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
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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 FIGI (to the nearest dollar) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
Abbott Laboratories COM 002824100   1,021,293 7,625 SH   SOLE   7,625 0 0
Abbvie Inc COM 00287Y109   764,082 3,300 SH   SOLE   3,300 0 0
Alphabet Inc. Class A COM 02079K305   11,822,925 48,634 SH   SOLE   47,594 0 1,040
Alphabet Inc. Class C COM 02079K107   1,416,730 5,817 SH   SOLE   5,817 0 0
Aon PLC F Class A COM G0403H108   677,502 1,900 SH   SOLE   1,900 0 0
Apple Inc COM 037833100   471,066 1,850 SH   SOLE   1,850 0 0
Applied Materials COM 038222105   24,601,354 120,159 SH   SOLE   114,637 0 5,522
Bank Of NY Mellon Co COM 064058100   958,848 8,800 SH   SOLE   8,800 0 0
Berkshire Hathaway Class B COM 084670702   67,919,169 135,098 SH   SOLE   132,807 0 2,291
Berkshire Hathaway Incorporated Class A COM 084670108   754,200 1 SH   SOLE   1 0 0
Brown & Brown Inc COM 115236101   10,185,594 108,600 SH   SOLE   106,525 0 2,075
Cadence Design Systems COM 127387108   15,606,131 44,429 SH   SOLE   42,130 0 2,299
Charles Schwab Corp. COM 808513105   483,269 5,062 SH   SOLE   5,062 0 0
Cloudflare Inc COM 18915M107   6,128,047 28,557 SH   SOLE   28,098 0 459
Constellation Software COM 21037X100   844,386 311 SH   SOLE   311 0 0
Credit Accept Corp COM 225310101   228,329 489 SH   SOLE   489 0 0
Eli Lilly & Co COM 532457108   222,796 292 SH   SOLE   292 0 0
Eurofins Scientific COM L31839134   538,853 7,433 SH   SOLE   7,433 0 0
Exxon Mobil Corp COM 30231G102   627,679 5,567 SH   SOLE   5,567 0 0
Fairfax Finl HL F COM 303901102   426,790 244 SH   SOLE   244 0 0
Formula One Series A (Liberty Media Corp) COM 531229771   272,901 2,866 SH   SOLE   2,866 0 0
Formula One Series C (Liberty Media Corp) COM 531229755   616,151 5,899 SH   SOLE   5,899 0 0
Greif Inc Class A COM 397624107   241,280 4,000 SH   SOLE   4,000 0 0
IBM Corp COM 459200101   423,240 1,500 SH   SOLE   1,500 0 0
Idexx Labs Inc COM 45168D104   20,896,814 32,708 SH   SOLE   31,010 0 1,698
Inercontinental Exchange COM 45866F104   676,616 4,016 SH   SOLE   4,016 0 0
Jacobs Solutions Inc COM 46982L108   389,486 2,599 SH   SOLE   2,599 0 0
Johnson & Johnson COM 478160104   465,775 2,512 SH   SOLE   2,512 0 0
JPMorgan Chase & Co COM 46625H100   352,020 1,116 SH   SOLE   1,116 0 0
KKR & Co Inc COM 48251W104   13,747,670 105,792 SH   SOLE   103,798 0 1,994
Labcorp, Inc COM 504922105   2,634,924 9,179 SH   SOLE   8,979 0 200
Lowes Companies Inc COM 548661107   4,340,878 17,273 SH   SOLE   17,273 0 0
Martin Marietta Matr COM 573284106   5,339,102 8,471 SH   SOLE   7,851 0 620
Mastercard Inc Class A COM 57636Q104   284,405 500 SH   SOLE   500 0 0
Meta Platforms COM 30303M102   716,021 975 SH   SOLE   975 0 0
Microsoft Corp COM 594918104   715,807 1,382 SH   SOLE   1,382 0 0
Mohawk Industries COM 608190104   1,073,517 8,327 SH   SOLE   8,327 0 0
Oracle Corp COM 68389X105   25,349,286 90,134 SH   SOLE   85,025 0 5,109
Pepsico Inc COM 713448108   5,364,387 38,197 SH   SOLE   23,127 0 15,070
Philip Morris Intl COM 718172109   246,868 1,522 SH   SOLE   1,522 0 0
Procore Technologies Inc COM 74275K108   7,241,248 99,304 SH   SOLE   94,515 0 4,789
Progressive Co. COM 743315103   17,806,824 72,107 SH   SOLE   69,734 0 2,373
Rolls-Royce Holdings COM G76225104   262,405 16,411 SH   SOLE   16,411 0 0
Skywater Technology Inc COM 83089J108   5,452,023 292,177 SH   SOLE   273,982 0 18,195
TJX Companies Inc COM 872540109   200,332 1,386 SH   SOLE   1,386 0 0
UnitedHealth Group Inc COM 91324P102   3,746,160 10,849 SH   SOLE   10,689 0 160
US Bancorp COM 902973304   12,246,451 250,695 SH   SOLE   244,772 0 5,923
Vanguard S&P 500 ETF ETF 922908363   630,087 1,026 SH   SOLE   1,026 0 0
Visa Inc Class A COM 92826C839   331,178 970 SH   SOLE   970 0 0
W S F S Finl Co COM 929328102   812,779 15,071 SH   SOLE   15,071 0 0
Wells Fargo & Co. COM 949746101   20,793,814 248,077 SH   SOLE   243,189 0 4,888
Yum Brands Inc COM 988498101   708,168 4,659 SH   SOLE   4,659 0 0
Zoetis Inc Class A COM 98978V103   6,274,641 42,883 SH   SOLE   40,583 0 2,300