| C E Mechanical Services | | | tax violations | 2019 | UK-HMRC | £108,292 |
| C H London Limited | | | accounting fraud or deficiencies | 2017 | UK-ICAEW | £3,000 |
| C M Simplified Solutions Ltd | | | tax violations | 2023 | UK-HMRC | £46,471 |
| C Mann Construction Limited | | | tax violations | 2022 | UK-HMRC | £850,781 |
| C.J. Lucking & Co | | | accounting fraud or deficiencies | 2018 | UK-ICAEW | £1,000 |
| C.J. Pizza Limited dba Lonestar Pizza | | | tax violations | 2020 | UK-HMRC | £49,169 |
| C.J.M Tiling Ltd | | | tax violations | 2017 | UK-HMRC | £90,154 |
| C5 Clothing | | | tax violations | 2021 | UK-HMRC | £15,572 |
| Cadwallader & Co LLP | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £2,856 |
| Cafe 96 | | | tax violations | 2019 | UK-HMRC | £23,539 |
| Cafe Cod | | | tax violations | 2019 | UK-HMRC | £212,430 |
| Cafe Jeera Ltd | | | tax violations | 2018 | UK-HMRC | £54,825 |
| Cafe TJ Limited | | | tax violations | 2019 | UK-HMRC | £15,863 |
| Cafe Zoot Limited | | | tax violations | 2020 | UK-HMRC | £1,340,674 |
| Cakes and Bakes | | | tax violations | 2017 | UK-HMRC | £32,234 |
| Calicon and Associates | | | accounting fraud or deficiencies | 2018 | UK-ICAEW | £1,000 |
| Cam 3228 Ltd | | | tax violations | 2021 | UK-HMRC | £24,324 |
| Camac Engineering Ltd | | | tax violations | 2019 | UK-HMRC | £64,660 |
| Camden Kebab Ltd dba Real Taste | | | tax violations | 2018 | UK-HMRC | £78,475 |
| Cameron & Associates Ltd | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £1,292 |
| Canal View Bus Café Limited | | | tax violations | 2023 | UK-HMRC | £39,799 |
| Canara Bank | | | anti-money-laundering deficiencies | 2018 | UK-FCA | £896,100 |
| Candy Restaurant | | | tax violations | 2016 | UK-HMRC | £24,288 |
| Canim Fruit and Veg (Sheffield) Limited | | | tax violations | 2019 | UK-HMRC | £38,925 |
| Cannards Well Limited | | | tax violations | 2019 | UK-HMRC | £37,844 |
| Canuta Interiors Ltd | | | tax violations | 2023 | UK-HMRC | £108,856 |
| CAP Accountancy Limited | | | accounting fraud or deficiencies | 2020 | UK-ICAEW | £700 |
| CAP10 Limited dba Indian Palace Takeaway | | | tax violations | 2018 | UK-HMRC | £27,716 |
| Capital Bookkeeping Services Limited ASP | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £1,500 |
| Capital Impex Ltd | | | tax violations | 2021 | UK-HMRC | £257,029 |
| Capital Solutions Limited | | | investor protection violation | 2017 | UK-GFSC | £0 |
| Cappawhite Plant Hire Ltd | | | tax violations | 2017 | UK-HMRC | £32,464 |
| Carbon Technologies Group PLC | | | tax violations | 2018 | UK-HMRC | £19,174 |
| Care Asset Management Limited | | | investor protection violation | 2013 | UK-FSA | £56,000 |
| Caribbean Legal Services Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £11,347 |
| Carillion plc | | | investor protection violation | 2022 | UK-FCA | £0 |
| Carlane Construction Ltd | | | tax violations | 2019 | UK-HMRC | £69,389 |
| Carmarthen Construction Ltd | | | tax violations | 2017 | UK-HMRC | £21,044 |
| Carndale Enterprises Ltd | | | tax violations | 2017 | UK-HMRC | £940,429 |
| Carr's BK Ltd | | | tax violations | 2019 | UK-HMRC | £105,395 |
| Carter Backer Winter LLP | | | accounting fraud or deficiencies | 2020 | UK-ICAEW | £3,986 |
| Carter Backer Winter LLP | | | accounting fraud or deficiencies | 2016 | UK-ICAEW | £4,368 |
| Carter Nicholls Limited | | | accounting fraud or deficiencies | 2017 | UK-ICAEW | £3,443 |
| Carter Oliver Property Experts Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £3,200 |
| Cartier Property Management Ltd | | | tax violations | 2018 | UK-HMRC | £119,128 |
| Cartwrights Audit Limited | | | accounting fraud or deficiencies | 2019 | UK-ICAEW | £500 |
| Caterers Friend Limited | | | tax violations | 2014 | UK-HMRC | £55,771 |
| Caterina Belluardo Ltd | | | tax violations | 2020 | UK-HMRC | £19,925 |
| Caterpak Limited | | | tax violations | 2020 | UK-HMRC | £59,389 |
| Cathay International Holdings Limited | | | investor protection violation | 2019 | UK-FCA | £411,000 |
| Caver Global Sp zoo | | | tax violations | 2022 | UK-HMRC | £14,754 |
| Caversham Browne Limited | | | tax violations | 2017 | UK-HMRC | £17,605 |
| Cavu Corporate Finance Limited | | | accounting fraud or deficiencies | 2018 | UK-ICAEW | £1,284 |
| Cayenes Ltd | | | tax violations | 2023 | UK-HMRC | £74,062 |
| CB Contracts | | | tax violations | 2017 | UK-HMRC | £37,412 |
| cba (Accountants) Limited | | | accounting fraud or deficiencies | 2017 | UK-ICAEW | £10,653 |
| CCS Nationwide Limited TCSP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £3,657 |
| Cece Cornwall Ltd dba Funky's | | | tax violations | 2019 | UK-HMRC | £32,088 |
| Ceil Private Limited dba Ashoka Southside | | | tax violations | 2019 | UK-HMRC | £23,027 |
| Ceiling Form Ltd | | | tax violations | 2017 | UK-HMRC | £60,694 |
| Celebrations Express Limited | | | tax violations | 2020 | UK-HMRC | £46,058 |
| Celtic Carriers Limited | | | tax violations | 2016 | UK-HMRC | £318,408 |
| Cenkos Securities Plc | | | investor protection violation | 2016 | UK-FCA | £530,500 |
| Cent Furniture Limited | | | tax violations | 2023 | UK-HMRC | £128,598 |
| Certes Capital Limited (formerly Marlborough Pension Trustees Limited) | | | investor protection violation | 2019 | UK-GFSC | £0 |
| CGS Site Services Ltd | | | tax violations | 2018 | UK-HMRC | £519,814 |
| Chadico Limited dba Mia Lounge | | | tax violations | 2016 | UK-HMRC | £435,129 |
| Chambers Nottm Ltd | | | tax violations | 2018 | UK-HMRC | £364,647 |
| Chameleon Consultants Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £2,850 |
| Champy's Restaurant Ltd | | | tax violations | 2019 | UK-HMRC | £42,237 |
| Chandley Robinson Ltd | | | anti-money-laundering deficiencies | 2020 | UK-ICAEW | £4,200 |
| Changeable Eyewear Ltd | | | tax violations | 2019 | UK-HMRC | £37,039 |
| Changtel Solutions UK Ltd dba Enta Technologies Ltd. | | | tax violations | 2017 | UK-HMRC | £501,137 |
| Chantrey Vellacott | | | accounting fraud or deficiencies | 2018 | UK-ICAEW | £3,980 |
| Chantrey Vellacott DFK LLP | | | accounting fraud or deficiencies | 2016 | UK-ICAEW | £41,805 |
| Charles Alexander & Co Limited | | | accounting fraud or deficiencies | 2019 | UK-ICAEW | £1,000 |
| Charles Schwab UK Ltd. | Charles Schwab Corp. | financial services | investor protection violation | 2020 | UK-FCA | £8,963,200 |
| Charlie Chan's | | | tax violations | 2018 | UK-HMRC | £69,148 |
| Charlie Chans | | | tax violations | 2019 | UK-HMRC | £85,193 |
| Charlie Chans | | | tax violations | 2019 | UK-HMRC | £42,352 |
| Charlotte Bradley Transport Ltd | | | tax violations | 2016 | UK-HMRC | £12,877 |
| Charterhouse (Accountants) Limited | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £5,000 |
| Charterhouse (Accountants) Limited | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £1,000 |
| Chase de Vere Independent Financial Advisers Limited | Swiss Life Group | financial services | investor protection violation | 2014 | UK-FCA | £560,000 |
| Chawla and Gulati Property Investments Ltd | | | tax violations | 2018 | UK-HMRC | £10,666 |
| Cheesmans | | | accounting fraud or deficiencies | 2022 | UK-ICAEW | £145,000 |
| Chelepis Watson Limited | | | accounting fraud or deficiencies | 2022 | UK-ICAEW | £4,162 |
| Chelepis Watson Limited | | | accounting fraud or deficiencies | 2023 | UK-ICAEW | £2,600 |
| Chelsea House Hotel | | | tax violations | 2018 | UK-HMRC | £16,925 |
| Chen Li Limited dba China Garden | | | tax violations | 2016 | UK-HMRC | £61,578 |
| Cheney & Co. | | | accounting fraud or deficiencies | 2023 | UK-ICAEW | £10,000 |
| Cheng Du Buckingham Ltd | | | tax violations | 2018 | UK-HMRC | £24,239 |
| Chennai Chutney Ltd | | | tax violations | 2018 | UK-HMRC | £17,379 |
| Cheshire Mortgage Corporation Limited | | | mortgage abuses | 2012 | UK-FSA | £1,225,000 |
| CHG Holdings Ltd | | | tax violations | 2022 | UK-HMRC | £247,463 |
| Chickn Lickn Belfast Limited | | | tax violations | 2021 | UK-HMRC | £22,917 |
| Chicksand Gordon Avis Limited | | | accounting fraud or deficiencies | 2020 | UK-ICAEW | £5,000 |
| China City 7 Limited | | | tax violations | 2023 | UK-HMRC | £160,486 |
| China Exp Ltd | | | tax violations | 2019 | UK-HMRC | £24,974 |
| China K Ltd dba China King | | | tax violations | 2018 | UK-HMRC | £47,189 |
| Chinese Business Gazette Ltd | | | tax violations | 2019 | UK-HMRC | £14,558 |
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