| DONAVON ASH PERSONAL REAL ESTATE CORPORATION | — | BC1386145 | 2022-11-09 | Active | |
| DONAVON CREATIONS | — | FM0185214 | 1995-08-17 | Active | |
| DONAY HOLDINGS LTD. | — | BC0282018 | 1984-08-28 | Inactive | |
| DONAYAM ENTERPRISES INC. | — | BC0444278 | 1993-04-06 | Inactive | |
| DONBAR ENTERPRISES LTD. | — | BC0153530 | 1976-10-06 | Inactive | |
| DONBAR MEDICAL INC. | — | BC0398842 | 1990-12-27 | Active | |
| DONBARDEN INSTALLATIONS SUPERVISION LTD. | — | BC0073755 | — | Inactive | |
| DONBASS CONTRACTING LIMITED | — | BC0869969 | 2009-12-28 | Inactive | |
| DONBE ENTERPRISES LTD. | — | BC0298467 | 1985-10-01 | Active | |
| DONBEC HOME REPAIR | — | FM0491199 | 2008-12-01 | Active | |
| DONBENPIUS HEALTHCARE ASSOCIATION | — | S0064342 | 2015-07-21 | Inactive | |
| DONBER HOLDINGS LTD. | — | BC0388024 | 1990-05-24 | Active | |
| DONBER MINING LTD. (N.P.L.) | — | BC0157147 | 1977-01-26 | Inactive | |
| DONBERT HOLDINGS LTD. | — | BC0211586 | 1980-06-18 | Inactive | |
| DONBET HOLDINGS LTD. | — | BC0228642 | 1981-03-06 | Inactive | |
| DONBOURNE BUILDERS | — | FM0139856 | 1993-02-17 | Active | |
| DONBOW HOLDINGS LTD. | — | BC0241374 | 1981-08-26 | Inactive | |
| DONBRIDGE HOLDINGS INC. | — | BC0743477 | 2005-12-16 | Inactive | |
| DONBULI RESTAURANT LTD. | — | BC0179187 | 1978-08-18 | Inactive | |
| DONBURGH INVESTMENTS LTD. | — | BC0282564 | 1984-09-13 | Inactive | |
| DONBURI HOLDINGS | — | FM0264665 | 1999-08-19 | Inactive | |
| DONBURTT CONSULTING & DEVELOPMENT LTD. | — | BC0227290 | 1981-02-19 | Inactive | |
| DONCAM HOLDINGS LTD. | — | BC0194673 | 1979-07-30 | Inactive | |
| DONCAN DOIT INC. | — | BC0595853 | 1999-11-17 | Active | |
| DONCAR HOLDINGS INC. | — | BC0798132 | 2007-07-26 | Inactive | |
| DONCAR INVESTMENTS LTD. | — | BC0230844 | 1981-03-30 | Inactive | |
| DONCAR LOGISTICS | — | FM0415219 | 2006-01-22 | Active | |
| DONCARO HOLDINGS LTD. | — | BC0131438 | 1974-09-18 | Inactive | |
| DONCARTEL APPAREL LTD. | — | BC0869867 | 2010-01-01 | Inactive | |
| DONCASTER AFTER SCHOOL CARE | — | FM0326394 | 2002-07-05 | Active | |
| DONCASTER AGENCIES INCORPORATED | — | BC0483732 | 1994-11-07 | Active | |
| DONCASTER APTS. LTD. | — | BC0217979 | 1980-10-10 | Active | |
| DONCASTER CLIENT SUPPORT GROUP SOCIETY | — | S0043558 | 2001-08-14 | Inactive | |
| DONCASTER CONSTRUCTION COMPANY LIMITED | — | BC0014740 | — | Inactive | |
| DONCASTER DEVELOPMENTS LIMITED | — | A0035654 | 1992-06-22 | Inactive | |
| DONCASTER DEVELOPMENTS LTD. | — | BC0166568 | 1977-10-05 | Inactive | |
| DONCASTER ENTERPRISES LTD. | — | BC0171056 | 1978-02-10 | Inactive | |
| DONCASTER ENTERPRISES LTD. | — | BC0564394 | 1998-05-07 | Active | |
| DONCASTER GALLERIES LIMITED | — | BC0199267 | 1979-10-30 | Inactive | |
| DONCASTER HOLDINGS LTD. | — | BC0070672 | 1966-08-09 | Inactive | |
| DONCASTER HOLDINGS LTD. | — | BC0330303 | 1987-07-16 | Active | |
| DONCASTER INVESTMENTS LTD. | — | BC0899102 | 2010-12-29 | Active | |
| DONCASTER INVESTMENTS LTD. | — | C0166082 | 1977-09-23 | Inactive | |
| DONCASTER OILFIELD HAULING LTD. | — | A0013718 | — | Inactive | |
| DONCASTER PACIFIC MORTGAGE LTD. | — | BC0235559 | 1981-05-27 | Inactive | |
| DONCASTER PROPERTIES LTD. | — | BC0797991 | 2007-07-25 | Inactive | |
| DONCASTER SCHOOL AUXILIARY SOCIETY | — | S0024876 | 1989-04-27 | Inactive | |
| DONCASTER-OAKCREST CHILD CARE SOCIETY | — | S0030903 | 1993-08-10 | Active | |
| DONCATH INVESTMENTS LTD. | — | BC0104769 | — | Inactive | |
| DONCBK HOLDINGS (2021) LTD. | — | BC1320914 | 2021-08-23 | Inactive | |
| DONCELA CONSTRUCTION | — | FM1021925 | 2023-07-21 | Active | |
| DONCHAR ENTERPRISES INC. | — | BC0405803 | 1991-05-09 | Inactive | |
| DONCHAS MANAGEMENT LTD. | — | BC0126496 | 1974-03-27 | Inactive | |
| DONCHEECHY APPAREL | — | FM0880224 | 2022-05-13 | Active | |
| DONCILA FLOORING | — | FM0648626 | 2014-12-11 | Active | |
| DONCLIFF BUILDERS LTD. | — | BC0208877 | 1980-04-28 | Inactive | |
| DONCLIFF DEVELOPMENTS LTD. | — | BC0166726 | 1977-10-11 | Inactive | |
| DONCO #2 HOLDINGS LTD. | — | BC0574957 | 1998-11-16 | Inactive | |
| DONCO BUILDERS LTD. | — | BC0236939 | 1981-06-12 | Inactive | |
| DONCO CONSULTING LTD. | — | BC0295080 | 1985-07-09 | Inactive | |
| DONCO DEVELOPMENTS INC. | — | BC0208283 | 1980-04-17 | Inactive | |
| DONCO ENTERPRISES INCORPORATED | — | BC0452701 | 1993-08-12 | Inactive | |
| DONCO HOLDINGS INC. | — | BC0459273 | 1993-12-01 | Inactive | |
| DONCO HOLDINGS LTD., | — | BC0090684 | — | Inactive | |
| DONCO INDUSTRIES INCORPORATED | — | A0080549 | 2010-07-02 | Inactive | |
| DONCO JANITORIAL SERVICES | — | FM0167822 | 1994-10-03 | Active | |
| DONCO JANITORIAL SERVICES | — | FM0155408 | 1994-02-07 | Inactive | |
| DONCO MANAGEMENT LTD. | — | BC0222274 | 1980-12-11 | Inactive | |
| DONCO NOVELTIES | — | FM0656691 | 2015-03-27 | Active | |
| DONCO SERVICES | — | FM0303165 | 2001-06-05 | Active | |
| DONCO VENTURES INC. | — | BC0428250 | 1992-06-30 | Inactive | |
| DONCO VENTURES INC. | — | BC0255587 | 1982-10-12 | Inactive | |
| DONCO WORLDWIDE DESIGN | — | FM0230964 | 1997-12-05 | Active | |
| DONCOL NATURE PRODUCTS | — | FM0597691 | 2012-12-20 | Active | |
| DONCOL NATURE PRODUCTS INC. | — | BC0899748 | 2011-01-06 | Inactive | |
| DONCOR CONSTRUCTION LTD. | — | BC0208142 | 1980-04-15 | Inactive | |
| DONCOR LANDSCAPING | — | FM1048408 | 2024-06-07 | Active | |
| DONCOR SCIENCE CORPORATION | — | BC0474698 | 1994-06-13 | Inactive | |
| DONCOTT HOLDINGS LTD. | — | BC0685729 | 2004-01-21 | Inactive | |
| DONCRAFT CONSTRUCTION | — | FM0016276 | 1974-07-03 | Active | |
| DONCRAFT CONSTRUCTION COMPANY LTD. | — | BC0136507 | 1975-04-14 | Inactive | |
| DONCREST CONSULTING LTD. | — | BC0372639 | 1989-09-15 | Inactive | |
| DONDALE CONTRACTING | — | FM0085255 | 1988-02-19 | Active | |
| DONDALE HOLDINGS LTD. | — | A0009835 | — | Inactive | |
| DONDE DEVELOPMENTS LTD. | — | BC0132822 | 1974-11-19 | Inactive | |
| DONDE SOLUTIONS ULC | — | BC0992433 | 2014-01-30 | Inactive | |
| DONDEE INDUSTRIES LTD. | — | BC0315777 | 1986-10-09 | Inactive | |
| DONDEE TOWING CO. LTD. | — | BC0059733 | — | Inactive | |
| DONDERE ENTERPRISES INC. | — | BC0617654 | 2000-11-17 | Inactive | |
| DONDERLAB | — | FM0851151 | 2021-06-28 | Active | |
| DONDERLAB PRODUCTIONS INC. | — | BC1357590 | 2022-04-09 | Active | |
| DONDERS DESIGN '80 | — | FM0033791 | 1980-05-07 | Active | |
| DONDO DESIGN | — | FM0496099 | 2009-02-18 | Active | |
| DONDO FASHION AND DESIGN | — | FM0585664 | 2012-06-13 | Active | |
| DONDO HOLDINGS LTD. | — | BC0119750 | 1973-06-29 | Inactive | |
| DONDON BOWL INC. | — | BC1048409 | 2015-09-09 | Active | |
| DONDON CARS LTD. | — | BC0327395 | 1987-05-29 | Inactive | |
| DONDON JANITORIAL SERVICES | — | FM0682774 | 2016-03-03 | Active | |
| DONDON JEWELRY LTD. | — | BC1318226 | 2021-08-03 | Active | |
| DONDOS ENTERPRISES LTD. | — | A0092004 | 2014-04-14 | Inactive | |
| DONDRE CONSULTING | — | FM0183588 | 1995-07-25 | Inactive | |
| DONE & DONE SORTING SERVICE | — | FM0654001 | 2015-02-25 | Active | |
| DONE & DUSTED CLEANING SERVICES | — | FM0474485 | 2008-04-04 | Active | |
| DONE 'N DUSTED CLEANING AND JANITORIAL SERVICES LTD. | — | BC0991667 | 2014-01-22 | Inactive | |
| DONE 2 PERFECTION HANDYMAN SERVICES | — | FM0446034 | 2007-03-14 | Active | |
| DONE 4 U RIGHT | — | FM0673905 | 2015-11-05 | Active | |
| DONE ALL RENOVATIONS | — | FM0524888 | 2010-03-19 | Active | |
| DONE AND DUSTED! CLEANING SERVICES | — | FM0573364 | 2012-01-06 | Active | |
| DONE BRIGHT CONTRACTING | — | FM0375008 | 2004-06-21 | Active | |
| DONE BY DAMON CONTRACTING LIMITED | — | BC0975983 | 2013-07-23 | Active | |
| DONE BY DAWN CLEANING | — | FM0403592 | 2005-08-02 | Active | |
| DONE BY NOON HOT RODS INC. | — | BC1203089 | 2019-03-29 | Active | |
| DONE BY NOON UPHOLSTERY | — | FM0731532 | 2017-10-25 | Active | |
| DONE CREATIVE SERVICES | — | FM0549497 | 2011-02-11 | Active | |
| DONE CREATIVE SOLUTIONS | — | FM0578658 | 2012-03-14 | Active | |
| DONE DEAL CONSTRUCTION | — | FM1067380 | 2025-02-08 | Active | |
| DONE DEAL LEADS LTD. | — | BC1196952 | 2019-02-07 | Inactive | |
| DONE DEAL PRESSURE WASHING | — | FM0419913 | 2006-03-21 | Active | |
| DONE DEAL RECORD LIMITED | — | BC1552827 | 2025-08-15 | Active | |
| DONE DEEDS ERRAND SERVICES | — | FM0517310 | 2009-12-08 | Active | |
| DONE DEEDS ERRAND SERVICES INC. | — | BC0879394 | 2010-04-25 | Inactive | |
| DONE EXACKLY RIGHT CONSTRUCTION INC. | — | BC1534587 | 2025-04-07 | Active | |
| DONE FARMING VENTURES LTD. | — | BC0708174 | 2004-11-08 | Inactive | |
| DONE FOUR PRODUCTIONS LLP | — | LL0000621 | 2013-02-07 | Inactive | |
| DONE GOOD CONTRACTING CO. | — | FM0531214 | 2010-06-08 | Active | |
| DONE HIGH INVESTMENT INC. | — | BC1118475 | 2017-05-11 | Inactive | |
| DONE INN LTD. | — | BC0547057 | 1997-07-18 | Inactive | |
| DONE LIKE DINNER | — | FM0790640 | 2019-10-24 | Active | |
| DONE LIKE DINNER MEAL PREPARATION | — | FM0421860 | 2006-04-11 | Active | |
| DONE N' DONE FITNESS SOLUTIONS | — | FM0761156 | 2018-11-16 | Active | |
| DONE ON TIME BOOKKEEPING | — | FM0522715 | 2010-02-20 | Active | |
| DONE ONCE DONE RIGHT CONTRACTING LTD. | — | BC0806480 | 2007-10-24 | Inactive | |
| DONE RIGHT - CHEF APPAREL | — | FM0651887 | 2015-01-29 | Active | |
| DONE RIGHT APPLIANCE INSTALLATIONS | — | FM0336271 | 2002-12-05 | Inactive | |
| DONE RIGHT APPLIANCE INSTALLATIONS | — | FM0375855 | 2004-07-05 | Active | |
| DONE RIGHT APPLIANCE INSTALLATIONS LTD. | — | BC0911207 | 2011-05-21 | Active | |
| DONE RIGHT APPS | — | FM0553638 | 2011-04-01 | Active | |
| DONE RIGHT BOOKKEEPING | — | FM0517370 | 2009-12-09 | Active | |
| DONE RIGHT BOOKKEEPING | — | FM0700898 | 2016-10-17 | Active | |
| DONE RIGHT BOOKKEEPING | — | FM0424598 | 2006-05-16 | Active | |
| DONE RIGHT BOOKKEEPING & BUSINESS SERVICES LTD. | — | BC1167665 | 2018-06-10 | Active | |
| DONE RIGHT BOOKKEEPING SERVICE | — | FM0389606 | 2005-02-04 | Active | |
| DONE RIGHT BOOKKEEPING SERVICES | — | FM0564480 | 2011-08-26 | Active | |
| DONE RIGHT BOOKS | — | FM0518394 | 2009-12-29 | Active | |
| DONE RIGHT BUILDING SYSTEMS INC. | — | BC0572377 | 1998-09-28 | Inactive | |
| DONE RIGHT CABINETS LTD. | — | BC0732399 | 2005-08-13 | Inactive | |
| DONE RIGHT CEILINGS & WALL SYSTEMS LTD. | — | BC0750172 | 2006-02-28 | Inactive | |
| DONE RIGHT CHIMNEY SERVICE | — | FM0472099 | 2008-03-04 | Active | |
| DONE RIGHT COMPUTER SERVICES | — | FM0597657 | 2012-12-20 | Active | |
| DONE RIGHT CONSTRUCTION | — | FM0356751 | 2003-10-03 | Active | |
| DONE RIGHT CONSULTING AND ADVOCATING | — | FM1036544 | 2024-01-25 | Active | |
| DONE RIGHT DEMO LIMITED | — | BC0886774 | 2010-07-27 | Inactive | |
| DONE RIGHT DEMOLITION AND DISPOSAL | — | FM0689537 | 2016-05-19 | Active | |
| DONE RIGHT DETAILING | — | FM0753395 | 2018-08-01 | Active | |
| DONE RIGHT DOORS | — | FM0820399 | 2020-10-19 | Active | |
| DONE RIGHT DRAINAGE | — | FM0627818 | 2014-02-26 | Active | |
| DONE RIGHT DRIVING SCHOOL | — | FM0325254 | 2002-06-14 | Active | |
| DONE RIGHT DRIVING SCHOOL LTD. | — | BC0968153 | 2013-04-22 | Active | |
| DONE RIGHT DRONES | — | FM0780993 | 2019-06-25 | Active | |
| DONE RIGHT DRYWALL SERVICES | — | FM0345218 | 2003-04-16 | Active | |
| DONE RIGHT DRYWALL SERVICES | — | FM0414524 | 2006-01-13 | Active | |
| DONE RIGHT DRYWALL SERVICES | — | FM0403097 | 2005-07-25 | Active | |
| DONE RIGHT ELECTRIC LTD. | — | BC0937786 | 2012-04-12 | Inactive | |
| DONE RIGHT ELECTRIC LTD. | — | BC0233888 | 1981-05-06 | Inactive | |
| DONE RIGHT ELECTRICAL | — | FM0755163 | 2018-08-21 | Active | |
| DONE RIGHT ENTERPRISES | — | FM0161118 | 1994-05-24 | Active | |
| DONE RIGHT ENTERPRISES | — | FM0213793 | 1997-02-03 | Active | |
| DONE RIGHT ENTERPRISES | — | FM0266544 | 1999-09-21 | Active | |
| DONE RIGHT ENVIRO LTD. | — | BC1177673 | 2018-08-29 | Inactive | |
| DONE RIGHT EPOXY INC. | — | BC1331514 | 2021-11-02 | Inactive | |
| DONE RIGHT FLOORING | — | FM0742849 | 2018-03-15 | Active | |
| DONE RIGHT FLOORS | — | FM0798438 | 2020-02-07 | Active | |
| DONE RIGHT FLOORS LTD. | — | BC0839692 | 2008-11-19 | Inactive | |
| DONE RIGHT GARAGE DOORS | — | FM0849760 | 2021-06-19 | Active | |
| DONE RIGHT HANDYMAN SERVICES | — | FM0429404 | 2006-07-19 | Active | |
| DONE RIGHT HOME CLEANING SERVICES | — | FM0141988 | 1993-04-08 | Active | |
| DONE RIGHT INDUSTRIAL IRONWORK & RIGGING INC. | — | BC1250367 | 2020-05-15 | Inactive | |
| DONE RIGHT KITCHEN AND BATH INC. | — | BC0727265 | 2005-06-14 | Active | |
| DONE RIGHT LANDSCAPING | — | FM1068547 | 2025-02-22 | Active | |
| DONE RIGHT MAINTENANCE SERVICES | — | FM0348344 | 2003-05-28 | Active | |
| DONE RIGHT MASONRY | — | FM0688887 | 2016-05-11 | Active | |
| DONE RIGHT MOBILE DETAILING LTD. | — | BC1534570 | 2025-04-07 | Active | |
| DONE RIGHT MOVING | — | FM0585018 | 2012-06-05 | Active | |
| DONE RIGHT PAINTING | — | FM0412884 | 2005-12-15 | Active | |
| DONE RIGHT PAINTING & RESTORATIONS LTD. | — | BC1507899 | 2024-10-22 | Active | |
| DONE RIGHT PAINTING & SANDBLASTING LTD. | — | BC0796201 | 2007-07-05 | Active | |
| DONE RIGHT PEST CONTROL LTD. | — | BC0758933 | 2006-05-29 | Inactive | |
| DONE RIGHT PG AUTO LTD. | — | BC0882843 | 2010-06-04 | Active | |
| DONE RIGHT PROPERTY MANAGEMENT | — | FM0873163 | 2022-03-06 | Active | |
| DONE RIGHT ROOFING | — | FM0505819 | 2009-06-24 | Active | |
| DONE RIGHT ROOFING | — | FM0364912 | 2004-02-06 | Active | |
| DONE RIGHT ROOFING | — | FM0509311 | 2009-08-19 | Active | |
| DONE RIGHT ROOFING AND GUTTERS INC. | — | A0141457 | 2026-04-09 | Active | |
| DONE RIGHT ROOFING LTD. | — | BC1057723 | 2015-12-08 | Inactive | |
| DONE RIGHT SIGN SERVICES | — | FM0521371 | 2010-02-04 | Active | |
| DONE RIGHT SOLUTIONS | — | FM0334019 | 2002-11-06 | Active | |
| DONE RIGHT SOLUTIONS LTD. | — | BC0666988 | 2003-04-01 | Inactive | |
| DONE RIGHT SPECIAL EFFECTS INC. | — | BC1176506 | 2018-08-20 | Active | |
| DONE RIGHT TREE SERVICE | — | FM0687469 | 2016-04-26 | Active | |
| DONE RIGHT VACUUM INSTALLATIONS | — | FM0207220 | 1996-10-01 | Active | |