| Crest Impex & Trading UK Ltd | Professional & scientific | 2025 |
| Crest Wills & Trusts Ltd | Other services | 2024 |
| Cresta Group Ltd | Hospitality | 2026 |
| Crestcon Ltd | Construction | 2025 |
| Crestmill Pharma Consultancy Limited | Professional & scientific | 2012 |
| Crestmont Global Limited | Wholesale & retail | 2025 |
| Crestplan Limited | Real estate | 2007 |
| Creststone Limited | Professional & scientific | 2025 |
| Creswell Investment Limited | Real estate | 2016 |
| Creswell Management Ltd | Real estate | 2016 |
| Creviii Limited | Professional & scientific | 2000 |
| Crhi Limited | Construction | 2018 |
| Cricketfields Flat Management Limited | Households | 1986 |
| Crimeshield Security Limited | Administrative & support | 2024 |
| Criminal Defence Specialists LLP | | 2014 |
| Crimson Construction Ltd | Construction | 2010 |
| Crimson Lynx Media Ltd | Administrative & support | 2023 |
| Crimson Sky Studio Ltd | Wholesale & retail | 2019 |
| Crin Pools Limited | Administrative & support | 2025 |
| Criq Ltd | Health & social care | 2025 |
| Crisadi Ltd | Transport & logistics | 2020 |
| Crisden Services Ltd | Construction | 2020 |
| Crisis Legal Limited | Financial services | 2019 |
| Crisis Resolve Limited | Financial services | 2017 |
| Crislo Construction Ltd | Construction | 2021 |
| Crismat Limited | Professional & scientific | 2019 |
| Crisp Properties Limited | Real estate | 2026 |
| Crispies Enterprises Ltd | Professional & scientific | 2022 |
| Cristel (London) Limited | Real estate | 1999 |
| Criticalriver Private Limited | Information & communication | 2020 |
| Crmm Ltd | Construction | 2025 |
| Croftmill Consultants Limited | Professional & scientific | 2012 |
| Crofton HR Solutions Ltd | Administrative & support | 2011 |
| Crofton Park Dental Practice Ltd | Health & social care | 2010 |
| Crofton Park Property Limited | Real estate | 2024 |
| Croftstone Developments Limited | Real estate | 2022 |
| Croftstone Investments Limited | Real estate | 2023 |
| Crois Capital Management Ltd | Other services | 2018 |
| Cromhall Limited | Real estate | 1998 |
| Cromia Limited | Professional & scientific | 2013 |
| Cromia Motor Services Limited | Administrative & support | 2025 |
| Cromo Management Company Limited | Households | 1997 |
| Cromwell Residences Limited | Hospitality | 2021 |
| Crosbies Holdings Limited | Financial services | 2025 |
| Cross Building Ltd | Construction | 2020 |
| Cross Connex Ltd | Administrative & support | 2011 |
| Cross Counties Equine Vets Ltd | Professional & scientific | 2024 |
| Cross Culture Cooks Limited | Hospitality | 2024 |
| Cross Excellence Limited | Wholesale & retail | 2017 |
| Cross Horizon Ltd | Construction | 2025 |
| Cross Residential Homes Limited | Real estate | 2020 |
| Cross Retail Limited | Wholesale & retail | 2011 |
| CROSS7 Limited | Hospitality | 2018 |
| CROSS7 Properties Ltd | Real estate | 2025 |
| Crossbind Limited | Administrative & support | 2000 |
| Crossmile Properties Limited | Real estate | 2016 |
| Crossways 1 Ltd | Administrative & support | 2021 |
| Crossways 2 Ltd | Administrative & support | 2021 |
| Crossways Dental Practice Limited | Health & social care | 2010 |
| Crossways Mansions Ltd | Households | 2020 |
| Crouch END Media Ltd | Information & communication | 2013 |
| Crouching Yeti Limited | Hospitality | 2023 |
| Crove Properties Limited | Real estate | 2013 |
| Crowded House Entertainments Limited | Arts & recreation | 2013 |
| Crown & Co Properties Limited | Real estate | 2025 |
| Crown Coast (Barking) Limited | Construction | 2017 |
| Crown Coast (Hertford) Limited | Construction | 2021 |
| Crown Coast (Plantagenet Road) Limited | Real estate | 2013 |
| Crown Coast (Romford) Limited | Construction | 2017 |
| Crown Coast (SE18) Limited | Construction | 2021 |
| Crown Coast (Woodford) Limited | Real estate | 2020 |
| Crown Coast Coulsdon Limited | Construction | 2020 |
| Crown Coast Living (Commercial Road) Limited | Real estate | 2018 |
| Crown Coast Property Limited | Construction | 2011 |
| Crown Equity Release Limited | Financial services | 2001 |
| Crown Holland Developments Limited | Construction | 2020 |
| Crown Partners Limited | Real estate | 2004 |
| Crown Property and Investments Ltd | Real estate | 2024 |
| Crown Service UK Limited | Professional & scientific | 2008 |
| Crown Tree Surgery Ltd | Professional & scientific | 2026 |
| Crowncoast Properties LLP | | 2014 |
| Crownelite Estates Ltd | Real estate | 2025 |
| Crownglen Commercial Limited | Construction | 2015 |
| Crownglen Limited | Construction | 2002 |
| Crownglen Putney Ltd | Real estate | 2026 |
| Crowning Greatness C.I.C. | Information & communication | 2022 |
| Crownline Black Ltd | Other services | 2026 |
| Crownstar Limited | Financial services | 2007 |
| Croxss Ltd | Wholesale & retail | 2026 |
| Croxxhatch Ltd | Wholesale & retail | 2019 |
| Croydon Private Hire Ltd | Other services | 2017 |
| CRT Accountants Ltd | Professional & scientific | 2024 |
| Crunchgates Limited | Other services | 2003 |
| Cruxton Investments Limited | Construction | 1990 |
| Cruz Creative Ltd | Information & communication | 2023 |
| Cryd Ltd | Transport & logistics | 2018 |
| Crylon Ltd | Other services | 2018 |
| Cryosculpture Ltd | Wholesale & retail | 2017 |
| Cryptical Web Studios Ltd | Information & communication | 2026 |
| Cryptomeria Ltd | Professional & scientific | 2013 |