Top 10 positions in Tom Gayner's 12-31-2019 portfolio ($7.2bb):

StockPort. Allocation (%)
$KMX / CarMax 5.98%
$BRK.A / Berkshire Hathaway 5.21%
$BRK.B / Berkshire Hathaway 4.80%
$BAM / Brookfield Asset Management4.65%
$DIS / The Walt Disney Co. 3.72%
$MAR / Marriott Int. 3.33% https://t.co/3ZSTRzLLdI