| Bistro Le Chat Bleu | — | 680494 | — | Dissolved | |
| Bistro Le Chat Bleu Inc. | — | 709957 | — | Active | |
| Bistro Le Moque-Tortue | — | 716936 | — | Dissolved | |
| Bistro Le Petit Paris | — | 746589 | — | Active | |
| Bistro Lorentz Inc. | — | 777128 | — | Active | |
| Bistro Nutrio To Go | — | 644192 | — | Dissolved | |
| Bistro Pub Nid du Héron Inc. | — | 666792 | — | Dissolved | |
| Bistro Rosoi Inc. | — | 733465 | — | Pending | |
| Bistro Thirty-Three Inc. | — | 649078 | — | Dissolved | |
| Bistro de Paris Inc. | — | 662331 | — | Dissolved | |
| Bistro du centre | — | 750724 | — | Active | |
| Bistro et Café André | — | 348095 | — | Dissolved | |
| Bistro et Café André | — | 612783 | — | Dissolved | |
| Bistro l'Artishow | — | 632923 | — | Dissolved | |
| Bistro ludique LE MOQUE-TORTUE Games Bistro | — | 702735 | — | Dissolved | |
| Bistro33@Home Inc. | — | 700214 | — | Dissolved | |
| BitBrunswick Mining Inc. | — | 727376 | — | Active | |
| BitCycle Inc. | — | 673703 | — | Active | |
| BitPay Inc. | — | 670965 | — | Active | |
| Bitar Groceries Ltd. | — | 714002 | — | Pending | |
| Bitbuy | — | 757475 | — | Active | |
| Bitbuy Technologies Inc. | — | 726529 | — | Dissolved | |
| Bitcoin NewBrunswick | — | 697638 | — | Dissolved | |
| Bite & Smile Crepes | — | 773254 | — | Active | |
| BiteBack Foods | — | 775737 | — | Active | |
| Bitflot Technologies Inc. | — | 773065 | — | Active | |
| Bitfox Games | — | 700225 | — | Dissolved | |
| Bitfox Games Inc. | — | 709340 | — | Dissolved | |
| Bits and PC | — | 604174 | — | Dissolved | |
| BitsPerInch | — | 601101 | — | Dissolved | |
| Bittaford Consulting Inc. | — | 704181 | — | Dissolved | |
| BitterSweet Desserterie & Bar Ltd. | — | 769404 | — | Active | |
| BitterSweets' | — | 623726 | — | Dissolved | |
| Bitzon Technologies Inc. | — | 703045 | — | Dissolved | |
| Biway Limited | — | 77246 | — | Dissolved | |
| Biyaya Christian Planner | — | 710671 | — | Dissolved | |
| Biz 2 Promote | — | 644309 | — | Dissolved | |
| Biz-Park Developments Inc. | — | 602532 | — | Active | |
| BizAdvsr Business Consulting | — | 691702 | — | Dissolved | |
| BizCom Inc. | — | 643832 | — | Dissolved | |
| BizMart, Inc. | — | 665064 | — | Dissolved | |
| BizSmart | — | 349948 | — | Dissolved | |
| BizSoft Solutions | — | 686939 | — | Dissolved | |
| BizWicket | — | 640922 | — | Dissolved | |
| Bizart Studio | — | 766952 | — | Active | |
| Bizeau BJ Consulting Inc. | — | 648757 | — | Dissolved | |
| Biznexx Consulting Inc. | — | 689054 | — | Dissolved | |
| Bizolver Solutions | — | 671714 | — | Active | |
| Biztech Industries Inc. | — | 630630 | — | Active | |
| Bizvanta Trading Experts Ltd. | — | 702136 | — | Dissolved | |
| Bjorn's XL Detailing | — | 688300 | — | Dissolved | |
| Bla Fab Inc. | — | 669193 | — | Active | |
| Bla-Jac Ltd. | — | 33034 | — | Dissolved | |
| Black & Blue Steak & Seafood Restaurant | — | 704739 | — | Dissolved | |
| Black & Grey Management Inc. | — | 776616 | — | Active | |
| Black & Veatch Canada Company | — | 678435 | — | Active | |
| Black & White Accounting Services | — | 680791 | — | Active | |
| Black & White Computer Solutions Inc. | — | 616917 | — | Dissolved | |
| Black Anchor Bed & Breakfast Ltd. | — | 631714 | — | Dissolved | |
| Black Angus Management Solutions Inc. | — | 657826 | — | Dissolved | |
| Black Arcs Inc. | — | 682150 | — | Active | |
| Black Armor Asphalt Sealing & Patching | — | 346821 | — | Dissolved | |
| Black As Knight Asphalt Maintenance | — | 674997 | — | Dissolved | |
| Black As Knight Asphalt Maintenance B.A.K.A.M. | — | 676544 | — | Dissolved | |
| Black Atlantic Media | — | 764297 | — | Active | |
| Black August Promotions | — | 616295 | — | Dissolved | |
| Black Bean Bike Cafe & Cycle Fit Studio | — | 686823 | — | Dissolved | |
| Black Bear Apiary | — | 711374 | — | Active | |
| Black Bear Enterprises Co. Ltd. | — | 627004 | — | Dissolved | |
| Black Bear Properties Inc. | — | 741822 | — | Active | |
| Black Bears Youth Softball Inc. | — | 699674 | — | Pending | |
| Black Belyea Private Wealth Management | — | 732583 | — | Active | |
| Black Bird Stove & Chimney | — | 754988 | — | Active | |
| Black Box Catering | — | 734162 | — | Active | |
| Black Brook Energy Limited Partnership | — | 640980 | — | Dissolved | |
| Black Brook Energy Limited Énergie Black Brook Limitée | — | 622058 | — | Dissolved | |
| Black Brook Investments Limited Les Investissements Black Brook Limitée | — | 619146 | — | Merged | |
| Black Butterfly Studio | — | 671073 | — | Dissolved | |
| Black Cat Business & IT Solutions | — | 694269 | — | Dissolved | |
| Black Cat Plumbing | — | 761585 | — | Active | |
| Black Clover Investments | — | 728561 | — | Dissolved | |
| Black Cove Realty Inc. | — | 728870 | — | Pending | |
| Black Crab Kayaks | — | 761488 | — | Active | |
| Black Diamond Events | — | 656176 | — | Dissolved | |
| Black Dog Cafe and Smoke Shop Inc. | — | 682994 | — | Dissolved | |
| Black Dog Consulting Ltd. | — | 675822 | — | Dissolved | |
| Black Dog Entertainment | — | 352269 | — | Dissolved | |
| Black Dog Gardens Inc. | — | 732023 | — | Pending | |
| Black Dog IT | — | 740125 | — | Active | |
| Black Door Studio Salon & Spa | — | 661406 | — | Dissolved | |
| Black Douglas Holdings Ltd. | — | 623490 | — | Merged | |
| Black Duck Cafe | — | 676761 | — | Dissolved | |
| Black Duck Hostel | — | 666208 | — | Dissolved | |
| Black Duck Restaurants Incorporated | — | 710137 | — | Active | |
| Black Ember Consulting | — | 736923 | — | Dissolved | |
| Black Eyed Dog N.B. Inc. | — | 621025 | — | Dissolved | |
| Black Face Lift | — | 346594 | — | Dissolved | |
| Black Fern Holdings Ltd. | — | 732886 | — | Active | |
| Black Fly Racing | — | 689905 | — | Dissolved | |
| Black Fly Racing Inc. | — | 633783 | — | Dissolved | |
| Black Forest Bakery Inc. | — | 739056 | — | Active | |
| Black Fox Builders | — | 708565 | — | Dissolved | |
| Black Galley Distilling | — | 703216 | — | Dissolved | |
| Black Galley Distilling Inc. | — | 716197 | — | Active | |
| Black Gold Ventures | — | 763574 | — | Active | |
| Black Hammer Driveway Solutions | — | 775777 | — | Active | |
| Black Hat Poker Supplies | — | 650465 | — | Dissolved | |
| Black Hull Holdings Ltd. | — | 746328 | — | Dissolved | |
| Black Hull Properties Ltd. | — | 746326 | — | Dissolved | |
| Black Ice Basic Lawn Care | — | 734337 | — | Active | |
| Black Jack 2007 | — | 634039 | — | Dissolved | |
| Black Jack Country Bar 2002 | — | 602843 | — | Dissolved | |
| Black Jack Lounge | — | 622688 | — | Dissolved | |
| Black Jack Place Centre-Ville | — | 662631 | — | Dissolved | |
| Black Knight Press Inc. | — | 764070 | — | Active | |
| Black Knight Solutions Inc. | — | 753329 | — | Active | |
| Black Knight Ventures | — | 746530 | — | Active | |
| Black Label Construction | — | 713655 | — | Dissolved | |
| Black Label Marketing Group Inc. | — | 737658 | — | Dissolved | |
| Black Line Design | — | 752101 | — | Active | |
| Black Lion Restaurant & Pub Ltd | — | 650491 | — | Dissolved | |
| Black Lotus Premium E-Liquid LTD. | — | 684775 | — | Dissolved | |
| Black Mark Inc. | — | 612134 | — | Dissolved | |
| Black Mom's NB Network Inc. | — | 759141 | — | Pending | |
| Black Moose Investment Ltd. | — | 725898 | — | Active | |
| Black Mountain Contracting Inc. | — | 748833 | — | Active | |
| Black Mountain Exteriors | — | 724509 | — | Dissolved | |
| Black Mountain Exteriors Inc. | — | 725677 | — | Withdrawn | |
| Black Mountain Group Inc. | — | 758901 | — | Active | |
| Black Mountain Real Estate Corporation | — | 758902 | — | Active | |
| Black Pear Piercing | — | 718173 | — | Active | |
| Black Pixel Marketing Inc. | — | 747003 | — | Dissolved | |
| Black Pug Records Canada Inc. | — | 761563 | — | Active | |
| Black Rabbit Processing | — | 350418 | — | Dissolved | |
| Black Rapids Retreat | — | 742156 | — | Active | |
| Black River Castings Ltd. | — | 609768 | — | Active | |
| Black River Designs | — | 638414 | — | Dissolved | |
| Black River Fisheries Inc. | — | 732493 | — | Active | |
| Black River Welding, Fabrication & Machining Inc. | — | 711960 | — | Active | |
| Black River Woodworking | — | 777314 | — | Active | |
| Black Sea Transportation Ltd. | — | 689018 | — | Dissolved | |
| Black Seal Paving and Chipsealing | — | 668914 | — | Dissolved | |
| Black Sheep Brewery | — | 689662 | — | Dissolved | |
| Black Sheep Construction Inc. | — | 768492 | — | Active | |
| Black Sheep Fisheries Ltd. | — | 707813 | — | Active | |
| Black Sheep Keepsakes | — | 737732 | — | Active | |
| Black Silver Capital Corp. | — | 767983 | — | Active | |
| Black Spruce Construction | — | 727290 | — | Active | |
| Black Spruce Drafting and Design Ltd. | — | 734826 | — | Active | |
| Black Spruce Lodge | — | 612663 | — | Dissolved | |
| Black Spruce Lodge Ltd. | — | 620499 | — | Active | |
| Black Spruce Rugby Football Club Inc. | — | 507881 | — | Dissolved | |
| Black Star Publishing | — | 670031 | — | Dissolved | |
| Black Tartan Media (2024) Inc. | — | 754476 | — | Active | |
| Black Tie Candle Company Inc. | — | 751391 | — | Active | |
| Black Tiger 22 Inc. | — | 732121 | — | Dissolved | |
| Black Timber Creek | — | 775098 | — | Active | |
| Black Top Sensors | — | 720228 | — | Active | |
| Black Tusk Holdings Ltd. | — | 686502 | — | Pending | |
| Black Tusk Management (2006) Inc. | — | 626494 | — | Withdrawn | |
| Black Veil Bridal Weddings and Events | — | 701736 | — | Dissolved | |
| Black Watch Highland Dancing Association | — | 654683 | — | Dissolved | |
| Black Water Designs Limited | — | 618039 | — | Merged | |
| Black Willow Salon | — | 779135 | — | Active | |
| Black Willow Salon Inc. | — | 778868 | — | Dissolved | |
| Black Wolf Studios | — | 743658 | — | Active | |
| Black Wood Publishing | — | 663325 | — | Dissolved | |
| Black in Maritimes Podcast | — | 719148 | — | Dissolved | |
| Black in the Maritimes Podcast Inc. | — | 721459 | — | Dissolved | |
| Black mac pressure seal | — | 701686 | — | Active | |
| Black ops | — | 611429 | — | Dissolved | |
| Black's Embroidered Sportswear Ltd. | — | 615663 | — | Dissolved | |
| Black's Harbour Transfer Ltd./Transport Black's Harbour Ltee. | — | 513589 | — | Dissolved | |
| Black's Holdings Ltd. | — | 674045 | — | Active | |
| Black's Partnership | — | 673651 | — | Dissolved | |
| Black's Reload Ltd. | — | 687816 | — | Dissolved | |
| Black's Transfer Ltd. | — | 687815 | — | Dissolved | |
| BlackBuck General Contractor Ltd. | — | 776803 | — | Active | |
| BlackDiamondRecords | — | 616633 | — | Dissolved | |
| BlackDog Solutions Inc. | — | 621051 | — | Active | |
| BlackGold Investment Holdings Ltd. | — | 678336 | — | Dissolved | |
| BlackLantic Media | — | 733873 | — | Dissolved | |
| BlackRock Asia Property Fund V GP S.à r.l. | — | 707987 | — | Active | |
| BlackRock Asset Management Canada Limited | — | 76654 | — | Merged | |
| BlackRock Europe Property Fund V GP S.à r.l. | — | 705771 | — | Active | |
| BlackRock US Core Property Fund, L.P. | — | 695849 | — | Active | |
| BlackRock Ventures Inc. | — | 628947 | — | Merged | |
| BlackWing Investments Inc. | — | 702152 | — | Merged | |
| BlackWolf Construction Inc. | — | 733628 | — | Dissolved | |
| Blackbeard Leathers and Upholstery | — | 727592 | — | Active | |
| Blackbird Customs | — | 675129 | — | Dissolved | |
| Blackbird Customs Inc. | — | 694361 | — | Active | |
| Blackbird Security Inc. | — | 739252 | — | Active | |
| Blackbird/Gamble Consulting Services Ltd. | — | 641373 | — | Dissolved | |
| Blackcap Renos | — | 741488 | — | Active | |
| Blackfin III Co. | — | 600023 | — | Dissolved | |
| Blackflag sales & service | — | 702710 | — | Dissolved | |
| Blackfly Gazette | — | 663857 | — | Dissolved | |
| Blackfly Gazette | — | 697784 | — | Active | |
| Blackforest woodworking | — | 751355 | — | Active | |