| Doreen Mallory Trucking & Sons | — | 635540 | — | Dissolved | |
| Dorey Behavioural Services | — | 714562 | — | Dissolved | |
| Dorey Behavioural Services Inc. | — | 729196 | — | Active | |
| Dorey Ventures Limited | — | 621538 | — | Dissolved | |
| Doric Carpentry Ltd. | — | 725385 | — | Active | |
| Dorina & Ronald Enterprises Inc. | — | 501936 | — | Dissolved | |
| Dorina pedi-soins plus | — | 691138 | — | Active | |
| Doris Jardine Counselling | — | 618469 | — | Dissolved | |
| Doris Martin Service Station | — | 643465 | — | Dissolved | |
| Doris' Cleaning | — | 720897 | — | Pending | |
| Dorisco Holdings Ltd. | — | 716978 | — | Active | |
| Dorman Electric Ltd. | — | 633206 | — | Dissolved | |
| Dorman's Photography | — | 680302 | — | Dissolved | |
| DormerPramet Canada | — | 686099 | — | Active | |
| Dorothy Swaikoski Travel | — | 648716 | — | Dissolved | |
| Dort Distribution Inc. | — | 723295 | — | Dissolved | |
| Dort Financial Planning Services | — | 604676 | — | Dissolved | |
| Dos Group Inc. | — | 666123 | — | Dissolved | |
| Dos Toros Taqueria | — | 752459 | — | Active | |
| Dos Toros Taqueria Inc. | — | 726922 | — | Active | |
| Dosirak Korean Food | — | 745927 | — | Active | |
| Dosirak Korean Food | — | 653690 | — | Dissolved | |
| Doskas Media House | — | 779675 | — | Active | |
| Doskas Paintball Supply | — | 608030 | — | Dissolved | |
| Dot & Spire Jewelry | — | 717479 | — | Dissolved | |
| Dot 10 Services | — | 632490 | — | Dissolved | |
| Dots NB - for Kids' Mental Health Inc. | — | 659251 | — | Dissolved | |
| Dottie's Garden | — | 777174 | — | Active | |
| Dou Rod & Gun | — | 624526 | — | Dissolved | |
| Dou Sylviculture | — | 346673 | — | Dissolved | |
| Double "C" Contracting Inc. | — | 49376 | — | Dissolved | |
| Double "H" Special Care Home Inc. | — | 672758 | — | Active | |
| Double A Commercial Cleaning Services | — | 753405 | — | Active | |
| Double A Cooking Systems | — | 760145 | — | Active | |
| Double A Kennels | — | 613148 | — | Dissolved | |
| Double A Videos | — | 620865 | — | Dissolved | |
| Double B Plumbing & Heating Ltd. | — | 670816 | — | Dissolved | |
| Double Barn Ranch Inc. | — | 617000 | — | Dissolved | |
| Double Barrel Entertainment Inc. | — | 626224 | — | Dissolved | |
| Double Blossoms Daycare Inc. | — | 711867 | — | Active | |
| Double C Bookkeeping & Tax Services | — | 628769 | — | Dissolved | |
| Double C Courier | — | 628768 | — | Dissolved | |
| Double Check Handyman | — | 698820 | — | Active | |
| Double Check Publishing | — | 770981 | — | Active | |
| Double Cuba Libre Short Glass Inc. | — | 750631 | — | Active | |
| Double D Variety | — | 677253 | — | Dissolved | |
| Double Dan Construction Ltd. | — | 670054 | — | Dissolved | |
| Double Deuce Night Club Inc. | — | 609591 | — | Dissolved | |
| Double Diamond Fisheries Ltd. | — | 699271 | — | Active | |
| Double Diamond Management Ltd. | — | 623831 | — | Dissolved | |
| Double Doubles Coffee & Variety | — | 648738 | — | Dissolved | |
| Double Dutch Construction Inc. | — | 645338 | — | Dissolved | |
| Double Dwell Properties Ltd. | — | 751369 | — | Active | |
| Double E Towing & Salvage Inc. | — | 718430 | — | Dissolved | |
| Double Eagle Promotions | — | 671740 | — | Dissolved | |
| Double G Auto | — | 604425 | — | Dissolved | |
| Double G Auto | — | 603104 | — | Dissolved | |
| Double Impact Property Management | — | 673595 | — | Dissolved | |
| Double J Construction Inc. | — | 766501 | — | Active | |
| Double J Excavation | — | 741283 | — | Active | |
| Double L Enterprises Inc. | — | 604743 | — | Dissolved | |
| Double L Horse Haven Stables | — | 610954 | — | Dissolved | |
| Double L Productions | — | 662947 | — | Dissolved | |
| Double O Fish Farm Limited | — | 607577 | — | Merged | |
| Double R Menuisier | — | 351892 | — | Dissolved | |
| Double R. Ranch | — | 645778 | — | Dissolved | |
| Double R. Retreat | — | 353032 | — | Dissolved | |
| Double Star Energy Canada Corp. | — | 513310 | — | Dissolved | |
| Double Tides Plant Products | — | 714889 | — | Dissolved | |
| Double Tides Woodworks | — | 715467 | — | Active | |
| Double Time Duds | — | 627357 | — | Dissolved | |
| Double Trouble Farm Ltd. | — | 759724 | — | Pending | |
| Double V Solutions | — | 693543 | — | Dissolved | |
| DoubleA Consulting Inc. | — | 713766 | — | Dissolved | |
| DoublePort Inc. | — | 512587 | — | Dissolved | |
| Doublebuck Lodge | — | 757455 | — | Active | |
| Doublebuck Lodge | — | 709304 | — | Dissolved | |
| Doubletake Motorsports | — | 608994 | — | Dissolved | |
| Douce Clinic Inc. | — | 775611 | — | Active | |
| Douce Plénitude, Centre d'éveil et de soins holistiques | — | 718783 | — | Dissolved | |
| Doucet Appliance Plus Inc./ Doucet Electroménager Plus Inc. | — | 660406 | — | Active | |
| Doucet Auto Repair | — | 710485 | — | Dissolved | |
| Doucet Building Services | — | 624714 | — | Dissolved | |
| Doucet Building Services | — | 614244 | — | Dissolved | |
| Doucet Construction Renovation | — | 757938 | — | Active | |
| Doucet Engineering | — | 345799 | — | Dissolved | |
| Doucet Evergreen Ltd | — | 630899 | — | Active | |
| Doucet Foresterie Inc. | — | 652246 | — | Active | |
| Doucet Jewelers/Bijoutiers | — | 603533 | — | Dissolved | |
| Doucet Small Engine Repair | — | 649151 | — | Dissolved | |
| Doucet Sports and Cycle Repair Shop | — | 621663 | — | Dissolved | |
| Doucet Travel | — | 624973 | — | Dissolved | |
| Doucet's Custom Draperies | — | 637042 | — | Dissolved | |
| Doucet's Enhancing Auto Parts | — | 345568 | — | Dissolved | |
| Doucet's Take Out | — | 349555 | — | Dissolved | |
| Doucette Holdings Inc. | — | 660966 | — | Dissolved | |
| Doucette Lobster Bros. Inc. | — | 705424 | — | Active | |
| Doucette’s Car Care | — | 739029 | — | Active | |
| Douceur de Nuit - Carrefour Assomption | — | 669727 | — | Dissolved | |
| Doug Demmings P.C. Inc. | — | 646402 | — | Merged | |
| Doug Desruisseau Carpentry Inc. | — | 669305 | — | Dissolved | |
| Doug Drealer Supply Shop | — | 747161 | — | Active | |
| Doug Epton & The Sound Experts | — | 344897 | — | Dissolved | |
| Doug Geldart Trucking | — | 631942 | — | Dissolved | |
| Doug Geldart Trucking LTD. | — | 663951 | — | Dissolved | |
| Doug Hanson Photography | — | 662858 | — | Dissolved | |
| Doug Hudson Trucking (2022) Ltd. | — | 734986 | — | Pending | |
| Doug Lowe Referral Agency | — | 626563 | — | Dissolved | |
| Doug Miller, General Maintenance | — | 351018 | — | Dissolved | |
| Doug Moffett Welding Ltd. | — | 677197 | — | Active | |
| Doug Pearson Auto | — | 665270 | — | Active | |
| Doug Rigaux Cabinet Maker | — | 347313 | — | Dissolved | |
| Doug Stewart Financial Services Ltd. | — | 649786 | — | Active | |
| Doug Taylor Trucking | — | 642983 | — | Dissolved | |
| Doug Taylor Trucking | — | 721668 | — | Dissolved | |
| Doug Taylor Trucking & Construction Inc. | — | 729870 | — | Active | |
| Doug's Recreation Ltd. | — | 667063 | — | Active | |
| Doug, A Real Good Painter | — | 612920 | — | Dissolved | |
| Dougcorp Holdings Inc. | — | 765021 | — | Active | |
| Dough Delight | — | 602706 | — | Dissolved | |
| Dough Joe’s edible cookie dough | — | 746300 | — | Active | |
| Dougherty Property Holdings Ltd. | — | 648221 | — | Active | |
| Dougherty Steel Stud & Drywall Ltd. | — | 680401 | — | Active | |
| Dougie Breau Memorial Fund | — | 344988 | — | Dissolved | |
| Douglas Albert Mills Enterprises | — | 346273 | — | Dissolved | |
| Douglas Animal Hospital | — | 740337 | — | Active | |
| Douglas Ave. Children's Center | — | 689557 | — | Dissolved | |
| Douglas Ave. Children's Center Inc. | — | 650471 | — | Merged | |
| Douglas Creelman Holdings Ltd. | — | 672001 | — | Active | |
| Douglas Demmings Professional Corporation (2021) Ltd. | — | 726675 | — | Active | |
| Douglas Diner | — | 618936 | — | Dissolved | |
| Douglas E. Steeves & Associates Limited | — | 743098 | — | Merged | |
| Douglas Forestry Consultants | — | 350813 | — | Dissolved | |
| Douglas G. Motty Consulting | — | 706814 | — | Active | |
| Douglas Harbour Community Center Inc. | — | 642484 | — | Active | |
| Douglas Harbour Contracting Ltd. | — | 631073 | — | Active | |
| Douglas Harbour Early Learning Inc. | — | 757333 | — | Active | |
| Douglas Harbour Emergency Services Incorporated | — | 693710 | — | Active | |
| Douglas Investments Ltd. | — | 711571 | — | Active | |
| Douglas Laboratories Canada | — | 692010 | — | Active | |
| Douglas Mantin Contractors Ltd. | — | 667086 | — | Dissolved | |
| Douglas Paul's Fredericton Auto Spa | — | 659891 | — | Dissolved | |
| Douglas R. Seely Management Services | — | 603017 | — | Dissolved | |
| Douglas Special Care Home | — | 743591 | — | Active | |
| Douglas Valley Excavation Ltd. | — | 644122 | — | Dissolved | |
| Douglasfield Forestry & Custom Lumber | — | 616626 | — | Dissolved | |
| Douglass Properties Ltd. | — | 507340 | — | Dissolved | |
| Douglastown Foods Inc. | — | 625656 | — | Active | |
| Douglastown Taxi | — | 622026 | — | Dissolved | |
| Doum Levesque Logging | — | 673707 | — | Active | |
| Douro Solar Park 1 GP Inc. | — | 654305 | — | Dissolved | |
| Douro Solar Park 2 GP Inc. | — | 654306 | — | Dissolved | |
| Doussot Marketing | — | 732407 | — | Active | |
| Douthwright Holdings Ltd. | — | 512084 | — | Active | |
| Doux Bébé Shop | — | 771737 | — | Active | |
| Dove Creek Limited Partnership | — | 704946 | — | Active | |
| Dove Productions | — | 688105 | — | Dissolved | |
| Dove Signature Realty Inc. | — | 771000 | — | Active | |
| Dove Technologies, Inc. | — | 758554 | — | Pending | |
| Dove's Gardening | — | 741329 | — | Active | |
| Dover Canada Finance LP | — | 608571 | — | Dissolved | |
| Dover Convenience | — | 702348 | — | Active | |
| Dover Fish Hatchery Ltd. | — | 709294 | — | Merged | |
| Dover Realty Inc. | — | 34828 | — | Dissolved | |
| Dover Tire & Boosting | — | 695432 | — | Dissolved | |
| Dover Truck Detailing | — | 635077 | — | Dissolved | |
| Dover-Foxcroft Consulting Limited | — | 672029 | — | Dissolved | |
| Dovico Software Inc | — | 54349 | — | Active | |
| Dovy's Falafel Inc. | — | 776460 | — | Active | |
| Dow & Associates | — | 617570 | — | Dissolved | |
| Dow Chemical Canada Inc. | — | 617385 | — | Inactive | |
| Dow Chemical Canada Inc. | — | 78044 | — | Merged | |
| Dow Phillips Sand | — | 347727 | — | Dissolved | |
| Dow Phillips Sand | — | 347751 | — | Dissolved | |
| Dow Quality Health Care Inc. | — | 686829 | — | Active | |
| Dow's Special Care Home | — | 615896 | — | Dissolved | |
| Dow's Special Care Home | — | 679442 | — | Dissolved | |
| Dowd Cladding & Metals Ltd. | — | 602739 | — | Dissolved | |
| Dowd Roofing Inc. | — | 629109 | — | Active | |
| Dowling Enterprise | — | 726804 | — | Dissolved | |
| Dowling Enterprise Inc. | — | 774884 | — | Active | |
| Dowling's Plumbing Ltd. | — | 515831 | — | Dissolved | |
| Down By The Bay Custom Creations | — | 723266 | — | Pending | |
| Down Country Electrical | — | 679735 | — | Dissolved | |
| Down East Auto Liquidators (2018) Inc. | — | 705490 | — | Active | |
| Down East Auto Liquidators Inc. | — | 508904 | — | Dissolved | |
| Down East Automotive Sales Ltd. | — | 47356 | — | Dissolved | |
| Down East Candy & Co. | — | 669829 | — | Dissolved | |
| Down East Carpentry | — | 705606 | — | Active | |
| Down East Clean Water | — | 741776 | — | Dissolved | |
| Down East Clean Water | — | 752861 | — | Active | |
| Down East Clean Water Inc. | — | 672225 | — | Dissolved | |
| Down East Coffee (Moncton) Limited | — | 648816 | — | Dissolved | |
| Down East Collectibles | — | 348559 | — | Dissolved | |
| Down East Comfort Ltd. | — | 714287 | — | Active | |
| Down East Electric | — | 702001 | — | Dissolved | |
| Down East Electrical | — | 625206 | — | Dissolved | |
| Down East Electrical Inc. | — | 628618 | — | Dissolved | |
| Down East Fence Ltd. | — | 613025 | — | Dissolved | |
| Down East Investigations and Security Inc. | — | 652768 | — | Dissolved | |