| Skystar Stores Limited | Watford, | A rating |
| Skystone Finance UK Limited | London | A rating |
| SKYSUN LIMITED | London | A rating |
| SkySys LTD | London | A rating |
| SKYTALE SERVICES LTD | London | A rating |
| Skytax Accounting Limited | London | A rating |
| SKYTECH SOLUTIONS UK LIMITED | Birmingham | A rating |
| SKYTOUCH BUSINESS HUB LIMITED | London | A rating |
| SKYVIEW BUILDERS LIMITED | Heston | A rating |
| SKYVIEW WINDOWS LTD | Willenhall | A rating |
| Skyvillion Apartments Limited | London | A rating |
| Skywall Consulting Ltd | Rugby | A rating |
| SKYWAYS ALUMINUM SHOPFRONT LTD | HOUNSLOW | A rating |
| SKYWAYS TRAVEL LTD | BOLTON | A rating |
| Skywings Ltd | London | A rating |
| Skywire Ltd | London | A rating |
| SKYWISE LIMITED | Manchester | A rating |
| SKZ CONSULTING LTD | ILFORD | A rating |
| SKZ RETAILS LTD | Glasgow | A rating |
| SL Assist Ltd T/A Bluebird care | Stafford | A rating |
| SL Dentistry Ltd | Edinburgh | A rating |
| SL Engineering Ltd | Sleaford | A rating |
| SL Foods Ltd | London | A rating |
| SL HEALTHCARE AGENCY LTD | Cardiff | A rating |
| SL MOTORS LTD | Romford | A rating |
| SL Precision Engineers Ltd T/A SL Plastics | Thetford | A rating |
| SL Venture Investments Ltd t/a Mughal-e-Azam Restaurant & Banqueting | BIRMINGHAM | A rating |
| SL6 Limited | Maidenhead | A rating |
| SLA Food & Wine Limited T/A MP Food and Wine and Go Local | Liverpool, | A rating |
| SLACK ROAD NEWS LTD | Manchester | A rating |
| slade social cafe & catering ltd | London | A rating |
| Sladen Consulting Limited | Hathersage | A rating |
| Slalom Consulting Limited | London | A rating |
| Slam Transport Limited | Coventry | A rating |
| SLAMcore Limited | London | A rating |
| Slanjayvah Danza | PERTH | A rating |
| SLASA LIMITED | Nottingham | A rating |
| Slate Asset Management (Europe) Limited | London | A rating |
| Slater & Gordon (UK) 1 Limited | Manchester | A rating |
| Slater Investments Limited | London | A rating |
| SLATERS ELECTRICALS LIMITED | Blaydon-On-Tyne | A rating |
| Slaughter and May | London | A rating |
| Slay Wholesale Ltd t/a Pure | Warrington | A rating |
| SLC Direct ltd | Reading | A rating |
| SLC Turnberry Ltd - Trump Turnberry | Turnberry | A rating |
| SLCMSSLtd T/A Stewarts Butchers | Enniskillen | A rating |
| SLE Ltd | Croydon | A rating |
| SLEAFORD CAR CENTRE LTD | Peterborough | A rating |
| Sleaford Cricket Club | Sleaford | A rating |
| Sleaford Medical Group | Sleaford | A rating |
| Sleaford Quality Foods Ltd | Sleaford | A rating |
| SLEAPCROSS HOUSE LTD | ST ALBANS | A rating |
| SLED HEALTHCARE LTD | Chelmsford | A rating |
| SLEEC Ltd | Hockley Hill, | A rating |
| SLEEK ACCOUNTING LIMITED | Leeds | A rating |
| Sleek Car Sales Ltd | Bolton | A rating |
| Sleek Events Ltd | Wimbledon | A rating |
| Sleek Immigration Services Ltd | London | A rating |
| Sleek Technology Limited | London | A rating |
| Sleemans Trading Limited | Swindon | A rating |
| Sleep and Beyond Limited | Rochdale | A rating |
| Sleep Dove Beds Limited | Dewsbury | A rating |
| SLEEP&DREAMS LTD | Nuneaton | A rating |
| Sleeping Giant Media | Folkestone | A rating |
| Sleeptex Limited | London | A rating |
| Sleeves Limited | Derby | A rating |
| Sleigh Tours Scotland Ltd | Edinburgh | A rating |
| Slender Winter Partnership Limited | West Malling | A rating |
| Slerp Limited | London | A rating |
| Sleven Fitness Limited | London | A rating |
| SLFC Services Company (UK) limited | Basingstoke | A rating |
| SLG HALAI LTD | Wigan | A rating |
| SLH UK LONDON MANAGEMENT LIMITED T/A Six Senses London | London | A rating |
| SLICE & BITES SOTON LIMITED | SOUTHAMPTON | A rating |
| SLICE N SCOOP LTD t/a Slice 'N' Scoop | Bilston | A rating |
| Slice of Heaven Ltd t/a Sabeez | Plymouth | A rating |
| Slice of India Limited TA Slice of India | Derby | A rating |
| Sliced Bread Animation Limited | London | A rating |
| Sliced Bread Limited | Cheshire | A rating |
| Sliced Bread Ltd | Alderley Edge | A rating |
| SLICES WELLINGTON LTD | Telford | A rating |
| Slick Parts LTD | Oldham | A rating |
| SLICK STITCH EMBROIDERY COMPANY LIMITED | WOLVERHAMPTON | A rating |
| Slide Samurai Limited | Harrow | A rating |
| SlideGenius Limited | London | A rating |
| Sliding Wardrobes 4U Ltd | Ilford | A rating |
| Slieve Dhu Limited | Newcastle | A rating |
| Slig Law LLP | London | A rating |
| Sligachan Ltd | Highland | A rating |
| Slims Kitchen | Magherafelt | A rating |
| Slimstock Ltd | Redditch | A rating |
| SLINE TRAVEL LIMITED | BLACKBURN | A rating |
| Slinfold Cricket Club | Slinfold | A rating |
| Slingshot Aerospace Limited | Newquay | A rating |
| Slingshot AI Limited | London | A rating |
| SLINGSHOT THERAPEUTICS LIMITED | London | A rating |
| SLiNK-TECH LTD | Bristol | A rating |
| Slip Technology Limited | London | A rating |
| Slipform Engineering Limited | London | A rating |
| Slippery Drinks Ltd T/A The Tamil Prince | London | A rating |
| Slipshoe Street Dental Surgery | Reigate | A rating |
| Slitherine Software UK Ltd | Lower Kingswood | A rating |
| SLK MANCHESTER LIMITED | Salford | A rating |
| SLK UK Private Limited | LONDON | A rating |
| SLM AGENCY LTD | Lytham St Annes | A rating |
| SLM2020 LTD | LONDON | A rating |
| Sloan Medical Centre | Sheffield | A rating |
| Sloan Water Technology Limited | Southampton | A rating |
| Sloane (Services) Ltd | London | A rating |
| Sloane and Cadogan Land Management Limited | London | A rating |
| SLOANE DRY CLEANERS LTD | LONDON | A rating |
| SLOANE PARK WEST LIMITED | London | A rating |
| Sloane Square Hotel | London | A rating |
| Sloane Street Auction Galleries Limited | London | A rating |
| Sloane Talent Ltd | London | A rating |
| Sloaner LTD | London E17 4EE | A rating |
| Slodi Ltd T/A Jacqui Psychology | London | A rating |
| Sloegrin Ltd | Salford | A rating |
| SLOM TRADING LTD | Barnsley | A rating |
| Slough and East Berkshire C of E Multi Academy Trust | Slough | A rating |
| SLOUGH AUTOCARE LTD | Slough | A rating |
| Slough Borough Council | Slough | A rating |
| Slough Ceramics Limited | Slough | A rating |
| SLOUGH CITY REAL ESTATES LIMITED | Slough | A rating |
| Slough Cottage Limited Trading As Chicken Cottage | Slough | A rating |
| Slough Cricket Club | Slough | A rating |
| Slough Islamic Trust | Slough | A rating |
| Slow Boat Limited | Chester | A rating |
| Slow Touch Ltd | Staines | A rating |
| SLPN LTD | Preston | A rating |
| SLR ASSOCIATES LIMITED T/A SLR IT SOLUTIONS | Coventry | A rating |
| SLR Care Homes Ltd | Kent | A rating |
| SLR Consulting Limited | London | A rating |
| SLS Consultants Europe Ltd | London | A rating |
| SLS Enterprises Limited | Eastleigh | A rating |
| SLS FOODS LIMITED T/A Rajdoot restaurant | guildford, surrey | A rating |
| SLSPEC Ltd | Weston-super-Mare | A rating |
| Sludge TEK Ltd | Andover | A rating |
| SLURRYKAT LTD | CRAIGAVON | A rating |
| SLW LIMITED SYCAMORE CARE CENTRE | SUNDERLAND | A rating |
| Slyne Stores Ltd | Lancaster | A rating |
| SM ACCESSORIES UK LIMITED | LONDON | A rating |
| SM AHMED LTD | London | A rating |
| SM Autos | SHEFFIELD | A rating |
| SM BALTI HOUSE LTD | Wirral | A rating |
| SM BUILDING WORKS LTD | Milton Keynes | A rating |
| SM CASH & CARRY LIMITED | Lancashire | A rating |
| SM CONSTRUCTIONS SERVICES LIMITED | Luton, | A rating |
| SM Convenience Store Ltd | Birmingham | A rating |
| SM Dental Care Ltd | Cannock | A rating |
| SM Express Ltd | Barking | A rating |
| SM Food BD Ltd | London | A rating |
| SM Foods Ltd | Barking | A rating |
| SM Global Consultancy Ltd t/a Staffing Match | Feltham | A rating |
| SM Global Solutions Ltd | Woodford Green | A rating |
| SM GLOBALLY SORTED LTD | Edinburgh | A rating |
| SM Group Limited t/a Gourmet Peri Peri Chicken | Brierley Hill | A rating |
| SM Homecare Services Ltd | COVENTRY | A rating |
| SM Innovation Limited | Belfast | A rating |
| SM Karim Property Ltd | London | A rating |
| SM Life Care Ltd | Leicester | A rating |
| SM Logistical Ltd | Birmingham | A rating |
| SM London Construction Ltd | Pinner | A rating |
| SM Mortgage Services LTD | Brierley Hill | A rating |
| SM Nathan Limited | Birstall | A rating |
| SM PG SERVICES LTD | Wembley | A rating |
| SM Pigs Ltd | Strabane | A rating |
| SM PIZZERIA LIMITED | Bournemouth | A rating |
| SM Property Management Solutions Ltd | Kingsbury, London | A rating |
| SM QURESHI LIMITED | High Wycombe | A rating |
| SM Retailer Ltd | Chatham | A rating |
| SM SHEPSHED LTD | Cardiff | A rating |
| SM SOLUTIONS (PVT) LTD | London | A rating |
| SM Sons Grocers Ltd | Watford | A rating |
| SM STORE LIMITED T/A AHMED'S NEWS | London | A rating |
| SM Voice Advocacy Limited | Basingstoke | A rating |
| SM2 LONDON LTD | Croydon | A rating |
| SM24 HEALTHCARE LTD | NEWCASTLE UPON TYNE | A rating |
| SMA (DERBY) LTD | Derby | A rating |
| SMA ENTERPRISES LTD | Bradford | A rating |
| SMA Solar UK Ltd | Milton Keynes | A rating |
| SMA WORLDWIDE LTD | WATFORD | A rating |
| SMAA Developments Limited | London | A rating |
| SMAART TECH UK LTD | Surrey | A rating |
| SMAAT LIMITED | LONDON | A rating |
| Smaci Ltd | NORTHOLT | A rating |
| SMACKS HAMBURGERS FRANCHISE LTD | Croydon | A rating |
| SMACKS HAMBURGERS LIMITED | Thornton Heath | A rating |
| SMACKS HAMBURGERS LIMITED | London | A rating |
| Smaky Limited | Stockport | A rating |
| SMALL & CUTE NAIL & BEAUTY LTD | London | A rating |
| Small Axe Communications Ltd | London | A rating |
| Small Batch Coffee Company Limited | Attleborough | A rating |
| Small Beer Brew Co. Ltd | London | A rating |
| SMALL HEATH MAS BAZAAR LIMITED TA Kacha Bazar | Birmingham | A rating |
| Small is Beautiful Ltd TA Teepee Day Nursery | Bracknell | A rating |
| SMALL ISLAND BOUTIQUE LIMITED | Glasgow | A rating |
| Small Luxury Hotels of the World Limited | London | A rating |
| Small Steps SFP | Richmond | A rating |
| Small Talk Nurseries Limited | Birmingham | A rating |