| DUECK BROS. CONSTRUCTION (1991) LTD. | — | BC0409009 | 1991-07-10 | Inactive | |
| DUECK BROS. CONSTRUCTION LTD. | — | BC0071769 | 1966-11-15 | Inactive | |
| DUECK BROS. FORMWORK LTD. | — | BC0778395 | 2006-12-27 | Active | |
| DUECK BROTHERS HOLDING CO. LTD. | — | BC0022773 | — | Inactive | |
| DUECK BUILDING SUPPLIES LTD. | — | BC0156608 | 1977-01-11 | Inactive | |
| DUECK CHEVROLET BUICK CADILLAC GMC LIMITED | — | A0056103 | 2002-01-24 | Active | |
| DUECK CHEVROLET OLDSMOBILE CADILLAC LIMITED | — | A0028500 | — | Inactive | |
| DUECK CHEVROLET OLDSMOBILE CADILLAC LIMITED | — | BC0337795 | 1987-12-16 | Inactive | |
| DUECK CHEVROLET OLDSMOBILE CADILLAC LIMITED | — | C0326922 | — | Inactive | |
| DUECK CHEVROLET OLDSMOBILE CADILLAC LIMITED | — | BC0040400 | 1957-12-11 | Inactive | |
| DUECK CLIVEDEN LAND HOLDINGS LTD. | — | BC1100589 | 2016-12-16 | Active | |
| DUECK COLORADO PROPERTIES LTD. | — | BC0285786 | 1984-12-05 | Inactive | |
| DUECK CONTRACTING | — | FM0661078 | 2015-05-21 | Active | |
| DUECK DEVELOPMENT CORPORATION | — | BC0043081 | 1958-11-13 | Inactive | |
| DUECK DISTRIBUTORS | — | FM0412713 | 2005-12-13 | Active | |
| DUECK DISTRIBUTORS LTD. | — | BC0113171 | — | Inactive | |
| DUECK DOWNTOWN | — | FM0535107 | 2010-07-29 | Active | |
| DUECK DOWNTOWN CHEVROLET BUICK GMC LIMITED | — | BC0682608 | 2003-12-03 | Active | |
| DUECK DOWNTOWN LAND HOLDINGS LTD. | — | BC1312461 | 2021-06-25 | Active | |
| DUECK DRYWALL | — | FM0415721 | 2006-01-27 | Active | |
| DUECK ELECTRIC | — | FM0100966 | 1989-09-19 | Active | |
| DUECK ELECTRIC LTD. | — | BC0796005 | 2007-07-03 | Active | |
| DUECK ENTERPRISES INC. | — | BC0902398 | 2011-02-08 | Inactive | |
| DUECK ENTERPRISES LIMITED | — | BC0074631 | 1967-06-06 | Inactive | |
| DUECK EQUIP INC. | — | A0064913 | 2005-04-29 | Inactive | |
| DUECK FALKLAND FARMS | — | FM0831423 | 2021-02-01 | Active | |
| DUECK FINANCIAL PLANNING | — | FM0238452 | 1998-04-24 | Active | |
| DUECK HOLDINGS LTD. | — | BC0034842 | 1955-10-12 | Inactive | |
| DUECK INDUSTRIAL BUILDING LIMITED | — | BC0551475 | 1997-10-03 | Inactive | |
| DUECK INDUSTRIES LTD. | — | BC0022920 | 1947-12-30 | Inactive | |
| DUECK INVESTMENT CORPORATION | — | BC0295276 | 1985-07-12 | Inactive | |
| DUECK INVESTMENTS LIMITED | — | BC0040399 | — | Inactive | |
| DUECK ISUZU TRUCKS VANCOUVER LIMITED | — | BC0978809 | 2013-08-26 | Active | |
| DUECK JANITORIAL | — | FM0102536 | 1989-11-20 | Active | |
| DUECK MANAGEMENT LIMITED | — | BC0335504 | 1987-10-29 | Active | |
| DUECK MANUFACTURING | — | FM0783789 | 2019-07-30 | Active | |
| DUECK MANUFACTURING INC. | — | BC1315098 | 2021-07-13 | Active | |
| DUECK MARINE LAND HOLDINGS LTD. | — | BC1455198 | 2023-12-14 | Active | |
| DUECK MARKETING GROUP | — | FM0518642 | 2010-01-04 | Active | |
| DUECK MOTORS LEASING LTD. | — | BC0046549 | 1959-12-15 | Inactive | |
| DUECK ON BROADWAY LIMITED | — | BC0037668 | 1956-11-13 | Active | |
| DUECK ON MARINE | — | FM0535105 | 2010-07-29 | Active | |
| DUECK PACIFIC HOLDINGS LTD. | — | BC0461995 | 1994-01-07 | Inactive | |
| DUECK PILOT CAR SERVICE | — | FM0825752 | 2020-12-01 | Active | |
| DUECK PONTIAC BUICK GMC | — | FM0322070 | 2002-04-29 | Inactive | |
| DUECK PONTIAC BUICK GMC | — | FM0363840 | 2004-01-23 | Active | |
| DUECK PONTIAC BUICK GMC LIMITED | — | A0047225 | — | Inactive | |
| DUECK PROPERTIES LIMITED | — | BC0473004 | 1994-05-17 | Active | |
| DUECK PROPERTIES LTD. | — | BC0225273 | 1981-01-26 | Inactive | |
| DUECK RANCH LTD. | — | BC0184720 | 1978-12-29 | Inactive | |
| DUECK READY MIX (1958) LTD. | — | BC0040846 | 1958-02-11 | Inactive | |
| DUECK READY MIX LTD. | — | BC0034657 | 1955-09-07 | Inactive | |
| DUECK RICHMOND | — | FM0535109 | 2010-07-29 | Active | |
| DUECK RICHMOND CHEVROLET BUICK CADILLAC GMC LTD. | — | BC0737843 | 2005-10-17 | Active | |
| DUECK RICHMOND LAND HOLDINGS LTD. | — | BC1455203 | 2023-12-14 | Active | |
| DUECK RIGHT PRODUCTIONS | — | FM0662678 | 2015-06-07 | Active | |
| DUECK ROOFING | — | FM0158648 | 1994-04-13 | Active | |
| DUECK SATPHONE COMMUNICATIONS INC. | — | A0042210 | 1996-01-17 | Inactive | |
| DUECK TAX ADVISORY SERVICES LTD. | — | BC0991207 | 2014-01-16 | Active | |
| DUECK TRUCKING LTD. | — | BC0167892 | 1977-11-10 | Inactive | |
| DUECK U DRIVE LTD. | — | BC0015958 | — | Inactive | |
| DUECK U.S. PROPERTIES LIMITED | — | BC0878351 | 2010-04-13 | Active | |
| DUECK VALLEY HOLDINGS LIMITED | — | BC0985254 | 2013-11-08 | Active | |
| DUECK'S COLLISION 1992 | — | FM0135822 | 1992-10-16 | Active | |
| DUECK'S COMPUTER AID | — | FM0107891 | 1990-05-18 | Active | |
| DUECK'S PAINTING AND RENOVATION | — | FM0537820 | 2010-09-03 | Active | |
| DUECK'S POULTRY FARM LTD. | — | BC0206716 | 1980-03-19 | Active | |
| DUECKMAN ELECTRIC | — | FM0615822 | 2013-09-04 | Active | |
| DUECKMAN MARKETING LTD. | — | BC0253099 | 1982-07-07 | Inactive | |
| DUECKS HOME MEAT SERVICES | — | FM0432118 | 2006-08-27 | Active | |
| DUEDAY STUDIO | — | FM1024753 | 2023-08-31 | Inactive | |
| DUEDOCK TECHNOLOGIES INC. | — | BC1002221 | 2014-05-14 | Inactive | |
| DUEL D.N.A INDUSTRIAL CLEANING | — | FM0403405 | 2005-07-28 | Active | |
| DUEL ENTERPRISES LTD. | — | BC0186438 | 1979-02-09 | Inactive | |
| DUEL FENCING LTD. | — | BC0260830 | 1983-02-28 | Inactive | |
| DUEL INDUSTRIES LTD. | — | BC0110050 | 1972-06-23 | Inactive | |
| DUEL RESOURCES LTD. | — | BC0098519 | — | Inactive | |
| DUELANA GAMES CORP. | — | BC1349154 | 2022-02-21 | Inactive | |
| DUELING GROUNDS THOROUGHBRED RACING CORPORATION | — | A0038428 | 1994-02-03 | Inactive | |
| DUELING HEARTS COUTURE INC. | — | BC0829228 | 2008-07-03 | Inactive | |
| DUELING OAKS RESTAURANT | — | FM0708103 | 2017-01-20 | Active | |
| DUELL COMMUNICATIONS | — | FM0124732 | 1991-11-19 | Active | |
| DUELL DESIGNS LTD. | — | BC0784245 | 2007-03-01 | Inactive | |
| DUELLE JEWELRY | — | FM1031912 | 2023-12-05 | Active | |
| DUELLO HOLDINGS LTD. | — | BC0288379 | 1985-02-12 | Inactive | |
| DUEN SAILING ADVENTURES INC. DUEN AVENTURES A LA VOILE INC. | — | BC0307259 | 1986-04-08 | Active | |
| DUENDE CURATION | — | FM0786666 | 2019-09-04 | Active | |
| DUENDE DESIGN | — | FM0251291 | 1998-12-21 | Active | |
| DUENDE FARM | — | FM0504299 | 2009-06-05 | Active | |
| DUENDE LABS INC. | — | BC1534427 | 2025-04-04 | Active | |
| DUENDE MEDIA | — | FM1057727 | 2024-10-07 | Active | |
| DUENDE MEDIA LTD. | — | BC1586267 | 2026-04-14 | Active | |
| DUENDE MUSIC | — | FM0646036 | 2014-10-31 | Active | |
| DUENDE SALON & BEAUTY BAR INC. | — | BC1257080 | 2020-07-14 | Active | |
| DUENKLER MANAGEMENT CORPORATION | — | A0081395 | 2010-10-07 | Inactive | |
| DUENORTH ENVIRONMENTAL GEOMATICS SERVICES, EDUCATIONAL SERVICES & CARTOGRAPHIC PRODUCTIONS | — | FM0403884 | 2005-08-05 | Active | |
| DUENORTH HELICOPTERS INC. | — | BC0844570 | 2009-01-29 | Active | |
| DUENORTH IMMIGRATION SERVICES INC. | — | C1234814 | 2019-12-21 | Active | |
| DUERICHEN HEATING AND COOLING | — | FM0780594 | 2019-06-20 | Active | |
| DUERKSEN DRYWALL | — | FM0463058 | 2007-10-26 | Active | |
| DUES COMEDENTI CONSTRUCTION | — | FM0735784 | 2017-12-20 | Active | |
| DUESENBERG DESIGN & CONSTRUCTION | — | FM0327693 | 2002-07-18 | Active | |
| DUESENBERG TECHNOLOGIES INC. | — | C0908409 | 2011-04-15 | Active | |
| DUESPAID FITNESS | — | FM1010134 | 2023-02-23 | Active | |
| DUESS DESIGNS | — | FM0414825 | 2006-01-17 | Active | |
| DUESS HOLDINGS LTD. | — | BC0145772 | 1976-02-23 | Active | |
| DUESSENBURG HOMES LTD. | — | BC0357010 | 1988-12-23 | Inactive | |
| DUESTERWALD BUILDING CONTRACTORS LTD. | — | BC0212607 | 1980-07-08 | Inactive | |
| DUET | — | FM1055793 | 2024-09-12 | Active | |
| DUET ACCOUNTING | — | FM0892661 | 2022-10-20 | Active | |
| DUET ADERA PROJECTS LTD. | — | BC1122744 | 2017-06-13 | Inactive | |
| DUET CARDS | — | FM0656001 | 2015-03-19 | Active | |
| DUET CATERING LTD. | — | BC0260576 | 1983-02-22 | Inactive | |
| DUET CONSULTING | — | FM0131528 | 1992-06-30 | Active | |
| DUET ENTERPRISES LTD. | — | BC0682490 | 2003-12-02 | Inactive | |
| DUET FINANCIAL LTD. | — | BC0868142 | 2009-12-07 | Active | |
| DUET FINANCIAL MORTGAGE ARCHITECTS | — | FM0577640 | 2012-03-01 | Active | |
| DUET HOLDINGS INC. | — | BC0399244 | 1990-12-31 | Active | |
| DUET II ADERA PROJECTS LTD. | — | BC1127847 | 2017-07-24 | Inactive | |
| DUET INTRODUCTIONS | — | FM0509620 | 2009-08-25 | Active | |
| DUET INTRODUCTIONS | — | FM0457804 | 2007-08-16 | Active | |
| DUET MATCHMAKERS | — | FM0492816 | 2009-01-02 | Inactive | |
| DUET MEDIA | — | FM0533575 | 2010-07-09 | Active | |
| DUET PRIVATE DINING | — | FM0857976 | 2021-09-14 | Active | |
| DUET SALON AND SPA | — | FM0556241 | 2011-05-05 | Active | |
| DUET SERVICES LIMITED | — | BC0799393 | 2007-08-09 | Inactive | |
| DUET SOFTWARE INC. | — | BC0455807 | 1993-10-07 | Active | |
| DUET WEDDING | — | FM0375747 | 2004-07-02 | Active | |
| DUETTE TECHNOLOGIES INC. | — | BC1603945 | 2026-08-14 | Active | |
| DUETTO BUGGY DESIGN STUDIO CO | — | FM0596766 | 2012-12-05 | Active | |
| DUETTO MARKETING CORP. | — | BC1253225 | 2020-06-12 | Inactive | |
| DUEX MARIE DIGITAL INC. | — | BC1369818 | 2022-06-30 | Inactive | |
| DUEX MARINE LTD. | — | BC0447287 | 1993-05-18 | Inactive | |
| DUFASELF ENTERPRISES INC. | — | A0118272 | 2021-05-25 | Active | |
| DUFAULT HOLDINGS LTD. | — | BC0221259 | 1980-11-27 | Inactive | |
| DUFAUT INVESTMENTS LTD. | — | BC0160662 | 1977-04-22 | Inactive | |
| DUFBRO HOLDINGS LTD. | — | BC0260133 | 1983-02-11 | Inactive | |
| DUFETE HOLDINGS INC. | — | BC0729856 | 2005-07-13 | Inactive | |
| DUFEUX WELDING FARM EQUIPMENT LTD. | — | BC0965007 | 2013-03-14 | Inactive | |
| DUFF & NOBLE HOLDINGS LTD. | — | BC0772378 | 2006-10-20 | Inactive | |
| DUFF & PHELPS CANADA LIMITED | — | A0101711 | 2017-02-28 | Inactive | |
| DUFF AGENCIES LTD. | — | BC0170414 | 1978-01-25 | Inactive | |
| DUFF AVIATION | — | FM0874279 | 2022-03-15 | Active | |
| DUFF CONSULTING | — | FM0293149 | 2000-12-28 | Active | |
| DUFF CONSULTING AND COUNSELLING INC. | — | BC1344350 | 2022-01-24 | Active | |
| DUFF CONSULTING SERVICES | — | FM0552070 | 2011-03-15 | Active | |
| DUFF CONTRACTING LTD. | — | BC0682088 | 2003-11-26 | Inactive | |
| DUFF CONTRACTORS LTD. | — | BC0129478 | 1974-06-27 | Inactive | |
| DUFF ENTERPRISES LTD. | — | BC0583059 | 1999-04-08 | Inactive | |
| DUFF GRAY TRUCKING LTD. | — | BC0112356 | 1972-09-27 | Inactive | |
| DUFF HOLDINGS LTD. | — | BC0200502 | 1979-11-26 | Inactive | |
| DUFF HOLDINGS LTD. | — | BC0039823 | — | Inactive | |
| DUFF HOME MAINTENANCE | — | FM0653376 | 2015-02-18 | Active | |
| DUFF MARRS ARCHITECT INCORPORATED | — | BC1181622 | 2018-10-02 | Active | |
| DUFF PROPERTIES INC. | — | BC1252383 | 2020-06-05 | Active | |
| DUFF PSYCHOLOGICAL SERVICES | — | FM0731575 | 2017-10-25 | Active | |
| DUFF PSYCHOLOGICAL SERVICES INC. | — | BC1252972 | 2020-06-10 | Active | |
| DUFF PUBLISHING | — | FM0487059 | 2008-09-26 | Active | |
| DUFF WADDELL LAW CORPORATION | — | BC0969399 | 2013-05-07 | Inactive | |
| DUFF WALKER LTD. | — | BC0018652 | — | Inactive | |
| DUFF'S BACKHOE SERVICES | — | FM0852794 | 2021-07-13 | Active | |
| DUFF'S BOBCAT SERVICES | — | FM0545098 | 2010-12-14 | Active | |
| DUFF'S ENTERPRISES LTD. | — | BC0961266 | 2013-01-30 | Inactive | |
| DUFF'S LANDSCAPING SERVICES | — | FM0071902 | 1986-08-28 | Active | |
| DUFF'S MECHANICAL LTD. | — | BC0215043 | 1980-08-25 | Inactive | |
| DUFF'S WELDING LTD. | — | A0076934 | 2009-03-27 | Active | |
| DUFF-MACKAY EQUIPMENT LTD. | — | BC0045397 | — | Inactive | |
| DUFFCLARKE'S IMPORT-EXPORT | — | FM0038954 | 1981-08-25 | Active | |
| DUFFCO AUTO EXPORT INC. | — | BC0651328 | 2002-07-18 | Inactive | |
| DUFFCO ENTERPRISES INC. | — | BC0284856 | 1984-11-09 | Inactive | |
| DUFFCONSULTING-CO | — | FM0852733 | 2021-07-12 | Active | |
| DUFFER SALES | — | FM0003744 | 1967-12-18 | Inactive | |
| DUFFER'S GOLF INC. | — | BC0248399 | 1982-02-04 | Inactive | |
| DUFFERIN BUILDING CORPORATION | — | BC0674398 | 2003-07-31 | Inactive | |
| DUFFERIN CARE CENTRE HOLDINGS LTD. | — | BC0699332 | 2004-07-08 | Active | |
| DUFFERIN CARE CENTRE PARTNERSHIP | — | FM0376901 | 2004-07-20 | Inactive | |
| DUFFERIN CARE LIMITED PARTNERSHIP | — | LP0376487 | 2004-07-14 | Active | |
| DUFFERIN CLUB LIMITED | — | BC0005726 | — | Inactive | |
| DUFFERIN CONTRACTING LTD. | — | BC0828477 | 2008-06-24 | Inactive | |
| DUFFERIN ENTERPRISES LTD. | — | BC0170777 | 1978-02-03 | Active | |
| DUFFERIN EQUIPMENT RENTAL CORP. | — | A0033592 | 1991-05-15 | Inactive | |
| DUFFERIN EQUIPMENT SALES CORP. | — | A0033545 | 1991-05-08 | Inactive | |
| DUFFERIN ESTATES LTD. | — | BC0102787 | 1971-09-13 | Inactive | |
| DUFFERIN GAME ROOM STORE | — | FM0088846 | 1988-06-24 | Active | |
| DUFFERIN GAME ROOM STORE | — | FM0150148 | 1993-09-24 | Active | |
| DUFFERIN GAME ROOM STORE LTD. | — | A0043068 | — | Inactive | |
| DUFFERIN GAMES LTD. | — | A0057960 | — | Inactive | |
| DUFFERIN GAMES LTD. | — | A0058029 | 2002-11-04 | Inactive | |
| DUFFERIN GARDENS DEVELOPMENTS LTD. | — | BC0226155 | 1981-02-05 | Inactive | |
| DUFFERIN GATE PRODUCTIONS INC. | — | A0047999 | 1998-09-10 | Inactive | |
| DUFFERIN GOLDS LIMITED (NON-PERSONAL LIABILITY) | — | BC0015222 | — | Inactive | |
| DUFFERIN HEIGHTS APARTMENTS LTD. | — | BC1254662 | 2020-06-25 | Active | |
| DUFFERIN HEIGHTS DEVELOPMENTS LTD. | — | BC0070956 | 1966-08-31 | Inactive | |
| DUFFERIN HEIGHTS HOLDINGS LIMITED PARTNERSHIP | — | LP0040217 | 1981-11-27 | Active | |
| DUFFERIN HEIGHTS HOLDINGS LTD. | — | BC0234225 | 1981-05-11 | Inactive | |
| DUFFERIN HOLDINGS LTD. | — | BC0102084 | 1971-08-09 | Inactive | |
| DUFFERIN HOTEL CO. LTD. | — | BC0011287 | — | Inactive | |
| DUFFERIN INVESTMENTS LTD. | — | BC0359485 | 1989-02-08 | Inactive | |
| DUFFERIN LAND CORPORATION | — | BC0396756 | 1990-11-21 | Inactive | |
| DUFFERIN LAND CORPORATION | — | BC0723235 | 2005-05-01 | Active | |