| 19 Clifton Street RTM Company Limited | Households | 2024 |
| 19 Limited | Professional & scientific | 2005 |
| 1905 Surveying Solutions Limited | Professional & scientific | 2012 |
| 1911 (Leicester) Holdings Limited | Financial services | 2023 |
| 1911INK Ltd | Manufacturing | 2021 |
| 1912 TEN Limited | Real estate | 2017 |
| 1923 Robo Limited | Real estate | 2022 |
| 1934 Ltd | Information & communication | 2016 |
| 1982 Consulting Ltd | Information & communication | 2021 |
| 19GO Business Solutions Limited | Professional & scientific | 2009 |
| 19GO Limited | Administrative & support | 2012 |
| 19GO Logistic Solutions Limited | Transport & logistics | 2011 |
| 19GO Property Solutions Limited | Real estate | 2012 |
| 1AMK Holdings Limited | Financial services | 2025 |
| 1OAK Cura Ltd | Health & social care | 2023 |
| 1PR Limited | Real estate | 2022 |
| 1ST & 1ST Ltd | Administrative & support | 2020 |
| 1ST 4 Warehouse Design Limited | Professional & scientific | 2024 |
| 1ST Call Service (UK) Ltd | Manufacturing | 2009 |
| 1ST Choice 4 Cleaning Ltd | Administrative & support | 2019 |
| 1ST Choice Catering Ltd | Wholesale & retail | 2022 |
| 1ST Choice Holdings Limited | Financial services | 2025 |
| 1ST Choice Investments Limited | Real estate | 2019 |
| 1ST Choice Plumbing,Heating &Cooling Ltd | Construction | 2019 |
| 1ST Choice Safety Training Ltd | Professional & scientific | 2014 |
| 1ST Choice Skip & Grab Hire Ltd | Water & waste | 2011 |
| 1ST Choice Ventilation Ltd | Energy | 2020 |
| 1ST Choice Ventilation Mvhr Distribution Limited | Wholesale & retail | 2025 |
| 1ST Class-Auto Recovery Ltd | Wholesale & retail | 2024 |
| 1ST FIX Property Ltd | Construction | 2018 |
| 1ST Hope Limited | Health & social care | 2022 |
| 1ST Insulation Ltd | Construction | 2022 |
| 1ST Legion Gym Ltd | Other services | 2019 |
| 1ST Link Group Ltd | Transport & logistics | 2018 |
| 1ST Link HGV Driver Training Centre Limited | Education | 2017 |
| 1ST Online Store Ltd | Wholesale & retail | 2024 |
| 1ST Step Education & Training Ltd | Education | 2023 |
| 1ST Stop Fire and Security Solutions Limited | Administrative & support | 2018 |
| 1ST Webdesigns Limited | Information & communication | 2001 |
| 1ST1 Technology Group Limited | Financial services | 2023 |
| 1STNET.AI Ltd | Other services | 2026 |
| 2 Brothers Catering Ltd | Hospitality | 2023 |
| 2 Innovative (Leic) Ltd | Manufacturing | 2019 |
| 2 Innovative Packaging Ltd | Administrative & support | 2024 |
| 2 Know Howe Ltd | Professional & scientific | 2017 |
| 2 Link Ltd | Wholesale & retail | 2020 |
| 2 New Street Property Limited | Real estate | 2017 |
| 2 Wheel Warehouse Ltd | Wholesale & retail | 2020 |
| 2&1 Consulting Limited | Professional & scientific | 2021 |
| 20 Twenty Inventories Limited | Information & communication | 2012 |
| 200 Group Limited | Information & communication | 2019 |
| 200 Strong Limited | Wholesale & retail | 2024 |
| 200 Strong PT Academy Ltd | Education | 2025 |
| 2020 Visuals Limited | Professional & scientific | 2014 |
| 2095 D MAX Limited | Transport & logistics | 2021 |
| 20FT Storage Limited | Other services | 2018 |
| 21 Bowling Green Street Limited | Other services | 1971 |
| 21 Property Management Limited | Real estate | 2024 |
| 210 Catering Limited | Hospitality | 2017 |
| 211 Foods Limited | Hospitality | 2020 |
| 212 Nutrition Limited | Extraterritorial | 2012 |
| 213 Living Limited | Real estate | 2013 |
| 215-217 Leicester Road (Enderby) Limited | Households | 2019 |
| 217 Rentals Limited | Real estate | 2012 |
| 21AMED Ltd | Hospitality | 2023 |
| 21C International Education Training and Services LLP | | 2020 |
| 21POCO Ltd | Wholesale & retail | 2025 |
| 21RG Limited | Real estate | 2023 |
| 22 Collective Limited | Professional & scientific | 2022 |
| 22HD Ltd | Real estate | 2020 |
| 22K Ltd | Real estate | 2021 |
| 23 Entertainment Ltd | Hospitality | 2022 |
| 23 Foxes Ltd | Manufacturing | 2025 |
| 23 Property Ltd | Real estate | 2023 |
| 23 ST. Michael's Mount Management Company Limited | Households | 2000 |
| 234 EPR Ltd | Real estate | 2019 |
| 234 Properties Ltd | Real estate | 2022 |
| 23RD Street Foodchain Limited | Hospitality | 2020 |
| 24 / 7 Protection Limited | Administrative & support | 2020 |
| 24 Distribution Limited | Transport & logistics | 2020 |
| 24 Hours Protection Ltd | Administrative & support | 2025 |
| 24-7 Arms Care Limited | Administrative & support | 2022 |
| 24/7 Construction Ltd | Construction | 2025 |
| 24/7 Flex Care Ltd | Health & social care | 2020 |
| 24/7 Helping Hands Service Ltd | Health & social care | 2014 |
| 245 Holdings Limited | Financial services | 2017 |
| 247 Studios Limited | Arts & recreation | 2017 |
| 247TRADERS UK Limited | Wholesale & retail | 2023 |
| 24FITNESS Ltd | Arts & recreation | 2017 |
| 254 Estates Ltd | Real estate | 2025 |
| 254 Investments Ltd | Financial services | 2025 |
| 26 Regent Street Ltd | Real estate | 2026 |
| 261 Express Limited | Wholesale & retail | 2025 |
| 263RESTAURANT and Bar Ltd | Hospitality | 2022 |
| 26KITCHEN Ltd | Hospitality | 2026 |
| 26MLW Limited | Real estate | 2015 |
| 2711 Consulting Limited | Professional & scientific | 2024 |
| 27B Limited | Wholesale & retail | 2024 |
| 280DC Limited | Real estate | 2025 |
| 281 Vintage Ltd | Wholesale & retail | 2015 |