| 41 Madeira Avenue Company Limited | Households | 2003 |
| ABD Comms Ltd | Administrative & support | 2016 |
| Abif Northants | Information & communication | 2013 |
| ABT Driving Ltd | Transport & logistics | 2020 |
| Accountancy & Book-Keeping Business Support Ltd | Professional & scientific | 2017 |
| Active Olive Healthcare Ltd | Transport & logistics | 2014 |
| Alliance Ceramicsteel Products | | 1991 |
| Altitude Safety Limited | Administrative & support | 2009 |
| Apricus Financial Planning Limited | Financial services | 2022 |
| Artlenock Property Ltd | Construction | 2025 |
| Barber at Irthlingdorough Ltd | Other services | 2025 |
| Barmax Limited | Financial services | 2020 |
| Beyond Tailored Ltd | Wholesale & retail | 2019 |
| Bogagolf Ltd | Wholesale & retail | 2025 |
| Book My Course Limited | Administrative & support | 2007 |
| Central Garage (Irthlingborough) Limited | Wholesale & retail | 1972 |
| Charles Weston House Palace Gate RTM Company Limited | Households | 2024 |
| Citrus Training Limited | Other services | 2004 |
| Claire's Properties Ltd | Real estate | 2021 |
| Clark Aggregates Ltd | Wholesale & retail | 2012 |
| D M B Plumbing & Heating Limited | Administrative & support | 2014 |
| Dachs-Around Ltd | Transport & logistics | 2021 |
| Danihar Technology Ltd | Information & communication | 2015 |
| Eden Landscape Projects Limited | Administrative & support | 2001 |
| Electro Engineering Holdings Ltd | Financial services | 2025 |
| Electro Engineering Properties Ltd | Real estate | 2025 |
| Elmore Education Limited | Education | 2016 |
| Ferrersmere Estates Limited | Real estate | 2013 |
| Fingerprint Associates Limited | Professional & scientific | 2008 |
| Foster and Sons Total Transport Limited | Transport & logistics | 2008 |
| GNT Carpentry Ltd | Construction | 2015 |
| Griggs Properties Limited | Real estate | 2015 |
| Harvest Galaxy Limited | Hospitality | 2017 |
| HMS Property Developments Ltd | Real estate | 2025 |
| HN Tech Ltd | Administrative & support | 2023 |
| J W Clark Limited | Construction | 2002 |
| Jenda UK Limited | Water & waste | 2004 |
| John Griggs Limited | Real estate | 1997 |
| Jwcl Ltd | Real estate | 2024 |
| Laika Digital Ltd | Information & communication | 2019 |
| Lavender Support Services Limited | Health & social care | 2010 |
| Lindsay Dalton Ltd | Other services | 2020 |
| LMP Technical Services Limited | Information & communication | 1990 |
| Lt&R Limited | Transport & logistics | 2016 |
| Luxury Living Interiors Limited | Construction | 2024 |
| Lyko Limited | Professional & scientific | 2017 |
| M&P Plumbing and Heating Ltd | Construction | 2024 |
| Meraki Bloom Limited Partnership | | 2021 |
| Midland Industrial Heating Limited | Construction | 2010 |
| Obsidian Consultancy Ltd | Professional & scientific | 2018 |
| Overton Design Ltd | Professional & scientific | 2009 |
| P.D.A. Enterprises Limited | Transport & logistics | 1989 |
| Park Express Light Haulage Ltd | Transport & logistics | 2026 |
| Penn Brothers Limited | Administrative & support | 2013 |
| Penny Store Ltd | Wholesale & retail | 2024 |
| PKE Taranis Limited | Information & communication | 2018 |
| Premium Bespoke Ltd | Manufacturing | 2026 |
| R Griggs & Co. Limited | Financial services | 2013 |
| Robert Pack Cricket Ltd | Wholesale & retail | 2008 |
| Rollin' Rage Rooms Ltd | Arts & recreation | 2024 |
| Salonserve Hair & Beauty Supplies Ltd | Wholesale & retail | 1994 |
| Sentinel Consultancy Ltd | Professional & scientific | 2013 |
| SLM Tech Tools Ltd | Wholesale & retail | 2015 |
| Spencer & James Limited | Administrative & support | 2021 |
| Spice 1 Junction Ltd | Hospitality | 2019 |
| Stephen Limbert Wealth Management Limited | Financial services | 2021 |
| Tandoori Nights 89 Ltd | Hospitality | 2023 |
| Taylor Roofing & Maintenance Ltd | Construction | 2023 |
| TE Electrical Contractors Ltd | Construction | 2019 |
| Toutmoun Ltd | Information & communication | 2025 |
| Trotman Construction Limited | Construction | 2011 |
| Utile Holdings Limited | Financial services | 2003 |
| Utile Limited | Professional & scientific | 2003 |
| Utile Properties Limited | Real estate | 2003 |
| W M G Investments Limited | Financial services | 2014 |
| Wonder Beauty Ltd | Wholesale & retail | 2017 |
| Wrightsons Limited | Manufacturing | 2009 |