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

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COLUMN 1COLUMN 2COLUMN 3COLUMN 4COLUMN 5COLUMN 6COLUMN 7COLUMN 8
VALUESHRS ORSH/PUT/INVESTMENTOTHERVOTING AUTHORITY
NAME OF ISSUERTITLE OF CLASSCUSIP(x$1000)PRN AMTPRNCALLDISCRETIONMANAGERSOLESHAREDNONE
ALPHABET INCCAP STK CL A02079K30544,45621,554SH SOLE 21,55400
ALPHABET INCCAP STK CL C02079K10744,45721,491SH SOLE 21,49100
BERKSHIRE HATHAWAY INC DELCL B NEW0846707029,479,06137,104,399SH SOLE 37,104,39900
CANADIAN NATL RY COCOM1363751021,612,96713,907,283SH SOLE 13,907,28300
CATERPILLAR INCCOM1491231012,355,04710,156,756SH SOLE 10,156,75600
COCA-COLA FEMSA SAB DE CVSPONSORD ADR REP191241108287,1206,214,719SH SOLE 6,214,71900
COUPANG INCCL A22266T109282,0005,714,285SH SOLE 5,714,28500
CROWN CASTLE INTL CORP NEWCOM22822V101875,5705,086,680SH SOLE 5,086,68000
ECOLAB INCCOM278865100934,7214,366,426SH SOLE 4,366,42600
FEDEX CORPCOM31428X106424,2741,493,712SH SOLE 1,493,71200
GRUPO TELEVISA SASPON ADR REP ORD40049J206149,54916,879,104SH SOLE 16,879,10400
LIBERTY GLOBAL PLCSHS CL AG5480U1049,771380,772SH SOLE 380,77200
LIBERTY GLOBAL PLCSHS CL CG5480U12012,962507,517SH SOLE 507,51700
SCHRODINGER INCCOM80810D103532,6316,981,664SH SOLE 6,981,66400
UNITED PARCEL SERVICE INCCL B911312106476,2762,801,790SH SOLE 2,801,79000
WALMART INCCOM9311421031,032,4047,600,706SH SOLE 7,600,70600
WASTE MGMT INC DELCOM94106L1092,404,11618,633,672SH SOLE 18,633,67200