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 |
| APPLE INC | COM | 037833100 | 18,154 | 115,066 | SH | SOLE | 115,066 | 0 | 0 | ||
| BERKSHIRE HATHAWAY INC DEL | CL B NEW | 084670702 | 20,175 | 98,812 | SH | SOLE | 98,812 | 0 | 0 | ||
| BLACKROCK INC | COM | 09247X101 | 18,892 | 48,091 | SH | SOLE | 48,091 | 0 | 0 | ||
| CECO ENVIRONMENTAL CORP | COM | 125141101 | 3,868 | 573,000 | SH | SOLE | 573,000 | 0 | 0 | ||
| CHARTER COMMUNICATIONS INC N | CL A | 16119P108 | 19,183 | 67,312 | SH | SOLE | 67,312 | 0 | 0 | ||
| FIRSTSERVICE CORP NEW | SUB VTG SH | 33767E103 | 2,707 | 39,440 | SH | SOLE | 39,440 | 0 | 0 | ||
| GENPACT LIMITED | SHS | G3922B107 | 11,883 | 440,269 | SH | SOLE | 440,269 | 0 | 0 | ||
| MASTERCARD INCORPORATED | CL A | 57636Q104 | 2,433 | 12,900 | SH | SOLE | 12,900 | 0 | 0 | ||
| MSCI INC | COM | 55354G100 | 23,853 | 161,795 | SH | SOLE | 161,795 | 0 | 0 | ||
| SHERWIN WILLIAMS CO | COM | 824348106 | 23,524 | 59,790 | SH | SOLE | 59,790 | 0 | 0 | ||
| SITEONE LANDSCAPE SUPPLY INC | COM | 82982L103 | 18,021 | 326,064 | SH | SOLE | 326,064 | 0 | 0 | ||
| VISA INC | COM CL A | 92826C839 | 25,754 | 195,190 | SH | SOLE | 195,190 | 0 | 0 | ||