| St Mary's School | Calne | A rating |
| St Mary's School | Gerrards Cross | A rating |
| St Mary's School Ascot | Ascot | A rating |
| St Mary's School, Hampstead | Hampstead | A rating |
| St Mary's Surgery | Ely | A rating |
| St Mary's University | Twickeham | A rating |
| St Mary's University | Twickenham | A rating |
| ST MARYLEBONE SCHOOL | LONDON | A rating |
| ST MARYS CARE SERVICES LTD | Bridlington | A rating |
| St Marys Catholic Primary School | London | A rating |
| St Matthew's Church | London | A rating |
| St Matthew's Primary School | Luton | A rating |
| St Matthew's RC High School | Manchester | A rating |
| St Matthews Catholic Primary School | Liverpool | A rating |
| St Matthews Ltd | Northampton | A rating |
| St Mellitus College Trust | London | A rating |
| St Melor House Surgery | Salisbury | A rating |
| St Michael Angel estate | Cardiff | A rating |
| St Michael le Belfrey PCC | York | A rating |
| ST MICHAEL'S ABBEY CHARITABLE TRUST | Farnborough | A rating |
| St Michael's Manor Hotel | St Albans | A rating |
| St Michaels Care Homes | Eastbourne | A rating |
| St Michaels Church | London | A rating |
| St Michaels Homes Ltd | Brentwood | A rating |
| St Michaels News | Halton | A rating |
| ST MICHAELS SERVICE STATION LTD | London | A rating |
| St Monica Trust | Bristol | A rating |
| ST MOTOR GROUP | Southnorwood | A rating |
| St Mungo Community Housing Association | London | A rating |
| ST NEOTS GRILL HOUSE LTD | St Neots | A rating |
| St Neots Service Limited | St. Neots | A rating |
| ST NEOTS TURKISH RESTAURANT LIMITED | Cambridgeshire | A rating |
| St Nicholas Food & Wine | Abbeywood | A rating |
| St Nicholas Hospice Care | Bury St Edmunds | A rating |
| St Nicholas House Ltd | Powys | A rating |
| ST NICHOLAS' SCHOOL | Fleet | A rating |
| ST OAK LIMITED | St. Albans | A rating |
| St Olave's and St Saviour's Schools Foundation CIO | Orpington | A rating |
| St Olave's Prep School | London | A rating |
| ST OLAVES LIMITED | London | A rating |
| St Oswald's Hospice | Newcastle upon Tyne | A rating |
| St Oswalds Care Home | Warrington | A rating |
| St Pancras Clinical Research Ltd | London | A rating |
| St Pancras Hotel Grp Ltd | London | A rating |
| St Pancras Hotel Services Ltd | London | A rating |
| St Patrick's Missionary Society | Weybridge | A rating |
| St Patrick's Roman Catholic Church | London | A rating |
| St Paul's Academy | London | A rating |
| St Paul's C of E Primary School, Kingston Hill | Kingston Upon Thames | A rating |
| St Paul's Church PCC | LONDON | A rating |
| St Paul's Clinic | Newport | A rating |
| St Paul's Knightsbridge PCC | London | A rating |
| St Paul's New Covenant Church | Bristol | A rating |
| St Paul's School | London | A rating |
| St Pauls Medical centre | Blackpool | A rating |
| St Peter & St Paul's Church | Bedford | A rating |
| St Peter Edinburgh Limited | Edinburgh | A rating |
| St Peter's Care Home Limited | Bury St Edmunds | A rating |
| St Peter's Catholic Voluntary Academy Trust | Bournemouth | A rating |
| St Peter's Foundation | Salcombe | A rating |
| St Peter's High School & Sixth Form Centre | Gloucester | A rating |
| St Peter's Hill Surgery | Grantham | A rating |
| St Peter's lodge Dental Practice | St Albans | A rating |
| St Peter's Pharmacy Ltd | London | A rating |
| St Peters CC | Brighton | A rating |
| ST PETERS HOME LIMITED | MARGATE | A rating |
| St Peters Home Ltd | Kent | A rating |
| St Peters Italian Catholic Church Little Saffron Hill | London | A rating |
| St Peters School | York | A rating |
| St Philips Caledonia Care Ltd | Wednesfield | A rating |
| St Philips Care Limited | Wednesfield | A rating |
| St Philomena's Catholic High School for Girls | Carshalton | A rating |
| St Pierre Groupe Limited | Manchester | A rating |
| St Quentin residential home ltd | NEWCASTLE UNDER LYME | A rating |
| St Ralph Sherwin Catholic Multi Academy Trust | Derby | A rating |
| St Raphael's Hospice | Sutton | A rating |
| St Richard's Hospice Foundation | Worcester | A rating |
| St Richard's Road Surgery | Deal | A rating |
| ST ROBOTICS LTD | Cambridge | A rating |
| ST RONANS NURSING AND RESIDENTIAL CARE HOME | PORTSMOUTH | A rating |
| St Sarkis Property CIO | London | A rating |
| St Saviour's & St Olave's Church of England School | London | A rating |
| St Silas Episcopal Church, Glasgow (SCIO) | Glasgow | A rating |
| St Stephen's Church, Westbourne Park | London | A rating |
| St Stephens Gate Medical Practice | Norwich | A rating |
| St Stephens Visionplus Limited T/A Specsavers Opticians | Norwich | A rating |
| ST SUN LTD T/A MITFORD ROAD MINI MART | Alresford | A rating |
| St Swithun's School | Winchester | A rating |
| ST TANDOORI LTD | Hartlepool | A rating |
| St Teresa of Calcutta Catholic Academy Trust | Bury | A rating |
| St Thomas Evangelical Church of India - UK Parish | Watford | A rating |
| St Thomas Mar Thoma Church, Bristol | Bristol | A rating |
| St Thomas Medical Group | Exeter | A rating |
| St Thomas Surgery | Haverfordwest | A rating |
| St Thomas' Church Philadelphia | Sheffield | A rating |
| St Vincent Care Homes Ltd | Gosport | A rating |
| St Vincent de Paul Society (England & Wales) | London | A rating |
| ST VINCENT'S CARE LTD T/A ST VINCENT'S CARE HOME | East Sussex | A rating |
| St Vincent's Catholic Primary School | London | A rating |
| St Vincent's Hospice | Renfrewshire | A rating |
| St Werburgh's Derby Ltd | Derby | A rating |
| St Werburghs Food & Wine | Bristol | A rating |
| St Wilfrid's Hospice | EASTBOURNE | A rating |
| St Wulfstan Surgery | Southam | A rating |
| St Yeghiche Armenian Church Parish Ltd | London | A rating |
| ST. ALBANS STORE LTD | Lytham | A rating |
| ST. ALDHELM'S PHARMACY LIMITED | Leicester | A rating |
| St. Andrew's Medical Practice | Spennymoor | A rating |
| St. Andrews Brewing Company Ltd | St. Andrews | A rating |
| St. Andrews C Of E Primary School | LONDON | A rating |
| St. Andrews Surgery | Eastleigh | A rating |
| St. Annes School Sixth Form College and residence | Hessle | A rating |
| ST. ANTHONY'S NEWS LTD | Newcastle upon Tyne | A rating |
| St. Aubin nurseries Ltd | Penarth | A rating |
| ST. CATHERINE CARE HOMES LIMITED T/A MONSON RETIREMENT HOME | LINCOLN | A rating |
| St. Cenydd Food Store | Caerphilly | A rating |
| St. Cloud State University | Alnwick | A rating |
| St. Columb's School of Music Ltd. | Londonderry | A rating |
| ST. DOMINIC'S LTD | Surrey | A rating |
| St. Edmund's School Trust Ltd | Hindhead | A rating |
| ST. EDMUNDS SPICE HOUSE LTD | Bury St. Edmunds | A rating |
| St. Edward's R.C. Primary School | London | A rating |
| St. Edwards C of E Primary School | Romford | A rating |
| St. Elmo Care Ltd | Ringwood | A rating |
| St. Erick Group (UK) Co., Ltd | LONDON | A rating |
| ST. ERMIN'S OPERATING (UK) LIMITED | London | A rating |
| St. Francis Private Care Home Ltd. | PORTADOWN | A rating |
| St. George's Healthcare NHS Trust | Tooting | A rating |
| St. George's Hospital Limited | Lowestoft | A rating |
| St. George's Hospital Ltd | Lymington | A rating |
| St. Gregorios Indian (Malankara) Orthodox Church | London | A rating |
| ST. GREGORY'S HOUSE LTD. | MILNTHORPE | A rating |
| St. Hugh's Catholic Primary School | Liverpool | A rating |
| St. James Hotel Limited | London | A rating |
| St. james' Lodge | BALLYMONEY | A rating |
| St. James's Place plc | Cirencester | A rating |
| St. John Bosco College | Battersea | A rating |
| ST. JOHN MARYLEBONE LTD | LONDON | A rating |
| ST. JOHN RESTAURANT COMPANY LIMITED | LONDON | A rating |
| St. John's Preparatory & Senior School Ltd | Potters Bar | A rating |
| St. John's Wood Square Limited | London | A rating |
| St. Johns Medical Centre | Lewisham | A rating |
| St. Joseph's College | London | A rating |
| St. Joseph's Hospice, Hackney | Hackney | A rating |
| St. Joseph's RC High School | Newport | A rating |
| St. Josephs Nursing Home | Chelmsford | A rating |
| St. Jude Care Homes Ltd | Raunds | A rating |
| St. Lawrence University (USA) London Programme | London | A rating |
| St. Luke's Oxford | OXFORD | A rating |
| St. Luke's Trust Limited | Stroud | A rating |
| St. Marguerite Residential Care Home Ltd T/A St. Marguerite Residential Care Home | Eastbourne | A rating |
| ST. MARK SERVICES LIMITED | West Dryton | A rating |
| ST. MARTIN'S (NORTHWOOD) PREPARATORY SCHOOL TRUST LIMITED | Northwood | A rating |
| St. Martin's Management Limited | Milton Keynes | A rating |
| ST. MARY NURSERIES LIMITED | Brentwood | A rating |
| St. Mary of the Angels Catholic Primary School | London | A rating |
| St. Mary's Catholic High School | Croydon | A rating |
| St. Marys Private Wealth Ltd | London | A rating |
| ST. MATTHEWS LIMITED | Northampton | A rating |
| St. Mellons Golf Club (1964) Limited | Cardiff | A rating |
| St. Michael's Catholic Grammar School | London | A rating |
| St. Michael's CofE Primary | Bristol | A rating |
| St. Michaels & All Angels Church | London | A rating |
| St. Pancras Stores Limited T/A St. Pancras Store | Lewes | A rating |
| St. Paul's Catholic School | Milton Keynes | A rating |
| St. Peter's Brewery Co Ltd | Bungay | A rating |
| St. Stephen Charismatic Episcopal Church | Plaistow | A rating |
| St. Thomas Church | Lancaster | A rating |
| ST. THOMAS TRADING COMPANY LIMITED | Norwich | A rating |
| ST. UNIVERSE TUTORS LIMITED | London | A rating |
| St. Vincents Nursery Ltd | Pinner | A rating |
| St.Cecilia Care Home | Poole | A rating |
| St.Davids Diocesan Board of Finance (The) | Carmarthenshire | A rating |
| St.Helens Council | St.Helens | A rating |
| St.Katharine Docks Practice | London | A rating |
| ST.MARY'S RESTAURANT LIMITED | NORWICH | A rating |
| St.Marys House Care Home | Bungay | A rating |
| St.Michael's Support Limited | Northampton | A rating |
| St.Peter's Mar Thoma Church East Area,London-UK | Romford | A rating |
| St.Vibes Ltd | London | A rating |
| ST1 Consulting Limited | Ely | A rating |
| STA DIAGNOSTICS LTD (17054131) | ENGLAND | A rating |
| STA Legal Limited | Maidstone | A rating |
| STA Partners Ltd T/A Sycamore Stores | Kent | A rating |
| STAAC DESIGN LIMITED | Newhaven | A rating |
| STAASH ENTERPRISES LTD t/a Papa John's Pizza | High Wycombe | A rating |
| STABILISED PAVEMENTS LIMITED | Scaldwell | A rating |
| Stabiliti Ltd | London | A rating |
| Stability AI Ltd | London | A rating |
| Stabilo UK Limited | Dunstable | A rating |
| Stable Asset Management Limited | London | A rating |
| Stable Lives Care Ltd | Sheffield | A rating |
| Stable Steps Ltd T/A Stable Steps Care Centre | Stockport | A rating |
| StableLogic Ltd | London | A rating |
| Stablepharma Limited | Bath | A rating |
| Stace LLP | Epping | A rating |
| Stack 'M High Limited | Weyhill | A rating |
| STACK Infrastructure EMEA Limited | London | A rating |
| Stack Overflow Ltd | London | A rating |
| STACK SPORTS UK LIMITED | Manchester | A rating |