| Carine Consultants (UK) Limited | Administrative & support | 2017 |
| Caring and Living Limited | Health & social care | 2015 |
| Caring for Life | Hospitality | 2017 |
| Caring for Life Properties Limited | Real estate | 1988 |
| Caring for Life Trading Limited | Wholesale & retail | 1992 |
| Caring Partnership Ltd | Health & social care | 2012 |
| Caring Together in Woodhouse & Little London | Health & social care | 2010 |
| Carissimi Ltd | Administrative & support | 2013 |
| Caritas Learning Ltd | Education | 2016 |
| Carl Feehan Electrical Limited | Construction | 2017 |
| Carl Finnell Fireplaces Ltd | Administrative & support | 2013 |
| Carl's Personal Training Services Limited | Arts & recreation | 2002 |
| Carlac Group Holdings Limited | Extraterritorial | 1973 |
| Carlac Group Limited | Professional & scientific | 2004 |
| Carlac Limited | Wholesale & retail | 1969 |
| Carlebe Ltd | Professional & scientific | 2018 |
| Carleton Lodge Developments Limited | Construction | 2020 |
| Carleton Mill RTM Company Limited | Households | 2011 |
| Carlex Estates,Limited | Financial services | 1946 |
| Carlex Properties Ltd | Real estate | 2024 |
| Carlos CRO Holdings Limited | Financial services | 2026 |
| Carlos Invesco LLP | | 2022 |
| Carlos Properties (Leeds) Limited | Real estate | 2017 |
| Carlos Superstores Limited | Real estate | 1986 |
| Carls Comps Ltd | Administrative & support | 2025 |
| Carlton Boarding Kennels Limited | Other services | 2016 |
| Carlton Court Investments Limited | Professional & scientific | 2014 |
| Carlton Garage Limited | Transport & logistics | 2007 |
| Carlton Gardens Ltd | Health & social care | 2026 |
| Carlton Green Management Company Limited | Households | 2015 |
| Carlton Hill Development Ltd | Real estate | 2020 |
| Carlton Hill Holdings Ltd | Real estate | 2020 |
| Carlton Hill Holdings NO 2 Limited | Real estate | 2021 |
| Carlton Hill Holdings NO 3 Limited | Real estate | 2021 |
| Carlton Hill Holdings NO 4 Limited | Real estate | 2021 |
| Carlton Hill Holdings NO 5 Limited | Real estate | 2021 |
| Carlton Lane Management Company Limited | Households | 2000 |
| Carlton Manor Holdings Limited | Hospitality | 2020 |
| Carlton Manor Weddings Limited | Financial services | 2020 |
| Carlton Terrace (Yeadon) Management Co Limited | Households | 2018 |
| Carltonandwood Limited | Real estate | 2022 |
| Carly Walter Coaching and Consultancy Limited | Health & social care | 2024 |
| Carma Consultancy Ltd | Information & communication | 2017 |
| Carma Limited | Administrative & support | 1994 |
| Carmelo Corallo Limited | Health & social care | 2026 |
| Carmens Properties Ltd | Real estate | 2022 |
| Carmina Entertainment & Events Ltd | Arts & recreation | 2024 |
| Carmona UK Limited | Professional & scientific | 1994 |
| Carnegie Electrical Testing Ltd | Professional & scientific | 2015 |
| Carnegie Joinery Services Limited | Construction | 2018 |
| Carnell Group Holdings Limited | Financial services | 2016 |
| Carnell Management Services Limited | Professional & scientific | 1999 |
| Carnell Support Services Limited | Construction | 1993 |
| Carnival Import Ltd. | Wholesale & retail | 2018 |
| Caro Logistics Ltd | Transport & logistics | 2026 |
| Carol Carson Associates Limited | Professional & scientific | 2009 |
| Carol M. Amery MD. Limited | Health & social care | 2023 |
| Carol Saunders Swim School Ltd | Education | 2012 |
| Carol Stevens Homes Ltd | Real estate | 2022 |
| Carolco UK Limited | Transport & logistics | 2008 |
| Carolmap Care Limited | Health & social care | 2014 |
| Carols Confectioners Limited | Hospitality | 2025 |
| Caroste Property Limited | Real estate | 2017 |
| Carpat Haulage Ltd | Transport & logistics | 2018 |
| Carpat Transport Management Ltd | Transport & logistics | 2024 |
| Carpatica Leeds Ltd | Wholesale & retail | 2021 |
| Carpe Diem Enterprise Ltd | Administrative & support | 2021 |
| Carpe Diem Media Productions Limited | Information & communication | 2016 |
| Carpenter Pubs Ltd | Hospitality | 2024 |
| Carpentry and Joinery Conservation Ltd | Construction | 2024 |
| Carpet Care CFS Ltd | Administrative & support | 2019 |
| Carpet Choices (Yorkshire) Ltd | Wholesale & retail | 2021 |
| Carpet Collection Leeds Limited | Wholesale & retail | 2024 |
| Carpet Direct Shipley Ltd | Wholesale & retail | 2024 |
| Carpet Heaven Limited | Wholesale & retail | 2005 |
| Carpet Home Furnishing UK Ltd | Wholesale & retail | 2026 |
| Carpet Services Limited | | 1988 |
| Carpet Trader ( Cross Gate) Limited | Wholesale & retail | 2011 |
| Carpets & Flooring (Leeds) Limited | Wholesale & retail | 2015 |
| Carpets to YOU (Leeds) Limited | Wholesale & retail | 2025 |
| Carpi Distributions Ltd | Wholesale & retail | 2025 |
| Carr Holdings Limited | Financial services | 2021 |
| Carr Manor Support Services Limited | Administrative & support | 2022 |
| Carr Mills Metal Works Ltd | Manufacturing | 2025 |
| Carradice Consulting Ltd | Information & communication | 2014 |
| Carrdoon Limited | Agriculture & fishing | 2013 |
| Carrington Consultancy Services Limited | Professional & scientific | 2022 |
| Carringtons KBB Limited | Wholesale & retail | 2018 |
| Carrot - Positive Motivation Ltd | Professional & scientific | 2018 |
| Carrot Juice Limited | Arts & recreation | 2002 |
| Carrside Animal Health Limited | Wholesale & retail | 2022 |
| Carrsted Construction Services Limited | Wholesale & retail | 2020 |
| Carruthers Collective Limited | Professional & scientific | 2025 |
| Carry Cargo Group Limited | Financial services | 2020 |
| Carry Cargo International Limited | Transport & logistics | 1997 |
| Cars 4 Cash (Leeds) Limited | Wholesale & retail | 2024 |
| Carsal Properties Ltd | Real estate | 2023 |
| Carsden UK Trucks Limited | Arts & recreation | 2017 |
| Carstar (Leeds) Limited | Wholesale & retail | 2004 |
| Carston Limited | Real estate | 2022 |