540	10,154	SH		SOLE		0	0	10,154
DISNEY WALT CO	COM DISNEY	254687106	267	2,155	SH		SOLE		0	0	2,154
EATON VANCE TXMGD GL BUYWR O	COM	27829C105	102	12,000	SH		SOLE		0	0	12,000
FIDELITY MERRIMACK STR TR	TOTAL BD ETF	316188309	4,928	90,166	SH		SOLE		0	0	90,166
FIRST TR SR FLG RTE INCM FD	COM	33733U108	117	10,635	SH		SOLE		0	0	10,635
FIRST TR EXCH TRADED FD III	MANAGD MUN ETF	33739N108	470	8,452	SH		SOLE		0	0	8,451
FOCUS FINL PARTNERS INC	COM CL A	34417P100	2,520	76,850	SH		SOLE		0	0	76,850
FORD MTR CO DEL	COM	345370860	344	51,614	SH		SOLE		0	0	51,613
INVESCO EXCH TRD SLF IDX FD	BULSHS 2020 CB	46138J502	1,035	48,758	SH		SOLE		0	0	48,758
INVESCO EXCH TRD SLF IDX FD	BULSHS 2021 CB	46138J700	9,071	425,479	SH		SOLE		0	0	425,479
INVESCO EXCH TRD SLF IDX FD	BULSHS 2023 CB	46138J866	7,898	362,459	SH		SOLE		0	0	362,459
INVESCO EXCH TRD SLF IDX FD	BULSHS 2022 CB	46138J882	9,040	413,912	SH		SOLE		0	0	413,912
ISHARES GOLD TRUST	ISHARES	464285105	4,448	247,265	SH		SOLE		0	0	247,265
ISHARES TR	CORE S&P TTL STK	464287150	2,927	38,771	SH		SOLE		0	0	38,771
ISHARES TR	SELECT DIVID ETF	464287168	266	3,263	SH		SOLE		0	0	3,263
ISHARES TR	CORE S&P500 ETF	464287200	1,348	4,010	SH		SOLE		0	0	4,010
ISHARES TR	CORE US AGGBD ET	464287226	1,129	9,567	SH		SOLE		0	0	9,566
ISHARES TR	NORTH AMERN NAT	464287374	1,317	66,500	SH		SOLE		0	0	66,500
ISHARES TR	MSCI EAFE ETF	464287465	314	4,932	SH		SOLE		0	0	4,932
ISHARES TR	RUS 1000 ETF	464287622	7,158	38,247	SH		SOLE		0	0	38,246
ISHARES TR	NATIONAL MUN ETF	464288414	532	4,585	SH		SOLE		0	0	4,585
ISHARES TR	MSCI INTL SML CP	46434V266	1,550	51,564	SH		SOLE		0	0	51,563
ISHARES TR	IBONDS DEC2023	46435G318	2,398	91,235	SH		SOLE		0	0	91,234
ISHARES TR	CORE INTL AGGR	46435G672	209	3,756	SH		SOLE		0	0	3,756
ISHARES TR	IBONDS DEC2022	46435G755	2,414	91,085	SH		SOLE		0	0	91,084
ISHARES TR	IBONDS DEC2021	46435G789	2,309	89,101	SH		SOLE		0	0	89,100
ISHARES TR	IBONDS DEC 26	46435U259	629	23,367	SH		SOLE		0	0	23,367
ISHARES TR	IBONDS DEC 25	46435U432	1,321	47,018	SH		SOLE		0	0	47,017
ISHARES TR	IBONDS DEC	46435U697	2,062	76,120	SH		SOLE		0	0	76,119
LATTICE STRATEGIES TR	HARTFORD MLT ETF	518416102	278	10,758	SH		SOLE		0	0	10,757
MICROSOFT CORP	COM	594918104	992	4,718	SH		SOLE		0	0	4,718
PFIZER INC	COM	717081103	271	7,384	SH		SOLE		0	0	7,384
SPDR S&P 500 ETF TR	TR UNIT	78462F103	510	1,523	SH		SOLE		0	0	1,523
SPDR GOLD TR	GOLD SHS	78463V107	1,173	6,624	SH		SOLE		0	0	6,624
SPDR INDEX SHS FDS	MSCI EMRG MKTS	78463X426	1,964	34,766	SH		SOLE		0	0	34,766
SPDR INDEX SHS FDS	MSCI EAFE STRTGC	78463X434	241	3,904	SH		SOLE		0	0	3,903
SPDR INDEX SHS FDS	PORTFOLIO DEVLPD	78463X889	16,381	559,836	SH		SOLE		0	0	559,836
SPDR SER TR	PORTFOLIO AGRGTE	78464A649	33,077	1,073,580	SH		SOLE		0	0	1,073,580
SPDR SER TR	S&P DIVID ETF	78464A763	1,025	11,094	SH		SOLE		0	0	11,094
SPDR SER TR	PORTFOLI S&P1500	78464A805	25,013	611,703	SH		SOLE		0	0	611,703
SPDR SER TR	PORTFOLIO S&P500	78464A854	1,034	26,269	SH		SOLE		0	0	26,268
SSGA ACTIVE ETF TR	SPDR TR TACTIC	78467V848	589	11,955	SH		SOLE		0	0	11,954
SPDR SER TR	PORTFOLIO SH TSR	78468R101	19,973	650,578	SH		SOLE		0	0	650,577
SPDR SER TR	BLOMBERG BRC INV	78468R200	214	6,984	SH		SOLE		0	0	6,984
SPDR SER TR	NUVEEN BRC MUNIC	78468R721	455	8,771	SH		SOLE		0	0	8,770
SPDR SER TR	NUVEEN BLMBRG SR	78468R739	292	5,863	SH		SOLE		0	0	5,863
SPDR SER TR	MSCI USA STRTGIC	78468R812	4,473	47,270	SH		SOLE		0	0	47,270
SPDR SER TR	PORTFOLIO S&P600	78468R853	219	8,015	SH		SOLE		0	0	8,014
SSGA ACTIVE TR	SPDR DBLELN EMRG	78470P309	615	12,324	SH		SOLE		0	0	12,324
SCHWAB STRATEGIC TR	US LRG CAP ETF	808524201	9,509	117,934	SH		SOLE		0	0	117,934
SCHWAB STRATEGIC TR	US MID-CAP ETF	808524508	3,033	54,668	SH		SOLE		0	0	54,668
SCHWAB STRATEGIC TR	US SML CAP ETF	808524607	980	14,342	SH		SOLE		0	0	14,341
SCHWAB STRATEGIC TR	SCHWB FDT EMK LG	808524730	434	18,288	SH		SOLE		0	0	18,288
SCHWAB STRATEGIC TR	US DIVIDEND EQ	808524797	278	5,027	SH		SOLE		0	0	5,027
SCHWAB STRATEGIC TR	INTL EQTY ETF	808524805	295	9,411	SH		SOLE		0	0	9,410
SCHWAB STRATEGIC TR	US AGGREGATE B	808524839	5,157	91,955	SH		SOLE		0	0	91,955
SCHWAB STRATEGIC TR	SHT TM US TRES	808524862	6,965	135,241	SH		SOLE		0	0	135,241
SELECT SECTOR SPDR TR	TECHNOLOGY	81369Y803	330	2,828	SH		SOLE		0	0	2,827
SPROTT PHYSICAL GOLD TR	UNIT	85207H104	15,359	1,020,550	SH		SOLE		0	0	1,020,550
VANGUARD SPECIALIZED FUNDS	DIV APP ETF	921908844	2,165	16,830	SH		SOLE		0	0	16,830
VANGUARD WHITEHALL FDS	HIGH DIV YLD	921946406	639	7,898	SH		SOLE		0	0	7,897
VANGUARD MALVERN FDS	STRM INFPROIDX	922020805	1,438	28,177	SH		SOLE		0	0	28,177
VANGUARD INTL EQUITY INDEX F	GLB EX US ETF	922042676	429	8,835	SH		SOLE		0	0	8,835
VANGUARD WORLD FDS	MATERIALS ETF	92204A801	1,305	9,697	SH		SOLE		0	0	9,697
VANGUARD INDEX FDS	MCAP GR IDXVIP	922908538	201	1,117	SH		SOLE		0	0	1,117
VANGUARD INDEX FDS	REAL ESTATE ETF	922908553	1,831	23,188	SH		SOLE		0	0	23,188
VANGUARD INDEX FDS	SML CP GRW ETF	922908595	1,592	7,405	SH		SOLE		0	0	7,405
VANGUARD INDEX FDS	MID CAP ETF	922908629	2,901	16,459	SH		SOLE		0	0	16,458
VANGUARD INDEX FDS	GROWTH ETF	922908736	5,638	24,770	SH		SOLE		0	0	24,769
VANGUARD INDEX FDS	SMALL CP ETF	922908751	345	2,240	SH		SOLE		0	0	2,240
VANGUARD INDEX FDS	TOTAL STK MKT	922908769	2,448	14,372	SH		SOLE		0	0	14,371
WALMART INC	COM	931142103	288	2,059	SH		SOLE		0	0	2,058
WISDOMTREE TR	INTL EQUITY FD	97717W703	358	7,876	SH		SOLE		0	0	7,876
WISDOMTREE TR	GLB US QTLY DIV	97717W844	2,104	31,561	SH		SOLE		0	0	31,561
WISDOMTREE TR	US QTLY DIV GRT	97717X669	5,094	102,773	SH		SOLE		0	0	102,773