Main Street Research 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
Berkshire Hathaway Cl A	COM	084990175	1,499	6	SH		SOLE		6	0	0
3M Company	COM	88579Y101	380	1,984	SH		SOLE		1,984	0	0
AbbVie Inc	COM	00287y109	1,677	25,740	SH		SOLE		25,740	0	0
Abbott Laboratories	COM	002824100	252	5,675	SH		SOLE		5,675	0	0
Adobe Systems Inc	COM	00724f101	331	2,543	SH		SOLE		2,543	0	0
Allergan Plc	COM	g0177j108	212	887	SH		SOLE		887	0	0
Alphabet Inc Cl A	COM	02079k305	10,720	12,644	SH		SOLE		12,644	0	0
Alphabet Inc Cl C	COM	02079k107	4,719	5,688	SH		SOLE		5,688	0	0
Altria Group Inc	COM	02209s103	779	10,904	SH		SOLE		10,904	0	0
Amazon.com	COM	023135106	11,131	12,556	SH		SOLE		12,556	0	0
Amgen Inc	COM	031162100	11,233	68,468	SH		SOLE		68,468	0	0
Apple Computer	COM	037833100	13,715	95,467	SH		SOLE		95,467	0	0
At&t Inc	COM	00206R102	1,603	38,576	SH		SOLE		38,576	0	0
Auto Data Processing	COM	053015103	560	5,471	SH		SOLE		5,471	0	0
Autodesk Inc.	COM	052769106	369	4,264	SH		SOLE		4,264	0	0
BHP Billiton Ltd Adr	COM	088606108	8,530	234,855	SH		SOLE		234,855	0	0
Banco Santander Adr	COM	05965x109	81	13,336	SH		SOLE		13,336	0	0
Bank of Marin Bancorp	COM	063425102	240	3,733	SH		SOLE		3,733	0	0
Bard C R Inc	COM	067383109	11,428	45,981	SH		SOLE		45,981	0	0
Barings Corporate Inc	COM	06759x107	3,772	246,988	SH		SOLE		246,988	0	0
Berkshire Hathaway CL B	COM	084670702	1,032	6,192	SH		SOLE		6,192	0	0
Biogen IDEC Inc	COM	09062X103	1,134	4,148	SH		SOLE		4,148	0	0
Bristol-Myers Squibb Co.	COM	110122108	1,884	34,653	SH		SOLE		34,653	0	0
Broadcom Ltd	COM	y09827109	11,457	52,325	SH		SOLE		52,325	0	0
C V S Caremark Corp	COM	126650100	243	3,101	SH		SOLE		3,101	0	0
Canadian Natural Resources	COM	136385101	8,217	250,600	SH		SOLE		250,600	0	0
Caterpillar Inc	COM	149123101	10,136	109,272	SH		SOLE		109,272	0	0
Celgene Corp	COM	151020104	1,524	12,248	SH		SOLE		12,248	0	0
Charles Schwab Corp	COM	808513105	2,771	67,900	SH		SOLE		67,900	0	0
Chevron Corp	COM	166764100	11,007	102,518	SH		SOLE		102,518	0	0
Chubb Ltd	COM	h1467j104	358	2,629	SH		SOLE		2,629	0	0
Cisco Systems, Inc.	COM	17275r102	508	15,035	SH		SOLE		15,035	0	0
Clorox Co. Calif.	COM	189054109	1,438	10,668	SH		SOLE		10,668	0	0
Coca Cola Co.	COM	191216100	1,214	28,610	SH		SOLE		28,610	0	0
Colgate-Palmolive Co	COM	194162103	1,076	14,698	SH		SOLE		14,698	0	0
Comcast Corp Cl A	COM	20030N101	1,111	29,560	SH		SOLE		29,560	0	0
ConAgra Foods, Inc	COM	205887102	9,227	228,724	SH		SOLE		228,724	0	0
Costco Corp	COM	22160K105	10,850	64,704	SH		SOLE		64,704	0	0
D.R. Horton Inc	COM	23331a109	5,221	156,748	SH		SOLE		156,748	0	0
Dominion Resources	COM	25746u109	1,121	14,449	SH		SOLE		14,449	0	0
Edison International	COM	281020107	661	8,305	SH		SOLE		8,305	0	0
Exxon Mobil Corp	COM	30231G102	3,843	46,857	SH		SOLE		46,857	0	0
Facebook Inc	COM	30303m102	17,272	121,594	SH		SOLE		121,594	0	0
Fair Issac Inc	COM	303250104	436	3,385	SH		SOLE		3,385	0	0
Fifth Third Bancorp	COM	316773100	11,192	440,645	SH		SOLE		440,645	0	0
First Republic Bank	COM	33616c100	11,278	120,220	SH		SOLE		120,220	0	0
Freeport McMoran	COM	35671d857	7,798	583,685	SH		SOLE		583,685	0	0
Gartner, Inc.	COM	366651107	3,189	29,531	SH		SOLE		29,531	0	0
General Dynamics Corp	COM	369550108	9,195	49,117	SH		SOLE		49,117	0	0
General Electric Co.	COM	369604103	5,736	192,493	SH		SOLE		192,493	0	0
General Mills, Inc.	COM	370334104	899	15,240	SH		SOLE		15,240	0	0
Gilead Sciences	COM	375558103	2,066	30,414	SH		SOLE		30,414	0	0
Goldman Sachs	COM	38141G104	8,592	37,401	SH		SOLE		37,401	0	0
HSBC Hldgs Plc	COM	404280406	8,355	204,672	SH		SOLE		204,672	0	0
Home Depot	COM	437076102	10,442	71,117	SH		SOLE		71,117	0	0
IAC Interactive Corp	COM	44919p508	291	3,950	SH		SOLE		3,950	0	0
IShares Trust Russell 2000	COM	464287655	30,917	224,886	SH		SOLE		224,886	0	0
Int'l Business Machines	COM	459200101	383	2,200	SH		SOLE		2,200	0	0
Intel Corp	COM	458140100	309	8,566	SH		SOLE		8,566	0	0
J P Morgan Chase & Co.	COM	46625h100	13,163	149,853	SH		SOLE		149,853	0	0
Johnson & Johnson	COM	478160104	13,181	105,830	SH		SOLE		105,830	0	0
Kellogg Co.	COM	487836108	208	2,860	SH		SOLE		2,860	0	0
Kimberly-Clark Corp	COM	494368103	349	2,652	SH		SOLE		2,652	0	0
Kraft Heinz Co	COM	500754106	6,014	66,229	SH		SOLE		66,229	0	0
Lam Research Corp	COM	512807108	12,144	94,607	SH		SOLE		94,607	0	0
Lamb Weston Holdings	COM	513272104	2,864	68,103	SH		SOLE		68,103	0	0
LendingClub Corp	COM	52603a109	82	15,000	SH		SOLE		15,000	0	0
Lockheed Martin Corp	COM	539830109	10,754	40,186	SH		SOLE		40,186	0	0
Lowes Companies Inc	COM	548661107	282	3,435	SH		SOLE		3,435	0	0
McDonald's Corp.	COM	580135101	4,345	33,527	SH		SOLE		33,527	0	0
Merck & Co Inc	COM	58933y105	989	15,566	SH		SOLE		15,566	0	0
Microsoft Corp	COM	594918104	550	8,348	SH		SOLE		8,348	0	0
NetEase Inc	COM	64110w102	8,889	31,300	SH		SOLE		31,300	0	0
Netflix Inc.	COM	64110L106	5,837	39,488	SH		SOLE		39,488	0	0
NextEra Energy Inc	COM	65339f101	211	1,646	SH		SOLE		1,646	0	0
Nike	COM	654106103	484	8,684	SH		SOLE		8,684	0	0
Norfolk Southern Corp.	COM	655844108	336	3,000	SH		SOLE		3,000	0	0
Nucor Corp	COM	670346105	11,031	184,720	SH		SOLE		184,720	0	0
Nvidia Corp	COM	67066g104	324	2,974	SH		SOLE		2,974	0	0
Papa Murphy's Holdings Inc	COM	698814100	67	14,000	SH		SOLE		14,000	0	0
PayPal Holdings Inc	COM	70450y103	263	6,124	SH		SOLE		6,124	0	0
Pepsico	COM	713448108	464	4,145	SH		SOLE		4,145	0	0
Pfizer, Inc.	COM	717081103	848	24,786	SH		SOLE		24,786	0	0
Philip Morris International	COM	718172109	719	6,366	SH		SOLE		6,366	0	0
Phillips 66	COM	718546104	9,077	114,577	SH		SOLE		114,577	0	0
Procter & Gamble Co.	COM	742718109	23,757	264,404	SH		SOLE		264,404	0	0
Raytheon Co New Cl A	COM	755111507	232	1,521	SH		SOLE		1,521	0	0
Regions Financial CP	COM	7591EP100	13,117	902,750	SH		SOLE		902,750	0	0
Ross Stores Inc	COM	778296103	7,236	109,849	SH		SOLE		109,849	0	0
Salesforce.com	COM	79466l302	8,833	107,076	SH		SOLE		107,076	0	0
Schlumberger Ltd.	COM	806857108	9,307	119,168	SH		SOLE		119,168	0	0
Sempra Energy	COM	816851109	310	2,805	SH		SOLE		2,805	0	0
Smucker JM Company	COM	832696405	536	4,086	SH		SOLE		4,086	0	0
Snap-on Inc.	COM	833034101	6,934	41,108	SH		SOLE		41,108	0	0
Starbucks Corp	COM	855244109	7,011	120,073	SH		SOLE		120,073	0	0
TJX Companies Inc	COM	872540109	10,286	130,073	SH		SOLE		130,073	0	0
Unilever PLC Amer Shs F	COM	904767704	8,116	164,492	SH		SOLE		164,492	0	0
United Health Care	COM	91324P102	13,440	81,943	SH		SOLE		81,943	0	0
Verizon Communications	COM	92343v104	4,421	90,680	SH		SOLE		90,680	0	0
Visa Inc	COM	92826c839	9,240	103,975	SH		SOLE		103,975	0	0
Vulcan Materials Company	COM	929160109	10,015	83,128	SH		SOLE		83,128	0	0
Wal-Mart Stores Inc.	COM	931142103	367	5,096	SH		SOLE		5,096	0	0
Walt Disney Holding Co.	COM	254687106	636	5,607	SH		SOLE		5,607	0	0
Zimmer Biomet Holdings Inc	COM	98956p102	217	1,773	SH		SOLE		1,773	0	0
IShares ST National Amt Free M	ETF	464288158	226	2,137	SH		SOLE		2,137	0	0
PowerShares QQQ Trust	ETF	73935a104	202	1,529	SH		SOLE		1,529	0	0
Vanguard Total Stock Market VI	ETF	922908769	1,089	8,972	SH		SOLE		8,972	0	0
iShares S&P National AMT-Free	ETF	464288414	226	2,074	SH		SOLE		2,074	0	0
Magellan Midstream Partners	MLP	559080106	246	3,202	SH		SOLE		3,202	0	0
Alexandria Real Estate Equitie	REIT	015271109	10,528	95,262	SH		SOLE		95,262	0	0
Crown Castle Intl Corp	REIT	22822V101	10,411	110,227	SH		SOLE		110,227	0	0
Digital Realty Trust Inc	REIT	253868103	322	3,030	SH		SOLE		3,030	0	0
Simon Property Group	REIT	828806109	269	1,566	SH		SOLE		1,566	0	0
Sun Communities Inc.	REIT	866674104	12,053	150,040	SH		SOLE		150,040	0	0
Vanguard REIT Index	REIT	922908553	306	3,704	SH		SOLE		3,704	0	0