Ruane Cunniff LP

As of Q2 2026, Ruane Cunniff LP reported 54 long-equity positions worth $6.43B in aggregate.

Copy-investor backtest

Latest quarter: +7.42%
1-year: +18.15%
3-year: +55.54%
5-year: +39.56%
3-year vs S&P 500: -17.71%
5-year vs S&P 500: -34.13%
5-year top 5: +41.15%

Return from mechanically copying the disclosed 13F equity portfolio after each filing and rebalancing at the next. The vs S&P 500 figures subtract SPY over that manager's own rebalance dates, so both sides cover the same days; both are price return, excluding dividends. Method & limitations.

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Filing period

Updated 2026-09-19 from SEC 13F data.

Live quotes available for 35 of 42 rows. Rows without a quote are marked unavailable.


1	GOOG	ALPHABET INC	12.04%	Add +0.6%	752,617	$917.44M	$1219.00	No quote
2	KMX	CARMAX INC	11.34%	Reduce -1.0%	9,823,746	$864.49M	$88.00	No quote
3	BRK-A	BERKSHIRE HATHAWAY INC DEL	9.08%	Reduce -1.6%	2,219	$691.96M	$311831.91	No quote
4	JEC	JACOBS ENGR GROUP INC	6.99%	Reduce -0.9%	5,821,512	$532.67M	No quote	No quote
5	FWONK	LIBERTY MEDIA CORP DELAWARE	6.60%	Reduce -1.4%	12,095,236	$503.04M	$41.59	No quote
6	CACC	CREDIT ACCEP CORP MICH	6.53%	Reduce -0.7%	1,079,509	$497.99M	$461.31	No quote
7	META	FACEBOOK INC	5.41%	Add +9.6%	2,315,139	$412.28M	$178.08	No quote
8	MA	MASTERCARD INC	5.06%	Reduce -29.6%	1,419,626	$385.53M	$271.57	No quote
9	AMZN	AMAZON COM INC	4.90%	Reduce -0.9%	215,250	$373.66M	$1735.91	No quote
10	SCHW	THE CHARLES SCHWAB CORPORATI	4.78%	Reduce -0.7%	8,703,050	$364.05M	$41.83	No quote
11	BKNG	BOOKING HLDGS INC	4.51%	Reduce -0.8%	175,009	$343.47M	$1962.61	No quote
12	GOOGL	ALPHABET INC	4.46%	Reduce -0.1%	278,288	$339.83M	$1221.14	No quote
13	LBRDK	LIBERTY BROADBAND CORP	4.27%	Reduce -1.0%	3,107,983	$325.31M	$104.67	No quote
14	W	WAYFAIR INC	4.24%	New	2,881,046	$323.02M	$112.12	No quote
15	BRK-B	BERKSHIRE HATHAWAY INC DEL	3.71%	Reduce -0.9%	1,359,451	$282.79M	$208.02	No quote
16	MHK	MOHAWK INDS INC	2.29%	Reduce -0.6%	1,405,473	$174.38M	$124.07	No quote
17	V	VISA INC	1.93%	Reduce -40.9%	855,103	$147.09M	$172.01	No quote
18	LBRDA	LIBERTY BROADBAND CORP	1.40%	Reduce -0.8%	1,023,590	$106.99M	$104.52	No quote
19	FWONA	LIBERTY MEDIA CORP DELAWARE	0.19%	Reduce -0.1%	372,465	$14.75M	$39.59	No quote
20	EXPD	EXPEDITORS INTL WASH INC	0.10%	-	102,132	$7.59M	$74.29	No quote
21	BLDR	BUILDERS FIRSTSOURCE INC	0.02%	Reduce -0.7%	72,991	$1.5M	$20.58	No quote
22	AEP	AMERICAN ELEC PWR CO INC	0.02%	Reduce -5.5%	12,366	$1.16M	$93.72	No quote
23	PG	PROCTER & GAMBLE CO	0.01%	Reduce -16.7%	9,136	$1.14M	$124.34	No quote
24	EIX	EDISON INTL	0.01%	Reduce -23.5%	14,480	$1.09M	No quote	No quote
25	KO	COCA COLA CO	0.01%	Reduce -14.7%	19,531	$1.06M	$54.43	No quote
26	UNP	UNION PACIFIC CORP	0.01%	Reduce -5.7%	6,351	$1.03M	$162.02	No quote
27	TJX	TJX COS INC NEW	0.01%	Reduce -1.1%	17,181	$958K	$55.76	No quote
28	ANET	ARISTA NETWORKS INC	0.01%	-	3,600	$860K	$238.89	No quote
29	COST	COSTCO WHSL CORP NEW	0.01%	Reduce -2.6%	2,415	$696K	$288.20	No quote
30	FCAU	FIAT CHRYSLER AUTOMOBILES N	0.01%	Reduce -1.1%	37,738	$489K	No quote	No quote
31	JD	JD COM INC	0.00%	Reduce -2.5%	12,986	$366K	$28.18	No quote
32	BABA	ALIBABA GROUP HLDG LTD	0.00%	New	2,038	$341K	$167.32	No quote
33	IDXX	IDEXX LABS INC	0.00%	-	1,146	$312K	$272.25	No quote
34	SAIL	SAILPOINT TECHNLGIES HLDGS I	0.00%	-	14,000	$262K	$18.71	No quote
35	WFC	WELLS FARGO CO NEW	0.00%	Reduce -5.6%	4,624	$233K	$50.39	No quote
36	GTT	GTT COMMUNICATIONS INC	0.00%	New	24,100	$227K	No quote	No quote
37	AAPL	APPLE INC	0.00%	New	1,000	$224K	$224.00	No quote
38	JPM	JPMORGAN CHASE & CO	0.00%	New	1,708	$201K	$117.68	No quote
39	RMNI	RIMINI STR INC DEL	0.00%	Reduce -6.1%	10,119	$44K	$4.35	No quote
40	WTRH	WAITR HLDGS INC	0.00%	Add +88.8%	28,096	$36K	No quote	No quote
42	XRAY	DENTSPLY SIRONA INC	-	Sold	0	$0	No quote	No quote
41	AABA	ALTABA INC	-	Sold	0	$0	No quote	No quote