| Shoponix Ltd | | | tax violations | 2022 | UK-HMRC | £180,101 |
| Shri Ram Property & Management Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,450 |
| Shrigleys Limited | | | tax violations | 2016 | UK-HMRC | £39,435 |
| Shulman & Company | | | accounting fraud or deficiencies | 2019 | UK-ICAEW | £5,000 |
| Siasa Telecom Ltd fka Executive Tools | | | tax violations | 2022 | UK-HMRC | £710,671 |
| Sibo Pakuotes UAB | | | tax violations | 2020 | UK-HMRC | £78,707 |
| Sicher Properties Ltd | | | tax violations | 2018 | UK-HMRC | £41,319 |
| SID Trading Limited | | | tax violations | 2021 | UK-HMRC | £147,314 |
| Sigma Broking Ltd. | | | investor protection violation | 2022 | UK-FCA | £531,000 |
| Silver Beach Hotel Ltd | | | tax violations | 2019 | UK-HMRC | £25,124 |
| Silver Bullet Petroleum Consultants Limited | | | tax violations | 2016 | UK-HMRC | £17,953 |
| Silverhill | | | tax violations | 2022 | UK-HMRC | £46,159 |
| Silverkey Property Management LLP EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,100 |
| Silvermask Ltd | | | tax violations | 2023 | UK-HMRC | £16,102,000 |
| Simla Restaurant Limited | | | tax violations | 2019 | UK-HMRC | £40,390 |
| Simon Lee Gallery Ltd AMP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £15,600 |
| Simon Nicholas Associates Ltd | | | tax violations | 2017 | UK-HMRC | £15,380 |
| Simon Silver-Myer | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £0 |
| Simone Food and Wine Ltd | | | tax violations | 2019 | UK-HMRC | £12,312 |
| Simply Move Estate And Lettings Management Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £4,500 |
| Simply Move Estate And Lettings Management Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £4,500 |
| Simply Plant Sales Limited fka Slater Haringthwaite Limited | | | tax violations | 2024 | UK-HMRC | £2,959,474 |
| Simpson West Estate Agents Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £26,700 |
| Sina Grupa Ltd (Trading as ‘Anni’s’) | | | tax violations | 2023 | UK-HMRC | £25,254 |
| Singh MM Ltd | | | tax violations | 2023 | UK-HMRC | £36,172 |
| Singh's Convenience Stores Ltd | | | tax violations | 2017 | UK-HMRC | £15,072 |
| Singham Construction Ltd | | | tax violations | 2018 | UK-HMRC | £31,598 |
| Sixonethreeone Limited | | | accounting fraud or deficiencies | 2014 | UK-FRC | £450,000 |
| Sixteen Real Estate (Industrial) Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,300 |
| Sixteen Real Estate (Retail) Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,850 |
| Sizzlers | | | tax violations | 2019 | UK-HMRC | £36,814 |
| SJ Inventure Ltd dba Lower Bevendean Off Licence, Newsagent, Grocery | | | tax violations | 2022 | UK-HMRC | £20,338 |
| SJS Property Group Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,350 |
| SK Property Group Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,525 |
| Skelwith Leisure (Raithwaite) Ltd | | | tax violations | 2017 | UK-HMRC | £4,493,791 |
| Skol Ltd | | | tax violations | 2019 | UK-HMRC | £21,540 |
| Sky Home Solutions Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,250 |
| Skymeadow Gallery Limited AMP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,450 |
| Skyon Ltd TCSP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,650 |
| Slaterchristiholdings Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,950 |
| SlaveDriver | | | tax violations | 2018 | UK-HMRC | £143,212 |
| Slices | | | tax violations | 2022 | UK-HMRC | £39,351 |
| Slobrasil Limited | | | tax violations | 2021 | UK-HMRC | £251,177 |
| Slok Interiors Limited | | | tax violations | 2021 | UK-HMRC | £22,541 |
| SLP Accountancy Ltd ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,650 |
| Slrbrighton Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £1,450 |
| Smart Chaps Male Grooming | | | tax violations | 2024 | UK-HMRC | £15,307 |
| Smart Construction and Civil Engineering Limited dba Smart Plant Limited | | | tax violations | 2018 | UK-HMRC | £710,495 |
| Smart Lettings Luton Limited ASP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,700 |
| Smart Move Sales And Lettings Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £1,250 |
| Smart Price Bristol Ltd | | | tax violations | 2022 | UK-HMRC | £130,762 |
| Smart Property Central Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,631 |
| Smiley's Plaice | | | tax violations | 2020 | UK-HMRC | £18,749 |
| Smiling Property Services Ltd | | | tax violations | 2018 | UK-HMRC | £41,031 |
| Smith & Williamson LLP | | | accounting fraud or deficiencies | 2019 | UK-ICAEW | £4,325 |
| Smith Construction Specialists Limited | | | tax violations | 2019 | UK-HMRC | £41,757 |
| Smithdown Fast Food Ltd | | | tax violations | 2018 | UK-HMRC | £31,636 |
| Smiths Accountancy Administration Services Ltd ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £3,300 |
| SMP Support Services Ltd. fka M8 Recruitment Ltd. | | | tax violations | 2023 | UK-HMRC | £1,411,692 |
| SMS Autos | | | tax violations | 2018 | UK-HMRC | £13,746 |
| SMT Food Limited (Formerly trading as ‘The Rib Shack’) | | | tax violations | 2023 | UK-HMRC | £35,300 |
| SMZ South Ltd dba Ashoka Ashton Lane | | | tax violations | 2019 | UK-HMRC | £15,992 |
| SNL Consulting Limited | | | tax violations | 2018 | UK-HMRC | £23,196 |
| Snowflakes Dessert Bar & Deli | | | tax violations | 2023 | UK-HMRC | £50,142 |
| Snowland Leisure Group Ltd | | | tax violations | 2019 | UK-HMRC | £50,026 |
| Sobell Rhodes LLP | | | accounting fraud or deficiencies | 2023 | UK-ICAEW | £3,500 |
| Societe Generale | Societe Generale | financial services | investor protection violation | 2010 | UK-FSA | £1,575,000 |
| Soho Bars (London) Limited dba The O Bar dba Freedom | | | tax violations | 2016 | UK-HMRC | £34,828 |
| Solak Trading Limited dba Sol Catering Consultancy | | | tax violations | 2017 | UK-HMRC | £24,956 |
| Sole Exclusive Ltd | | | tax violations | 2021 | UK-HMRC | £57,827 |
| Solihull Financial Services Limited | | | tax violations | 2023 | UK-HMRC | £43,569 |
| Sollazzos Properties Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £1,350 |
| Solomon New Homes International Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £43,075 |
| Somerston & Co Limited ASP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,500 |
| Somexchange Ltd | | | anti-money-laundering deficiencies | 2020 | UK-HMRC | £0 |
| Sonali Bank (UK) Limited | | | anti-money-laundering deficiencies | 2016 | UK-FCA | £3,250,600 |
| Sosia Constructions UK Ltd | | | tax violations | 2019 | UK-HMRC | £454,201 |
| Soul Estates Limited EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,750 |
| Source Software Ltd | | | tax violations | 2022 | UK-HMRC | £43,676 |
| South Cornelly Services | | | tax violations | 2017 | UK-HMRC | £18,735 |
| South-hams Book-Keeping & Payroll Services Limited ASP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £3,700 |
| Southern Construction Group Ltd | | | tax violations | 2023 | UK-HMRC | £13,719 |
| Southwell, Tyrrell & Co | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £6,315 |
| Sowerby FRS LLP | | | accounting fraud or deficiencies | 2021 | UK-ICAEW | £2,100 |
| SP Sales & Lettings Ltd EAB | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £2,750 |
| Spain Brothers & Co | | | accounting fraud or deficiencies | 2016 | UK-ICAEW | £2,000 |
| Spar | | | tax violations | 2024 | UK-HMRC | £49,654 |
| Spar West Cross Ltd franchise of Spar | | | tax violations | 2017 | UK-HMRC | £14,472 |
| Sparemytime Limited ASP | | | anti-money-laundering deficiencies | 2023 | UK-HMRC | £5,900 |
| Sparrowapp Ltd | | | tax violations | 2024 | UK-HMRC | £48,732 |
| Spartan Midlands Limited | | | tax violations | 2017 | UK-HMRC | £183,001 |
| Speakman & Parmar Limited AMP | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £12,500 |
| Specialist Cars of Malton Limited | | | tax violations | 2021 | UK-HMRC | £112,432 |
| Specialist Computer Services Limited | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £0 |
| Specialist Solutions plc | | | investor protection violation | 2011 | UK-FSA | £35,000 |
| Specmar Ltd dba Morrell Offshore Services Ltd. | | | tax violations | 2017 | UK-HMRC | £27,772 |
| Spectrum Contracting Services Ltd | | | tax violations | 2018 | UK-HMRC | £1,408,429 |
| Spencer Jakeman Property Management Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £14,500 |
| Sperrin Restaurant | | | tax violations | 2018 | UK-HMRC | £19,892 |
| Spice Aroma | | | tax violations | 2018 | UK-HMRC | £21,513 |
| Spice Brasserie (Trimdon) Ltd | | | tax violations | 2018 | UK-HMRC | £23,619 |
