| SIXFIELDS AUTOCENTRE (MIDLANDS) LIMITED | Northampton | A rating |
| Sixfold Bioscience Limited | West London | A rating |
| SIXT Rent a Car Ltd | Slough | A rating |
| Sixteen Films Limited | London | A rating |
| Sixteen3 Limited | Warrington | A rating |
| Sixth Street Europe LLP | London | A rating |
| Sixways Builders Merchants Limited | Birmingham | A rating |
| SIYA GARDEN LIMITED | Birmingham | A rating |
| Siya Properties Limited T/A The Falcon Hotel | Farnborough | A rating |
| Siya Retail LTD | Leicester | A rating |
| SIYA SWEETMART LIMITED | MIDDLESEX | A rating |
| SIYA TECH VENTURES LTD | Harrow | A rating |
| SIYAMA KANNAN LTD T/A WEST VIEW ESSO | Bournemouth | A rating |
| Siyamala Vaakeesan T/A Mersea Island Supermarket | West Mersea | A rating |
| SIYANA LTD T/A SPICE HUT | Northampton | A rating |
| SIYARAJ LTD | Manchester | A rating |
| SIYAS ENTERPRISE LIMITED | Croydon | A rating |
| Size Group Services Ltd | London | A rating |
| Sizewell C Limited | London | A rating |
| SIZZLE & CREAM LIMITED | Greenock | A rating |
| Sizzle Creative Agency Limited | Bolton | A rating |
| SIZZLE IN GRILL LTD | Oldham | A rating |
| SIZZLER PERTH LTD | Perth | A rating |
| Sizzler Touch Limited | london | A rating |
| Sizzlord Ltd | Coventry | A rating |
| SJ Bargh limited | Lancaster | A rating |
| SJ Convenience Limited | Goole | A rating |
| SJ Convenience Store Limited | London | A rating |
| SJ DELIVERY SOLUTIONS LTD | Greater Manchester | A rating |
| SJ Electronics Limited | Kettering | A rating |
| SJ Fastfood Limited | London | A rating |
| SJ Inventure Limited | Brighton | A rating |
| Sj Motor Services Ltd | Oldham | A rating |
| SJ Motors Paisley Limited | Paisley | A rating |
| SJ Smith and Associates Dental Practice | whitehaven | A rating |
| SJ TRADING LTD | Birmingham | A rating |
| SJ. LESLIE LIMITED | Pwllheli | A rating |
| SJC FINANCE TEAM LTD | Radlett | A rating |
| SJC FUEL SERVICES LIMITED | Bournemouth, | A rating |
| SJC Glasgow Limited | Glasgow | A rating |
| SJC Hutchinson Engineering Ltd | Coleraine | A rating |
| SJC London LTD | London | A rating |
| SJC Retail Ltd | Dunstable | A rating |
| SJD Traders Ltd | Norwich | A rating |
| SJESTORE LTD | LONDON | A rating |
| SJF IMPERIUM CONSTRUCTION & ENGINEERING LIMITED | Slough | A rating |
| SJH Prosthetics Limited | Bolton | A rating |
| SJH Scientific Limited | Halse | A rating |
| SJISTIC LTD T/A issuebot.ai | Mildenhall | A rating |
| SJJ UK TRADING LTD T/A Bombay Quay | Northwich | A rating |
| SJK & SONS LTD | London | A rating |
| SJMG LTD | London | A rating |
| SJS (NI) Ltd | Maghera | A rating |
| SJS Flore Ltd t/a The White Hart | Northampton | A rating |
| SJS Holdings Ltd | Birmingham | A rating |
| SJSRM Limited T/A Serine Physio Clinic | Scarborough | A rating |
| SJTL SERVICES LIMITED | BARKING | A rating |
| SJV Group T/A Happy Journeys Day Nursery | London | A rating |
| SJVR LTD | Telford | A rating |
| SJW Orthodontics Ltd | London | A rating |
| SJW Property Management Limited | London | A rating |
| SK & Associates Ltd | Altrincham | A rating |
| SK 470 LTD T/A Little Istanbul | SOUTHALL | A rating |
| SK Accountants (MCR) Ltd | Manchester | A rating |
| SK ACCOUNTANTS AND TAX CONSULTANTS LTD | London | A rating |
| SK Associates Ltd | Hillingdon | A rating |
| SK BROS LOGISTICS LTD | Southampton | A rating |
| SK BROTHERS CARPETS AND FURNITURE LTD | BIRMINGHAM | A rating |
| SK Business Services Ltd | Leeds | A rating |
| SK BUY N BUY LTD | London | A rating |
| SK CATERING LTD | Wolverhampton | A rating |
| SK CHILLED FOODS | BILLINGHAM | A rating |
| SK DENTAL PRACTICE LIMITED | London | A rating |
| SK ECOPLANT CO., LTD | LONDON | A rating |
| SK Energy Europe Ltd | London | A rating |
| SK Enterprises London Ltd T/A IAUTO | Croydon | A rating |
| SK EXCEL DENTAL LTD | Todmorden | A rating |
| SK Fish Bar Ltd T/A Emilia's Fish Bar | Swansea | A rating |
| SK Foods | Stoke-On-Trent | A rating |
| SK Foods and Drinks Limited | Birmingham | A rating |
| SK FOODS GROUP LTD | Leicester | A rating |
| SK Foods LTD | Middlesex | A rating |
| SK Freight Services Ltd | Hounslow | A rating |
| SK GENERAL SERVICES LTD | LIVERPOOL | A rating |
| SK Gill Construction Ltd | Hayes | A rating |
| SK GROUP COURIERS LTD | Reading | A rating |
| SK HALAL FOOD LIMITED | High Wycombe | A rating |
| Sk Hynix Nand Product Solutions UK Limited (t/a Solidigm) | Swindon | A rating |
| SK HYNIX UK LIMITED | Weybridge | A rating |
| SK INFOSYSTEMS LTD | ROMFORD | A rating |
| SK IT SOLUTIONS LTD | London | A rating |
| SK Joinery Contracts Ltd | Swatragh | A rating |
| SK KNIGHTCARE LTD T/A EAST LEEDS PHARMACY | LEEDS | A rating |
| SK Legal & Security Limited | London | A rating |
| SK Maxx Ltd | Birmingham | A rating |
| SK Motoring Group Ltd | Luton | A rating |
| SK News | Lowestoft, Suffolk | A rating |
| SK Oldbury Ltd T/A Papa Johns | Coventry | A rating |
| SK PROTECTION LIMITED | Romford | A rating |
| SK RECRUITMENTS (LONDON) LTD | London | A rating |
| SK Sales & Construction LTD | London | A rating |
| SK SEASONS LTD | Hounslow | A rating |
| SK Security Services Ltd | Watford | A rating |
| SK Shaji Limited | Mid Glamorgan | A rating |
| SK SPORTS AND EDUCATION LIMITED | HULL | A rating |
| SK Tiptree Ltd | Colchester | A rating |
| SK UK FACILITIES LTD | London | A rating |
| SK UNIFORM LIMITED | TAMWORTH | A rating |
| SK WINE AND FOOD LIMITED T/A REENA'S | West Drayton | A rating |
| SK13 CONSTRUCTION LTD | Leicester | A rating |
| SK4 GARAGE LTD | Heaton Mersey | A rating |
| SKA FINANCIAL SERVICES LTD | Berkshire | A rating |
| SKA Group Ltd | Leeds | A rating |
| SKA MINI SUPERMARKET LIMITED | London | A rating |
| SKA MOTORS LONDON LTD | London | A rating |
| SKA Observatory | Macclesfield | A rating |
| SKA STARS LIMITED | Bradford | A rating |
| Skaar Investments Ltd | Mitcham | A rating |
| SKAAR Tech Ltd | Coventry | A rating |
| Skab Security Services Ltd | Barking | A rating |
| Skadden,Arps,Slate,Meagher & Flom (UK) LLP | London | A rating |
| SKAL Restaurants LTD TA SKAL Nordic Dining | London | A rating |
| Skanda Accountants Ltd | Watford | A rating |
| Skanda Hythe Ltd t/a Don Air, The Treats and The Cafe | HYTHE | A rating |
| Skanda Kutty Ltd TA Glebe Food And Wine | Uxbridge | A rating |
| Skanda News Limited | Leicester | A rating |
| Skanda Viva Limited | Northwich | A rating |
| Skandavel Webtech Private Limited | London | A rating |
| SkandiHus Ltd | London | A rating |
| Skandl Co. Limited T/A Skandl | London | A rating |
| Skanska UK Plc | Watford | A rating |
| Skara Holdings Limited | Aberdeen | A rating |
| SKARN ASSOCIATES LIMITED | Lichfield | A rating |
| SKAT Logistics Ltd | London | A rating |
| SKATAX LTD. | London | A rating |
| SKB GLASGOW LTD | Glasgow | A rating |
| SKB JOINERY AND BUILDING MANAGEMENT LTD | WINSFORD | A rating |
| Skb Kabila Ltd | Bristol | A rating |
| SKB Serenity Care Homes LTD | London | A rating |
| SKB Trading Limited | Essex | A rating |
| SKC Rock Ltd | Liskeard | A rating |
| SKC Services Ltd | Twickenham | A rating |
| SKC Studios Limited | Haverhill | A rating |
| SKD (PATRINGTON) LTD (Trading as SPAR) | HULL | A rating |
| SKDP UK Limited | Droitwich | A rating |
| SKE Engineering Limited | Milton Keynes | A rating |
| Skechers USA Ltd | St Albans | A rating |
| Skedulo UK LTD | Burnham | A rating |
| SKEELR LTD | London | A rating |
| Skegness Cricket Club | Skegness | A rating |
| Skegness Visionplus t/a Specsavers | Skegness | A rating |
| SKELLER FINANCIAL SERVICES LIMITED | LONDON | A rating |
| Skellern Doughty Limited | Prestwich | A rating |
| Skellow Dental Practice | Doncaster | A rating |
| SKELMANTHORPE CRICKET CLUB | HUDDERSFIELD | A rating |
| Skelmersdale Baptist Church | Skelmersdale | A rating |
| Skene Enterprises Aberdeen LTD | BANCHORY | A rating |
| Skerryvore Practice | Kirkwall | A rating |
| Sketch Creative Limited | Birmingham | A rating |
| Sketch London Architects | FARNHAM | A rating |
| Sketches Int Limited | London | A rating |
| Sketty and Killay Medical Centres | Swansea | A rating |
| Skewb Ltd | Warwick | A rating |
| Skewed Ltd | London | A rating |
| SKF (U.K.) Limited | Luton | A rating |
| SKH ENTERPRISE LTD t/a Phone Tech | Totnes | A rating |
| SKH Restaurants Ltd | Helensburgh | A rating |
| SKH Restaurants Ltd trading as Masala Twist | Helenburgh | A rating |
| SKH TRANSPORT LTD | LONDON | A rating |
| SKI TRADE LTD T/A BP | Taunton | A rating |
| Ski-Lifts Ltd | Manchester | A rating |
| Skibo Limited | Dornoch | A rating |
| Skidmore Owings & Merrill (Europe) LLP | London | A rating |
| Skiff Capital Advisors Limited | London | A rating |
| Skill Capital Group Limited | London | A rating |
| Skill Matrix Solutions Limited | Basingstoke | A rating |
| SKILL ME LTD | London | A rating |
| Skill Plus Consultancy Ltd T/a Edu Plus Care | London | A rating |
| SKILL SURGE LIMITED | London | A rating |
| Skillbond Direct Limited | High Wycombe | A rating |
| SKILLED BUILDING SOLUTION LIMITED | Birmingham | A rating |
| Skilled Contracts | Feeny | A rating |
| Skilled Homecare Services | London | A rating |
| Skilled Workers Cloud LTD | London | A rating |
| SKILLHET LTD | LONDON | A rating |
| SKILLIKZ LTD | Basildon | A rating |
| Skillington Workshop Limited | Grantham | A rating |
| Skillistic Limited | London | A rating |
| Skillnet Solutions Private Limited | Richmond | A rating |
| Skills 4 All Ltd | Rochdale | A rating |
| SKILLS 4 EDUCATION LTD | ROMFORD | A rating |
| SKILLS ALLIANCE (PHARMA) LTD | London | A rating |
| Skills and Education Group | Nottingham | A rating |
| Skills and Education Ltd | Ilford | A rating |
| Skills Consultancy & Management UK Limited | London | A rating |
| Skills Growth Academy Ltd | London | A rating |
| Skills Max Academy Limited | London | A rating |
| Skills Office Network | Gateshead | A rating |
| Skills Provider Limited | Chelmsford | A rating |
| SKILLS4STEM LTD. | Bedford | A rating |