Ruane, Cunniff & Goldfarb 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
ALPHABET INC	CAP STK CL A	02079K305	351,936	248,183	SH		SOLE		248,183	0	0
ALPHABET INC	CAP STK CL C	02079K107	726,774	514,126	SH		SOLE		514,126	0	0
AMAZON COM INC	COM	023135106	318,211	115,343	SH		SOLE		115,343	0	0
AMERICAN ELEC PWR CO INC	COM	025537101	532	6,686	SH		SOLE		6,686	0	0
ANGI HOMESERVICES INC	COM CL A	00183L102	178	14,674	SH		SOLE		14,674	0	0
ARISTA NETWORKS INC	COM	040413106	415,440	1,978,002	SH		SOLE		1,978,002	0	0
Alibaba Group Sh ADR	SPONSORED ADS	01609W102	420	1,945	SH		SOLE		1,945	0	0
BERKSHIRE HATHAWAY INC DEL	CL B NEW	084670702	197,414	1,105,900	SH		SOLE		1,105,900	0	0
BERKSHIRE HATHAWAY INC DEL	CL A	084670108	274,784	1,028	SH		SOLE		1,028	0	0
BUILDERS FIRSTSOURCE INC	COM	12008R107	1,647	79,562	SH		SOLE		79,562	0	0
CARMAX INC	COM	143130102	602,625	6,729,480	SH		SOLE		6,729,480	0	0
COCA COLA CO	COM	191216100	471	10,550	SH		SOLE		10,550	0	0
CREDIT ACCEP CORP MICH	COM	225310101	505,415	1,206,213	SH		SOLE		1,206,213	0	0
DISNEY WALT CO	COM DISNEY	254687106	313,816	2,814,237	SH		SOLE		2,814,237	0	0
EDISON INTL	COM	281020107	427	7,868	SH		SOLE		7,868	0	0
EXPEDITORS INTL WASH INC	COM	302130109	7,766	102,132	SH		SOLE		102,132	0	0
Facebook Inc Cl A	CL A	30303M102	520,517	2,292,319	SH		SOLE		2,292,319	0	0
Fiat Chrysler Automobiles NV s	SHS	N31738102	387	37,777	SH		SOLE		37,777	0	0
GTT COMMUNICATIONS INC	COM	362393100	197	24,100	SH		SOLE		24,100	0	0
JACOBS ENGR GROUP INC	COM	469814107	355,991	4,198,002	SH		SOLE		4,198,002	0	0
JD.COM INC	SPON ADR CL A	47215P106	722	12,000	SH		SOLE		12,000	0	0
LIBERTY BROADBAND CORP	COM SER C	530307305	276,691	2,232,097	SH		SOLE		2,232,097	0	0
LIBERTY BROADBAND CORP	COM SER A	530307107	119,718	979,772	SH		SOLE		979,772	0	0
LIBERTY MEDIA CORP DEL	COM SER C FRMLA	531229854	324,361	10,228,970	SH		SOLE		10,228,970	0	0
LIBERTY MEDIA CORP DEL	COM SER A FRMLA	531229870	10,158	348,113	SH		SOLE		348,113	0	0
MASTERCARD INCORPORATED	CL A	57636Q104	295,087	997,928	SH		SOLE		997,928	0	0
MOHAWK INDS INC	COM	608190104	1,102	10,833	SH		SOLE		10,833	0	0
PROCTER AND GAMBLE CO	COM	742718109	615	5,144	SH		SOLE		5,144	0	0
SCHWAB CHARLES CORP	COM	808513105	331,849	9,835,466	SH		SOLE		9,835,466	0	0
SINCLAIR BROADCAST GROUP INC	CL A	829226109	385	20,845	SH		SOLE		20,845	0	0
Sailpoint Technologies Holding	COM	78781P105	388	14,663	SH		SOLE		14,663	0	0
TAIWAN SEMICONDUCTOR MFG LTD	SPONSORED ADS	874039100	387,595	6,827,455	SH		SOLE		6,827,455	0	0
UNION PAC CORP	COM	907818108	568	3,360	SH		SOLE		3,360	0	0
Unitedhealth Group Inc	COM	91324P102	422,945	1,433,955	SH		SOLE		1,433,955	0	0
VISA INC	COM CL A	92826C839	107,924	558,702	SH		SOLE		558,702	0	0
WAITR HLDGS INC	COM	930752100	50	18,989	SH		SOLE		18,989	0	0
WAYFAIR INC	CL A	94419L101	586,675	2,968,852	SH		SOLE		2,968,852	0	0