| Stationers Depot | | | tax violations | 2017 | UK-HMRC | £21,785 |
| State Street Bank Europe Limited and State Street Global Markets International Limited | State Street Corp. | financial services | investor protection violation | 2014 | UK-FCA | £22,885,000 |
| Star East 3 Limited (Formerly trading as ‘ Star East’) | | | tax violations | 2023 | UK-HMRC | £53,868 |
| Standard Life Assurance Limited | Phoenix Group Holdings PLC | financial services | investor protection violation | 2019 | UK-FCA | £30,792,500 |
| Standard Life Assurance Limited | Phoenix Group Holdings PLC | financial services | investor protection violation | 2010 | UK-FSA | £2,450,000 |
| Standard Chartered Trust (Guernsey) Limited | | | anti-money-laundering deficiencies | 2020 | UK-GFSC | £140,000 |
| Standard Chartered Bank | Standard Chartered | financial services | anti-money-laundering deficiencies | 2019 | UK-FCA | £102,163,200 |
| Standard Chartered Bank | Standard Chartered | financial services | economic sanction violation | 2020 | UK-OFSI | £20,471,810 |
| Standard Chartered Bank | Standard Chartered | financial services | internal controls deficiency | 2021 | UK-PRA | £46,550,000 |
| Standard Bank PLC | Industrial and Commercial Bank of China | financial services | anti-money-laundering deficiencies | 2014 | UK-FCA | £7,640,400 |
| Standard Bank Isle of Man Limited | | | anti-money-laundering deficiencies | 2022 | UK-IOM | £247,324 |
| Stampback Limited ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £8,200 |
| Stalwart Trading Ltd | | | tax violations | 2021 | UK-HMRC | £163,995 |
| Staffscanner Payroll Bureau Ltd fka Apollo Payroll Bureau Ltd | | | tax violations | 2023 | UK-HMRC | £990,703 |
| Stadium Investments | | | tax violations | 2020 | UK-HMRC | £48,169 |
| Stacey Mann Estates Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £26,400 |
| Stacey Mann Estates Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £26,400 |
| ST Takeaway Ltd dba Marmaris Kebab House | | | tax violations | 2019 | UK-HMRC | £115,721 |
| St John's Innovation Centre Ltd TCSP | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £15,000 |
| St Ermins Operating (UK) Ltd | | | anti-money-laundering deficiencies | 2020 | UK-HMRC | £0 |
| St Cyprian's Student Halls Limited | | | tax violations | 2019 | UK-HMRC | £20,636 |
| SSD Trading Limited | | | tax violations | 2017 | UK-HMRC | £383,594 |
| SS Traders Ltd | | | tax violations | 2019 | UK-HMRC | £643,103 |
| SS Leisure Limited | | | tax violations | 2016 | UK-HMRC | £19,228 |
| SS Euro Distribution | | | tax violations | 2021 | UK-HMRC | £13,322 |
| SRS (Sheffield) Limited | | | tax violations | 2016 | UK-HMRC | £518,734 |
| SRM Accountants Limited ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £4,500 |
| SRLV Audit Limited | | | accounting fraud or deficiencies | 2022 | UK-ICAEW | £20,260 |
| Sree Sai NI Ltd | | | tax violations | 2017 | UK-HMRC | £20,627 |
| Squarebrook Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £5,000 |
| Square Finance Limited ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,900 |
| SPW (UK) LLP | | | accounting fraud or deficiencies | 2016 | UK-ICAEW | £4,658 |
| Springroll Chen Limited dba Spring Roll Takeaway | | | tax violations | 2020 | UK-HMRC | £33,288 |
| Springfield Quay Ltd dba Ashoka at the Quay | | | tax violations | 2018 | UK-HMRC | £55,253 |
| Springers (Great Barr) Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £3,100 |
| Springer Homes Thanet Limited EAB | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £1,950 |
| Springburn Stores Ltd | | | tax violations | 2018 | UK-HMRC | £141,739 |
| Spri Limited | | | tax violations | 2023 | UK-HMRC | £53,334 |
| Spotlight Sales and Lettings LTD EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,900 |
| Splash Hot Hand Car Wash and Eurasia Market | | | tax violations | 2017 | UK-HMRC | £44,005 |
| Spice Touch Ltd dba Brecks | | | tax violations | 2019 | UK-HMRC | £22,572 |
| Spice of Life (EKCW) Ltd | | | tax violations | 2020 | UK-HMRC | £27,637 |
| Spice Brasserie (Trimdon) Ltd | | | tax violations | 2018 | UK-HMRC | £23,619 |
| Spice Aroma | | | tax violations | 2018 | UK-HMRC | £21,513 |
| Sperrin Restaurant | | | tax violations | 2018 | UK-HMRC | £19,892 |
| Spencer Jakeman Property Management Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £14,500 |
| Spectrum Contracting Services Ltd | | | tax violations | 2018 | UK-HMRC | £1,408,429 |
| Specmar Ltd dba Morrell Offshore Services Ltd. | | | tax violations | 2017 | UK-HMRC | £27,772 |
| Specialist Solutions plc | | | investor protection violation | 2011 | UK-FSA | £35,000 |
| Specialist Computer Services Limited | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £0 |
| Specialist Cars of Malton Limited | | | tax violations | 2021 | UK-HMRC | £112,432 |
| Speakman & Parmar Limited AMP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £12,500 |
| Spartan Midlands Limited | | | tax violations | 2017 | UK-HMRC | £183,001 |
| Spar West Cross Ltd franchise of Spar | | | tax violations | 2017 | UK-HMRC | £14,472 |
| Spain Brothers & Co | | | accounting fraud or deficiencies | 2016 | UK-ICAEW | £2,000 |
| Sowerby FRS LLP | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £2,100 |
| Southwell, Tyrrell & Co | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £6,315 |
| Southern Construction Group Ltd | | | tax violations | 2023 | UK-HMRC | £13,719 |
| South-hams Book-Keeping & Payroll Services Limited ASP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £3,700 |
| South Cornelly Services | | | tax violations | 2017 | UK-HMRC | £18,735 |
| Source Software Ltd | | | tax violations | 2022 | UK-HMRC | £43,676 |
| Soul Estates Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,750 |
| Sosia Constructions UK Ltd | | | tax violations | 2019 | UK-HMRC | £454,201 |
| Sonali Bank (UK) Limited | | | anti-money-laundering deficiencies | 2016 | UK-FCA | £3,250,600 |
| Somexchange Ltd | | | anti-money-laundering deficiencies | 2020 | UK-HMRC | £0 |
| Somerston & Co Limited ASP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,500 |
| Solomon New Homes International Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £43,075 |
| Sollazzos Properties Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £1,350 |
| Solihull Financial Services Limited | | | tax violations | 2023 | UK-HMRC | £43,569 |
| Sole Exclusive Ltd | | | tax violations | 2021 | UK-HMRC | £57,827 |
| Solak Trading Limited dba Sol Catering Consultancy | | | tax violations | 2017 | UK-HMRC | £24,956 |
| Soho Bars (London) Limited dba The O Bar dba Freedom | | | tax violations | 2016 | UK-HMRC | £34,828 |
| Societe Generale | Societe Generale | financial services | investor protection violation | 2010 | UK-FSA | £1,575,000 |
| Sobell Rhodes LLP | | | accounting fraud or deficiencies | 2023 | UK-ICAEW | £3,500 |
| Snowland Leisure Group Ltd | | | tax violations | 2019 | UK-HMRC | £50,026 |
| Snowflakes Dessert Bar & Deli | | | tax violations | 2023 | UK-HMRC | £50,142 |
| SNL Consulting Limited | | | tax violations | 2018 | UK-HMRC | £23,196 |
| SMZ South Ltd dba Ashoka Ashton Lane | | | tax violations | 2019 | UK-HMRC | £15,992 |
| SMT Food Limited (Formerly trading as ‘The Rib Shack’) | | | tax violations | 2023 | UK-HMRC | £35,300 |
| SMS Autos | | | tax violations | 2018 | UK-HMRC | £13,746 |
| SMP Support Services Ltd. fka M8 Recruitment Ltd. | | | tax violations | 2023 | UK-HMRC | £1,411,692 |
| Smithdown Fast Food Ltd | | | tax violations | 2018 | UK-HMRC | £31,636 |
| Smith Construction Specialists Limited | | | tax violations | 2019 | UK-HMRC | £41,757 |
| Smith & Williamson LLP | | | accounting fraud or deficiencies | 2019 | UK-ICAEW | £4,325 |
| Smiling Property Services Ltd | | | tax violations | 2018 | UK-HMRC | £41,031 |
| Smiley's Plaice | | | tax violations | 2020 | UK-HMRC | £18,749 |
| Smart Property Central Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,631 |
| Smart Price Bristol Ltd | | | tax violations | 2022 | UK-HMRC | £130,762 |
| Smart Lettings Luton Limited ASP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,700 |
| Smart Construction and Civil Engineering Limited dba Smart Plant Limited | | | tax violations | 2018 | UK-HMRC | £710,495 |
| Slrbrighton Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £1,450 |
| Slok Interiors Limited | | | tax violations | 2021 | UK-HMRC | £22,541 |
| Slobrasil Limited | | | tax violations | 2021 | UK-HMRC | £251,177 |
| Slices | | | tax violations | 2022 | UK-HMRC | £39,351 |
| SlaveDriver | | | tax violations | 2018 | UK-HMRC | £143,212 |
| Sky Home Solutions Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,250 |
| Skol Ltd | | | tax violations | 2019 | UK-HMRC | £21,540 |
| Skelwith Leisure (Raithwaite) Ltd | | | tax violations | 2017 | UK-HMRC | £4,493,791 |
| SJ Inventure Ltd dba Lower Bevendean Off Licence, Newsagent, Grocery | | | tax violations | 2022 | UK-HMRC | £20,338 |
| Sizzlers | | | tax violations | 2019 | UK-HMRC | £36,814 |
| Sixteen Real Estate (Retail) Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,850 |
