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
ALIBABA GROUP HLDG LTD SPONSORED ADS 01609W102 10,772 47,500 SH   SOLE   47,500 0 0
ALPHABET INC CAP STK CL A 02079K305 1,953 800 SH   SOLE   800 0 0
AMERICAN EXPRESS CO COM 025816109 34,698 210,000 SH   SOLE   210,000 0 0
BK OF AMERICA CORP COM 060505104 31,658 767,845 SH   SOLE   767,845 0 0
BERKSHIRE HATHAWAY INC DEL CL A 084670108 12,558 30 SH   SOLE   30 0 0
BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 39,076 140,600 SH   SOLE   140,600 0 0
DAILY JOURNAL CORP COM 233912104 3,893 11,500 SH   SOLE   11,500 0 0
FERRARI N V COM N3167Y103 16,506 80,000 SH   SOLE   80,000 0 0
MASTERCARD INC CL A 57636Q104 24,005 65,750 SH   SOLE   65,750 0 0
MICRON TECHNOLOGY INC COM 595112103 16,996 200,000 SH   SOLE   200,000 0 0
MOODYS CORP COM 615369105 9,784 27,000 SH   SOLE   27,000 0 0
SERITAGE GROWTH PPTYS CL A 81752R100 9,200 500,000 SH   SOLE   500,000 0 0
TWITTER INC COM 90184L102 2,064 30,000 SH   SOLE   30,000 0 0