| Circles Inside Ltd | Health & social care | 2025 |
| Circlesheen Ltd | Wholesale & retail | 2020 |
| Circlesmcr Limited | Professional & scientific | 2025 |
| Circo Interiors Ltd | Manufacturing | 2018 |
| Circonomy Limited | Professional & scientific | 2021 |
| Circuitswop Ltd | Other services | 2026 |
| Circular Refining and Products Company Ltd | Manufacturing | 2022 |
| Circular Resourcing Limited | Administrative & support | 2023 |
| Circular Road Services Limited | Professional & scientific | 2024 |
| Circular Vector Ltd | Wholesale & retail | 2025 |
| Circular-City C.I.C. | Professional & scientific | 2024 |
| CIRCULO7 Ltd | Professional & scientific | 2018 |
| Circuloffice Limited | Administrative & support | 2026 |
| Circuloil Ltd | Professional & scientific | 2020 |
| Circum Facilities Limited | Administrative & support | 2022 |
| Circumcisions Newcastle Ltd | Health & social care | 2024 |
| Circumetrics Limited | Professional & scientific | 2025 |
| Circumwise Limited | Health & social care | 2023 |
| Cirl Holdings Limited | Administrative & support | 2009 |
| Cirl UK Holdings Limited | Administrative & support | 2019 |
| Cirql Works Ltd | Manufacturing | 2025 |
| Cirres Limited | Information & communication | 2018 |
| Cirro-Pure Ltd | Professional & scientific | 2025 |
| Cirrostratus 3 Limited | Financial services | 2023 |
| Cirrus Arbor Limited | Information & communication | 2023 |
| Cirrusonline Limited | Information & communication | 2012 |
| Cirrussphere Ltd | Information & communication | 2024 |
| CIS Tech Limited | Information & communication | 2018 |
| Cisive International Holdings, Ltd. | Financial services | 2018 |
| Cisive, Ltd. | Administrative & support | 2017 |
| Citabok Ltd | Education | 2017 |
| Citadel Collective Limited | Administrative & support | 2022 |
| Citadel Cybersecurity Ltd | Administrative & support | 2020 |
| Citadel Estates Limited | Real estate | 2021 |
| Citadel Investment Group Limited | Real estate | 2024 |
| Citadelle Properties Limited | Real estate | 2023 |
| Citaition Ltd | Information & communication | 2026 |
| Citation Plant Ltd | Administrative & support | 2025 |
| Citation Verification Limited | Extraterritorial | 2026 |
| Citcon UK Limited | Financial services | 2020 |
| Citech Project Services Limited | Professional & scientific | 2019 |
| Citi Blooms Ltd | Administrative & support | 2014 |
| Citi Garage Limited | Wholesale & retail | 2024 |
| Citi Living Investments Ltd | Other services | 2025 |
| Citispeed Homes Ltd | Real estate | 2023 |
| Citispeed Recruitment Solutions Ltd | Administrative & support | 2024 |
| Citizen Advise Bureau for Overseas Pakistanis Ltd | Professional & scientific | 2023 |
| Citizen Facilities Limited | Wholesale & retail | 2021 |
| Citizens Advice Manchester | Other services | 1992 |
| Citizens Advice Sort Group Ltd | Other services | 2012 |
| Citra Content Ltd | Professional & scientific | 2019 |
| Citrine Footwear Limited | Wholesale & retail | 2014 |
| Citrine Holdings Ltd | Real estate | 2025 |
| Citrine Petroleum Company Ltd | Wholesale & retail | 2025 |
| Citrine Property Holdings Ltd | Real estate | 2026 |
| Citrine Property Partners Ltd | Real estate | 2026 |
| Citrine Sterling Limited | Professional & scientific | 2026 |
| Citrus Organisation Limited | Professional & scientific | 2024 |
| Citrushawk Limited | Real estate | 2026 |
| City Abode Ltd | Real estate | 2019 |
| City Air Express (N.I.) Ltd. | Transport & logistics | 1990 |
| City Airport Limited | Transport & logistics | 2004 |
| City Appliances Ltd | Wholesale & retail | 2023 |
| City Autos Bamford Limited | Wholesale & retail | 2023 |
| City Break Property Management Ltd | Real estate | 2025 |
| City Capital & Investments Limited | Financial services | 2017 |
| City Car ( MCR) Ltd | Wholesale & retail | 2025 |
| City Care Limited | Water & waste | 2018 |
| City Celebrates Limited | Hospitality | 2024 |
| City Centre Hotels Feeder Fund LP | | 2008 |
| City Centre Logistics Ltd | Transport & logistics | 2025 |
| City Centre Maintenance MCR Ltd | Construction | 2020 |
| City Centric Limited | Real estate | 2001 |
| City Comfort Luxury Apartments Ltd | Real estate | 2019 |
| City Commercial Limited | Real estate | 1995 |
| City Convenience Store Ltd | Wholesale & retail | 2025 |
| City Corporate Nominees Limited | Extraterritorial | 1996 |
| City Cuts Ltd | Other services | 2025 |
| City Dolphin Serviced Accommodation Ltd | Hospitality | 2026 |
| City E Scape Manchester Limited | Real estate | 2014 |
| City Edge (Management) Company Limited | Households | 2004 |
| City Empire UK Ltd | Real estate | 2018 |
| City Estates (MCR) Limited | Real estate | 2015 |
| City Events & Productions Ltd | Information & communication | 2023 |
| City Festivals Ltd | Wholesale & retail | 2021 |
| City First Property Management Ltd | Real estate | 2023 |
| City Flex Rentals Ltd | Administrative & support | 2024 |
| City Football Group (Midco) Limited | Financial services | 2022 |
| City Football Group Limited | Financial services | 2013 |
| City Football Investments Limited | Financial services | 2020 |
| City Football Marketing Limited | Arts & recreation | 2013 |
| City Football Services Limited | Arts & recreation | 2013 |
| City Football Treasury Management Limited | Real estate | 2009 |
| City Football U.K. Holdings 2 Limited | Financial services | 2025 |
| City Football U.K. Holdings Limited | Financial services | 2017 |
| City FOX Investments Limited | Wholesale & retail | 2021 |
| City Gate Management Company Limited | Households | 2001 |
| City Glass(Manchester)Co. Limited | Manufacturing | 1999 |
| City Go Ltd | Administrative & support | 2018 |
| City Heaven Suites Ltd | Real estate | 2025 |