| HarbourVest Partners (Canada) Limited | — | 704178 | — | Active | |
| Harbourfront Wealth Group | — | 772136 | — | Active | |
| Harbouring Wellness Inc. | — | 771346 | — | Active | |
| Harbourpoint Telecom Solutions | — | 769112 | — | Active | |
| Harbourside Cabins & Marina Inc. | — | 697842 | — | Active | |
| Harbourside Properties and Services | — | 721769 | — | Dissolved | |
| Harbourview Emporium | — | 733704 | — | Dissolved | |
| Harbourview Emporium | — | 778624 | — | Active | |
| Harbourview Infusion and Injection Care Clinic Ltd. | — | 687133 | — | Withdrawn | |
| Harbourview Pharmacy Inc. | — | 736111 | — | Active | |
| Harbourview Refrigeration | — | 715122 | — | Dissolved | |
| Harbourvue Horizon | — | 751794 | — | Active | |
| Harcourt Assessment | — | 623386 | — | Dissolved | |
| Harcourt Service District Community Development Inc. | — | 672587 | — | Pending | |
| Hard At Er Contracting | — | 701759 | — | Dissolved | |
| Hard Bean Beverages | — | 752600 | — | Active | |
| Hard Charger Music | — | 680746 | — | Active | |
| Hard Knocks Autobody | — | 752708 | — | Active | |
| Hard Luck Woman Record Shop | — | 756045 | — | Active | |
| Hard Rock Construction Ltd. | — | 651230 | — | Dissolved | |
| Hard Rock Drilling | — | 351000 | — | Dissolved | |
| Hard Rock Masonry Ltd. | — | 687888 | — | Active | |
| Hard Way Cycles Ltd. | — | 654115 | — | Active | |
| Hard at Play | — | 693093 | — | Dissolved | |
| HardKnox Apparel | — | 684664 | — | Dissolved | |
| HardKnox Apparel | — | 677504 | — | Dissolved | |
| Hardcore Logging Inc. | — | 722115 | — | Active | |
| Hardie Boys Landscaping Limited | — | 693548 | — | Dissolved | |
| Harding Contracting Limited | — | 513027 | — | Active | |
| Harding Health and Wellness Clinic Inc. | — | 632109 | — | Dissolved | |
| Harding Insurance | — | 654832 | — | Dissolved | |
| Harding Laundry Station | — | 625947 | — | Dissolved | |
| Harding Lawson Associates ES, Inc. | — | 73488 | — | Dissolved | |
| Harding Logging Ltd. | — | 695824 | — | Active | |
| Harding Medical Supplies | — | 620335 | — | Active | |
| Harding Outdoor Wood Furnaces | — | 351789 | — | Dissolved | |
| Harding Rapid Air Photos | — | 683379 | — | Dissolved | |
| Harding Rejuvenation Centers Inc. | — | 750285 | — | Active | |
| Harding Studios | — | 637247 | — | Dissolved | |
| Harding and Associates Wealth Management and Financial Planning Inc. | — | 708054 | — | Active | |
| Hardrock Shop | — | 727042 | — | Dissolved | |
| Hardt Trading Ltd. | — | 649611 | — | Active | |
| Hardway Enterprises | — | 716018 | — | Active | |
| Hardwire Trading | — | 718794 | — | Dissolved | |
| Hardwired Communications | — | 675264 | — | Dissolved | |
| Hardwired Electronics & Communications | — | 689072 | — | Dissolved | |
| Hardwired Electronics & Communications | — | 734729 | — | Active | |
| Hardwired Electronics and Communications Inc. | — | 681588 | — | Dissolved | |
| Hardwood Hills Forest Products | — | 778736 | — | Active | |
| Hardwood Ridge Contracting | — | 730518 | — | Dissolved | |
| Hardy Creek Wind GP, Inc. | — | 682870 | — | Active | |
| Hardy Guitars | — | 604979 | — | Dissolved | |
| Hardy Home Inspections | — | 774849 | — | Active | |
| Hardy Preferred Investments 401K Profit Sharing Plan Inc. | — | 697480 | — | Dissolved | |
| Hardy's Holdings Ltd. | — | 732119 | — | Active | |
| Hare's Bears Outfitters | — | 642656 | — | Dissolved | |
| Harem Internet Services Inc. | — | 510032 | — | Active | |
| Harewaye Harvesting | — | 746284 | — | Active | |
| Harewood Truck & Trailer Inc. | — | 644359 | — | Dissolved | |
| Hargrove and Bauer Outdoor Adventures | — | 673090 | — | Dissolved | |
| Hari Holdings | — | 740162 | — | Active | |
| Harlen Brews | — | 737255 | — | Active | |
| Harley Strategic Consulting | — | 705455 | — | Active | |
| Harley-Davidson Credit Corp. | — | 74950 | — | Dissolved | |
| Harley-Davidson Leasing, Inc. | — | 75922 | — | Dissolved | |
| Harley-Davidson of Moncton | — | 729894 | — | Active | |
| HarleyWillies Service & Towing | — | 680692 | — | Dissolved | |
| Harling Management Group Inc. | — | 512561 | — | Dissolved | |
| Harling Management Group Ltd. | — | 711031 | — | Active | |
| Harmen Van Roeden Painting | — | 600292 | — | Dissolved | |
| Harmon Farm Ventures | — | 623505 | — | Dissolved | |
| Harmonic Machine Project | — | 748946 | — | Active | |
| Harmonie Thérapie | — | 646410 | — | Dissolved | |
| Harmonie Totale NB | — | 752519 | — | Active | |
| Harmonized Heart Energetics | — | 680538 | — | Dissolved | |
| Harmony - Home Support and Family Services | — | 693524 | — | Dissolved | |
| Harmony Consulting Services | — | 637923 | — | Dissolved | |
| Harmony Flooring & Countertops | — | 675595 | — | Dissolved | |
| Harmony Growers | — | 613348 | — | Dissolved | |
| Harmony Hair & Beauty by Harman | — | 778734 | — | Active | |
| Harmony Healthcare Solutions | — | 776372 | — | Dissolved | |
| Harmony Healthcare Solutions Inc. | — | 777576 | — | Active | |
| Harmony Hill Farm Ltd. | — | 734904 | — | Active | |
| Harmony Plus Body Therapy | — | 642833 | — | Dissolved | |
| Harmony Self Care Project | — | 625119 | — | Dissolved | |
| Harmony Soaps & Oils Limited | — | 609488 | — | Dissolved | |
| Harmony Tax Advantage Group Limited / Groupe Avantage fiscal Harmony Limitee | — | 646361 | — | Dissolved | |
| Harmony of Soul Reiki | — | 697188 | — | Dissolved | |
| Harnish Holdings Ltd. | — | 669237 | — | Dissolved | |
| Harnish and Sons Forestry Ltd. | — | 723982 | — | Active | |
| Harnois Groupe Immobilier Inc. | — | 742478 | — | Active | |
| Harold G. Walker, CPA Professional Corporation | — | 616112 | — | Active | |
| Harold R. Investments Ltd. | — | 30141 | — | Dissolved | |
| Harold's Hideaway Glamping Co. Ltd. | — | 769603 | — | Active | |
| Harpco Holdings Inc. | — | 641860 | — | Merged | |
| Harper Building Inc. | — | 735201 | — | Active | |
| Harper Holdings Ltd. | — | 1021 | — | Active | |
| Harper Trucking | — | 348308 | — | Dissolved | |
| Harper Trucking Ltd. | — | 510875 | — | Dissolved | |
| Harper's Exotic Animals & Pet Supply Incorporated | — | 700270 | — | Pending | |
| Harper's Heating Service | — | 673222 | — | Dissolved | |
| Harquail's Convenience Inc | — | 635877 | — | Dissolved | |
| HarriMac Holdings Inc. | — | 723382 | — | Dissolved | |
| Harrigan Holdings Ltd. | — | 515170 | — | Active | |
| Harriman Burchill Insurance | — | 667832 | — | Active | |
| Harring Doors | — | 686008 | — | Dissolved | |
| Harris & Partners Advisory Inc. | — | 744027 | — | Dissolved | |
| Harris & Son Painters Inc. | — | 712357 | — | Active | |
| Harris Brothers Logging and Trucking NB Inc. | — | 695823 | — | Active | |
| Harris Consultation and Photography | — | 646626 | — | Active | |
| Harris Lake Lodge Association | — | 713552 | — | Active | |
| Harris Sky Eye Drones | — | 690862 | — | Dissolved | |
| Harris Steel ULC | — | 73759 | — | Merged | |
| Harris Ventures Ltd. | — | 741966 | — | Active | |
| Harris's Redemption Center | — | 618812 | — | Dissolved | |
| Harrisburg Construction & Landscaping | — | 737113 | — | Active | |
| Harrison Brook Holdings (2025) Limited | — | 772681 | — | Active | |
| Harrison Estate Inc. | — | 702298 | — | Active | |
| Harrison Haulers Inc. | — | 759127 | — | Active | |
| Harrison House Gallery | — | 663102 | — | Dissolved | |
| Harrison Integrated Systems | — | 721830 | — | Pending | |
| Harrison Trimble High School Alumni Association Inc. | — | 604119 | — | Dissolved | |
| Harrison Ventures Ltd. | — | 612092 | — | Dissolved | |
| Harrisville Apartments | — | 610693 | — | Dissolved | |
| Harrisville Home Health & Wellness | — | 720082 | — | Active | |
| Harrisville Pharmacy Inc. | — | 718667 | — | Active | |
| Harrisville Plaza / Place Harrisville | — | 641349 | — | Dissolved | |
| Harrisville Subdivision | — | 610694 | — | Dissolved | |
| Harrity Real Estate Services | — | 639826 | — | Dissolved | |
| Harrity Real Estate Services Inc. | — | 645916 | — | Dissolved | |
| Harry A. Moses, Registered Public Accountant | — | 608862 | — | Dissolved | |
| Harry Farms Inc. | — | 706810 | — | Pending | |
| Harry Martin Insurance | — | 719990 | — | Pending | |
| Harry Pictou Trucking | — | 765193 | — | Active | |
| Harry Rowe Renovations Inc | — | 630050 | — | Dissolved | |
| Harry Stanley Insurance | — | 617416 | — | Active | |
| Harry The Ford Guy | — | 776091 | — | Active | |
| Harry's Custom Cabinets | — | 643472 | — | Dissolved | |
| Harry's Energy Services | — | 695814 | — | Dissolved | |
| Harry's Handyman Service | — | 677909 | — | Dissolved | |
| Harry's PC Service | — | 348933 | — | Dissolved | |
| Harry's Pizza | — | 636538 | — | Dissolved | |
| Harsanyi NB Convenience and Gas Ltd. | — | 743494 | — | Active | |
| Harsco Canada Corporation Societe Harsco Canada | — | 617545 | — | Merged | |
| Harsco Canada Corporation Société Harsco Canada | — | 658061 | — | Active | |
| Harsha and Mallika Holdings Ltd. | — | 769044 | — | Active | |
| Hart & Sawyer Writing and Translation Services Ltd. | — | 716594 | — | Dissolved | |
| Hart Global Limited Partnership | — | 758618 | — | Active | |
| Hart Marketing Inc. | — | 515537 | — | Dissolved | |
| Hart Stores Inc. Magasins Hart Inc. | — | 688255 | — | Active | |
| Hart To Hart Builders Inc. | — | 514600 | — | Active | |
| Hartco Distribution Inc. | — | 652377 | — | Dissolved | |
| Hartco Distribution Limited Partnership Distribution Hartco Société en Commandite | — | 620876 | — | Dissolved | |
| Hartej Farms | — | 706057 | — | Dissolved | |
| Hartfelt Images by Natalie | — | 636226 | — | Dissolved | |
| Hartfield Corner Store | — | 678104 | — | Dissolved | |
| Hartfield Service Center | — | 665106 | — | Active | |
| Hartford Development Ltd. | — | 636847 | — | Active | |
| Hartford Farms Ltd. | — | 706501 | — | Active | |
| Hartford Investments Canada Corp./La Corporation D'Investissements Hartford Canada | — | 78075 | — | Dissolved | |
| Hartjes Trucking Ltd. | — | 670141 | — | Dissolved | |
| Hartland Agromart Ltd. | — | 704472 | — | Active | |
| Hartland Agromart Ltd. | — | 696782 | — | Merged | |
| Hartland Baptist Church Inc. | — | 752693 | — | Active | |
| Hartland Boiler Services | — | 700845 | — | Active | |
| Hartland Capital Inc. | — | 688326 | — | Active | |
| Hartland Community Garden Inc. | — | 680951 | — | Active | |
| Hartland Covered Bridge Construction | — | 773457 | — | Active | |
| Hartland Covered Bridge Maple Syrup | — | 694289 | — | Dissolved | |
| Hartland Farmers Market | — | 775203 | — | Active | |
| Hartland Films Inc. | — | 662482 | — | Dissolved | |
| Hartland Fuel Products, L.L.C. | — | 778144 | — | Active | |
| Hartland Helpers Inc. | — | 769674 | — | Active | |
| Hartland Hometown Pharmacy Inc. | — | 720074 | — | Dissolved | |
| Hartland Properties Limited | — | 513681 | — | Merged | |
| Hartland Publishing | — | 613210 | — | Dissolved | |
| Hartland Valu Foods Inc. | — | 773141 | — | Active | |
| Hartland Valu Foods Inc. | — | 640569 | — | Merged | |
| Hartland's River Adventure Boat Tours | — | 351837 | — | Dissolved | |
| Hartlen Homes | — | 351718 | — | Dissolved | |
| Hartlen Homes Ltd. | — | 601671 | — | Dissolved | |
| Hartley Construction | — | 774443 | — | Active | |
| Hartley Developments Inc. | — | 671994 | — | Dissolved | |
| Harts Lake Homestead and Cottage's Inc. | — | 745782 | — | Dissolved | |
| Hartstrings Family Support Center Inc. | — | 627464 | — | Dissolved | |
| Hartt Holdings Inc. | — | 739928 | — | Active | |
| Hartt Island 2024 Campground | — | 757846 | — | Active | |
| Hartt Island Campground Ltd. | — | 676834 | — | Active | |
| Hartt Island RV Resort | — | 648217 | — | Dissolved | |
| Hartt's Maint Consulting Ltd. | — | 652439 | — | Dissolved | |
| Hartzen Consulting LTD. | — | 607825 | — | Dissolved | |
| Harvard Holdco Ltd. | — | 631489 | — | Active | |
| Harvard Investments Ltd. | — | 646914 | — | Active | |
| Harvard Western Insurance | — | 758207 | — | Active | |
| Harvest Dream Into Action Inc. | — | 510362 | — | Dissolved | |
| Harvest Energy Solutions Inc. | — | 642854 | — | Merged | |
| Harvest Field Family Restaurant | — | 347854 | — | Dissolved | |
| Harvest Furniture Imports | — | 613689 | — | Dissolved | |
| Harvest Gold Farms Inc. | — | 710594 | — | Active | |
| Harvest Homes Developments Inc. | — | 726808 | — | Dissolved | |