| Atlantic Vision Marketing Inc. | — | 766420 | — | Active | — |
| ATLANTIC VISUAL MARKETING & COMMUNICATIONS CORP. | — | 502124 | — | Dissolved | — |
| ATLANTIC VISUAL SERVICES | — | 332795 | — | Dissolved | — |
| Atlantic Visual Services | — | 641930 | — | Dissolved | — |
| ATLANTIC VOCATIONAL CONSULTANTS LTD. | — | 1103 | — | Dissolved | — |
| Atlantic VRG Immigration Consultancy and International Employment Agency | — | 697797 | — | Dissolved | — |
| Atlantic W3Z Inc. | — | 716340 | — | Dissolved | — |
| Atlantic Waffle Distribution | — | 689451 | — | Dissolved | — |
| Atlantic Waffle Distribution Ltd. | — | 690676 | — | Dissolved | — |
| ATLANTIC WAFFLES INC. | — | 75299 | — | Dissolved | — |
| Atlantic Walker's Equipment Services | — | 728315 | — | Active | — |
| Atlantic Wallboard | — | 641468 | — | Dissolved | — |
| Atlantic Wallboard | — | 740926 | — | Active | — |
| Atlantic Wallboard Limited Panneaux Atlantiques Limitée | — | 619246 | — | Active | — |
| Atlantic Wallboard Limited Partnership | — | 630255 | — | Dissolved | — |
| ATLANTIC WALLS LIMITED | — | 90537 | — | Dissolved | — |
| Atlantic Warehouse & Cross Dock Inc. | — | 675733 | — | Dissolved | — |
| ATLANTIC WAREHOUSES LTD. | — | 1104 | — | Dissolved | — |
| ATLANTIC WASTE MANAGEMENT LTD. | — | 500672 | — | Dissolved | — |
| Atlantic Water and Well Assessment | — | 698241 | — | Active | — |
| ATLANTIC WATER AND WELL ASSESSMENT | — | 607412 | — | Dissolved | — |
| ATLANTIC WATER CONDITIONING J.M. INC./LES TRAITEMENTS D'EAU J.M. ATLANTIQUE INC. | — | 71183 | — | Dissolved | — |
| ATLANTIC WATER ENVIRONMENT TECHNOLOGICAL SERVICES LTD. | — | 50701 | — | Dissolved | — |
| ATLANTIC WATER EXTRACTION SYSTEMS INC. | — | 48284 | — | Dissolved | — |
| ATLANTIC WATER HEATER MAINTENANCE LTD. | — | 501605 | — | Dissolved | — |
| ATLANTIC WATER METERS | — | 339986 | — | Dissolved | — |
| ATLANTIC WATER TECK. INC. SYSTEME D'EAU ATLANTIQUE INC. | — | 59692 | — | Dissolved | — |
| ATLANTIC WATERFOWL CELEBRATION INC. | — | 23685 | — | Dissolved | — |
| ATLANTIC WATERSCAPE DESIGNS | — | 603712 | — | Dissolved | — |
| ATLANTIC WATERSPORTS INC. | — | 500258 | — | Dissolved | — |
| Atlantic Way Creative Agency | — | 778693 | — | Active | — |
| ATLANTIC WEALTH MANAGEMENT LIMITED | — | 73977 | — | Inactive | — |
| Atlantic Wear Technology Inc. | — | 666265 | — | Active | — |
| ATLANTIC WEATHER & ENVIRONMENTAL CONSULTANTS LTD. | — | 40242 | — | Dissolved | — |
| Atlantic Web Pages | — | 350004 | — | Dissolved | — |
| ATLANTIC WELD-TECH | — | 314460 | — | Dissolved | — |
| ATLANTIC WELDING QAQC CONSULTING | — | 662110 | — | Dissolved | — |
| ATLANTIC WELL DRILLING LTD./LTEE | — | 46896 | — | Dissolved | — |
| Atlantic Wellness Community Center Incorporated | — | 659519 | — | Active | — |
| Atlantic Wetland Solutions | — | 645423 | — | Dissolved | — |
| ATLANTIC WHEELCHAIR/FAUTEUILS ROULANTS DE L'ATLANTIQUE | — | 324837 | — | Dissolved | — |
| ATLANTIC WHEELTRAC | — | 351763 | — | Dissolved | — |
| Atlantic Whitetail Construction Safety & Property Services Ltd. | — | 778418 | — | Active | — |
| ATLANTIC WHOLESALERS | — | 322287 | — | Active | — |
| ATLANTIC WHOLESALERS (J-S-H), LIMITED | — | 90538 | — | Dissolved | — |
| ATLANTIC WHOLESALERS BUYERS GROUP | — | 602732 | — | Dissolved | — |
| ATLANTIC WHOLESALERS LTD. | — | 34737 | — | Active | — |
| ATLANTIC WHOLESALERS' BUYERS GROUP | — | 315338 | — | Dissolved | — |
| ATLANTIC WILD BOAR | — | 343140 | — | Dissolved | — |
| Atlantic Wildlife Institute Inc. / Institut Atlantique de la Faune Inc. | — | 747454 | — | Active | — |
| ATLANTIC WILDLIFE PRINTS | — | 322838 | — | Dissolved | — |
| Atlantic Wills | — | 779628 | — | Active | — |
| ATLANTIC WINDOOR LTD. | — | 56923 | — | Active | — |
| Atlantic Window Cleaning Inc. | — | 704376 | — | Dissolved | — |
| ATLANTIC WINDOW COVERING ASSOCIATION | — | 312673 | — | Dissolved | — |
| ATLANTIC WINDOW WASHERS | — | 645239 | — | Dissolved | — |
| ATLANTIC WINDOW WASHERS | — | 337496 | — | Dissolved | — |
| Atlantic Window Washers | — | 351888 | — | Dissolved | — |
| ATLANTIC WINDOWS | — | 320997 | — | Dissolved | — |
| Atlantic Winds Adventure | — | 613527 | — | Dissolved | — |
| ATLANTIC WINDSHIELD DISTRIBUTORS | — | 662584 | — | Dissolved | — |
| Atlantic Windshield Distributors | — | 752692 | — | Active | — |
| ATLANTIC WINTERNATIONALS INC./LES NATIONEAUX DE L'ATLANTIQUE DE L'HIVER INC. | — | 25360 | — | Dissolved | — |
| ATLANTIC WOOD PRODUCTS | — | 334353 | — | Dissolved | — |
| ATLANTIC WOOD PRODUCTS | — | 302373 | — | Dissolved | — |
| ATLANTIC WOOD TRUSS FABRICATORS ASSOCIATION INC. | — | 23380 | — | Active | — |
| Atlantic Woodworking Machinery Solutions | — | 656530 | — | Dissolved | — |
| ATLANTIC WOODWORKING, MACHINERY AND TOOLING LIMITED | — | 90539 | — | Dissolved | — |
| ATLANTIC WORKFORCE SUPPLIES | — | 714004 | — | Dissolved | — |
| ATLANTIC WORKPLACE LAW INSTITUTE | — | 773758 | — | Active | — |
| ATLANTIC WREATHS INC. | — | 503132 | — | Dissolved | — |
| ATLANTIC XTREME PAINTBALL SPORTS | — | 351728 | — | Dissolved | — |
| ATLANTIC YACHT SALES LTD. | — | 33398 | — | Dissolved | — |
| ATLANTIC YAMAHA | — | 328045 | — | Dissolved | — |
| ATLANTIC YAMAHA | — | 346532 | — | Dissolved | — |
| ATLANTIC YARD CARE | — | 322468 | — | Dissolved | — |
| ATLANTIC YARNS INC./LES FILES ATLANTIQUE INC. | — | 503791 | — | Dissolved | — |
| Atlantic Yoga Therapy | — | 753718 | — | Active | — |
| ATLANTIC YOUTH BOWLING COUNCIL, INC. | — | 20082 | — | Dissolved | — |
| Atlantic Youth Clothing Ltd. | — | 757396 | — | Active | — |
| Atlantic Youth I.D. Services Inc. | — | 512892 | — | Dissolved | — |
| ATLANTIC ZINC EXPLORATION INC. | — | 516352 | — | Active | — |
| ATLANTIC(QUE) IMAGE-ART INC. | — | 690682 | — | Pending | — |
| ATLANTIC-ALLSTAR GENETICS LTD. | — | 51302 | — | Dissolved | — |
| Atlantic-Navis Vessel Services Ltd. | — | 657031 | — | Pending | — |
| Atlantic-Thermal Infrared Solutions | — | 618412 | — | Dissolved | — |
| ATLANTICA "FOR SALE BY OWNER" SERVICES | — | 340136 | — | Dissolved | — |
| Atlantica BioEnergy Task Force | — | 637089 | — | Dissolved | — |
| Atlantica Business Financing | — | 633163 | — | Dissolved | — |
| Atlantica Centre for Energy Inc. | — | 622386 | — | Active | — |
| ATLANTICA CENTRE FOR THE ARTS INC. | — | 627447 | — | Dissolved | — |
| ATLANTICA COLLEGE INC. | — | 678348 | — | Dissolved | — |
| Atlantica Construction Inc. | — | 642707 | — | Pending | — |
| Atlantica Diversified Transportation Systems Inc. | — | 651619 | — | Dissolved | — |
| ATLANTICA FILMS INC. | — | 50009 | — | Dissolved | — |
| ATLANTICA FOOD BROKERS | — | 630115 | — | Dissolved | — |
| ATLANTICA INTERNATIONAL LEARNING, INC. | — | 506801 | — | Dissolved | — |
| Atlantica Learning Corporation, Inc. | — | 508371 | — | Dissolved | — |
| ATLANTICA LIVE | — | 645425 | — | Dissolved | — |
| ATLANTICA LIVE RECORDS | — | 645427 | — | Dissolved | — |
| Atlantica Outdoor Recreation Center Inc. | — | 750067 | — | Active | — |
| ATLANTICA PACKAGING SOURCE | — | 648701 | — | Dissolved | — |
| Atlantica Pharmacy Wholesale Ltd. | — | 734496 | — | Active | — |
| Atlantica Sales Group Inc. | — | 514637 | — | Dissolved | — |
| ATLANTICA STEEPLE JACKS | — | 302374 | — | Dissolved | — |
| ATLANTICA STUDIOS | — | 645426 | — | Dissolved | — |
| Atlanticade Motorcycle Festival Inc. | — | 635351 | — | Dissolved | — |
| ATLANTICAL REALTY | — | 607933 | — | Dissolved | — |
| ATLANTICAL RESTAURANT RESORT LTD. | — | 607482 | — | Dissolved | — |
| ATLANTICAN CONSULTING INC. | — | 720933 | — | Active | — |
| ATLANTICAN FISHERIES INC | — | 679496 | — | Active | — |
| AtlantiCan Manufacturing, Trading & Service Inc. | — | 694616 | — | Active | — |
| AtlantiCare Health Providers Inc./AtlantiCare Services Santé Inc. | — | 686767 | — | Dissolved | — |
| atlanticavsolutions Inc. | — | 706831 | — | Active | — |
| Atlanticcan Cleaning Solutions | — | 725309 | — | Pending | — |
| AtlanticCan Pilots & Services Ltd. | — | 689150 | — | Dissolved | — |
| AtlanticGuard IT Systems Inc. | — | 771358 | — | Active | — |
| AtlantiCleaners Ltd. | — | 736948 | — | Dissolved | — |
| ATLANTICMETROISP | — | 353233 | — | Dissolved | — |
| AtlantiCoast Paradise Rentals | — | 772381 | — | Active | — |
| Atlanticom Inc. | — | 59918 | — | Dissolved | — |
| ATLANTICOM INCORPORATED | — | 33464 | — | Dissolved | — |
| Atlanticrest Productions | — | 640988 | — | Dissolved | — |
| AtlanticWorks Digital Growth | — | 770247 | — | Dissolved | — |
| AtlanticWorks Digital Solutions Inc. | — | 771525 | — | Active | — |
| Atlantida International Study Solutions | — | 687813 | — | Dissolved | — |
| Atlantida Organic Cleaning | — | 682271 | — | Dissolved | — |
| ATLANTIK AIRCRAFT SERVICES INC. | — | 32798 | — | Dissolved | — |
| ATLANTIK MEDIA PUBLISHING | — | 622510 | — | Dissolved | — |
| ATLANTIK SMUGGLER | — | 341013 | — | Dissolved | — |
| ATLANTIKA CREATIVITY GROUP | — | 348190 | — | Dissolved | — |
| Atlantika Dance Incorporated | — | 765938 | — | Active | — |
| ATLANTIQUE CONSTRUCTION K.B. LTÉE | — | 632650 | — | Active | — |
| ATLANTIQUE IMAGE ET SON INC./ATLANTIQUE VIDEO & SOUND INC. | — | 72075 | — | Dissolved | — |
| ATLANTIQUE MANAGEMENT K.B. LTÉE | — | 660163 | — | Dissolved | — |
| Atlantique Nord Innovation Inc. | — | 745826 | — | Active | — |
| ATLANTIQUE REFRIGERATION | — | 302376 | — | Dissolved | — |
| Atlantique/Pacifique Consulting | — | 646475 | — | Dissolved | — |
| ATLANTIS ALLOYS LTD. | — | 90540 | — | Dissolved | — |
| ATLANTIS DESIGN | — | 613671 | — | Dissolved | — |
| Atlantis Electric Inc. | — | 757526 | — | Dissolved | — |
| ATLANTIS ELECTRICAL CONTRACTORS LTD. | — | 1106 | — | Dissolved | — |
| ATLANTIS FOOD PRODUCTS INC. | — | 507909 | — | Dissolved | — |
| ATLANTIS INDUSTRIAL DEVELOPMENT CO. LTD. | — | 90541 | — | Dissolved | — |
| Atlantis Maison Inc. | — | 716024 | — | Active | — |
| Atlantis Masonry 2022 Ltd. | — | 733478 | — | Active | — |
| Atlantis Masonry Ltd. | — | 55593 | — | Dissolved | — |
| ATLANTIS MICROCOMPUTER (N.B.) LTD. | — | 36291 | — | Dissolved | — |
| ATLANTIS NEON LTEE/LTD. | — | 58772 | — | Dissolved | — |
| Atlantis Rental Management Services | — | 657604 | — | Dissolved | — |
| ATLANTIS ROOFING INC. | — | 683462 | — | Pending | — |
| ATLANTIS SEA FARMS LTD. | — | 1107 | — | Dissolved | — |
| ATLANTIS VINYL SIDING CLEANERS | — | 336376 | — | Dissolved | — |
| Atlantis Water and Air | — | 709145 | — | Dissolved | — |
| ATLANTIS WATER BED | — | 315818 | — | Dissolved | — |
| ATLANTISPHERE CONVENTION & TRAVEL CONSULTANTS OF ATLANTIC CANADA | — | 302377 | — | Dissolved | — |
| Atlantix Media Inc. | — | 750791 | — | Active | — |
| Atlantra Enterprises Inc. | — | 508150 | — | Dissolved | — |
| Atlar Designs Inc. | — | 754077 | — | Active | — |
| Atlas ABC Canada ULC | — | 619729 | — | Active | — |
| ATLAS ALLOYS HOLDINGS LIMITED | — | 17128 | — | Dissolved | — |
| ATLAS ALLOYS INC. | — | 75378 | — | Merged | — |
| Atlas Alternative Vet Care | — | 717900 | — | Active | — |
| Atlas Apartments Limited | — | 737150 | — | Active | — |
| ATLAS ASSET MANAGEMENT INC. | — | 70018 | — | Dissolved | — |
| Atlas Auto Equipment of Canada | — | 710661 | — | Active | — |
| ATLAS AUTO TRANSMISSIONS LTD. | — | 90545 | — | Dissolved | — |
| Atlas Bookkeeping | — | 750188 | — | Active | — |
| Atlas Building Components | — | 708973 | — | Active | — |
| ATLAS BUILDING SUPPLIES | — | 302379 | — | Dissolved | — |
| ATLAS BUILDING SUPPLIES LIMITED | — | 90542 | — | Dissolved | — |
| Atlas Building Systems | — | 708972 | — | Active | — |
| Atlas CB Limited | — | 710805 | — | Dissolved | — |
| ATLAS COLD LOGISTICS | — | 353544 | — | Dissolved | — |
| Atlas Cold Storage Canada Limited/Entrepot Frigorifique Atlas Canada Limitee | — | 77775 | — | Merged | — |
| ATLAS COLD STORAGE CANADA LIMITED/ENTREPOT FRIGORIFIQUE ATLAS CANADA LIMITEE | — | 77945 | — | Merged | — |
| ATLAS COLD STORAGE MIDWEST LIMITED | — | 628818 | — | Merged | — |
| ATLAS CONSTRUCTION MARITIMES LIMITED | — | 59105 | — | Withdrawn | — |
| ATLAS CONSTRUCTION MARITIMES LIMITED | — | 1108 | — | Merged | — |
| ATLAS COPCO CANADA INC. | — | 76316 | — | Merged | — |
| ATLAS COPCO CANADA INC. | — | 726800 | — | Merged | — |
| Atlas Copco Canada Inc. | — | 76904 | — | Merged | — |
| ATLAS COPCO CANADA INC. | — | 744569 | — | Active | — |
| ATLAS COPCO CANADA INC. | — | 689192 | — | Merged | — |
| ATLAS COPCO COMPRESSORS CANADA | — | 654881 | — | Active | — |
| ATLAS COPCO CONSTRUCTION AND MINING | — | 654883 | — | Dissolved | — |
| ATLAS COPCO CONSTRUCTION EQUIPMENT CANADA | — | 647619 | — | Dissolved | — |
| ATLAS COPCO CUSTOMER FINANCE CANADA | — | 626525 | — | Dissolved | — |
| ATLAS COPCO EXPLORATION PRODUCTS | — | 654882 | — | Dissolved | — |
| ATLAS COPCO MINING AND ROCK EXCAVATION TECHNIQUE CANADA | — | 658727 | — | Dissolved | — |
| ATLAS COPCO POWER TECHNIQUE CANADA | — | 701750 | — | Active | — |
| ATLAS COPCO PRIME ENERGY | — | 637219 | — | Dissolved | — |
| ATLAS COPCO RENTAL | — | 654888 | — | Active | — |
| ATLAS COPCO THIESSEN | — | 625276 | — | Dissolved | — |
| ATLAS COPCO TOOLS AND ASSEMBLY SYSTEMS (CANADA) | — | 654884 | — | Active | — |
| Atlas Copco Vacuum Canada | — | 745784 | — | Active | — |
| ATLAS EDITIONS INC. EDITIONS ATLAS INC. | — | 502402 | — | Dissolved | — |
| ATLAS ENERGY SYSTEMS INC. | — | 774698 | — | Active | — |
| Atlas Engineered Products | — | 708970 | — | Active | — |
| Atlas Engineered Solutions | — | 708971 | — | Active | — |