| Thivakar Navaratnam t/as Lawns News Agent | Broadstairs | A rating |
| Thivakaran Thillainathan T/A Harry's salad Bar | Newark | A rating |
| THIYAAN AKM LTD | Cardiff | A rating |
| THIYAGARASA ENTERPRISES LTD T/A PREMIER | Gloucestershire | A rating |
| Thiyana Ltd | London | A rating |
| THIYANAMANY KEMANATHAN T/A HIGH ROAD STORE - GO LOCAL EXTRA | CUMBRIA | A rating |
| Thiyash Limited T/A Burbank Food & Wine | Hartlepool | A rating |
| THN Accountants Ltd | Ilford | A rating |
| THOBANI SERVICES LTD(Mary's Home) | SOUTH CROYDON | A rating |
| Thoburns Communications Limited | London | A rating |
| Thom Bell trading as Kinross Polo Club | Kinross | A rating |
| Thom Browne UK Limited | London | A rating |
| Thoma Bravo UK Advisers LLP | London | A rating |
| Thoma Bravo UK Limited | London | A rating |
| Thomas and Adamson | Edinburgh | A rating |
| Thomas Barrie & Co | Glasgow | A rating |
| Thomas Baty (Newcastle upon Tyne) Ltd | Gateshead | A rating |
| Thomas Broadbent & Sons Limited | Huddersfield | A rating |
| THOMAS CLIFFORD LTD | Leeds | A rating |
| Thomas Conracting LTD | Caerwys | A rating |
| Thomas Consulting Limited | Chorley | A rating |
| Thomas Cook Tourism (UK) Company Ltd | London | A rating |
| Thomas Coombs Limited | Leeds | A rating |
| Thomas Cooper Memorial Church | Lincoln | A rating |
| Thomas David Beim | Cirencester | A rating |
| Thomas Deacon Education Trust | Peterborough | A rating |
| Thomas Franks Ltd | Banbury | A rating |
| Thomas Hill Sales and Lettings Ltd | Peterborough | A rating |
| THOMAS HOWSE LIMITED | Rowley Regis | A rating |
| Thomas Hutchinson and Sons Limited | COOKSTOWN | A rating |
| Thomas Knight Care Home Limited | Blyth | A rating |
| THOMAS KNIGHT CARE HOME LIMITED | Blyth, | A rating |
| Thomas Mansfield Solicitors | London | A rating |
| Thomas Miller (UK) Holdings Company Ltd | London | A rating |
| Thomas Mills High School | Woodbridge | A rating |
| Thomas More Catholic School | Purley | A rating |
| Thomas Murray Network Management Limited | London | A rating |
| Thomas Nagy Ltd | London | A rating |
| Thomas Preston & Associates Limited | London | A rating |
| Thomas Salvesen Enterprises Limited | Corby | A rating |
| Thomas Startin Junr Ltd | Redditch | A rating |
| Thomas Swan & Co. Limited | Consett | A rating |
| Thomas Telford Multi Academy Trust | Telford | A rating |
| Thomas Thor Associates Ltd | Bristol | A rating |
| Thomas Veterinary Ltd | Wangford | A rating |
| Thomas Walker Westgate Healthcare | Peterborough | A rating |
| Thomas, Carroll (Brokers) Ltd | Caerphilly | A rating |
| Thomas's London Day Schools | Ringwood | A rating |
| Thompson Aero Seating | Portadown | A rating |
| Thompson Allen LLP | Brighton | A rating |
| THOMPSON AUDIO VISUAL COMMUNICATIONS LIM ITED | WOLVERHAMPTON | A rating |
| Thompson Commercials Ltd | Hull | A rating |
| Thompson Pinto Limited | Weybridge | A rating |
| THOMPSON WILSON ESTATE AGENTS LTD | England | A rating |
| Thompsons Bespoke Limited | Poulton Le Fylde | A rating |
| THOMPSONS NEWS AND FOOD | DUNSTABLE | A rating |
| THOMPSONS NEWS STORES LIMITED | Great Yarmouth | A rating |
| Thompsons UK Ltd. | Croydon | A rating |
| Thoms Statistical Consultants Ltd "Clifton Insight" | Bristol | A rating |
| Thomson Bethune Ltd | Edinburgh | A rating |
| Thomson Dental Care Limited | North Berwick | A rating |
| Thomson Foundation | London | A rating |
| Thomson Gray Ltd | Edinburgh | A rating |
| Thomson House School | LONDON | A rating |
| Thomson Reuters (Professional) UK Limited | Canary Wharf | A rating |
| Thondon Ltd | London | A rating |
| Thongsbridge Cricket Club | Holmfirth | A rating |
| Thor Companies Ltd | London | A rating |
| Thor Gold Venture LTD | London | A rating |
| Thor Investment Advisor Europe Ltd | London | A rating |
| Thor Ltd | London | A rating |
| THOR Photomedicine Ltd | Amersham | A rating |
| Thoresby colliery cricket club | Edwinstowe | A rating |
| Thorlabs Limited | Ely | A rating |
| Thorn Lighting Ltd | Spennymoor | A rating |
| Thorn Security Limited | Sunbury On Thames | A rating |
| Thornaby & Barwick Medical Group | Stockton On Tees | A rating |
| THORNABY CRICKET CLUB | THORNABY | A rating |
| Thornacre Engineering Ltd | London | A rating |
| Thornage Hall Independent Living | Holt | A rating |
| Thornbridge Investment Management LLP | London | A rating |
| Thornbury Castle Hotel Ltd | Bristol | A rating |
| Thornbury Furniture Ltd | Bradford | A rating |
| THORNDENE LTD | SWINGFIELD NR DOVER | A rating |
| THORNDIKE DENTAL PRACTICE | ROCHESTER | A rating |
| Thorndon Partners Ltd | London | A rating |
| Thorneloe Lodge Surgery | Worcester | A rating |
| Thornfield Medical Group | Newcastle upon Tyne | A rating |
| Thorngate Churcher Trust | Gosport | A rating |
| Thornhill Dental Practice | Thornhill | A rating |
| Thornhill Health Care | Bristol | A rating |
| Thornhill Legal Ltd | London | A rating |
| Thornhill Shann Construction Limited | London | A rating |
| Thornhills Medical Practice | Aylesford | A rating |
| THORNICROFTS LIMITED | London | A rating |
| Thornleigh Camphill Communities Ltd | Thornbury | A rating |
| Thornleigh Food & Wine Ltd T/A Thornleigh Food & Wine | Leeds | A rating |
| Thornleigh Hire Limited | Belfast | A rating |
| Thornlink Limited | Pencoed | A rating |
| Thornton & Lowe Ltd | Bolton | A rating |
| Thornton & Ross Limited | Nr Huddersfield | A rating |
| Thornton Care Ltd | Thornton-Cleveleys | A rating |
| Thornton College | Milton Keynes | A rating |
| Thornton Day Nursery Ltd | Thornton Heath | A rating |
| Thornton Hall Country Park | Bradford | A rating |
| THORNTON HEATH DENTAL PRACTICE LIMITED | Thornthon Heath | A rating |
| Thornton Lodge Limited | Surrey | A rating |
| Thornton Roofing (Ireland) Limited | Toome | A rating |
| Thornton Tomasetti Ltd | London | A rating |
| Thornton Tomasetti Warrington Limited | Warrington | A rating |
| Thorntoun Limited | Crosshouse | A rating |
| THORNWOOD AND WELLBROOK LIMITED T/A Lush Desserts | Chester Le Street | A rating |
| Thornwood Care Limited | Bexhill On Sea | A rating |
| Thorogood Associates Limited | London | A rating |
| Thorough Care Corporation Ltd | Rochford | A rating |
| Thoroughbred Polo Ponies Limited | Birdlip | A rating |
| Thorp Precast Ltd | Newcastle Under Lyme | A rating |
| Thorpe Pharma ltd | Boston | A rating |
| Thorpe Wood Care Homes | Peterborough | A rating |
| Thorpes Joinery Ltd | Market Harborough | A rating |
| Thorpewood Medical Group | Norwich | A rating |
| THORPLANDS LTD | NORTHAMPTON | A rating |
| Thorrington Store Limited T/A Thorrington Post Office | Thorrington | A rating |
| Thortful Limited | London | A rating |
| THOSAI LIMITED t/a Dosa World | BOURNEMOUTH | A rating |
| Those Aren't Mountains Ltd | Hackney | A rating |
| Thoth Financial Advisory Limited | Sutton | A rating |
| Thotherapy Christian Fellowship Trust | London | A rating |
| THOUB ALHARAMAIN LTD | MANCHESTER | A rating |
| Thoucentric Limited | Harrow | A rating |
| Thought Collective Ltd | Belfast | A rating |
| Thought Consultancy Ltd | Newcastle upon Tyne | A rating |
| Thought Machine Group Limited | London | A rating |
| THOUGHTBOT LIMITED | London | A rating |
| ThoughtClan Technologies (UK) LTD | Evesham | A rating |
| THOUGHTFUL CARE LIMITED | Dunstable | A rating |
| Thoughtful Consultancy Limited | Hove | A rating |
| Thoughtful Consultancy limited t/a Roundhay Digital | Hove | A rating |
| THOUGHTIN LTD | LONDON | A rating |
| ThoughtLDR Limited | London | A rating |
| ThoughtRiver Ltd | London | A rating |
| ThoughtSpot EMEA Ltd | London | A rating |
| ThoughtWorks Ltd | London | A rating |
| Thovex Limited | Cirencester | A rating |
| THRANGU RINPOCHE TRUST | Oxford | A rating |
| Thrayam Ltd Trading As Thrissur Pooram Authentic Indian Kitchen | Leeds | A rating |
| THREADMARK LLP | LONDON | A rating |
| Threadneedle Management Services Limited | LONDON | A rating |
| Threadneedle Software Ltd | London | A rating |
| Threads Global Ltd | London | A rating |
| ThreatAware Limited | London | A rating |
| ThreatSpike Labs Limited | London | A rating |
| Thredd (UK) Limited | London | A rating |
| Three A Lane Limited T/A The Viking Fish Bar | Watford | A rating |
| Three Angel Health Care Ltd | Romford | A rating |
| Three Bakers Limited | Liverpool | A rating |
| Three Bills Ltd | Eastleigh | A rating |
| Three Body Capital Limited | London | A rating |
| Three Boys Express Limited | Newcastle,England | A rating |
| Three Bridges Cricket Club | Crawley | A rating |
| THREE BROTHERS GLA LIMITED | Glasgow | A rating |
| Three brothers Glasgow Ltd | Johnstone | A rating |
| Three Brothers Leamington Ltd T/A Wingers | Leamington Spa | A rating |
| THREE BROTHERS LONDON LTD T/A THE ROYAL BENGAL | London | A rating |
| Three Butterflies Nursery/Preschool | Waltham Abbey | A rating |
| Three Cliffs Geomechanical Analysis Limited | SWANSEA | A rating |
| Three Clover care ltd | Welwyn Garden City | A rating |
| THREE COUNTIES CARE SERVICES LTD | Birmingham | A rating |
| THREE CROWNS (SERVICES) LLP | LONDON | A rating |
| THREE DOTS GROUP LTD | Northolt | A rating |
| THREE EAGLES LTD | London | A rating |
| Three Falcons W10 Limited T/A The Knight of Notting Hill | London | A rating |
| THREE FLAMES LTD | Wakefield | A rating |
| THREE FLAMES STEAKHOUSE LTD | Dewsbury | A rating |
| Three Horseshoes country inn & Spa | Leek | A rating |
| Three Horseshoes Limited | Feltham | A rating |
| Three Ings Food & Wine Ltd | Foresthill | A rating |
| Three Islands Limited | Toomebridge | A rating |
| Three Islands Trading Co Ltd | London | A rating |
| Three lakes restaurant | Ware | A rating |
| Three Leaves LTD | Detchet | A rating |
| Three M Sisters Ltd. | London | A rating |
| Three McCallum Limited | Pitlochry | A rating |
| Three Oaks Care Home Limited | Welwyn | A rating |
| Three Parks Development Limited | New Malen | A rating |
| THREE PARTNERS DESTINY LTD | Oldbury | A rating |
| THREE PILLARS VENTURE LTD | London | A rating |
| THREE PIONEERS LIMITED | London | A rating |
| Three Plus Consulting Ltd | London | A rating |
| THREE ROCKS LTD | Thame | A rating |
| Three Roses Ltd | Bristol | A rating |
| THREE S WEYMOUTH LIMITED | Weymouth | A rating |
| Three Shapes Management Limited | Ormskirk | A rating |
| Three Shires Care Limited T/A Home Instead Hereford | Hereford | A rating |
| Three Shires Ltd | Leicestershire | A rating |
| THREE SISTERS CARE LTD | London | A rating |
| Three Six Zero GRP Limited | London | A rating |
| THREE SPICES LTD | DERBYSHIRE | A rating |
| Three Spires Trust | Stafford | A rating |
| THREE STAR SOLUTION LIMITED | Grays | A rating |