| Selplas Ltd | | | tax violations | 2022 | UK-HMRC | £23,161 |
| Serco Geografix Ltd | Serco Group | miscellaneous services | fraud | 2019 | UK-SFO | £22,900,000 |
| Services A-Z Ltd | | | tax violations | 2022 | UK-HMRC | £316,602 |
| Sesame Limited | Aviva PLC | financial services | investor protection violation | 2014 | UK-FCA | £1,598,000 |
| Sesame Limited | Aviva PLC | financial services | investor protection violation | 2013 | UK-FCA | £6,031,200 |
| Sett Valley Insurance Services | | | investor protection violation | 2010 | UK-FSA | £28,000 |
| SFS (Oldham) Limited | | | tax violations | 2016 | UK-HMRC | £25,194 |
| SFYK Ltd | | | tax violations | 2017 | UK-HMRC | £97,324 |
| SG Euro Trades Ltd | | | tax violations | 2021 | UK-HMRC | £503,612 |
| SGI Builder Limited | | | tax violations | 2023 | UK-HMRC | £52,110 |
| Shaanz Peri Peri Bridgwater Ltd | | | tax violations | 2023 | UK-HMRC | £41,426 |
| Shabaaz Curry Cottage Limited dba Thai Elephant | | | tax violations | 2018 | UK-HMRC | £36,566 |
| Shacter Cohen & Bor LLP | | | accounting fraud or deficiencies | 2020 | UK-ICAEW | £17,551 |
| Shah Jalal Belfast Ltd | | | tax violations | 2018 | UK-HMRC | £15,277 |
| Shahi Raj Restaurant Ltd dba Shahi Raj Restaurant and Takeaway | | | tax violations | 2018 | UK-HMRC | £37,757 |
| Shahpron Limited dba Baburchi Cuisine | | | tax violations | 2019 | UK-HMRC | £36,027 |
| Shakun Subway Ltd franchise of Subway | | | tax violations | 2017 | UK-HMRC | £29,251 |
| Shampan of Cardigan Ltd | | | tax violations | 2019 | UK-HMRC | £25,229 |
| Shark 4 U | | | tax violations | 2020 | UK-HMRC | £54,332 |
| Sharman Fielding | | | accounting fraud or deficiencies | 2022 | UK-ICAEW | £2,935 |
| Sharman Fielding | | | accounting fraud or deficiencies | 2022 | UK-ICAEW | £17,912 |
| Sharmin Restaurants Limited dba L'Oud Des Eurasie | | | tax violations | 2019 | UK-HMRC | £51,539 |
| Shat Limited fka Fresh Almalaky | | | tax violations | 2022 | UK-HMRC | £25,568 |
| Shawty Trading Ltd | | | tax violations | 2019 | UK-HMRC | £304,184 |
| Sheena Knitwear (M/CR) Limited | | | tax violations | 2015 | UK-HMRC | £20,572 |
| Sheepridge Off Licence Limited dba Best One Xpress | | | tax violations | 2018 | UK-HMRC | £19,481 |
| Shelby Finance Limited | | | payday lending violation | 2020 | UK-CMA | £527,863 |
| Shelley Mumith & Co Limited ASP | | | anti-money-laundering deficiencies | 2021 | UK-HMRC | £1,420 |
| Shen Zhen Shi Bedi Shangmao You Xian Going S.I. dba CHanning56789 | | | tax violations | 2018 | UK-HMRC | £220,560 |
| Shen Zhen Shi Chuang jiahui Dian Zi Shang Wuyou Xian Gong Si | | | tax violations | 2019 | UK-HMRC | £22,108 |
| Shen Zhen Shi Hui Tang Ke Ji You Xian Gong Si dba buyftb | | | tax violations | 2018 | UK-HMRC | £54,375 |
| Shen Zhen Shi Shang Huang Shang Mao Company Limited dba Seeblue | | | tax violations | 2018 | UK-HMRC | £82,604 |
| Shen Zhen Si Mai Si Dian Zi Shang Wu You Xian Gong Si | | | tax violations | 2018 | UK-HMRC | £55,172 |
| Shenxhen Kumeida Technology Co Ltd dba Eonfinedirect UK | | | tax violations | 2018 | UK-HMRC | £49,397 |
| Shenzhen Aosihhui Technology Co. Ltd dba Aosihui UK | | | tax violations | 2018 | UK-HMRC | £48,618 |
| Shenzhen Qiao Zhuo E-Commerce Ltd | | | tax violations | 2019 | UK-HMRC | £1,411,508 |
| Shenzhen Qingaimin Consulting Ltd Company | | | tax violations | 2018 | UK-HMRC | £146,056 |
| Shenzhen Shi Chenghaoming Kejiyouxiangongsi | | | tax violations | 2019 | UK-HMRC | £95,900 |
| Shenzhen Tuoting Technology Co Ltd dba MicroYep UK | | | tax violations | 2021 | UK-HMRC | £381,501 |
| Shenzhen Youke Shangmao Co. Ltd | | | tax violations | 2019 | UK-HMRC | £143,339 |
| Shenzhen Yuanbei Technologies Co. Ltd | | | tax violations | 2019 | UK-HMRC | £259,497 |
| Shenzhen Zhuoer Photography Equipment Co Ltd dba Dcmall | | | tax violations | 2019 | UK-HMRC | £142,303 |
| Shenzhenishi Longhanfengyi Kejyouxiangongsi dba ZookkiDirectUK | | | tax violations | 2018 | UK-HMRC | £364,618 |
| Shenzhenshi Dongfang Sanrenxing Shiye Youxian Gongsi dba Gainwell UK | | | tax violations | 2018 | UK-HMRC | £25,636 |
| Shenzhenshi Youpicnchuang Shanmao Co Ltd | | | tax violations | 2018 | UK-HMRC | £17,604 |
| Shenzhenshi Yueyiyinshuayouxiangongsi dba Yueying | | | tax violations | 2020 | UK-HMRC | £279,484 |
| Shenzhenshihuahancaizhizhipin Baozhuangyouxiangongsi | | | tax violations | 2018 | UK-HMRC | £81,484 |
| Shenzhenshizengtuodianzi Shangwuyouxiangongsi | | | tax violations | 2020 | UK-HMRC | £85,048 |
| Sheppard & Co Limited | | | accounting fraud or deficiencies | 2018 | UK-ICAEW | £2,495 |
| Sheridans Ltd | | | anti-money-laundering deficiencies | 2018 | UK-HMRC | £3,553 |
| Sherwood Fish & Kebab House | | | tax violations | 2017 | UK-HMRC | £14,588 |
| Sherzi Exchange Limited MSB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £270,530 |
| Shift Financial Services Limited MSB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £15,350 |
| Shiny Bikes Ltd | | | tax violations | 2017 | UK-HMRC | £142,038 |
| Shipleys LLP | | | accounting fraud or deficiencies | 2016 | UK-ICAEW | £16,030 |
| Shipshape Restaurants Ltd | | | tax violations | 2018 | UK-HMRC | £17,114 |
| Shisha House Ltd | | | tax violations | 2017 | UK-HMRC | £52,378 |
| Shop it Again | | | tax violations | 2018 | UK-HMRC | £169,887 |
| Shoponix Ltd | | | tax violations | 2022 | UK-HMRC | £180,101 |
| 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 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 |
| 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 (Retail) Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £2,850 |
| Sizzlers | Associated British Foods | food products | tax violations | 2019 | UK-HMRC | £36,814 |
| SJ Inventure Ltd dba Lower Bevendean Off Licence, Newsagent, Grocery | | | tax violations | 2022 | UK-HMRC | £20,338 |
| 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 |
| 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 |
| Slrbrighton Limited EAB | | | anti-money-laundering deficiencies | 2022 | UK-HMRC | £1,450 |
| 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 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 |
| SMP Support Services Ltd. fka M8 Recruitment Ltd. | | | tax violations | 2023 | UK-HMRC | £1,411,692 |
