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

OMB APPROVAL
OMB Number: 3235-0006
Expires: July 31, 2015
Estimated average burden
hours per response: 23.8

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 347,058 982,250 SH SOLE 982,250 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 316,015 422 SH SOLE 422 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 241,148 481,920 SH SOLE 481,920 0 0
CABLE ONE INC COM 12685J105 9,689 182,439 SH SOLE 182,439 0 0
MARKEL GROUP INC COM 570535104 124,588 63,793 SH SOLE 63,793 0 0
PUBMATIC INC COM CL A 74467Q103 44,594 3,398,904 SH SOLE 3,398,904 0 0