| Atlantic Home Lenders Inc. | — | 641768 | — | Dissolved | |
| Atlantic Home Tech Ltd. | — | 606136 | — | Dissolved | |
| Atlantic Horizon Communication | — | 765776 | — | Dissolved | |
| Atlantic Hot Tub (Fredericton) | — | 667888 | — | Dissolved | |
| Atlantic Hotspots | — | 641612 | — | Dissolved | |
| Atlantic HydroGreens | — | 701856 | — | Dissolved | |
| Atlantic Hydrogen Inc. | — | 602045 | — | Withdrawn | |
| Atlantic Hydrogeology Mining Services Ltd. | — | 729506 | — | Active | |
| Atlantic Hydroseeding | — | 601986 | — | Dissolved | |
| Atlantic ICF Ltd. | — | 649976 | — | Dissolved | |
| Atlantic ITCoSourceSA | — | 654451 | — | Dissolved | |
| Atlantic Icon Performance | — | 655989 | — | Dissolved | |
| Atlantic Images | — | 629621 | — | Dissolved | |
| Atlantic Impact Relations Inc. | — | 709782 | — | Active | |
| Atlantic Impervicoat | — | 708541 | — | Dissolved | |
| Atlantic Impervicoat (2019) Ltd. | — | 708500 | — | Dissolved | |
| Atlantic Indian Bistro Ltd. | — | 753410 | — | Active | |
| Atlantic Industrial Coatings | — | 731850 | — | Active | |
| Atlantic Industrial Diving & Construction | — | 604163 | — | Dissolved | |
| Atlantic Industrial Medic Services | — | 669963 | — | Dissolved | |
| Atlantic Industrial Scaffolding, Ltd. | — | 659152 | — | Merged | |
| Atlantic Industries (North America) Inc. | — | 655073 | — | Active | |
| Atlantic Industries (North America) Inc. | — | 513840 | — | Merged | |
| Atlantic Infinity Properties Inc. | — | 743649 | — | Dissolved | |
| Atlantic Inner Awareness Center | — | 674211 | — | Dissolved | |
| Atlantic Innov Technology Inc. | — | 718480 | — | Dissolved | |
| Atlantic Insights Group Inc. | — | 746502 | — | Active | |
| Atlantic Institute for Moral Injury Inc. | — | 772916 | — | Active | |
| Atlantic Institute of Barbers Inc. | — | 763819 | — | Active | |
| Atlantic Institutional Furniture and Pews | — | 631948 | — | Dissolved | |
| Atlantic Insulation and Construction Ltd | — | 618380 | — | Dissolved | |
| Atlantic Integrative Cancer Centre - Centre de cancérologie intégrative de l'Atlantique (AICC - CCIA) | — | 691369 | — | Dissolved | |
| Atlantic Interactive Media Inc. | — | 601078 | — | Dissolved | |
| Atlantic International Market | — | 726628 | — | Pending | |
| Atlantic Investment & Insurance Benefits Inc. | — | 628843 | — | Dissolved | |
| Atlantic Investment Venture | — | 622928 | — | Dissolved | |
| Atlantic Java | — | 345595 | — | Dissolved | |
| Atlantic Jewellery Giftware Travellers Inc. | — | 653117 | — | Dissolved | |
| Atlantic Job Connect | — | 751564 | — | Active | |
| Atlantic Jobs and Immigration Solutions Ltd. | — | 702888 | — | Active | |
| Atlantic Judgment Recovery | — | 607526 | — | Dissolved | |
| Atlantic Junior Attack Academy | — | 718101 | — | Dissolved | |
| Atlantic K-9 Drug Detection Services | — | 691824 | — | Dissolved | |
| Atlantic Kestrel Limited Partnership | — | 665025 | — | Dissolved | |
| Atlantic Kestrel Shipping Incorporated | — | 664995 | — | Dissolved | |
| Atlantic Khalsa Darbar | — | 710278 | — | Active | |
| Atlantic Kids Clothing Ltd. | — | 671281 | — | Active | |
| Atlantic King Seafood Ltd. | — | 717241 | — | Dissolved | |
| Atlantic Kingfisher Limited Partnership | — | 400612 | — | Active | |
| Atlantic Kingfisher Shipping Limited | — | 515743 | — | Active | |
| Atlantic LED Display Ltd. | — | 678624 | — | Dissolved | |
| Atlantic Lacrosse Group | — | 710690 | — | Dissolved | |
| Atlantic Land Development | — | 693446 | — | Active | |
| Atlantic Land Drafting and Consultants | — | 681711 | — | Dissolved | |
| Atlantic Language College Inc. | — | 618187 | — | Dissolved | |
| Atlantic Language Culture International Inc. | — | 733281 | — | Active | |
| Atlantic Laser Cleaning and Restorations | — | 734705 | — | Active | |
| Atlantic Laser Healing Center | — | 616018 | — | Dissolved | |
| Atlantic Laser Works | — | 712249 | — | Active | |
| Atlantic Lawn and Snow Services | — | 773070 | — | Active | |
| Atlantic Legal Defence Fund Corporation | — | 669028 | — | Active | |
| Atlantic Lifestyle Screens | — | 675886 | — | Dissolved | |
| Atlantic Lights, Park & Play Agencies | — | 625415 | — | Dissolved | |
| Atlantic Lights, Park & Play Agencies | — | 625818 | — | Dissolved | |
| Atlantic Line Ventures Ltd. | — | 509193 | — | Dissolved | |
| Atlantic Linen & Restoration Inc. | — | 680438 | — | Dissolved | |
| Atlantic Link Properties | — | 723848 | — | Active | |
| Atlantic Liquidation Supply | — | 720004 | — | Pending | |
| Atlantic Loop Master LTD. | — | 637394 | — | Active | |
| Atlantic Lotus International Trade Inc. | — | 631483 | — | Dissolved | |
| Atlantic Lyme Disease Association (ALTA) | — | 677712 | — | Dissolved | |
| Atlantic M & A Business Brokers | — | 764126 | — | Active | |
| Atlantic M&A | — | 764196 | — | Active | |
| Atlantic Maple Trees | — | 686463 | — | Dissolved | |
| Atlantic Maracana Club Inc. | — | 761416 | — | Active | |
| Atlantic Marble & Granite Ltd. | — | 618304 | — | Dissolved | |
| Atlantic Marine Facility Operators Inc. Les Opérateurs des Installations Marines de l'Atlantique Inc. | — | 609397 | — | Dissolved | |
| Atlantic Market Media | — | 707083 | — | Active | |
| Atlantic Martial Arts Academy Inc. | — | 689091 | — | Active | |
| Atlantic Massage Supply | — | 732944 | — | Active | |
| Atlantic Master Engine Rebuilders Inc. | — | 727642 | — | Active | |
| Atlantic Master Plaster | — | 658669 | — | Dissolved | |
| Atlantic Mature Living Inc. | — | 672150 | — | Active | |
| Atlantic Mazda | — | 725685 | — | Active | |
| Atlantic Mechanical Technology Ltd. | — | 752184 | — | Active | |
| Atlantic MediSpa Services Inc. | — | 649992 | — | Dissolved | |
| Atlantic Mediaworks Ltd. | — | 30361 | — | Active | |
| Atlantic Medical Imaging Services Inc. | — | 643751 | — | Dissolved | |
| Atlantic Medical Mobility Service & Supplies | — | 667746 | — | Dissolved | |
| Atlantic Mergers & Acquisitions | — | 764201 | — | Active | |
| Atlantic Mergers & Acquisitions Inc. | — | 746724 | — | Active | |
| Atlantic Merlin Limited Partnership | — | 670920 | — | Active | |
| Atlantic Merlin Shipping Limited | — | 670891 | — | Active | |
| Atlantic Metaclad | — | 676612 | — | Dissolved | |
| Atlantic Metaclad Limited | — | 671955 | — | Active | |
| Atlantic Metal Recycling | — | 654520 | — | Dissolved | |
| Atlantic Metal Working Association | — | 658775 | — | Dissolved | |
| Atlantic Microclimate Intelligence Inc. | — | 744972 | — | Pending | |
| Atlantic Millennium Star Inc. | — | 647969 | — | Dissolved | |
| Atlantic Millwork | — | 676795 | — | Active | |
| Atlantic Mini Homes Ltd. | — | 733949 | — | Active | |
| Atlantic Mist Cranberries Inc. | — | 629860 | — | Merged | |
| Atlantic Mist Cranberries Inc. | — | 726071 | — | Dissolved | |
| Atlantic MoTech Inc. | — | 631918 | — | Dissolved | |
| Atlantic Mobile Air Repair | — | 685947 | — | Dissolved | |
| Atlantic Mobile Tire NB | — | 721534 | — | Pending | |
| Atlantic Mobile Tire NB Inc. | — | 722141 | — | Active | |
| Atlantic Mobile Tuning | — | 762231 | — | Active | |
| Atlantic Mobility Products | — | 629345 | — | Dissolved | |
| Atlantic Mobility Products Limited | — | 629211 | — | Dissolved | |
| Atlantic Mobility Products, Limited Partnership | — | 629344 | — | Active | |
| Atlantic Modern Homes | — | 766376 | — | Active | |
| Atlantic Motel Moncton | — | 709534 | — | Dissolved | |
| Atlantic Motion Systems Limited | — | 760753 | — | Active | |
| Atlantic Moto Skills Ltd./Ltee. | — | 685533 | — | Active | |
| Atlantic Motorcycle Apparel | — | 638016 | — | Dissolved | |
| Atlantic Movers NB | — | 735360 | — | Dissolved | |
| Atlantic Mystic Soul Care and Emporium | — | 709074 | — | Dissolved | |
| Atlantic N&T Food Inc. | — | 769804 | — | Active | |
| Atlantic NDT | — | 610503 | — | Active | |
| Atlantic NDT Inc. | — | 508128 | — | Merged | |
| Atlantic NG Supply Limited Partnership | — | 675483 | — | Dissolved | |
| Atlantic NLP | — | 665730 | — | Dissolved | |
| Atlantic Nanotek Inc. | — | 690684 | — | Dissolved | |
| Atlantic Nationals Automotive Extravaganza Ltd. | — | 617424 | — | Active | |
| Atlantic Needleless Supplies | — | 760564 | — | Active | |
| Atlantic Network Solutions Inc. | — | 510551 | — | Withdrawn | |
| Atlantic Neuropsychological Services | — | 349725 | — | Dissolved | |
| Atlantic Newspaper Group ULC | — | 77431 | — | Merged | |
| Atlantic NoctaSleep | — | 759784 | — | Active | |
| Atlantic Ocean Festive de l'Atlantique Inc. | — | 700662 | — | Dissolved | |
| Atlantic Ocean Gifts Ltd. | — | 727208 | — | Dissolved | |
| Atlantic Off-Road Adventures | — | 776482 | — | Active | |
| Atlantic Oil Equipment Development Inc | — | 630492 | — | Dissolved | |
| Atlantic Ontario Transport | — | 775808 | — | Active | |
| Atlantic Oriental Rugs Ltd. | — | 670502 | — | Dissolved | |
| Atlantic Osprey Limited Partnership | — | 400593 | — | Active | |
| Atlantic Osprey Shipping Limited | — | 514821 | — | Active | |
| Atlantic Outdoor Adventures.com | — | 622247 | — | Dissolved | |
| Atlantic Outdoor Power Equipment | — | 685699 | — | Dissolved | |
| Atlantic Overseas Development | — | 609066 | — | Dissolved | |
| Atlantic Owl (PAS) Limited Partnership | — | 676270 | — | Active | |
| Atlantic Owl (PAS) Shipping Limited | — | 676224 | — | Active | |
| Atlantic P3 Ltd. | — | 641634 | — | Dissolved | |
| Atlantic PC Builds Inc. | — | 715751 | — | Dissolved | |
| Atlantic Paddle | — | 755990 | — | Active | |
| Atlantic Paddle Ltd. | — | 744747 | — | Dissolved | |
| Atlantic Paintball Adventure | — | 619615 | — | Dissolved | |
| Atlantic Paintball Gear Wholesalers | — | 618225 | — | Dissolved | |
| Atlantic Paintball League (APBL) | — | 636401 | — | Dissolved | |
| Atlantic Pallet Racking & Installations | — | 652626 | — | Dissolved | |
| Atlantic Paramedic Academy Academie Paramedicale de L'Atlantique | — | 642500 | — | Dissolved | |
| Atlantic Parking Lines | — | 674023 | — | Dissolved | |
| Atlantic Partners Financial | — | 608619 | — | Dissolved | |
| Atlantic Parts Warehouse Inc. | — | 602046 | — | Dissolved | |
| Atlantic Peak Enterprises Inc. | — | 775672 | — | Active | |
| Atlantic Peoples Housing | — | 642628 | — | Dissolved | |
| Atlantic Peoples Housing | — | 609626 | — | Dissolved | |
| Atlantic Performance & Leisure | — | 638358 | — | Dissolved | |
| Atlantic Performance & Leisure | — | 743302 | — | Active | |
| Atlantic Performance Improvement Institute Inc. | — | 508068 | — | Dissolved | |
| Atlantic Persian Rugs Inc. | — | 646331 | — | Dissolved | |
| Atlantic Perspectives Business Intelligent Solution | — | 606735 | — | Dissolved | |
| Atlantic Pet Distributing | — | 720176 | — | Active | |
| Atlantic Pet Grooming | — | 617015 | — | Dissolved | |
| Atlantic Pet Nutrition | — | 650032 | — | Dissolved | |
| Atlantic Pete Truck & Trailer Ltd. | — | 704359 | — | Dissolved | |
| Atlantic Petroleum Training College (N.S.) Limited | — | 631435 | — | Dissolved | |
| Atlantic Pets Canada by Holly | — | 720413 | — | Active | |
| Atlantic Pewter | — | 743066 | — | Active | |
| Atlantic Photo Booth Rentals Incorporated | — | 710759 | — | Active | |
| Atlantic Pier Systems | — | 622966 | — | Dissolved | |
| Atlantic Pinnacle Advisory Inc. | — | 671982 | — | Active | |
| Atlantic Pipe Savers Inc. | — | 725793 | — | Active | |
| Atlantic Pipeline Supply | — | 345395 | — | Dissolved | |
| Atlantic Piping Distribution NB Ltd. | — | 772985 | — | Active | |
| Atlantic Piping Distribution NB Ltd. | — | 735436 | — | Merged | |
| Atlantic Pizza & Juice Harbour | — | 772042 | — | Active | |
| Atlantic Placemat Advertising | — | 352025 | — | Dissolved | |
| Atlantic Platinum Resources | — | 675905 | — | Dissolved | |
| Atlantic Playgrounds & Supply | — | 771496 | — | Active | |
| Atlantic Pocket | — | 637935 | — | Dissolved | |
| Atlantic Pocket Inc. | — | 661225 | — | Active | |
| Atlantic Pond Supply | — | 693621 | — | Dissolved | |
| Atlantic Pool Supplies | — | 743810 | — | Active | |
| Atlantic Portable Boats | — | 346087 | — | Dissolved | |
| Atlantic Post and Beam Holding Ltd | — | 659150 | — | Dissolved | |
| Atlantic Potash Corporation | — | 654666 | — | Active | |
| Atlantic Potash Millstream Corporation | — | 679458 | — | Active | |
| Atlantic Pottery | — | 699901 | — | Active | |
| Atlantic Powder Coating | — | 350702 | — | Dissolved | |
| Atlantic Power Booster | — | 635334 | — | Dissolved | |
| Atlantic Power GP Inc. | — | 638506 | — | Dissolved | |
| Atlantic Power Limited Partnership | — | 400447 | — | Dissolved | |
| Atlantic Powertrain Sales & Service | — | 657683 | — | Active | |
| Atlantic Precision Group | — | 600356 | — | Dissolved | |
| Atlantic Precision Gutters Inc. | — | 647997 | — | Dissolved | |
| Atlantic Preferred Seafood Inc. | — | 664599 | — | Dissolved | |
| Atlantic Premium Furniture Inc. | — | 683286 | — | Active | |
| Atlantic Pressure Wash | — | 351567 | — | Dissolved | |