| DIAMOND IN THE RUFF MOBILE PET SERVICES | — | FM0374351 | 2004-06-10 | Active | |
| DIAMOND IN THE RUFF PET SITTING | — | FM0509522 | 2009-08-22 | Active | |
| DIAMOND INDUSTRIAL SERVICES LTD. | — | BC0069480 | — | Inactive | |
| DIAMOND INDUSTRIAL SUPPLIES INC. | — | BC0368390 | 1989-06-27 | Inactive | |
| DIAMOND INDUSTRIAL SUPPLY | — | FM0097084 | 1989-05-03 | Active | |
| DIAMOND INDUSTRIES LTD. | — | BC0736457 | 2005-09-30 | Active | |
| DIAMOND INDUSTRIES ROOFING AND SIDING | — | FM0391948 | 2005-03-05 | Active | |
| DIAMOND INFORMATION SYSTEMS INC. | — | BC0548589 | 1997-08-15 | Inactive | |
| DIAMOND INNOVATIONS | — | FM0285955 | 2000-08-14 | Active | |
| DIAMOND INSTALLS | — | FM0747573 | 2018-05-18 | Active | |
| DIAMOND INSTITUTE OF EXCELLENCE | — | FM0048211 | 1983-06-20 | Active | |
| DIAMOND INSULATION & REBAR LTD. | — | BC0930636 | 2012-01-20 | Inactive | |
| DIAMOND INSULATION LTD. | — | BC1188781 | 2018-12-03 | Active | |
| DIAMOND INSULATION LTD. | — | BC0483237 | 1994-10-28 | Inactive | |
| DIAMOND INSURANCE GROUP INC. | — | A0137275 | 2025-06-05 | Active | |
| DIAMOND INTER VENTURES INC. | — | BC0909929 | 2011-05-06 | Inactive | |
| DIAMOND INTERIORS | — | FM0423521 | 2006-05-03 | Active | |
| DIAMOND INTERIORS LTD. | — | BC0151482 | 1976-08-04 | Inactive | |
| DIAMOND INTERIORS LTD. | — | BC0787484 | 2007-04-04 | Inactive | |
| DIAMOND INTERIORS LTD. | — | BC0407186 | 1991-06-06 | Inactive | |
| DIAMOND INTERNATIONAL EDUCATION GROUP INC. | — | BC1163770 | 2018-05-10 | Inactive | |
| DIAMOND INTERNATIONAL ENT. LTD. | — | BC0566137 | 1998-06-08 | Inactive | |
| DIAMOND INTERNATIONAL INFORMATION SERVICES (CANADA) INC. | — | A0038637 | 1994-03-09 | Inactive | |
| DIAMOND INTERNATIONAL INVESTMENT LTD. | — | BC0556818 | 1998-01-02 | Inactive | |
| DIAMOND INTERNATIONAL MARKETING GROUP LTD. | — | BC0948806 | 2012-08-27 | Inactive | |
| DIAMOND INTERNATIONAL SERVICES INC. | — | BC0574046 | 1998-10-30 | Inactive | |
| DIAMOND INTERNATIONAL SHOES & ACCESSORIES INCORPORATED | — | BC0647791 | 2002-05-17 | Inactive | |
| DIAMOND INTERNATIONAL TRAVEL LTD. | — | BC0823568 | 2008-04-29 | Active | |
| DIAMOND INTERNATIONAL TRUCKS LTD. | — | A0052232 | 2000-06-22 | Inactive | |
| DIAMOND INTERNATIONAL TRUCKS LTD. | — | A0125759 | 2022-12-22 | Active | |
| DIAMOND INTERNET SERVICES INC. | — | BC0520228 | 1996-05-17 | Inactive | |
| DIAMOND INVESTIGATIONS | — | FM0214149 | 1997-02-12 | Active | |
| DIAMOND INVESTMENT GROUP LTD. | — | BC0316864 | 1986-10-31 | Inactive | |
| DIAMOND INVESTMENT GROUP LTD. | — | A0044744 | 1997-03-24 | Active | |
| DIAMOND INVESTMENTS LTD. | — | BC0049134 | 1960-11-24 | Inactive | |
| DIAMOND IRON GROOMING | — | FM0803371 | 2020-04-09 | Active | |
| DIAMOND IRRIGATION | — | FM0747654 | 2018-05-19 | Active | |
| DIAMOND ISLAND BEEF | — | FM1048388 | 2024-06-07 | Active | |
| DIAMOND ISLAND CATTLE COMPANY | — | FM0474141 | 2008-04-01 | Active | |
| DIAMOND ISLAND FARMS CARIBOO LTD. | — | BC0064382 | — | Inactive | |
| DIAMOND ISLAND HAY AND GRAIN | — | FM0693364 | 2016-07-10 | Active | |
| DIAMOND ISLAND SAWMILLS LIMITED | — | BC0035919 | — | Inactive | |
| DIAMOND ISLAND TRUCKING | — | FM1048380 | 2024-06-07 | Active | |
| DIAMOND ISLAND TRUCKING | — | FM0602635 | 2013-03-06 | Active | |
| DIAMOND ISLE QUARTER HORSE RANCHES LTD. | — | BC0159737 | 1977-03-28 | Inactive | |
| DIAMOND J CONSULTING | — | FM0485427 | 2008-09-04 | Active | |
| DIAMOND J CONTRACTING | — | FM0888005 | 2022-08-15 | Active | |
| DIAMOND J OILFIELD HAULING (1991) LTD. | — | A0044490 | 1997-02-14 | Inactive | |
| DIAMOND J PROPERTIES LTD. | — | BC0150400 | 1976-06-29 | Inactive | |
| DIAMOND J SETTINGS | — | FM0252780 | 1999-01-29 | Active | |
| DIAMOND J, TRADING COMPANY LIMITED | — | BC0052365 | 1962-01-08 | Inactive | |
| DIAMOND J. AGCHEM | — | FM0197560 | 1996-04-18 | Active | |
| DIAMOND J. CONTRACTING LTD. | — | BC0109560 | 1972-06-06 | Inactive | |
| DIAMOND J. FARMS (1991) LTD. | — | A0034543 | 1991-11-08 | Active | |
| DIAMOND J. HOLDINGS INC. | — | A0059038 | 2003-03-27 | Active | |
| DIAMOND J. HOLDINGS LTD. | — | A0022434 | 1984-09-18 | Inactive | |
| DIAMOND J. INDUSTRIES LTD. | — | A0034362 | 1991-09-30 | Inactive | |
| DIAMOND J. LTD. | — | A0042660 | 1996-04-03 | Active | |
| DIAMOND J. TRANSPORT | — | FM0197564 | 1996-04-18 | Active | |
| DIAMOND JACK CONSTRUCTION LTD. | — | BC0710762 | 2004-12-09 | Inactive | |
| DIAMOND JACK ENTERPRISES LTD. | — | BC0435309 | 1992-11-05 | Active | |
| DIAMOND JAMES APPRAISALS | — | FM0404868 | 2005-08-19 | Active | |
| DIAMOND JANITOR CLEANER LTD. | — | BC0414995 | 1991-11-06 | Inactive | |
| DIAMOND JANITORIAL | — | FM1083039 | 2025-07-30 | Active | |
| DIAMOND JIM ENTERPRISES LTD. | — | BC0108311 | 1972-04-21 | Inactive | |
| DIAMOND JIM ENTERPRISES LTD. | — | BC0559011 | 1998-02-05 | Inactive | |
| DIAMOND JIM'S | — | FM0655413 | 2015-03-13 | Active | |
| DIAMOND JIM'S TRADING POST | — | FM0115971 | 1991-02-20 | Active | |
| DIAMOND JK CONTRACTING INC. | — | BC1020054 | 2014-11-26 | Active | |
| DIAMOND JOE'S PLUMBING | — | FM0184420 | 1995-08-04 | Active | |
| DIAMOND JUBILEE MINING AND DEVELOPMENT OF BRITISH COLUMBIA LIMITED LIABILITY | — | QD0000634 | — | Inactive | |
| DIAMOND K CONCRETE FINISHING | — | FM0882081 | 2022-06-01 | Active | |
| DIAMOND K CONSULTING LTD. | — | BC1103917 | 2017-01-16 | Active | |
| DIAMOND K CONTRACTING LIMITED | — | BC1020141 | 2014-11-26 | Inactive | |
| DIAMOND K ENTERPRISES | — | FM0289978 | 2000-10-20 | Active | |
| DIAMOND K ENTERPRISES LTD. | — | BC0658476 | 2002-11-13 | Inactive | |
| DIAMOND K HOLDINGS LTD. | — | A0013459 | — | Inactive | |
| DIAMOND K HOLDINGS LTD. | — | C0256997 | 1982-11-23 | Inactive | |
| DIAMOND K MANAGEMENT SERVICES LTD. | — | BC1496607 | 2024-08-13 | Active | |
| DIAMOND K OUTFITTERS | — | FM0266122 | 1999-09-15 | Active | |
| DIAMOND K OUTFITTERS LTD. | — | BC0224152 | 1981-01-08 | Inactive | |
| DIAMOND K RANCH | — | FM0016513 | 1974-08-08 | Active | |
| DIAMOND K RANCH | — | FM0033548 | 1980-04-14 | Active | |
| DIAMOND K RANCH | — | FM0612451 | 2013-07-18 | Active | |
| DIAMOND K RANCH LTD. | — | BC1310391 | 2021-06-15 | Active | |
| DIAMOND KEY MARKETING LTD. | — | BC0566592 | 1998-06-15 | Inactive | |
| DIAMOND KICKBOXING CLUB | — | FM0260823 | 1999-06-11 | Active | |
| DIAMOND KILN SALES CO. LTD. | — | BC0043273 | — | Inactive | |
| DIAMOND KITCHENS LTD. | — | BC0025343 | — | Inactive | |
| DIAMOND KNIFE SHARPENING | — | FM1073727 | 2025-04-23 | Active | |
| DIAMOND KUT BARBERSHOP | — | FM0744455 | 2018-04-06 | Active | |
| DIAMOND L FARM | — | FM0785403 | 2019-08-20 | Active | |
| DIAMOND L INVESTMENTS LTD. | — | BC0404710 | 1991-04-22 | Inactive | |
| DIAMOND L RANCH | — | FM0591986 | 2012-09-21 | Active | |
| DIAMOND L VENTURES LTD. | — | BC1308261 | 2021-06-01 | Active | |
| DIAMOND LABEL ENTERTAINMENT (THE) | — | FM0374204 | 2004-06-09 | Active | |
| DIAMOND LABEL SERVICES | — | FM0485343 | 2008-09-02 | Active | |
| DIAMOND LABEL SERVICES LTD. | — | BC0908045 | 2011-04-12 | Inactive | |
| DIAMOND LABOUR CONTRACTING LTD. | — | BC0633448 | 2001-09-04 | Inactive | |
| DIAMOND LADIES ASSOCIATION OF BRITISH COLUMBIA | — | S0065627 | 2016-06-13 | Active | |
| DIAMOND LADY JEWELLERY INC. | — | BC1098055 | 2016-11-28 | Active | |
| DIAMOND LAKE DEVELOPMENTS INC. | — | BC1087184 | 2016-08-24 | Inactive | |
| DIAMOND LAND CONSULTANTS INC. | — | BC0420122 | 1992-02-14 | Active | |
| DIAMOND LAND INTERNATIONAL INVESTMENT INC. | — | BC0794401 | 2007-06-15 | Inactive | |
| DIAMOND LANDSCAPING & GARDENING | — | FM0600631 | 2013-02-08 | Active | |
| DIAMOND LANDSCAPING & GARDENING LIMITED | — | BC1035629 | 2015-05-06 | Active | |
| DIAMOND LASER | — | FM0726768 | 2017-08-25 | Active | |
| DIAMOND LATH MILLS LIMITED | — | BC0005070 | — | Inactive | |
| DIAMOND LAWN CARE | — | FM0099129 | 1989-07-14 | Active | |
| DIAMOND LAZY H ENTERPRISES LTD. | — | BC0840140 | 2008-11-25 | Active | |
| DIAMOND LAZY H ENTERPRISES LTD. | — | BC0693992 | 2004-04-30 | Inactive | |
| DIAMOND LAZY T HORSEMANSHIP | — | FM1060386 | 2024-11-14 | Active | |
| DIAMOND LEAD LOGGING LTD. | — | BC0253321 | 1982-07-15 | Active | |
| DIAMOND LEAF TEA HOUSE LTD. | — | BC1129658 | 2017-08-09 | Active | |
| DIAMOND LEAGUE MINOR BASEBALL ASSOCIATION | — | S0070349 | 2018-11-23 | Inactive | |
| DIAMOND LEDGERS BOOKKEEPING SERVICES | — | FM0382095 | 2004-10-08 | Active | |
| DIAMOND LEGAL DOCUMENTATION AGENCIES | — | FM0221370 | 1997-06-10 | Active | |
| DIAMOND LIFE INDUSTRIES LTD. | — | BC1579954 | 2026-03-02 | Active | |
| DIAMOND LIFE INTERNATIONAL MARKETING INC. | — | BC0494380 | 1995-04-07 | Inactive | |
| DIAMOND LIFESTYLE DECOR | — | FM0753418 | 2018-08-02 | Active | |
| DIAMOND LIL'S CABARET | — | FM0011835 | 1973-04-09 | Active | |
| DIAMOND LIL'S TRUCKING | — | FM0126351 | 1992-01-15 | Active | |
| DIAMOND LIL'S TRUCKING LTD. | — | BC0427294 | 1992-06-15 | Inactive | |
| DIAMOND LILL IMPORTS | — | FM0791537 | 2019-11-05 | Active | |
| DIAMOND LIMESTONE LTD. | — | BC0143922 | 1975-12-24 | Inactive | |
| DIAMOND LIMOSINE SERVICE | — | FM0167924 | 1994-10-04 | Active | |
| DIAMOND LIMOUSINE LTD. | — | BC0775842 | 2006-11-29 | Inactive | |
| DIAMOND LIMOUSINE LTD. | — | BC0794276 | 2007-06-14 | Active | |
| DIAMOND LIMOUSINE SERVICE INC. | — | BC0483866 | 1994-11-08 | Inactive | |
| DIAMOND LIMOUSINE SERVICE, KAMLOOPS | — | FM0120751 | 1991-07-03 | Active | |
| DIAMOND LINE INVESTMENT LTD. | — | BC0515187 | 1996-03-06 | Inactive | |
| DIAMOND LINK ENTERPRISES (CANADA) LTD. | — | BC0417992 | 1991-12-31 | Inactive | |
| DIAMOND LINK ENTERPRISES (CANADA) LTD. | — | BC0383450 | 1990-03-07 | Inactive | |
| DIAMOND LION CONSTRUCTION SERVICES INC. | — | BC1286737 | 2021-02-01 | Active | |
| DIAMOND LIQUOR COMPANY LIMITED | — | QE0001859 | — | Inactive | |
| DIAMOND LNG CANADA LTD. | — | A0089977 | 2013-08-19 | Active | |
| DIAMOND LNG CANADA PARTNERSHIP | — | FM0740018 | 2018-02-13 | Active | |
| DIAMOND LODGE LTD. | — | BC0419120 | 1992-01-28 | Inactive | |
| DIAMOND LOGISTICS LTD. | — | BC0251980 | 1982-05-27 | Inactive | |
| DIAMOND LUMBER AND BUILDING SUPPLIES LTD. | — | BC0043812 | — | Inactive | |
| DIAMOND LUMBER PRODUCTS LTD. | — | BC1285022 | 2021-01-21 | Inactive | |
| DIAMOND LUMBER SALES LIMITED | — | BC0267210 | 1983-07-29 | Inactive | |
| DIAMOND LUMBER SALES LIMITED | — | A0056398 | 2002-03-04 | Inactive | |
| DIAMOND LUX CLEANING | — | FM1039662 | 2024-02-28 | Active | |
| DIAMOND M CATTLE COMPANY | — | FM0598484 | 2013-01-08 | Active | |
| DIAMOND M CONTRACTING | — | FM0782006 | 2019-07-08 | Active | |
| DIAMOND M CONTRACTING LTD. | — | BC1359607 | 2022-04-25 | Active | |
| DIAMOND M FALLING INC. | — | BC1588941 | 2026-05-01 | Active | |
| DIAMOND M GUEST RANCH RESORT LTD. | — | BC0040335 | — | Inactive | |
| DIAMOND M HOLDINGS LTD. | — | BC0501065 | 1995-07-20 | Inactive | |
| DIAMOND M HOLDINGS LTD. | — | BC0170318 | 1978-01-23 | Inactive | |
| DIAMOND M INDUSTRIES LTD. | — | BC0251065 | 1982-04-27 | Inactive | |
| DIAMOND M OUTFITTERS LTD. | — | BC0316935 | 1986-11-03 | Active | |
| DIAMOND M TRANSPORT LTD. | — | BC0236329 | 1981-06-04 | Inactive | |
| DIAMOND M. CONSTRUCTION INC. | — | BC0424916 | 1992-05-01 | Inactive | |
| DIAMOND M. CONSTRUCTION LTD. | — | BC0658402 | 2002-11-12 | Inactive | |
| DIAMOND MACHINING SERVICES | — | FM0247020 | 1998-09-24 | Active | |
| DIAMOND MAID SERVICES | — | FM0315167 | 2002-01-14 | Active | |
| DIAMOND MAIDS | — | FM0600827 | 2013-02-13 | Active | |
| DIAMOND MAKEUP ARTISTRY | — | FM0682456 | 2016-02-29 | Active | |
| DIAMOND MANAGEMENT CONSULTING | — | FM0284365 | 2000-07-13 | Active | |
| DIAMOND MANAGEMENT CONSULTING INC. | — | BC0644935 | 2002-04-02 | Inactive | |
| DIAMOND MANAGEMENT INC. | — | BC0094704 | 1970-07-17 | Inactive | |
| DIAMOND MANAGEMENT LTD. | — | BC0726554 | 2005-06-06 | Inactive | |
| DIAMOND MANAGEMENT SYSTEMS | — | FM0296121 | 2001-02-22 | Active | |
| DIAMOND MAPLE CONSULTING LTD. | — | BC1111115 | 2017-03-15 | Inactive | |
| DIAMOND MARBLE LTD. | — | BC0439098 | 1993-01-12 | Inactive | |
| DIAMOND MARKETING | — | FM0210251 | 1996-11-22 | Active | |
| DIAMOND MARKETING CANADA | — | FM0339999 | 2003-02-12 | Active | |
| DIAMOND MARKETING INC. | — | BC0697011 | 2004-06-08 | Inactive | |
| DIAMOND MARKETING INC. | — | BC0586785 | 1999-06-08 | Inactive | |
| DIAMOND MASONRY (1990) LTD. | — | BC0393361 | 1990-09-11 | Inactive | |
| DIAMOND MASONRY LTD. | — | BC0626019 | 2001-04-17 | Inactive | |
| DIAMOND MASONRY LTD. | — | BC0342522 | 1988-03-22 | Inactive | |
| DIAMOND MECHANICAL LTD. | — | BC0450438 | 1993-07-07 | Inactive | |
| DIAMOND MGD | — | FM0666446 | 2015-07-28 | Inactive | |
| DIAMOND MGD | — | FM0856225 | 2021-08-24 | Inactive | |
| DIAMOND MGD LIMITED LIABILITY PARTNERSHIP | — | LL0001829 | 2020-08-12 | Inactive | |
| DIAMOND MICROLIGHTS | — | FM0507342 | 2009-07-17 | Active | |
| DIAMOND MILLWORK | — | FM0081596 | 1987-09-30 | Inactive | |
| DIAMOND MIND CONSULTING | — | FM0849057 | 2021-06-15 | Active | |
| DIAMOND MINDS COLLECTIVE GROUP INC. | — | BC1557620 | 2025-09-18 | Active | |
| DIAMOND MMA AND FITNESS ACADEMY | — | FM0588094 | 2012-07-19 | Active | |
| DIAMOND MOBILE PET CARE | — | FM0685510 | 2016-04-06 | Active | |
| DIAMOND MOBILE PET CARE | — | FM1039261 | 2024-02-24 | Active | |
| DIAMOND MONTESSORI EDUCATIONAL MATERIALS | — | FM0628539 | 2014-03-06 | Active | |
| DIAMOND MONTESSORI LTD. | — | BC1085184 | 2016-08-05 | Inactive | |
| DIAMOND MOTIVATION COMPANY | — | FM0603710 | 2013-03-19 | Active | |
| DIAMOND MOTOR INNS LTD. | — | BC0200474 | 1979-11-23 | Inactive | |
| DIAMOND MOTORS LTD. | — | BC0075064 | — | Inactive | |
| DIAMOND MOTORSPORTS LTD. | — | BC1048499 | 2015-09-09 | Active | |
| DIAMOND MOUNTAIN CONSTRUCTION LTD. | — | BC1156955 | 2018-03-16 | Inactive | |
| DIAMOND MOUNTAIN ENTERPRISES | — | FM0033100 | 1980-02-26 | Active | |
| DIAMOND MOUNTAIN HOLDINGS LTD. | — | BC1043677 | 2015-07-23 | Active | |
| DIAMOND MOUNTAIN MINES LTD. | — | BC0060826 | — | Inactive | |
| DIAMOND MOVING | — | FM0362716 | 2004-01-09 | Inactive | |
| DIAMOND MOVING SERVICES | — | FM0209254 | 1996-11-04 | Active | |
| DIAMOND MULTIMEDIA PUBLISHING & DESIGN INC. | — | BC0622382 | 2001-02-15 | Inactive | |
| DIAMOND MUSIC INTERNATIONAL | — | FM0170785 | 1994-11-23 | Active | |
| DIAMOND MUSIC STUDIO | — | FM0636291 | 2014-06-11 | Active | |