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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
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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 STKCL C COM 02079K107 243,557 689,320 SH SOLE 689,320 0 0
ALPHABET INC CL A COM 02079K305 4,763 13,327 SH SOLE 13,327 0 0
BERKSHIRE HATHAWAY INC CL A COM 084670108 2,995 4 SH SOLE 4 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW COM 084670702 37,244 74,430 SH SOLE 74,430 0 0
COSTCO WHOLESALE CORP COM 22160K105 126,542 135,271 SH SOLE 135,271 0 0
FASTENAL CO COM 311900104 82,574 1,719,217 SH SOLE 1,719,217 0 0
MARKEL CORP COM 570535104 88,678 45,406 SH SOLE 45,406 0 0
MARTIN MARIETTA MATLS INC COM 573284106 79,901 138,549 SH SOLE 138,549 0 0