| "Beon" Support Ltd | Construction | 2022 |
| 'A' Plus Accountants Limited | Professional & scientific | 2002 |
| 100THOUSAND Limited | Extraterritorial | 2018 |
| 116 Consulting Limited | Professional & scientific | 2026 |
| 12-22 Berneshaw Close Corby RTM Company Ltd | Households | 2015 |
| 1ST Choice Lettings (Corby) Ltd | Real estate | 2019 |
| 1ST Class Cuisine Ltd | Hospitality | 2024 |
| 1ST4RENT Limited | Wholesale & retail | 2006 |
| 2 Fleming Road Limited | Real estate | 2023 |
| 22 Belmont Road Freehold Limited | Households | 2023 |
| 222 Jm&Sd Ltd | Health & social care | 2025 |
| 23 Automotive Limited | Administrative & support | 2009 |
| 23 Automotive Smart Repair Limited | Wholesale & retail | 2018 |
| 24ULY Transport Ltd | Transport & logistics | 2026 |
| 28 Days Activity Ltd | Health & social care | 2025 |
| 3 Borders Limited | Professional & scientific | 2013 |
| 3 FFF Limited | Manufacturing | 2007 |
| 31 Women Limited | Health & social care | 2015 |
| 33 FAB Ltd | Manufacturing | 2021 |
| 360 Hotels and Resorts Ltd | Administrative & support | 2003 |
| 360 MEP Solutions Ltd | Professional & scientific | 2023 |
| 3802 Ltd | Other services | 2019 |
| 3BN Care Ltd | Public administration | 2021 |
| 3D Sports Limited | Manufacturing | 1979 |
| 3LEYS Ltd | Health & social care | 2014 |
| 4 Locals Limited | Information & communication | 2011 |
| 48 Avenue Films Limited | Information & communication | 2026 |
| 4GALLONVENTURES Limited | Real estate | 2015 |
| 4P Property Ltd | Real estate | 2018 |
| 4SURE Coaching Ltd | Education | 2017 |
| 4SURE Holdings Limited | Financial services | 2015 |
| 4SURE Propco Ltd | Real estate | 2023 |
| 4SURE Solutions Ltd | Manufacturing | 2006 |
| 4TY7 Ltd | Professional & scientific | 2025 |
| 4X4GLOBAL Exports Limited | Transport & logistics | 2016 |
| 55 Causeway Road Limited | Real estate | 2018 |
| 7 & 9 Collingwood Avenue Limited | Real estate | 2005 |
| 7 Day Euro Ltd | Wholesale & retail | 2022 |
| 7 Days Corby Ltd | Wholesale & retail | 2025 |
| 7 Formation Limited | Construction | 2008 |
| 7 Property Holdings Limited | Real estate | 2022 |
| 777RETURN Limited | Wholesale & retail | 2025 |
| 7BAGS Ltd | Wholesale & retail | 2016 |
| 7F Plant Hire Ltd | Construction | 2024 |
| 7F Trading Limited | Financial services | 2017 |
| 8 1 4 Services Ltd | Information & communication | 2024 |
| 814 2 Ltd | Administrative & support | 2024 |
| 9ILBURY Ltd | Professional & scientific | 2024 |
| A & G Plumbing and Heating Limited | Construction | 2012 |
| A and T'S Property Limited | Real estate | 2024 |
| A D Stan Limited | Transport & logistics | 2025 |
| A F Adams Services Ltd | Transport & logistics | 2016 |
| A G M Telematics Limited | Wholesale & retail | 2000 |
| A J R Carpentry Limited | Construction | 2002 |
| A L Baltateanu Ltd | Wholesale & retail | 2023 |
| A Nistor Limited | Transport & logistics | 2018 |
| A Norrie Group Ltd | Financial services | 2024 |
| A Patel Limited | Hospitality | 2012 |
| A&D Dream Home Ltd | Real estate | 2024 |
| A&D Secure Limited | Wholesale & retail | 2023 |
| A&D Solutions Ltd | Administrative & support | 2023 |
| A&J Electrical Ltd | Construction | 2024 |
| A&M Roman Ltd | Transport & logistics | 2022 |
| A&M Signature Logistics Ltd | Transport & logistics | 2026 |
| A. Charles Limited | Manufacturing | 2014 |
| A. Major Plumbing and Heating Ltd | Construction | 2023 |
| A. Saeed Dent Services Ltd | Health & social care | 2015 |
| A.J. Mazur Ltd | Administrative & support | 2009 |
| A.J.K Trans Ltd | Transport & logistics | 2022 |
| A.M. Established Company Limited | Professional & scientific | 2018 |
| A.R. Electrics Limited | Construction | 1998 |
| A.R.Global Consultancy Limited | Professional & scientific | 2024 |
| A.S. Transport Services Ltd | Transport & logistics | 2017 |
| A.Star Cleaning Ltd | Administrative & support | 2026 |
| A1 Universal Trim Ltd | Other services | 2025 |
| A43 Route Ltd | Transport & logistics | 2024 |
| AA GAS & Plumbing (Midlands) Limited | Construction | 2019 |
| AAA Muhandis Limited | Administrative & support | 2025 |
| AAJ Groundforce Limited | Construction | 2025 |
| Aashirvad Properties Limited | Real estate | 2022 |
| AB2 Property Developments Ltd | Real estate | 2021 |
| ABC Freight Ltd | Transport & logistics | 2022 |
| ABC Macintosh Limited | Manufacturing | 1998 |
| Abcline Ltd | Transport & logistics | 2018 |
| ABD Estates Limited | Real estate | 2020 |
| Abel Investments Limited | Financial services | 2013 |
| Abel&Nova Construction Ltd | Construction | 2025 |
| ABG Motors Ltd | Transport & logistics | 2017 |
| Above and Beyond Estate Ltd | Construction | 2023 |
| Abrinvest Limited | Agriculture & fishing | 2012 |
| Absolute Monarchy Limited | Health & social care | 2016 |
| AC Business Machines Ltd | Manufacturing | 2014 |
| AC on Wheels Ltd | Transport & logistics | 2015 |
| AC Toyz Ltd | Wholesale & retail | 2020 |
| ACA Logistics Limited | Transport & logistics | 2020 |
| Acah Limited | Health & social care | 2016 |
| Access Care Group Ltd | Health & social care | 2020 |
| Access Defender Ltd | Professional & scientific | 2024 |
| Accountancy Holdings Limited | Financial services | 2024 |
| Accounte Limited | Professional & scientific | 2016 |