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
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
Berkshire Hathaway Hld B Common Stock 084670702 21,139,604 160,100 SH   SOLE   160,100 0 0
Berkshire Hathaway Inc. CL "A" Common Stock 084670108 1,384,600 7 SH   SOLE   7 0 0
Agnico Eagle Common Stock 268648102 298,935 11,375 SH   SOLE   11,375 0 0
Credit Acceptance Corporation Common Stock 225310101 16,503,724 77,113 SH   SOLE   77,113 0 0
D R Horton Inc Common Stock 23331A109 5,098,696 159,185 SH   SOLE   159,185 0 0
Novagold Resources Inc New Common Stock 66987E206 1,430,726 339,840 SH   SOLE   339,840 0 0
Blackstone Group L.P. Common Stock 09253U108 6,128,119 209,580 SH   SOLE   209,580 0 0
Maxim Integrated Products Common Stock 57772K101 2,553,600 67,200 SH   SOLE   67,200 0 0
Tractor Supply Co. Common Stock 892356106 4,599,900 53,800 SH   SOLE   53,800 0 0
Johnson & Johnson Common Stock 478160104 1,820,712 17,725 SH   SOLE   17,725 0 0
Textura Corporation Common Stock 883211104 1,562,888 72,423 SH   SOLE   72,423 0 0
Goldcorp Inc. Common Stock 380956409 321,946 27,850 SH   SOLE   27,850 0 0
Roper Industries Common Stock 776696106 2,899,042 15,275 SH   SOLE   15,275 0 0
Enterprise Prods Partners LP Common Stock 293792107 8,233,307 321,865 SH   SOLE   321,865 0 0
Portfolio Recovery As. Common Stock 73640Q105 2,374,357 68,445 SH   SOLE   68,445 0 0
SPDR Gold Trust Common Stock 78463V107 1,980,296 19,518 SH   SOLE   19,518 0 0
INTUIT Common Stock 461202103 2,111,227 21,878 SH   SOLE   21,878 0 0
Transdigm Group Inc. Common Stock 893641100 1,122,832 4,915 SH   SOLE   4,915 0 0
Knight Therapeutics In Common Stock 499053106 1,780,849 325,400 SH   SOLE   325,400 0 0
Central Fund of Canada Ltd Common Stock 153501101 149,850 15,000 SH   SOLE   15,000 0 0
Sprott Physical Gold Trust Common Stock 85207H104 570,942 65,400 SH   SOLE   65,400 0 0
Schlumberger Common Stock 806857108 627,750 9,000 SH   SOLE   9,000 0 0
Red Hat, Inc Common Stock 756577102 995,790 12,025 SH   SOLE   12,025 0 0
American International Group Common Stock 026874784 2,289,172 36,940 SH   SOLE   36,940 0 0
EOG Resources Common Stock 26875P101 261,923 3,700 SH   SOLE   3,700 0 0