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
ALIBABA GROUP HLDG LTD	SPONSORED ADS	01609W102	795	3,505	SH		SOLE		3,505	0	0
ALPHABET INC	CAP STK CL C	02079K107	442,432	213,877	SH		SOLE		213,877	0	0
ALPHABET INC	CAP STK CL A	02079K305	436,260	211,518	SH		SOLE		211,518	0	0
AMAZON COM INC	COM	023135106	2,095	677	SH		SOLE		677	0	0
ANGI INC	COM CL A NEW	00183L102	156	11,972	SH		SOLE		11,972	0	0
ANTHEM INC	COM	036752103	420,634	1,171,845	SH		SOLE		1,171,845	0	0
ARISTA NETWORKS INC	COM	040413106	433,448	1,435,782	SH		SOLE		1,435,782	0	0
BERKSHIRE HATHAWAY INC DEL	CL B NEW	084670702	158,723	621,299	SH		SOLE		621,299	0	0
BERKSHIRE HATHAWAY INC DEL	CL A	084670108	310,876	806	SH		SOLE		806	0	0
BUILDERS FIRSTSOURCE INC	COM	12008R107	3,317	71,523	SH		SOLE		71,523	0	0
CARMAX INC	COM	143130102	903,856	6,813,324	SH		SOLE		6,813,324	0	0
CREDIT ACCEP CORP MICH	COM	225310101	583,852	1,620,775	SH		SOLE		1,620,775	0	0
DISNEY WALT CO	COM	254687106	502,736	2,724,559	SH		SOLE		2,724,559	0	0
EQUITABLE HLDGS INC	COM	29452E101	1,020	31,259	SH		SOLE		31,259	0	0
EXPEDITORS INTL WASH INC	COM	302130109	10,999	102,132	SH		SOLE		102,132	0	0
FACEBOOK INC	CL A	30303M102	741,278	2,516,818	SH		SOLE		2,516,818	0	0
FIDELITY NATL INFORMATION SV	COM	31620M106	269,307	1,915,276	SH		SOLE		1,915,276	0	0
GTT COMMUNICATIONS INC	COM	362393100	44	24,100	SH		SOLE		24,100	0	0
INTERCONTINENTAL EXCHANGE IN	COM	45866F104	382,407	3,424,133	SH		SOLE		3,424,133	0	0
INTERNATIONAL MNY EXPRESS IN	COM	46005L101	169	11,262	SH		SOLE		11,262	0	0
JACOBS ENGR GROUP INC	COM	469814107	502,898	3,890,293	SH		SOLE		3,890,293	0	0
LIBERTY BROADBAND CORP	COM SER C	530307305	422,313	2,812,608	SH		SOLE		2,812,608	0	0
LIBERTY BROADBAND CORP	COM SER A	530307107	138,405	953,528	SH		SOLE		953,528	0	0
LIBERTY MEDIA CORP DEL	COM SER A FRMLA	531229870	12,585	329,268	SH		SOLE		329,268	0	0
LIBERTY MEDIA CORP DEL	COM SER C FRMLA	531229854	452,151	10,444,692	SH		SOLE		10,444,692	0	0
MASTERCARD INCORPORATED	CL A	57636Q104	179,343	503,701	SH		SOLE		503,701	0	0
MICRON TECHNOLOGY INC	COM	595112103	469,731	5,325,143	SH		SOLE		5,325,143	0	0
MOHAWK INDS INC	COM	608190104	2,083	10,833	SH		SOLE		10,833	0	0
NETFLIX INC	COM	64110L106	362,089	694,109	SH		SOLE		694,109	0	0
PRIMERICA INC	COM	74164M108	207	1,400	SH		SOLE		1,400	0	0
SCHWAB CHARLES CORP	COM	808513105	595,629	9,138,218	SH		SOLE		9,138,218	0	0
SINCLAIR BROADCAST GROUP INC	CL A	829226109	609	20,802	SH		SOLE		20,802	0	0
STELLANTIS N.V	SHS	N82405106	858	48,219	SH		SOLE		48,219	0	0
TAIWAN SEMICONDUCTOR MFG LTD	SPONSORED ADS	874039100	700,294	5,920,645	SH		SOLE		5,920,645	0	0
UNITEDHEALTH GROUP INC	COM	91324P102	699,175	1,879,149	SH		SOLE		1,879,149	0	0
VISA INC	COM CL A	92826C839	77,046	363,886	SH		SOLE		363,886	0	0
WAYFAIR INC	CL A	94419L101	415,166	1,319,033	SH		SOLE		1,319,033	0	0