| Mill Creek Woodworking Ltd. | — | 608502 | — | Dissolved | |
| Mill Creek Woodworks Ltd. | — | 608501 | — | Dissolved | |
| Mill Energy Electrical Contracting Ltd. | — | 776258 | — | Active | |
| Mill House Bed & Breakfast | — | 349614 | — | Dissolved | |
| Mill House Investments Limited | — | 711976 | — | Active | |
| Mill Lake Farm Ltd. | — | 757696 | — | Active | |
| Mill Pond Holdings Inc. | — | 606591 | — | Dissolved | |
| Mill Service Enterprises Ltd. | — | 612097 | — | Dissolved | |
| Mill Stone Place | — | 706026 | — | Active | |
| Mill Street Designs | — | 733727 | — | Active | |
| Mill Town Cycle Café Inc. | — | 725863 | — | Active | |
| Mill Town Roasters | — | 708451 | — | Active | |
| Mill-Tek Office Solutions | — | 351140 | — | Dissolved | |
| MillPort Trucking Ltd. | — | 676362 | — | Active | |
| Millan Lumber Inc. | — | 736996 | — | Active | |
| Millar Private | — | 772088 | — | Active | |
| Millar Private Wealth | — | 772089 | — | Active | |
| Millbrook Group Inc. | — | 512041 | — | Dissolved | |
| Millcraft Cabinets Inc. | — | 645788 | — | Active | |
| Millcraft Renovations | — | 744331 | — | Active | |
| Milled Rite Lumber | — | 615618 | — | Dissolved | |
| Millenaire Homes Ltd. | — | 666320 | — | Active | |
| Millenia Farms | — | 348610 | — | Dissolved | |
| Millenium 2000 Bowl | — | 350503 | — | Dissolved | |
| Millenium Auto Body and Collision | — | 603359 | — | Dissolved | |
| Millenium Interactive | — | 346108 | — | Dissolved | |
| Millenium Landscaping | — | 634228 | — | Dissolved | |
| Millenium Nails | — | 619432 | — | Dissolved | |
| Millennia Fresh Leaf Company Ltd. | — | 695683 | — | Dissolved | |
| Millennia Tea | — | 688558 | — | Dissolved | |
| Millennia Tea Incorporated | — | 689595 | — | Active | |
| Millennium Asset Management Group Ltd. | — | 602263 | — | Dissolved | |
| Millennium Bridal Couture & Gowns Ltd. | — | 628586 | — | Dissolved | |
| Millennium Computers Inc. | — | 512199 | — | Dissolved | |
| Millennium Education Inc. | — | 699375 | — | Dissolved | |
| Millennium Fiberglass Inc | — | 644449 | — | Dissolved | |
| Millennium Import LLC | — | 611897 | — | Dissolved | |
| Millennium Local Fine Art | — | 699374 | — | Pending | |
| Millennium Marine | — | 778187 | — | Active | |
| Millennium Marine Inc. | — | 673739 | — | Dissolved | |
| Millennium Marine Inc. | — | 42162 | — | Merged | |
| Millennium Market | — | 666041 | — | Dissolved | |
| Millennium Medical Centre | — | 691328 | — | Active | |
| Millennium Mist | — | 646349 | — | Dissolved | |
| Millennium Mist Sprint Water | — | 350530 | — | Dissolved | |
| Millennium Pool & Leisure | — | 654731 | — | Active | |
| Millennium Signs | — | 676230 | — | Active | |
| Millennium Tire Inc. | — | 511023 | — | Dissolved | |
| Millennium Welding | — | 664975 | — | Active | |
| Miller Building Company Ltd. | — | 751635 | — | Active | |
| Miller Carmichael Properties Inc. Les Immeubles Miller Carmichael Inc. | — | 666808 | — | Active | |
| Miller Custom Cabinets | — | 744129 | — | Dissolved | |
| Miller Custom Cabinets Ltd. | — | 745620 | — | Active | |
| Miller Fabrication and Repair | — | 773564 | — | Active | |
| Miller Gang Fisheries Ltd. | — | 778030 | — | Active | |
| Miller Heating and Cooling Inc. | — | 718833 | — | Active | |
| Miller Heiman Group Canada | — | 698349 | — | Dissolved | |
| Miller Infrastructures Limited | — | 76380 | — | Merged | |
| Miller Kitchens Ltd. | — | 780249 | — | Active | |
| Miller Paving Limited | — | 641493 | — | Merged | |
| Miller Pond Retreat | — | 689677 | — | Active | |
| Miller Rail Surplus Services | — | 617845 | — | Dissolved | |
| Miller Tire Services (N.B.) Limited | — | 509129 | — | Dissolved | |
| Miller's Appliance Centre | — | 346390 | — | Dissolved | |
| Miller's Kettle Corn | — | 710916 | — | Dissolved | |
| Millers Prime Baits Bear Hunting | — | 697583 | — | Dissolved | |
| Millers Prime Baits Bear Hunting | — | 769461 | — | Active | |
| Millerton Recreation Council Inc. | — | 646113 | — | Active | |
| Millertyme Racing Inc. | — | 697400 | — | Active | |
| Millfield Management | — | 656442 | — | Dissolved | |
| Millfield Management Ltd. | — | 659221 | — | Active | |
| Millhouse Properties Inc. | — | 647336 | — | Dissolved | |
| Millican Realty and Forestry Services Ltd. | — | 721900 | — | Active | |
| Millidge Avenue Tot Spot Childcare | — | 600916 | — | Active | |
| Millidge Place Massage Therapy | — | 660928 | — | Dissolved | |
| Millidgeville Contraception and Sexual Health Clinic (CaSH) | — | 678295 | — | Dissolved | |
| Millidgeville Convenience | — | 774036 | — | Active | |
| Millidgeville Family Practice | — | 680202 | — | Pending | |
| Millidgeville Medical Clinic | — | 671450 | — | Active | |
| Millie Haz Your Style | — | 635002 | — | Dissolved | |
| Millie P Photography | — | 681284 | — | Active | |
| Millier's Plumbing | — | 779102 | — | Active | |
| Milligan Holdings | — | 710244 | — | Dissolved | |
| Milligan's Cycle | — | 345006 | — | Dissolved | |
| Milliken Design, Inc. | — | 76716 | — | Active | |
| Million Deliveries Atlantic Inc. | — | 720759 | — | Dissolved | |
| Million Deliveries Inc. | — | 765392 | — | Active | |
| Millionhairs Mobile Salon | — | 652863 | — | Dissolved | |
| Millman Insurance Limited | — | 77691 | — | Dissolved | |
| Millridge Sales & Service Limited | — | 627449 | — | Dissolved | |
| Mills | — | 650927 | — | Active | |
| Mills Aquaculture Inc. | — | 686743 | — | Active | |
| Mills Aquaculture Inc. | — | 508429 | — | Merged | |
| Mills Cormier Window Cleaning and Painting | — | 621709 | — | Dissolved | |
| Mills Engineering & Consulting Inc. | — | 728285 | — | Active | |
| Mills Financial Services | — | 353403 | — | Dissolved | |
| Mills Outdoor Solutions | — | 770895 | — | Active | |
| Mills Paints | — | 650928 | — | Active | |
| Mills Sea Food | — | 688949 | — | Dissolved | |
| Millside Residence - John A. Humphrey House Inc. | — | 632242 | — | Active | |
| Millstone Artist Residence Incorporated | — | 618882 | — | Dissolved | |
| Millstream Accounting Services | — | 716407 | — | Dissolved | |
| Millstream Ag Sales and Repairs | — | 697096 | — | Active | |
| Millstream Construction Inc. | — | 754215 | — | Active | |
| Millstream Dairy Inc. | — | 735327 | — | Active | |
| Millstream Environmental Ltd. | — | 713838 | — | Active | |
| Millstream Heritage Holdings Inc. | — | 771537 | — | Active | |
| Millstream Iron and Metal | — | 667198 | — | Dissolved | |
| Millstream Ventures Inc. | — | 760095 | — | Active | |
| Milltown Properties Inc. | — | 728477 | — | Active | |
| Millville Construction Management Limited | — | 695829 | — | Dissolved | |
| Millville Instruction & Consulting | — | 698851 | — | Active | |
| Millville Nackawic Baptist Church Inc. | — | 655583 | — | Active | |
| Millville Youth Recreation Centre Inc. | — | 25293 | — | Dissolved | |
| Milne Medical Professional Corporation | — | 634161 | — | Active | |
| Milneco | — | 775373 | — | Active | |
| Milner Executive Incorporated | — | 510158 | — | Dissolved | |
| Milner Memorial Gardens Inc. | — | 603721 | — | Active | |
| Milo & Max Entertainment | — | 723422 | — | Pending | |
| Milo Holdings Ltd. | — | 640557 | — | Active | |
| Milo Saunders Renovations | — | 768792 | — | Active | |
| Milo's Pet Shop Inc. | — | 768421 | — | Active | |
| Milo's Pizza | — | 755867 | — | Active | |
| Milonium Design | — | 675913 | — | Dissolved | |
| Milou Zazou by Emilie | — | 700249 | — | Active | |
| Miltech Consulting | — | 347775 | — | Dissolved | |
| Milton Custom Cabinets Inc. | — | 637571 | — | Active | |
| Milton Properties, Ltd. | — | 57368 | — | Active | |
| Milwaukee Tool | — | 681986 | — | Active | |
| Mily Mathi Inc. | — | 666466 | — | Dissolved | |
| Mim's Thermal Studio Inc. | — | 779177 | — | Active | |
| Mimi & Lily Shop | — | 779552 | — | Active | |
| Mimi & Papa's Gas & Convenience Ltd. | — | 744922 | — | Dissolved | |
| Mimi Hebert Enterprises Ltd. | — | 513243 | — | Dissolved | |
| Mimi Medical Spa | — | 769981 | — | Dissolved | |
| Mimi Medical Spa Inc. | — | 779709 | — | Active | |
| Mimi's Smoothies | — | 719248 | — | Pending | |
| Mimic Woodsmith Ltd. | — | 703840 | — | Dissolved | |
| Mimiges Wellness Spa | — | 737272 | — | Active | |
| Mimimi Restaurant Inc. | — | 695241 | — | Active | |
| Mimo Pearl Jewelry | — | 766070 | — | Active | |
| Mimra Digital Solutions | — | 745413 | — | Active | |
| Mimziz Inc. | — | 699482 | — | Active | |
| Minaca Holdings LP | — | 737671 | — | Active | |
| Mind 2 Business Marketing | — | 613563 | — | Dissolved | |
| Mind Body Nourish Wellness | — | 764874 | — | Active | |
| Mind Burst Marketing | — | 655496 | — | Dissolved | |
| Mind Full Elements Counselling | — | 725419 | — | Active | |
| Mind Full of Food | — | 676211 | — | Active | |
| Mind Hive Creations Inc. | — | 719822 | — | Dissolved | |
| Mind Matters- Performance Enhancement Consultants | — | 657946 | — | Active | |
| Mind Over Matter Occupational Therapy | — | 732782 | — | Active | |
| Mind Over Money - Money Coaching | — | 675287 | — | Dissolved | |
| Mind Palace Solutions Wargaming and Training | — | 744472 | — | Active | |
| Mind Power Renovation Inc. | — | 771841 | — | Active | |
| Mind Shift Clinic | — | 680532 | — | Dissolved | |
| Mind at Peace Centre Mieux-Être | — | 702164 | — | Active | |
| Mind at Peace Healing | — | 676815 | — | Dissolved | |
| Mind to Heart Box | — | 727541 | — | Active | |
| Mind's i Photography | — | 685835 | — | Dissolved | |
| Mind, Body Remedy Massage Therapy | — | 624597 | — | Dissolved | |
| MindFarm Apps Inc. | — | 677815 | — | Dissolved | |
| MindSense | — | 766500 | — | Active | |
| MindSense - Centre of Psychiatry | — | 766502 | — | Active | |
| MindSense Canada | — | 768018 | — | Active | |
| MindWave Global Corp. | — | 670572 | — | Dissolved | |
| Mindfit Training | — | 698660 | — | Active | |
| Mindful Balance Wellness Inc. | — | 776490 | — | Active | |
| Mindful Breath | — | 673444 | — | Dissolved | |
| Mindful Designs MJM | — | 762587 | — | Active | |
| Mindful Plate Coaching | — | 778838 | — | Active | |
| Mindful Vibe | — | 676442 | — | Active | |
| MindfulNest Psychology | — | 770466 | — | Active | |
| Mindfull Mode Inc. | — | 725412 | — | Active | |
| Mindfulness and Meditation With Anneke | — | 751199 | — | Active | |
| Mindfulness consultation Pleine conscience | — | 698634 | — | Dissolved | |
| Mindfulness consultation Pleine conscience Inc. | — | 706999 | — | Active | |
| Mindfuse Management Solutions Inc. | — | 729850 | — | Active | |
| Minding-The-Gap Consultants Inc. | — | 626392 | — | Active | |
| Mindlance Consulting, Inc. | — | 677323 | — | Active | |
| Minds Eye Technical Services | — | 350927 | — | Dissolved | |
| Minds in Motion Pilates | — | 651163 | — | Active | |
| Mindsbridge Corporation | — | 609259 | — | Dissolved | |
| Mindsbridge Design Corp. | — | 692839 | — | Pending | |
| Mindset Money and More Media | — | 753855 | — | Active | |
| Mindseye Productions | — | 693640 | — | Active | |
| Mindstems Media | — | 633691 | — | Dissolved | |
| Mindtop Innovations Inc. | — | 689038 | — | Active | |
| Mindwise Nurse Education & Consulting | — | 771708 | — | Active | |
| Mindy Bouchard Occupational Therapy | — | 722978 | — | Pending | |
| Mindy Foster Hanson- Love Your Space | — | 698738 | — | Active | |
| Mindz-Eye Hypnosis | — | 696559 | — | Dissolved | |
| Mine Closure Management Inc. | — | 746308 | — | Active | |
| Mine Reclamation Inc. | — | 11854 | — | Merged | |
| Mine Ridge Maples Production | — | 763911 | — | Active | |
| Mine Safety Appliances Company, LLC | — | 678339 | — | Dissolved | |
| Mine Trans Ltd. | — | 684786 | — | Active | |
| Miner's Plumbing | — | 657537 | — | Dissolved | |
| Mineral Farms Ltd | — | 601319 | — | Merged | |
| Minerva Media Brand Communications | — | 633903 | — | Dissolved | |