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

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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
ALPHABET INC	CAP STK CL C	02079K107	382,719	218,462	SH		SOLE		218,462	0	0
ALPHABET INC	CAP STK CL A	02079K305	377,831	215,578	SH		SOLE		215,578	0	0
AMAZON COM INC	COM	023135106	2,231	685	SH		SOLE		685	0	0
AMERICAN ELEC PWR CO INC	COM	025537101	314	3,766	SH		SOLE		3,766	0	0
ANGI HOMESERVICES INC	COM CL A	00183L102	158	11,972	SH		SOLE		11,972	0	0
ARISTA NETWORKS INC	COM	040413106	562,755	1,936,727	SH		SOLE		1,936,727	0	0
BERKSHIRE HATHAWAY INC DEL	CL B NEW	084670702	243,121	1,048,522	SH		SOLE		1,048,522	0	0
BERKSHIRE HATHAWAY INC DEL	CL A	084670108	346,076	995	SH		SOLE		995	0	0
BUILDERS FIRSTSOURCE INC	COM	12008R107	3,187	78,084	SH		SOLE		78,084	0	0
CARMAX INC	COM	143130102	618,618	6,548,997	SH		SOLE		6,548,997	0	0
COCA COLA CO	COM	191216100	305	5,559	SH		SOLE		5,559	0	0
CREDIT ACCEP CORP MICH	COM	225310101	554,696	1,602,519	SH		SOLE		1,602,519	0	0
DISNEY WALT CO	COM	254687106	501,457	2,767,727	SH		SOLE		2,767,727	0	0
EDISON INTL	COM	281020107	213	3,385	SH		SOLE		3,385	0	0
EXPEDITORS INTL WASH INC	COM	302130109	9,714	102,132	SH		SOLE		102,132	0	0
Equitable Holdings Inc	COM	29452E101	380	14,861	SH		SOLE		14,861	0	0
Facebook Inc Cl A	CL A	30303M102	606,387	2,219,897	SH		SOLE		2,219,897	0	0
Fiat Chrysler Automobiles NV s	SHS	N31738102	759	41,951	SH		SOLE		41,951	0	0
Fidelity Natl Info Svcs Inc	COM	31620M106	275,021	1,944,162	SH		SOLE		1,944,162	0	0
GTT COMMUNICATIONS INC	COM	362393100	86	24,100	SH		SOLE		24,100	0	0
Intercontinental Exchange Inc.	COM	45866F104	400,009	3,469,593	SH		SOLE		3,469,593	0	0
JACOBS ENGR GROUP INC	COM	469814107	434,058	3,983,647	SH		SOLE		3,983,647	0	0
LIBERTY BROADBAND CORP	COM SER A	530307107	152,095	965,195	SH		SOLE		965,195	0	0
LIBERTY BROADBAND CORP	COM SER C	530307305	330,813	2,088,860	SH		SOLE		2,088,860	0	0
LIBERTY MEDIA CORP DEL	COM SER C FRMLA	531229854	450,114	10,566,059	SH		SOLE		10,566,059	0	0
LIBERTY MEDIA CORP DEL	COM SER A FRMLA	531229870	12,780	336,401	SH		SOLE		336,401	0	0
MASTERCARD INCORPORATED	CL A	57636Q104	342,580	959,770	SH		SOLE		959,770	0	0
MOHAWK INDS INC	COM	608190104	1,527	10,833	SH		SOLE		10,833	0	0
Netflix Com Inc	COM	64110L106	379,254	701,374	SH		SOLE		701,374	0	0
PROCTER AND GAMBLE CO	COM	742718109	452	3,246	SH		SOLE		3,246	0	0
PROGRESSIVE CORP	COM	743315103	205	2,076	SH		SOLE		2,076	0	0
SCHWAB CHARLES CORP	COM	808513105	495,100	9,334,460	SH		SOLE		9,334,460	0	0
SINCLAIR BROADCAST GROUP INC	CL A	829226109	679	21,317	SH		SOLE		21,317	0	0
TAIWAN SEMICONDUCTOR MFG LTD	SPONSORED ADS	874039100	729,464	6,689,879	SH		SOLE		6,689,879	0	0
UNION PAC CORP	COM	907818108	428	2,057	SH		SOLE		2,057	0	0
Unitedhealth Group Inc	COM	91324P102	644,416	1,837,617	SH		SOLE		1,837,617	0	0
VISA INC	COM CL A	92826C839	113,927	520,855	SH		SOLE		520,855	0	0
WAYFAIR INC	CL A	94419L101	404,834	1,792,809	SH		SOLE		1,792,809	0	0