| AK Mortgages & Finance Ltd | Financial services | 2022 |
| Cornerhouse Architects Ltd | Professional & scientific | 2016 |
| Countrywide Fencing (Northants) LLP | | 2026 |
| Crystal DP Property Maintenance Limited | Professional & scientific | 2008 |
| Crystal Electronics Limited | Construction | 2003 |
| Crystal Electronics Trustees Limited | Other services | 2025 |
| Dream Days Nursery Limited | Health & social care | 2020 |
| Dream Days Property Limited | Real estate | 2026 |
| Dunnett & Curtis | | 1991 |
| E.A. Agutter Limited | Construction | 1980 |
| Earls Barton Auto Services Limited | Wholesale & retail | 2003 |
| Earls Barton MOT Company Limited | Wholesale & retail | 2009 |
| Fardini Wealth Management Limited | Financial services | 2014 |
| Flexdrive Ltd | Education | 2016 |
| Glass House Living Ltd | Wholesale & retail | 2025 |
| Gorse Property Services Ltd | Real estate | 2019 |
| Grosvenor Painting Contractors Limited | Construction | 2017 |
| Guardian Security Products (Northampton) Ltd | Construction | 2013 |
| HI Tech Homes Ltd | Real estate | 2021 |
| JSJ Construction Holdings Limited | Financial services | 2017 |
| NJ Barber Properties Ltd | Other services | 2018 |
| Northants Concrete Group Limited | Manufacturing | 2016 |
| Onovo Enterprises Limited | Professional & scientific | 2015 |
| Rhino Fencing and Decking Ltd | Construction | 2025 |
| S & V Barton Ltd | Wholesale & retail | 2023 |
| Sgfl Renovations Ltd | Construction | 2023 |
| Strandor Roofing Limited | Construction | 2001 |
| Subterranean Metaphysical Limited | Extraterritorial | 2008 |
| Taskworks (UK) Limited | Information & communication | 2016 |
| THE Donut Hub Ltd | Manufacturing | 2021 |
| THINK5AXIS Ltd | Professional & scientific | 2009 |
| Thorn (Northampton) Group Holdings Ltd | Real estate | 2024 |
| Track 7 Couriers Ltd | Transport & logistics | 2015 |
| Woolven Evans (Engineers) Limited | Professional & scientific | 1968 |