| ATLAS HEALTH THERAPY | — | FM0571075 | 2011-11-29 | Active | — |
| ATLAS HEATING LTD. | — | BC0034048 | — | Inactive | — |
| ATLAS HEAVY DUTY REPAIRS LTD. | — | BC1288420 | 2021-02-10 | Active | — |
| ATLAS HEAVY EQUIPMENT REPAIR | — | FM0809540 | 2020-06-30 | Active | — |
| ATLAS HEAVY EQUIPMENT REPAIR | — | FM0810306 | 2020-07-09 | Active | — |
| ATLAS HELIX-PRO SERVICES | — | FM0641381 | 2014-08-26 | Active | — |
| ATLAS HOLDINGS LTD. | — | BC0029533 | — | Inactive | — |
| ATLAS HOLDINGS LTD. | — | BC0208329 | 1980-04-18 | Active | — |
| ATLAS HOME IMPROVEMENTS | — | FM0000004 | 1966-09-06 | Active | — |
| ATLAS HOME INVESTOR LTD. | — | BC1072253 | 2016-04-15 | Active | — |
| ATLAS HOME SERVICES | — | FM0495565 | 2009-02-11 | Active | — |
| ATLAS HORIZON CONTRACTORS LTD. | — | BC0822718 | 2008-04-23 | Inactive | — |
| ATLAS HORTICULTURE SERVICES INC. | — | BC1012365 | 2014-08-30 | Active | — |
| ATLAS HOSPITALITY INC. | — | BC0417944 | 1991-12-31 | Active | — |
| ATLAS HOTELS LTD. | — | BC0035888 | 1956-03-13 | Inactive | — |
| ATLAS IDEAL METALS INC. | — | A0055131 | — | Inactive | — |
| ATLAS IDEAL METALS INC. | — | A0050025 | — | Inactive | — |
| ATLAS IMMIGRATION AND BUSINESS CONSULTING GROUP INC. | — | BC0575184 | 1998-11-19 | Inactive | — |
| ATLAS IMMIGRATION LTD. | — | BC1182556 | 2018-10-11 | Inactive | — |
| ATLAS IMMIGRATION LTD. | — | BC1599045 | 2026-07-09 | Active | — |
| ATLAS IMPORT | — | FM0446695 | 2007-03-22 | Inactive | — |
| ATLAS IMPORT & EXPORT LTD. | — | BC0622242 | 2001-02-13 | Inactive | — |
| ATLAS IMPORTERS | — | FM0040947 | 1982-01-19 | Active | — |
| ATLAS IMPORTERS LTD. | — | BC0254765 | 1982-09-13 | Inactive | — |
| ATLAS IMPORTING COMPANY LIMITED | — | BC0015240 | — | Inactive | — |
| ATLAS IMPORTS LTD. | — | BC0327682 | 1987-06-04 | Inactive | — |
| ATLAS IMPORTS LTD. | — | BC0808985 | 2007-11-21 | Active | — |
| ATLAS INDUSTRIAL COATINGS, INC. | — | A0036960 | 1993-04-19 | Inactive | — |
| ATLAS INDUSTRIAL SUPPLY | — | FM0282018 | 2000-06-05 | Active | — |
| ATLAS INDUSTRIAL WHOLESALE LTD. | — | BC0069656 | 1966-05-24 | Inactive | — |
| ATLAS INDUSTRIES INC. | — | BC0664406 | 2003-02-21 | Inactive | — |
| ATLAS INDUSTRIES LTD. | — | BC0097914 | 1971-01-22 | Inactive | — |
| ATLAS INDUSTRIES LTD. | — | BC0037053 | — | Inactive | — |
| ATLAS INFOGRAPHICS | — | FM0106378 | 1990-04-03 | Inactive | — |
| ATLAS INFORMATION MANAGEMENT | — | FM0182481 | 1995-07-10 | Inactive | — |
| ATLAS INFORMATION TECHNOLOGIES INC. | — | BC0535193 | 1997-01-22 | Active | — |
| ATLAS INNOVATION INC. | — | A0128777 | 2023-08-09 | Inactive | — |
| ATLAS INNOVATIONS CORP. | — | BC1155123 | 2018-03-03 | Inactive | — |
| ATLAS INSPECTION CORPORATION | — | BC1017838 | 2014-10-31 | Inactive | — |
| ATLAS INSTALLATIONS LTD. | — | BC0089383 | — | Inactive | — |
| ATLAS INSTITUTE OF ACUPUNCTURE AND MASSAGE THERAPY | — | FM0299205 | 2001-04-06 | Active | — |
| ATLAS INSURANCE ADJUSTERS LTD. | — | BC0179268 | 1978-08-21 | Inactive | — |
| ATLAS INTELLECTUAL PROPERTY MANAGEMENT CO. | — | A0088894 | 2013-04-14 | Inactive | — |
| ATLAS INTERNATIONAL ENTERPRISES INC. | — | BC0528181 | 1996-09-30 | Inactive | — |
| ATLAS INTERNATIONAL MARINE SERVICES INC. | — | BC0431110 | 1992-08-24 | Inactive | — |
| ATLAS INTERNATIONAL MARKETING INC. | — | A0057023 | 2002-05-31 | Inactive | — |
| ATLAS INTERNATIONAL MARKETING INC. | — | C1262836 | 2020-08-25 | Inactive | — |
| ATLAS INTERNATIONAL PROJECTS INC. | — | BC0291076 | 1985-04-15 | Inactive | — |
| ATLAS INTERNATIONAL TRADING | — | FM0145728 | 1993-06-18 | Active | — |
| ATLAS INVESTMENTS LIMITED | — | BC0035895 | — | Inactive | — |
| ATLAS INVESTMENTS LTD. | — | BC0174696 | 1978-05-03 | Inactive | — |
| ATLAS INVESTOR RELATIONS LTD. | — | BC1318252 | 2021-08-04 | Active | — |
| ATLAS IRON AND METALS LIMITED | — | BC0049459 | 1960-12-30 | Inactive | — |
| ATLAS IRRIGATION | — | FM0768252 | 2019-02-12 | Active | — |
| ATLAS IRRIGATION LTD. | — | BC1274648 | 2020-11-14 | Active | — |
| ATLAS IT SOLUTIONS LTD. | — | BC1002034 | 2014-05-13 | Active | — |
| ATLAS JANITORIAL | — | FM0533378 | 2010-07-07 | Active | — |
| ATLAS JANITORIAL SERVICE INC. | — | BC0894821 | 2010-11-06 | Inactive | — |
| ATLAS JANITORIAL SERVICES LTD. | — | BC1220876 | 2019-08-26 | Active | — |
| ATLAS JUNK REMOVAL | — | FM0570152 | 2011-11-15 | Active | — |
| ATLAS JUNK REMOVAL, INC. | — | BC1055163 | 2015-11-12 | Active | — |
| ATLAS LABOUR COMPANY | — | FM0780179 | 2019-06-17 | Active | — |
| ATLAS LABOUR FORCE CORP. | — | BC0937193 | 2012-04-04 | Inactive | — |
| ATLAS LAND RESEARCH LTD. | — | BC0087178 | 1969-06-04 | Inactive | — |
| ATLAS LANDSCAPING & RENOVATION LTD. | — | BC0799420 | 2007-08-10 | Inactive | — |
| ATLAS LANDSCAPING & SNOW REMOVAL INC. | — | BC1591823 | 2026-05-22 | Active | — |
| ATLAS LANDSCAPING AND IRRIGATION | — | FM0627807 | 2014-02-26 | Active | — |
| ATLAS LANDSCAPING LTD. | — | BC0215069 | 1980-08-25 | Inactive | — |
| ATLAS LASERWORKS AND INDUSTRIAL SUPPLIES CORPORATION | — | BC1530328 | 2025-03-07 | Active | — |
| ATLAS LAW | — | FM0883719 | 2022-06-16 | Active | — |
| ATLAS LAW CORPORATION | — | BC1541976 | 2025-05-30 | Active | — |
| ATLAS LEASING LTD. | — | BC0100482 | 1971-05-25 | Inactive | — |
| ATLAS LEASING LTD. | — | BC1142733 | 2017-11-30 | Active | — |
| ATLAS LEGACY SOCIETY | — | S0078458 | 2023-06-30 | Active | — |
| ATLAS LIFT RENTALS INC. | — | BC1055758 | 2015-11-18 | Active | — |
| ATLAS LIFT TRUCK RENTALS LTD. | — | BC0550563 | 1997-09-19 | Inactive | — |
| ATLAS LINE IMPROVEMENTS INC. | — | BC1579221 | 2026-02-25 | Active | — |
| ATLAS LIVING LTD. | — | BC1501650 | 2024-09-13 | Active | — |
| ATLAS LUMBER & SHINGLE CO. LTD. | — | BC0016853 | 1939-08-25 | Inactive | — |
| ATLAS LUMBER COMPANY LIMITED | — | BC0009068 | — | Inactive | — |
| ATLAS MACHINERY CO. LTD. | — | BC0095375 | 1970-08-28 | Inactive | — |
| ATLAS MACHINERY SUPPLY INC. | — | BC1595048 | 2026-06-12 | Active | — |
| ATLAS MACHINES | — | FM0086093 | 1988-03-17 | Inactive | — |
| ATLAS MACHINES LTD. | — | BC0348603 | 1988-07-14 | Active | — |
| ATLAS MANAGEMENT CONSULTANTS LTD. | — | BC0084652 | — | Inactive | — |
| ATLAS MANAGEMENT LTD. | — | BC0187713 | 1979-03-08 | Active | — |
| ATLAS MANUFACTURING COMPANY | — | FM0108172 | 1990-05-31 | Active | — |
| ATLAS MANUFACTURING LTD. | — | BC1436765 | 2023-09-01 | Active | — |
| ATLAS MANUFACTURING LTD. | — | BC0354732 | 1988-11-15 | Inactive | — |
| ATLAS MANUFACTURING LTD. | — | BC1263124 | 2020-09-01 | Inactive | — |
| ATLAS MANUFACTURING LTD. | — | BC0077888 | 1968-01-31 | Inactive | — |
| ATLAS MAPLELAND DIGITAL TECHNOLOGY CA LTD. | — | A0123671 | 2022-06-27 | Inactive | — |
| ATLAS MARINE ELECTRONICS LTD. | — | BC0210517 | 1980-05-29 | Inactive | — |
| ATLAS MARINE SURVEYORS & CONSULTANTS INC. | — | BC0811128 | 2007-12-13 | Active | — |
| ATLAS MARINE SURVEYORS AND CONSULTANTS INC. | — | BC0779007 | 2007-01-04 | Inactive | — |
| ATLAS MARINE TOPS & COVERS | — | FM0270160 | 1999-11-18 | Inactive | — |
| ATLAS MARINE TOPS & COVERS | — | FM0271779 | 1999-12-13 | Active | — |
| ATLAS MARINE TOPS & COVERS LTD. | — | BC0617229 | 2000-11-09 | Inactive | — |
| ATLAS MARKETING SERVICES | — | FM0089263 | 1988-07-12 | Active | — |
| ATLAS MARKETING SERVICES | — | FM0202020 | 1996-06-24 | Active | — |
| ATLAS MARKETING SOLUTIONS INC. | — | BC1328937 | 2021-10-18 | Active | — |
| ATLAS MASONRY LTD. | — | BC0054980 | — | Inactive | — |
| ATLAS MASSAGE | — | FM0827994 | 2020-12-23 | Active | — |
| ATLAS MATTRESS CO. LTD. | — | BC0037972 | — | Inactive | — |
| ATLAS MD | — | FM1011413 | 2023-03-10 | Active | — |
| ATLAS MECHANICAL INC. | — | BC1582531 | 2026-03-18 | Active | — |
| ATLAS MECHANICAL LTD. | — | BC0261193 | 1983-03-09 | Inactive | — |
| ATLAS MECHANICAL SERVICE | — | FM0196549 | 1996-03-29 | Active | — |
| ATLAS MEDIA INC. | — | BC1248574 | 2020-04-28 | Active | — |
| ATLAS MEDICAL INC. | — | BC1592489 | 2026-05-27 | Active | — |
| ATLAS MEGA DREAM BUILDERS CORP. | — | BC0789066 | 2007-04-24 | Inactive | — |
| ATLAS MERIDIAN GLASSWORKS INC. | — | BC0532628 | 1996-12-09 | Active | — |
| ATLAS METAVERSE REAL ESTATE DEVELOPMENT CORP. | — | BC1348519 | 2022-02-17 | Inactive | — |
| ATLAS MICRONET INC. | — | A0070841 | 2007-04-12 | Inactive | — |
| ATLAS MINERAL PROCESSING TECHNOLOGIES LTD. | — | BC0987516 | 2013-12-05 | Inactive | — |
| ATLAS MINING AND DEVELOPMENT COMPANY LIMITED LIABILITY | — | QD0000842 | — | Inactive | — |
| ATLAS MINING COMPANY LTD. (NON-PERSONAL LIABILITY) | — | BC0045080 | — | Inactive | — |
| ATLAS MOBILE HOME APPRAISALS | — | FM0027839 | 1978-09-11 | Active | — |
| ATLAS MODULAR SOLUTIONS INC. | — | BC1001481 | 2014-05-06 | Active | — |
| ATLAS MORTGAGE CORPORATION | — | BC0547972 | 1997-08-01 | Inactive | — |
| ATLAS MORTGAGES | — | FM1027909 | 2023-10-16 | Active | — |
| ATLAS MOTORCYCLE SUPPLY LTD. | — | BC0366261 | 1989-05-19 | Inactive | — |
| ATLAS MOTORS LTD. | — | BC0027090 | — | Inactive | — |
| ATLAS MUTUAL HOLDINGS LTD. | — | BC0041099 | 1958-03-07 | Inactive | — |
| ATLAS NATURALS | — | FM0329200 | 2002-08-16 | Active | — |
| ATLAS NEGATIVE EMISSIONS MATERIALS, INC. | — | BC1431781 | 2023-08-04 | Active | — |
| ATLAS NETWORKS INC. | — | BC1253357 | 2020-06-15 | Inactive | — |
| ATLAS NEXUS EXPORT INC. | — | BC1597443 | 2026-06-27 | Active | — |
| ATLAS NORTH ADVISORY INC. | — | BC1578948 | 2026-02-23 | Active | — |
| ATLAS NUEVA CREATIVE INC. | — | BC1312576 | 2021-06-25 | Inactive | — |
| ATLAS NUTRACEUTICALS LTD. | — | BC1476751 | 2024-04-18 | Active | — |
| ATLAS OFFICE SOLUTIONS LTD. | — | BC0376687 | 1989-11-21 | Inactive | — |
| ATLAS OIL AND GAS, LIMITED | — | BC0075048 | — | Inactive | — |
| ATLAS OIL BURNER SALES LIMITED | — | BC0021107 | — | Inactive | — |
| ATLAS OIL CO. LTD. | — | BC0012965 | — | Inactive | — |
| ATLAS OILFIELD SERVICES INC. | — | A0099048 | 2016-05-31 | Active | — |
| ATLAS ONE CONSULTING LTD. | — | BC1384795 | 2022-10-31 | Active | — |
| ATLAS ONE DIGITAL SECURITIES INC. | — | BC1236727 | 2020-01-09 | Active | — |
| ATLAS ONE KITCHEN CABINETS LTD. | — | BC1139351 | 2017-10-30 | Active | — |
| ATLAS OPTICAL COMPANY | — | FM0188650 | 1995-10-25 | Active | — |
| ATLAS PACIFIC COAST PLUMBING | — | FM0115520 | 1991-02-05 | Active | — |
| ATLAS PACIFIC TRADING | — | FM0400020 | 2005-06-13 | Inactive | — |
| ATLAS PAINTING & RESTORATIONS LTD. | — | BC0155034 | 1976-11-22 | Active | — |
| ATLAS PARKING LOT SERVICES | — | FM1035667 | 2024-01-17 | Active | — |
| ATLAS PARKING LOT SERVICES LTD. | — | BC0842157 | 2009-01-01 | Inactive | — |
| ATLAS PARKING LOT SERVICES LTD. | — | BC0424489 | 1992-04-23 | Inactive | — |
| ATLAS PAVERS | — | FM1019972 | 2023-06-26 | Active | — |
| ATLAS PAVERS LTD. | — | BC1570932 | 2026-01-02 | Active | — |
| ATLAS PAWN BROKERS | — | FM0187866 | 1995-10-06 | Active | — |
| ATLAS PEAK HOLDINGS LTD. | — | BC1269351 | 2020-10-09 | Active | — |
| ATLAS PEOPLE LTD. | — | BC1430852 | 2023-07-31 | Inactive | — |
| ATLAS PERFORMANCE & GOLF ACADEMY INC. | — | BC1371010 | 2022-07-11 | Active | — |
| ATLAS PERFORMING ARTS SOCIETY | — | S0025943 | 1990-03-07 | Inactive | — |
| ATLAS PEST & WILDLIFE CONTROL LTD. | — | BC1281797 | 2020-12-31 | Active | — |
| ATLAS PEST & WILDLIFE CONTROL LTD. | — | BC1045817 | 2015-08-14 | Inactive | — |
| ATLAS PEST SOLUTIONS | — | FM0704635 | 2016-12-05 | Active | — |
| ATLAS PETROLEUM MARKETS (CANADA) LTD. | — | BC0979903 | 2013-09-09 | Inactive | — |
| ATLAS PHARMA LTD. | — | BC1183212 | 2018-10-16 | Active | — |
| ATLAS PHOTO & VIDEO | — | FM0223585 | 1997-07-15 | Active | — |
| ATLAS PHOTO & VIDEO CONVERSIONS LTD. | — | BC0653255 | 2002-08-20 | Inactive | — |
| ATLAS PHYSIOTHERAPY | — | FM0510187 | 2009-09-02 | Active | — |
| ATLAS PHYSIOTHERAPY CENTRE | — | FM0388509 | 2005-01-21 | Active | — |
| ATLAS PHYSIOTHERAPY CENTRE - PT HEALTH | — | FM0821001 | 2020-10-23 | Active | — |
| ATLAS PILING INC. | — | BC1382621 | 2022-10-14 | Active | — |
| ATLAS PILOT CARS | — | FM0663964 | 2015-06-24 | Active | — |
| ATLAS PIPELINE LTD. | — | BC0810268 | 2007-12-05 | Inactive | — |
| ATLAS PIZZA LTD. | — | BC0127293 | 1974-04-25 | Inactive | — |
| ATLAS PLAZA CANADIAN LIMITED PARTNERSHIP | — | LP0893165 | 2023-03-27 | Active | — |
| ATLAS PLUMBING & HEATING | — | FM0127188 | 1992-02-18 | Active | — |
| ATLAS PLUMBING & HEATING LTD. | — | BC0753600 | 2006-04-01 | Active | — |
| ATLAS PLUMBING & HEATING LTD. | — | BC0423483 | 1992-04-06 | Inactive | — |
| ATLAS PLUMBING LTD. | — | BC0062653 | — | Inactive | — |
| ATLAS PLUS FOOD & DAIRY | — | FM0192768 | 1996-01-23 | Active | — |
| ATLAS POLAR COMPANY, LIMITED | — | A0008935 | — | Inactive | — |
| ATLAS POLE & PILING LTD. | — | BC0064204 | — | Inactive | — |
| ATLAS POOLS | — | FM0458177 | 2007-08-21 | Active | — |
| ATLAS POTS | — | FM0439690 | 2006-12-14 | Active | — |
| ATLAS POTS LTD. | — | BC0789519 | 2007-04-27 | Active | — |
| ATLAS POWER COMPANY LIMITED | — | BC0002014 | — | Inactive | — |
| ATLAS POWER SWEEPING LTD. | — | BC1457078 | 2024-01-01 | Active | — |
| ATLAS POWER SWEEPING LTD. | — | BC0117307 | 1973-04-04 | Inactive | — |
| ATLAS POWER TECHNOLOGIES (VCC) INC. | — | BC1421639 | 2023-06-13 | Active | — |
| ATLAS POWER TECHNOLOGIES INC. | — | BC1085972 | 2016-08-14 | Active | — |
| ATLAS PRESSURE WASHING | — | FM0584730 | 2012-06-03 | Active | — |
| ATLAS PRESSURE WASHING CO. | — | FM0018304 | 1975-06-03 | Active | — |
| ATLAS PRIME CONSTRUCTION 77 | — | FM1078602 | 2025-06-12 | Inactive | — |
| ATLAS PRIME CONSTRUCTION LTD. | — | BC1547402 | 2025-07-08 | Active | — |
| ATLAS PRIME RENOVATIONS77 | — | FM1008538 | 2023-01-26 | Active | — |
| ATLAS PRINTERS LIMITED | — | BC0021804 | — | Inactive | — |
| ATLAS PRIVATE INVESTIGATORS | — | FM0002434 | 1968-04-04 | Active | — |
| ATLAS PRO SERVICE | — | FM0568936 | 2011-10-27 | Active | — |
| ATLAS PRO SERVICE INC. | — | A0058344 | 2002-12-24 | Inactive | — |
| ATLAS PROCESS CONTROLS LTD. | — | BC0609496 | 2000-06-22 | Inactive | — |
| ATLAS PRODUCE SUPPLY LTD. | — | BC0686472 | 2004-02-02 | Inactive | — |
| ATLAS PRODUCE SUPPLY LTD. | — | BC1068298 | 2016-03-15 | Active | — |
| ATLAS PRODUCTIONS INC. | — | BC0374130 | 1989-10-11 | Inactive | — |
| ATLAS PROFESSIONAL SERVICES | — | FM0133139 | 1992-08-07 | Active | — |
| ATLAS PROJECT SERVICES INC. | — | BC0707539 | 2004-10-29 | Inactive | — |
| ATLAS PROJECTS | — | FM0790531 | 2019-10-23 | Active | — |
| ATLAS PROMOTIONS CO. | — | FM0414062 | 2006-01-08 | Active | — |