| 1 the Print Works RTM Company Limited | Real estate | 2012 |
| 15 Barnsdale Limited | Construction | 2020 |
| 20 ST Marys Ltd | Hospitality | 2020 |
| 208 LR Ltd | Real estate | 2021 |
| 25 Glazbury Road Ltd | Real estate | 2009 |
| 268 Worple Road Ltd | Real estate | 2019 |
| 27 Parliament Hill Limited | Households | 2012 |
| 2B Enabled Ltd | Real estate | 2003 |
| 2GETHER Homes Limited | Real estate | 2017 |
| 2PSERVICES Limited | Construction | 2019 |
| 2U Limited | Information & communication | 2005 |
| 33 James Street Limited | Households | 2000 |
| 369 Vortex Limited | Financial services | 2023 |
| 37 the Point Ltd | Real estate | 2023 |
| 4 Your Foot Solutions Limited | Wholesale & retail | 2020 |
| 42 Fibre Limited | Information & communication | 2024 |
| 4C Strategies Limited | Information & communication | 1998 |
| 4DEES Same Day Courier Services Ltd | Transport & logistics | 2005 |
| 53 the Square Ltd | Hospitality | 2003 |
| 56 Tetherdown Limited | Households | 2010 |
| 5BGS Limited | Construction | 2020 |
| 6 Montagu Square Limited | Administrative & support | 1986 |
| 6T3 (UK) Ltd. | Professional & scientific | 2019 |
| 7 Dynham Road Limited | Households | 1994 |
| 77 Landscaping Limited | Administrative & support | 2018 |
| 88 Watt Ltd | Manufacturing | 2017 |
| 96 Degrees (Leicestershire) Limited | Extraterritorial | 2022 |
| A & B Murphy's Taxis Limited | Extraterritorial | 2008 |
| A & B Turney Limited | Professional & scientific | 1989 |
| A a Kaya Ltd | Hospitality | 2016 |
| A Childs Journey Ltd | Health & social care | 2025 |
| A D Handling Limited | Wholesale & retail | 2012 |
| A Healey Electrical Ltd | Construction | 2024 |
| A L Consulting (UK) Limited | Information & communication | 2001 |
| A L Hill Plant Hire Ltd | Construction | 2003 |
| A M K Motorsport Limited | Arts & recreation | 2013 |
| A Marriott Consultant Ltd | Professional & scientific | 2024 |
| A R Lowther Projects Ltd | Professional & scientific | 2022 |
| A&M Property Ventures Limited | Real estate | 2024 |
| A&M Woodland Limited | Agriculture & fishing | 2025 |
| A&U Dental Surgeries Limited | Health & social care | 2015 |
| A&U Holdings Ltd | Financial services | 2013 |
| A&U Lmos Limited | Health & social care | 2024 |
| A&U Real Estate Limited | Real estate | 2019 |
| A. I. Gelber Ltd | Information & communication | 2025 |
| A. L. L. Manners Ltd | Arts & recreation | 2023 |
| A. Potter Services Ltd | Other services | 2013 |
| A2B1 Ltd | Transport & logistics | 2026 |
| A5 Trade Sales Ltd | Wholesale & retail | 2019 |
| AA Builders Leicester Ltd | Construction | 2005 |
| Aaonline Ltd | Information & communication | 2026 |
| AAW Group Ltd | Extraterritorial | 2020 |
| AB Commercial HR Solutions Limited | Administrative & support | 2015 |
| Abacus Childcare Limited | Other services | 1994 |
| Abakus Limited | Extraterritorial | 2010 |
| Abbey Cottage Ltd | Hospitality | 2015 |
| Abbott Construction Services Ltd | Real estate | 1987 |
| Abel Electrical (UK) Limited | Construction | 2014 |
| Abigail Shiers PR Ltd | Professional & scientific | 2021 |
| Abigan Ltd | Real estate | 2025 |
| Abladora Limited | Professional & scientific | 1969 |
| Absolute Internet Marketing Ltd | Information & communication | 2014 |
| Abtec Building Technologies Ltd | Manufacturing | 2011 |
| Abtec Group Holdings Ltd | Financial services | 2024 |
| Abtec Network Systems Ltd. | Information & communication | 1997 |
| ABV Pubs Ltd | Hospitality | 2004 |
| Accretive Sports Limited | Professional & scientific | 2022 |
| Accuman Agencies Limited | Extraterritorial | 2020 |
| Acharya Ayurveda Limited | Other services | 2023 |
| Acorn (Leicester) Ltd | Financial services | 2015 |
| Acorn Storage Containers Limited | Other services | 2025 |
| Acre Design Studio Limited | Professional & scientific | 2024 |
| ACS Hospitality and Leisure Limited | Hospitality | 2026 |
| Actifwear Limited | Manufacturing | 2008 |
| Active Chiropractic Centres Ltd | Health & social care | 2014 |
| Active Controls Limited | Manufacturing | 2003 |
| Acuitypublishing Limited | Information & communication | 2014 |
| Adapt Heating Solutions Ltd | Construction | 2021 |
| ADI Media Ltd | Information & communication | 2024 |
| Adkast Developments Limited | Administrative & support | 2015 |
| Admiral Court Property Management Limited | Real estate | 2018 |
| Adrian F Bloomfield Limited | Financial services | 2002 |
| Adsr Holdings Limited | Construction | 2018 |
| Advance Property Services (Leicester) Limited | Construction | 2010 |
| Advanced Supply Chain Analytics Ltd | Professional & scientific | 2024 |
| Advantage Bookkeeping Services Ltd | Professional & scientific | 2023 |
| Aesthetics Defined Limited | Other services | 2017 |
| AFC Rugby Ltd | Arts & recreation | 2023 |
| Affinity Sales Europe Ltd | Wholesale & retail | 2014 |
| Aftr Market Limited | Wholesale & retail | 2023 |
| AG Managed Services Ltd | Information & communication | 2013 |
| AGD Europe Ltd | Manufacturing | 2013 |
| Ager Developments Ltd | Construction | 2006 |
| Ager Homes LLP | | 2026 |
| AGM Sports Cars Ltd | Manufacturing | 2016 |
| AI Elevation Ltd | Information & communication | 2024 |
| AIO Vision Ltd | Other services | 2015 |
| Airfield Business Park Management Company Limited | Administrative & support | 2008 |
| Airfield Consultants Limited | Other services | 2012 |
| Airpiercer Motor Company Ltd | Wholesale & retail | 2023 |