| Hickleys Limited | TAUNTON | A rating |
| Hickory's Smokehouse Limited | Chester | A rating |
| Hicom Technology Limited | Brookwood, woking | A rating |
| HICP Limited | Romford | A rating |
| HICX Solutions Ltd | London | A rating |
| HID Corporation Limited | CARDIFF | A rating |
| HID Group UK Ltd | London | A rating |
| HID LTD | LONDON | A rating |
| HIDDEN AGENCY LTD | London | A rating |
| Hidden Art Cave Limited | London | A rating |
| Hidden Botanics LTD | Norwich | A rating |
| Hidden Hearing Ltd | Maidstone | A rating |
| HIDDEN POEM LTD | London | A rating |
| Hidden Road Partners UK LLP | London | A rating |
| HIDDEN TALENT BOOKING | DARLINGTON | A rating |
| Hiddenwell Limited | Moreton-in-Marsh | A rating |
| Hiden Japanese Curry Lab | London | A rating |
| Hideout Leather (2001) Ltd | Ashdon | A rating |
| Hidrostal GB Ltd | Castleford | A rating |
| Hien Le & Co Limited | Enfield | A rating |
| Hierachy Business Solutions Limited | Livingston | A rating |
| HiETA Technologies Limited | Bristol | A rating |
| Hiex Derry Operations Ltd | Londonderry | A rating |
| Hifi Accessories UK Ltd | Southall | A rating |
| HiFX Europe Limited | Bracknell | A rating |
| HIFZA FOODS LIMITED | London | A rating |
| HIFZA NEWS | Middlesbrough, | A rating |
| Higgins Car Dismantlers | Coleraine Garvagh | A rating |
| Higgins Fairbairn & Co | London | A rating |
| HIGGINS MECHANICAL SERVICES LTD | Uxbridge | A rating |
| HIGGINSONGREY LIMITED | London | A rating |
| Higgs Flavour Project Limited | Harrow | A rating |
| HIGH ACRES STORES LTD | KINGSWINFORD | A rating |
| High Aims Training Ltd | Ilford | A rating |
| HIGH BRAND LINK LIMITED | COVENTRY | A rating |
| HIGH BURTON VILLAGE STORES LTD | Huddersfield | A rating |
| High Commission for Pakistan, London | London | A rating |
| High Commission for Saint Lucia | London | A rating |
| High Commission for the Republic of Cameroon to the UK | London | A rating |
| High Commission of Brunei Darussalam | London | A rating |
| High Commission of Canada | London | A rating |
| High Commission of Maldives | London | A rating |
| High Commission of Namibia | London | A rating |
| High Commission of the Republic of Cyprus in the UK | London | A rating |
| HIGH CROSS SERVICE STATION LIMITED | Ware | A rating |
| High Digital Limited | London | A rating |
| HIGH END BEDS LTD | DEWSBURY | A rating |
| HIGH END INTERIOR DECORATION UK LTD | Welwyn Garden City | A rating |
| HIGH ERCALL STORE LIMITED | Telford | A rating |
| High Farm Convenience Store Limited | Newcastle upon Tyne | A rating |
| High Finance (UK) Limited | London | A rating |
| HIGH FIVE ORIENTAL LIMITED | London | A rating |
| HIGH FIVE PRODUCTIONS LIMITED | Aldershot | A rating |
| High Fly Trapeze Ltd | London | A rating |
| High Flying Food Ltd | LUTON | A rating |
| HIGH GARRETT PROPERTIES LIMITED | Braintree | A rating |
| HIGH GLORY ASSOCIATES LIMITED | Dartford, England | A rating |
| High Green Medical Practice | Nottingham | A rating |
| High Ground Investment Management LLP | London | A rating |
| HIGH HEATON RETAIL LIMITED | Newcastle Upon Tyne | A rating |
| High Oak Care Ltd | Brierley Hill | A rating |
| High Pastures Surgery | Liverpool | A rating |
| High Peak Carers Ltd | Buxton | A rating |
| HIGH PEAK PUBLISHING LIMITED | Birmingham | A rating |
| High Performance Life Limited | London | A rating |
| High Performance Sports Ltd T/A | London | A rating |
| High Point Solutions Limited | Greenford | A rating |
| High Points Youth Ballet C.I.C. | Newtownabbey | A rating |
| High Praise Chapel | London | A rating |
| High Quality Food London Limited | London | A rating |
| HIGH ROAD POSTAL SERVICES LIMITED | Nottingham | A rating |
| High Scream Limited | London | A rating |
| High Spec Windows & Conservatories Ltd | Oldbury | A rating |
| High Speed Engineering Ltd | WEST BROMWICH | A rating |
| High Speed Rail Solutions | Swindon | A rating |
| High Speed Training Limited | Ilkley | A rating |
| High Standard LTD | Rochdale | A rating |
| HIGH STREET CONVENIENCE | WILTSHIRE | A rating |
| High Street Dental Practice | Walsall | A rating |
| High Street Dental Practice | Gloucestershire | A rating |
| HIGH STREET HEALTHCARE LTD | ROTHERHAM | A rating |
| High Street Premier | Lincoln | A rating |
| High Street Smiles Ltd | Warrington | A rating |
| High Street Surgery | Golborne | A rating |
| High Street Surgery | Dover | A rating |
| High Street Surgery | Lurgan | A rating |
| High Street Surgery | Lowestoft | A rating |
| HIGH STREET SURGERY | Hornchurch | A rating |
| High Tech Expert Ltd | Clacton-On-Sea | A rating |
| High Temperature Material Systems (HTMS) | Malmesbury | A rating |
| High Tor Hotel Limited | Matlock | A rating |
| HIGH TREES GARDEN AND LEISURE LIMITED | leeds | A rating |
| HIGH VISSION UK LTD | Tyldesley | A rating |
| HIGH VOLTAGE SUBSTATION SERVICES LIMITED | RICKMANSWORTH | A rating |
| High Wray Residential Care Home | Ormskirk | A rating |
| High Wycombe Specsavers Hearcare Limited | High Wycombe | A rating |
| HIGH-LEVEL CONSULTING LTD | London | A rating |
| HIGH-TECH IT LIMITED | Chessington | A rating |
| High-Tech Membrane Roofing Ltd | Benfleet | A rating |
| High-Tech MOT'S LTD | Stoke-On-Trent | A rating |
| Highacre Homes Ltd | Surrey | A rating |
| HIGHAMS SAAZ LLP | THEALE | A rating |
| Highborder Care Home Gloucestershire Limited | Stroud | A rating |
| Highbourne Group | Crick | A rating |
| HIGHBRIDGE EDUCATION LTD | London | A rating |
| Highbrook Investors UK Limited | London | A rating |
| Highbrow Logistics ltd | Whyteleafe | A rating |
| HIGHBROWINFOTECH LIMITED | Snodland | A rating |
| Highbury Community Nursery | London | A rating |
| Highbury Fine Food & Wine Limited | London | A rating |
| Highbury Local Limited T/A Highbury Food & Wine Corner | London | A rating |
| HIGHBURY POULTRY FARM PRODUCE LIMITED | Oswestry | A rating |
| Highclere Stud Limited | Newbury | A rating |
| Highcliffe Rest Home | Chorley | A rating |
| Highcrest Academy | High wycombe | A rating |
| Highcroft Care Home | Weston Super Mare | A rating |
| Highcroft Surgery | Nottingham | A rating |
| HIGHCROSS LAW (LEICESTER) LTD | Leicester | A rating |
| Highdecora Furnishing Limited | Greenford | A rating |
| Highem Limited | Leicester | A rating |
| Higher Concept Software Limited | Reading | A rating |
| Higher Ed Partners Limited | Brighton | A rating |
| Higher Health U.K. Limited | Preston | A rating |
| Higher Healthcare Ltd | Epsom | A rating |
| HIGHER JUMP LOGISTICS LTD | Northampton | A rating |
| Higher Level Care | London | A rating |
| Higher Oak Consulting Limited | London | A rating |
| Higher Orbit Limited | Birmingham | A rating |
| HIGHER TRANMERE EXPRESS | BIRKENHEAD | A rating |
| Higher Walton Kebabs Ltd | Preston | A rating |
| Highercroft News Limited | Blackburn | A rating |
| Highfield Awarding Body for Compliance Ltd | Doncaster | A rating |
| Highfield Clinic Ltd | Birmingham | A rating |
| HIGHFIELD CRICKET CLUB | WIGAN | A rating |
| Highfield Dental Practice | Cumbria | A rating |
| Highfield House Residential Care Home Limited T/A Highfield House | Isleworth | B rating |
| Highfield Park Management (Hampshire) Limited | Hook | A rating |
| HIGHFIELD ROAD OFFLICENCE LTD | Kettering | A rating |
| Highfield Surgery | Leicester | A rating |
| Highgate Advisory Ltd | London | A rating |
| Highgate Care Services (2025) LTD | Bridlington | A rating |
| Highgate Care Services (Yorkshire) Limited | Carnaby | A rating |
| HIGHGATE CARE SERVICES LTD | Bridlington | A rating |
| Highgate Cricket and Lawn Tennis Club | London | A rating |
| Highgate Dental Centre | HIGHGATE | A rating |
| Highgate Dog Grooming Limited | Dunstable | A rating |
| Highgate Hotels International Ltd. | London | A rating |
| HIGHGATE MARKET LTD | Birmingham | A rating |
| Highgate Poultry Products Ltd | Birmingham | A rating |
| Highgate School | London | A rating |
| Highgate Transportation Ltd | Bristol | A rating |
| HIghgrove Beds Ltd | Liversedge | A rating |
| Highgrove House Care Home Ltd | Worthing | A rating |
| Highgrove Rest Home (Blackpool) Ltd | Blackpool | A rating |
| Highland Aviation Training Ltd | Inverness | A rating |
| HIGHLAND CARE UK LIMITED | LONDON | A rating |
| Highland Europe UK Management Limited | London | A rating |
| Highland Home Carers | Inverness | A rating |
| Highland Hospice | Inverness | A rating |
| Highland Hospitality Ltd t/a The Fig & Thistle | Inverness | A rating |
| Highland House Residential Home Limited | Canterbury | A rating |
| Highland Motors Ltd | Portree | A rating |
| HIGHLAND ORNATE LTD. T/A ORNATE HEALTHCARE | BRIGHT ROAD | A rating |
| Highland Smoked salmon Ltd | FORT WILLIAM | A rating |
| Highland Sporting Estate (Mr Mark JAM Diks) | Tomintoul | A rating |
| HIGHLAND STORE GRS LTD | London | A rating |
| Highlander Computing Solutions Ltd | Sheffield | A rating |
| Highlands and Islands Airports | Inverness | A rating |
| Highlands and Islands Students' Association | INVERNESS | A rating |
| Highlands Borders Care Home Ltd | Exeter | A rating |
| Highlands Care Ltd | Orpington | A rating |
| Highlands Care Solutions Limited | Sevenoaks | A rating |
| Highlands Horizon Ltd | Cannock | A rating |
| Highlands Properties Holdings Limited | Watford | A rating |
| Highlands school | London | A rating |
| Highlands Surgery | Leigh-on-Sea | A rating |
| Highlands Unbridled Ltd | Aboyne | A rating |
| HIGHLIFE TRADE EXPRESS LIMITED | Manchester | A rating |
| HIGHLINKED LTD T/A MUFFIN BREAK | WIGAN | A rating |
| HIGHLY FAVOURED MINISTRIES | BECKENHAM | A rating |
| Highly Marelli UK Limited | Sunderland | A rating |
| Highmead House Limited | Irthlingborough | A rating |
| Highparks Medical Practice | Rochester | A rating |
| Highpoint Care | Liverpool | A rating |
| Highpoint Construction Limited | Bromham | A rating |
| HighRadius UK Limited | London | A rating |
| HighRes Biosolutions Ltd | Manchester | A rating |
| Highroads NI Limited | Belfast | A rating |
| Highspot UK Limited | London | A rating |
| Highstead Consulting Limited T/A Highstead Partners Limited | London | A rating |
| HIGHTEKERS SERVICES LTD | London | A rating |
| Hightest Technology Limited | Hampton | A rating |
| Hightown St. Mary's Cricket Club | Liverpool | A rating |
| Hightown Tandoori | Wrexham | A rating |
| Highvern UK Limited | London | A rating |
| Highview Enterprises Ltd | London | A rating |
| Highview Ltd | Sevenkings | A rating |
| Highview Montessori Ltd | New Barnet | A rating |
| HIGHVIEW MOTORS LTD | LONDON | A rating |
| HIGHWAY COACHES LIMITED | Slough | A rating |