The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete. | |||||||||||||||||
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F INFORMATION TABLE |
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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 | (x$1000) | PRN AMT | PRN | CALL | DISCRETION | MANAGER | SOLE | SHARED | NONE |
| ALIBABA GROUP HLDG LTD | SPONSORED ADS | 01609W102 | 162,390 | 552,383 | SH | SOLE | 552,383 | 0 | 0 | ||
| ALPHABET INC | CAP STK CL A | 02079K305 | 63,178 | 43,107 | SH | SOLE | 43,107 | 0 | 0 | ||
| ALPHABET INC | CAP STK CL C | 02079K107 | 63,165 | 42,981 | SH | SOLE | 42,981 | 0 | 0 | ||
| AMAZON COM INC | COM | 023135106 | 190,372 | 60,460 | SH | SOLE | 60,460 | 0 | 0 | ||
| APPLE INC | COM | 037833100 | 232,104 | 2,004,176 | SH | SOLE | 2,004,176 | 0 | 0 | ||
| BERKSHIRE HATHAWAY INC DEL | CL B NEW | 084670702 | 10,030,411 | 47,104,399 | SH | SOLE | 47,104,399 | 0 | 0 | ||
| BOSTON PROPERTIES INC | COM | 101121101 | 88,275 | 1,099,310 | SH | SOLE | 1,099,310 | 0 | 0 | ||
| CANADIAN NATL RY CO | COM | 136375102 | 1,823,327 | 17,126,874 | SH | SOLE | 17,126,874 | 0 | 0 | ||
| CATERPILLAR INC DEL | COM | 149123101 | 1,679,557 | 11,260,857 | SH | SOLE | 11,260,857 | 0 | 0 | ||
| COCA-COLA FEMSA SAB DE CV | SPONSORD ADR REP | 191241108 | 253,063 | 6,214,719 | SH | SOLE | 6,214,719 | 0 | 0 | ||
| CROWN CASTLE INTL CORP NEW | COM | 22822V101 | 887,928 | 5,332,900 | SH | SOLE | 5,332,900 | 0 | 0 | ||
| ECOLAB INC | COM | 278865100 | 872,587 | 4,366,426 | SH | SOLE | 4,366,426 | 0 | 0 | ||
| FEDEX CORP | COM | 31428X106 | 760,848 | 3,024,999 | SH | SOLE | 3,024,999 | 0 | 0 | ||
| GRUPO TELEVISA SA | SPON ADR REP ORD | 40049J206 | 104,313 | 16,879,104 | SH | SOLE | 16,879,104 | 0 | 0 | ||
| LIBERTY GLOBAL PLC | SHS CL A | G5480U104 | 44,531 | 2,119,515 | SH | SOLE | 2,119,515 | 0 | 0 | ||
| LIBERTY GLOBAL PLC | SHS CL C | G5480U120 | 74,734 | 3,639,349 | SH | SOLE | 3,639,349 | 0 | 0 | ||
| LIBERTY LATIN AMERICA LTD | COM CL A | G9001E102 | 3,056 | 370,424 | SH | SOLE | 370,424 | 0 | 0 | ||
| LIBERTY LATIN AMERICA LTD | COM CL C | G9001E128 | 7,613 | 935,282 | SH | SOLE | 935,282 | 0 | 0 | ||
| SCHRODINGER INC | COM | 80810D103 | 236,679 | 4,981,664 | SH | SOLE | 4,981,664 | 0 | 0 | ||
| TWITTER INC | COM | 90184L102 | 12,123 | 272,420 | SH | SOLE | 272,420 | 0 | 0 | ||
| UBER TECHNOLOGIES INC | COM | 90353T100 | 976 | 26,767 | SH | SOLE | 26,767 | 0 | 0 | ||
| UNITED PARCEL SERVICE INC | CL B | 911312106 | 754,056 | 4,525,329 | SH | SOLE | 4,525,329 | 0 | 0 | ||
| WALMART INC | COM | 931142103 | 1,623,376 | 11,603,000 | SH | SOLE | 11,603,000 | 0 | 0 | ||
| WASTE MGMT INC DEL | COM | 94106L109 | 2,108,773 | 18,633,672 | SH | SOLE | 18,633,672 | 0 | 0 | ||