| ATLAS ENGINEERING AND MACHINE COMPANY LIMITED | — | 17130 | — | Dissolved | — |
| Atlas Eye Physicians | — | 721924 | — | Pending | — |
| Atlas Films | — | 699885 | — | Dissolved | — |
| Atlas Films | — | 679208 | — | Dissolved | — |
| Atlas Films Inc. | — | 709420 | — | Active | — |
| Atlas Financial Planning | — | 650685 | — | Dissolved | — |
| ATLAS FLOORING LTD. | — | 90543 | — | Dissolved | — |
| Atlas Food Merchants Inc. | — | 512203 | — | Dissolved | — |
| Atlas Ideal Metals Inc. | — | 77812 | — | Merged | — |
| Atlas Ideal Metals Inc. | — | 76833 | — | Merged | — |
| Atlas Industrial Canada Inc. | — | 674593 | — | Dissolved | — |
| ATLAS INSULATION SYSTEMS LTD. | — | 1109 | — | Dissolved | — |
| Atlas Integrated Services | — | 715400 | — | Dissolved | — |
| ATLAS LP | — | 750620 | — | Dissolved | — |
| ATLAS LUMBER, LIMITED | — | 90544 | — | Dissolved | — |
| ATLAS MARKETING & DISTRIBUTION LTD. | — | 33633 | — | Dissolved | — |
| ATLAS MICRONET | — | 631770 | — | Dissolved | — |
| ATLAS Mobile Mechanic Inc. | — | 755594 | — | Active | — |
| ATLAS ONE DIGITAL SECURITIES INC. | — | 752334 | — | Active | — |
| ATLAS PAINTERS | — | 302378 | — | Dissolved | — |
| Atlas Peak Home & Office Supplies | — | 745143 | — | Active | — |
| ATLAS PLUMBING & HEATING LTD. | — | 1110 | — | Dissolved | — |
| ATLAS PRESS | — | 301160 | — | Dissolved | — |
| ATLAS PRESS LTD. | — | 1111 | — | Dissolved | — |
| Atlas Pressure Washing | — | 724362 | — | Pending | — |
| ATLAS PRO SERVICE | — | 660578 | — | Active | — |
| ATLAS PRO SERVICE INC. | — | 604320 | — | Merged | — |
| ATLAS PRODUCTS LTD. | — | 1112 | — | Dissolved | — |
| Atlas Property Maintenance | — | 682047 | — | Dissolved | — |
| ATLAS RENTALS | — | 301380 | — | Dissolved | — |
| Atlas Rituels Candle & Soap | — | 778849 | — | Active | — |
| ATLAS ROOFING AND HOME IMPROVEMENT LTD. | — | 30833 | — | Dissolved | — |
| Atlas Shield Capital Inc. | — | 771344 | — | Active | — |
| ATLAS STEEL INC./ACIER ATLAS INC. | — | 72109 | — | Dissolved | — |
| Atlas Structural Systems | — | 670164 | — | Active | — |
| Atlas Structural Systems | — | 696691 | — | Dissolved | — |
| ATLAS STRUCTURAL SYSTEMS LIMITED / SYSTÈMES STRUCTURAUX ATLAS LIMITÉE | — | 669968 | — | Active | — |
| Atlas Sun Holdings Incorporated | — | 743178 | — | Active | — |
| ATLAS SUPPLY CHAIN SERVICES LIMITED | — | 78109 | — | Dissolved | — |
| Atlas Taxi Services | — | 769359 | — | Dissolved | — |
| ATLAS TERMINAL COMPANY (CANADA) LTD. | — | 70113 | — | Dissolved | — |
| ATLAS TESTING LABS AND SERVICES (NEW BRUNSWICK) LTD. | — | 35177 | — | Dissolved | — |
| ATLAS TOURS LTD. | — | 35891 | — | Dissolved | — |
| ATLAS TRADE VENTURES | — | 349318 | — | Dissolved | — |
| Atlas Truss | — | 708968 | — | Active | — |
| ATLAS TURNER INC. | — | 17131 | — | Dissolved | — |
| Atlas Ultra Mobility Ride Services | — | 771815 | — | Active | — |
| ATLAS VAN LINES (CANADA) LTD. | — | 70112 | — | Merged | — |
| ATLAS VAN LINES (CANADA) LTD./LIGNE DE TRANSPORT ATLAS (CANADA) LTEE | — | 73214 | — | Active | — |
| ATLAS VAN LINES, INC. | — | 73578 | — | Active | — |
| ATLAS WINE MERCHANTS COMPANY | — | 338665 | — | Dissolved | — |
| Atlas Worldwide Logistics Ltd. | — | 744706 | — | Active | — |
| Atlas-Apex Roofing (NB) Inc. | — | 775157 | — | Active | — |
| Atlas-Axis Inc. | — | 751823 | — | Active | — |
| ATLAS-AXIS INC. | — | 38224 | — | Merged | — |
| AtlasCore Trading Ltd. | — | 775205 | — | Active | — |
| ATLASMAPLE SUPPLY | — | 776653 | — | Active | — |
| ATLAW TITLES INC. | — | 609808 | — | Dissolved | — |
| ATLCA Investments Inc. | — | 669790 | — | Dissolved | — |
| ATLCSTAR HOLDINGS INC. | — | 719060 | — | Active | — |
| ATLEASE CORPORATION | — | 70142 | — | Dissolved | — |
| ATLIFIC (N. B.) LTD. | — | 90498 | — | Dissolved | — |
| ATLIFIC HOTELS & RESORTS | — | 325471 | — | Dissolved | — |
| ATLIFIC INC. | — | 17132 | — | Dissolved | — |
| ATLIS - Atlantic Internet Services Inc | — | 604157 | — | Dissolved | — |
| ATLON DEVELOPMENTS LTD. | — | 1113 | — | Dissolved | — |
| Atluscan Transport Inc. | — | 775210 | — | Active | — |
| ATM CONSTRUCTION LTD. | — | 54777 | — | Dissolved | — |
| ATM Consulting Ltd. | — | 676158 | — | Active | — |
| ATM Global Inc. | — | 741215 | — | Active | — |
| ATM Services Atlantic Ltd. | — | 510692 | — | Dissolved | — |
| ATM WIZARD COMMUNICATIONS | — | 635907 | — | Dissolved | — |
| ATMA HOLDINGS LTD. | — | 55310 | — | Dissolved | — |
| ATMAN LP | — | 764272 | — | Active | — |
| ATMAR INC. | — | 31338 | — | Dissolved | — |
| ATMC Travel (Acadia Tours Maritime Canada Travel ) | — | 660380 | — | Dissolved | — |
| ATMOSHÈRE COMMUNICATION | — | 616638 | — | Dissolved | — |
| ATMOSPHAIR STUDIO | — | 691272 | — | Dissolved | — |
| Atmuri McGrath Professional Corporation | — | 635998 | — | Dissolved | — |
| ATMUS EQUIPMENT LIMITED | — | 21565 | — | Dissolved | — |
| ATMUS EQUIPMENT LIMITED | — | 90548 | — | Merged | — |
| ATMUS EQUIPMENT LIMITED | — | 1114 | — | Merged | — |
| ATMUS SERVICE LIMITED | — | 90546 | — | Merged | — |
| ATMUS SERVICE LIMITED | — | 90497 | — | Dissolved | — |
| Atmytable/Amatable Holistic Health | — | 672111 | — | Dissolved | — |
| Atmytable/Amatable Holistic Health | — | 708558 | — | Dissolved | — |
| ATNIV ENTERPRISES | — | 635025 | — | Dissolved | — |
| ATNIV INC. | — | 693769 | — | Dissolved | — |
| ATO Acadian Tech Online | — | 723549 | — | Pending | — |
| ATO NI 88 Boxes Ltd. | — | 714218 | — | Dissolved | — |
| ATO Technical Group | — | 636291 | — | Dissolved | — |
| ATOCA N.-B. | — | 340650 | — | Dissolved | — |
| ATOCA N.-B. Inc | — | 618106 | — | Merged | — |
| ATOCA N.-B. Inc. | — | 672752 | — | Active | — |
| ATOCATIERE CHIASSON LTEE/CHIASSON CRANBERRIES LTD. | — | 508262 | — | Active | — |
| ATOM ELECTRIC | — | 302380 | — | Dissolved | — |
| ATOMAIR Heating and Cooling | — | 700607 | — | Active | — |
| ATOMIC CONSTRUCTION | — | 632792 | — | Dissolved | — |
| ATOMIC CONSTRUCTION INC. | — | 601637 | — | Dissolved | — |
| ATOMIC CONTRACTORS & CONSULTANTS LIMITED | — | 1115 | — | Merged | — |
| ATOMIC ENERGY OF CANADA LIMITED - L'ENERGIE ATOMIQUE DU CANADA LIMITEE | — | 19478 | — | Dissolved | — |
| ATOMIC ENERGY OF CANADA LIMITED ÉNERGIE ATOMIQUE DU CANADA LIMITÉE | — | 606518 | — | Dissolved | — |
| Atomic Lizard QA Inc. | — | 774939 | — | Active | — |
| ATOMIC RENTALS & PROPERTY MANAGEMENT | — | 335862 | — | Dissolved | — |
| ATOMIC TATTOO | — | 686333 | — | Dissolved | — |
| ATOMIC TATTOOS | — | 774333 | — | Active | — |
| ATOMIC TCT LOGISTICS INC. | — | 76528 | — | Dissolved | — |
| ATOMIC WELDING LTD. | — | 1116 | — | Dissolved | — |
| AtomikNB Inc. | — | 670514 | — | Dissolved | — |
| Atominos Consulting Services | — | 730129 | — | Active | — |
| ATOMINOS TECHNOLOGY SOLUTIONS LTD. | — | 735340 | — | Dissolved | — |
| Atomoverde Canada Inc. | — | 723957 | — | Active | — |
| ATOP Technologies Inc. | — | 635954 | — | Dissolved | — |
| Atos Canada | — | 744488 | — | Active | — |
| Atos Group Canada Inc. | — | 721923 | — | Merged | — |
| Atos Group Canada Inc. | — | 773716 | — | Active | — |
| Atos Group Canada Inc. | — | 769956 | — | Merged | — |
| Atos Inc. | — | 710558 | — | Merged | — |
| Atos Inc. | — | 651618 | — | Merged | — |
| Atos Medical | — | 744487 | — | Active | — |
| Atos Medical Canada | — | 744489 | — | Active | — |
| ATOS MEDICAL CANADA INC. | — | 695504 | — | Merged | — |
| ATOS TECHNOLOGIES CANADA INC. | — | 741058 | — | Dissolved | — |
| Atoun Renergy Solutions Corp. | — | 764353 | — | Active | — |
| ATOUT CONSTRUCTION LTD. - LA CONSTRUCTION ATOUT LTEE | — | 31832 | — | Dissolved | — |
| ATOUT CULTURE | — | 661327 | — | Pending | — |
| Atoya Incorporated | — | 603626 | — | Dissolved | — |
| ATP Engineering and Consulting | — | 708286 | — | Active | — |
| ATP General Partner Inc. | — | 727348 | — | Dissolved | — |
| ATPRO CONSTRUCTION LTD. | — | 1117 | — | Dissolved | — |
| ATPRO HOLDINGS LTD. | — | 1118 | — | Merged | — |
| ATPRO METAL SPECIALTIES LTD. | — | 1119 | — | Dissolved | — |
| ATPRO SALES AGENCY LTD. | — | 90549 | — | Dissolved | — |
| ATPRO SYSTEMS INCORPORATED | — | 46778 | — | Dissolved | — |
| ATPRO TRUCKING LTD. | — | 39524 | — | Dissolved | — |
| ATQ LABS CANADA LTD. | — | 772313 | — | Active | — |
| ATR Foresterie Inc. | — | 711702 | — | Active | — |
| ATR Mechanical Ltd. | — | 720409 | — | Active | — |
| ATR PRODUCTIONS INC. | — | 52485 | — | Dissolved | — |
| ATR WELL DRILLING INCORPORATED | — | 72660 | — | Inactive | — |
| Atradius Credit Insurance N.V. | — | 626651 | — | Dissolved | — |
| Atrato Limited Partnership | — | 689858 | — | Dissolved | — |
| ATREX FARMS LTD. | — | 1120 | — | Dissolved | — |
| ATRIA MANAGEMENT CANADA, ULC | — | 677479 | — | Active | — |
| Atria Retirement Canada | — | 677765 | — | Active | — |
| Atrium Acupuncture | — | 745113 | — | Active | — |
| ATRIUM INNOVATIONS INC. | — | 703696 | — | Merged | — |
| ATRIUM INNOVATIONS INC. | — | 703695 | — | Merged | — |
| ATRIUM INNOVATIONS INC. | — | 703694 | — | Merged | — |
| ATRIUM INNOVATIONS INC. | — | 683493 | — | Merged | — |
| ATRIUM INNOVATIONS INC. | — | 744975 | — | Merged | — |
| ATRIUM PLUS ENTERPRISES | — | 313511 | — | Dissolved | — |
| ATS Advanced Technology Services Canada, Inc. | — | 654412 | — | Active | — |
| ATS Andlauer Transportation Services | — | 621364 | — | Dissolved | — |
| ATS ANDLAUER TRANSPORTATION SERVICES INC. | — | 77253 | — | Dissolved | — |
| ATS Andlauer Transportation Services Limited Partnership | — | 621358 | — | Dissolved | — |
| ATS APPLICATORS | — | 642928 | — | Dissolved | — |
| ATS AQUATEC SYSTEMS LTD. | — | 32596 | — | Dissolved | — |
| ATS ARCHITECTURAL TECHNOLOGY SERVICES | — | 336744 | — | Dissolved | — |
| ATS Bakery Cafe Incorporated | — | 762642 | — | Active | — |
| ATS CLEANING SYSTEMS LTD. | — | 33701 | — | Dissolved | — |
| ATS COMPUTER SERVICES INC. | — | 515351 | — | Dissolved | — |
| ATS CONSTRUCTION AND CONSULTING | — | 689758 | — | Pending | — |
| ATS Electric Tech Ltd. | — | 611218 | — | Dissolved | — |
| ATS Elite Sports Inc. | — | 773544 | — | Active | — |
| ATS Healthcare | — | 652882 | — | Dissolved | — |
| ATS Healthcare | — | 760440 | — | Dissolved | — |
| ATS HEALTHCARE INC. | — | 621359 | — | Inactive | — |
| ATS HEALTHCARE INC. | — | 751992 | — | Dissolved | — |
| ATS Investment Inc. | — | 695572 | — | Active | — |
| ATS Repair & Renovations | — | 623253 | — | Dissolved | — |
| ATS RETAIL SOLUTIONS | — | 647948 | — | Dissolved | — |
| ATS Services Ltd. | — | 607171 | — | Dissolved | — |
| ATS SERVICES LTD. | — | 689744 | — | Merged | — |
| ATS SERVICES LTD. | — | 690857 | — | Merged | — |
| ATS SERVICES LTD. | — | 732462 | — | Active | — |
| ATS THINNING | — | 340467 | — | Dissolved | — |
| ATS THINNING | — | 349528 | — | Dissolved | — |
| ATS TRANSPORTATION SYSTEMS INC. | — | 46508 | — | Dissolved | — |
| ATSCO LTD. | — | 1121 | — | Merged | — |
| ATSCO OFFICE EXPRESS | — | 333975 | — | Dissolved | — |
| ATSEA MANAGEMENT LTD. | — | 20252 | — | Dissolved | — |
| AtSixty Real Estate Inc. | — | 737305 | — | Active | — |
| ATST Holdings Ltd. | — | 751917 | — | Active | — |
| ATT ACQUISITION PARTNERSHIP | — | 353157 | — | Dissolved | — |
| ATT Repairs Ltd. | — | 751172 | — | Active | — |
| ATTA ELEVATORS HOLDINGS CORP. | — | 766327 | — | Active | — |
| ATTA'S CANADA ENTERPRISE INC. | — | 732876 | — | Dissolved | — |
| ATTABOY ENTERPRISES INC. | — | 44032 | — | Dissolved | — |
| Attaboy Farms Inc. | — | 664381 | — | Dissolved | — |
| ATTABOY GARLIC INC. | — | 662739 | — | Dissolved | — |
| ATTACCA ENTERPRISES LTD. | — | 32412 | — | Active | — |
| ATTACHMATE CANADA LIMITED | — | 640707 | — | Withdrawn | — |
| Attachmate Canada Limited | — | 507529 | — | Merged | — |
| AttaDot Incorporated | — | 692431 | — | Dissolved | — |
| ATTAIN FINANCE CANADA, INC. | — | 667158 | — | Merged | — |
| Attecca Holdings Inc. | — | 650480 | — | Merged | — |
| Attends Healthcare Products, Inc. | — | 632967 | — | Active | — |
| Attention to Detail atd Hartland | — | 710580 | — | Dissolved | — |
| Attention To Detail Ltd | — | 631572 | — | Dissolved | — |