AMERICAN EXPRESS STOCK 025816109 10542 63912 SH SOLE 63912 0 0 APPLE STOCK 037833100 15120 91692 SH SOLE 91692 0 0 BERKSHIRE HATHAWAY B STOCK 084670702 14356 46494 SH SOLE 46494 0 0 CARMAX STOCK 143130102 8248 128306 SH SOLE 128306 0 0 CHARTER COMMUNICATIONS STOCK 16119P108 10474 29289 SH SOLE 29289 0 0 CIGNA STOCK 125523100 13572 53113 SH SOLE 53113 0 0 DANAHER STOCK 235851102 6606 26211 SH SOLE 26211 0 0 HEINEKEN HOLDINGS STOCK N39338194 5708 62040 SH SOLE 62040 0 0 LABCORP STOCK 50540R409 7951 34658 SH SOLE 34658 0 0 LIBERTY BROADBAND A STOCK 530307107 197 2405 SH SOLE 2405 0 0 LIBERTY BROADBAND C STOCK 530307305 1043 12772 SH SOLE 12772 0 0 LIBERTY SIRIUS A STOCK 531229409 210 7469 SH SOLE 7469 0 0 LIBERTY SIRIUS C STOCK 531229607 7344 262370 SH SOLE 262370 0 0 MARKEL STOCK 570535104 13825 10823 SH SOLE 10823 0 0 PARKER HANNIFIN STOCK 701094104 10956 32597 SH SOLE 32597 0 0 VONTIER STOCK 928881101 11008 402626 SH SOLE 402626 0 0