| HC Operations Limited | London | A rating |
| HC Restaurants Limited | Cheltenham | A rating |
| HC-One Limited | Darlington | A rating |
| HC-One Management Limited | Darlington | A rating |
| HCA Chartered Accountants Ltd | Belfast | A rating |
| HCA International Ltd | London | A rating |
| HCC 2015 Ltd | Harpenden | A rating |
| HCC Oxford Partners Limited | London | A rating |
| HCC Service Company Inc | London | A rating |
| HCD Economics limited | Knutsford | A rating |
| HCD Research Limited | Burgess Hill | A rating |
| HCF International Advisers Limited | London | A rating |
| HCF Poultry Ltd | Bradford | A rating |
| HCISS Ltd T/A Pepes Piri Piri | Cambridge | A rating |
| HCJB-UK Limited | Bradford | A rating |
| HCL Formwork & Civil Engineering Ltd | Iver | A rating |
| HCL Technologies UK Limited | London | A rating |
| HCL(Holistic Care) Ltd | Maritime Way, Chatham | A rating |
| HCMS 10 LIMITED | Birmingham | A rating |
| HCMS7 Limited | Birmingham | A rating |
| HCN UK Management Services Limited T/a Welltower | London | A rating |
| HCP (Franchise) Ltd | London | A rating |
| HCP Advisors Limited | London | A rating |
| HCP MBS Studios UK Ltd | Slough | A rating |
| HCP Packaging UK Limited | Bournemouth | A rating |
| HCR Legal LLP | Worcestershire | A rating |
| HCRG Care Limited | Runcorn | A rating |
| HCRG Care Services Limited | Runcorn | A rating |
| HCRG TFS Limited | London | A rating |
| HCT EUROPE LTD | London | A rating |
| HCV International Limited | Woking | A rating |
| HCV Network | Oxford | A rating |
| HD Accountancy Services Ltd | Huddersfield | A rating |
| HD Bolton Ltd T/A Haute Dolci | Bolton | A rating |
| HD Clinical Ltd | Bishop's Stortford | A rating |
| HD Connectivity Ltd | Malvern | A rating |
| HD CONSTRUCTIONS (LONDON) LIMITED | London | A rating |
| HD Derby Ltd T/A Heavenly Desserts Derby | Derby | A rating |
| HD FOOD AND FUEL LTD | Leigh | A rating |
| HD Harrow Limited T/A Haute Dolchi | Harrow | A rating |
| HD HUB LTD | London | A rating |
| HD Hyundai Electric UK | London | A rating |
| HD Hyundai Heavy Industries Co., Ltd | London | A rating |
| HD KOREA SHIPBUILDING & OFFSHORE ENGINEERING CO., LTD | London | A rating |
| HD LEEDS LIMITED | Leeds | A rating |
| HD LIVERPOOL ONE LTD | Liverpool | A rating |
| HD Oxford Ltd | Headington | A rating |
| HD ROTHERHAM LTD T/A HEAVENLY DESSERTS | Rotherham | A rating |
| HD Star City Ltd T/A Haute Dolci | Birmingham | A rating |
| HD Trafford Limited T/A Haute Dolchi | Manchester | A rating |
| HD Watford Ltd T/A Haute Dolci Watford | England | A rating |
| HD Wembley Limited T/A Haute Dolci Wembley | Wembley | A rating |
| HD York Ltd | York | A rating |
| HD2 CARE SUPPORT SERVICES | CRAYFORD | A rating |
| HDCATERING LTD T/A The Voujon | London | A rating |
| HDDA Ltd | London | A rating |
| HDI GLOBAL SE - UK BRANCH | London | A rating |
| HDL Executive Search LLP | London | A rating |
| HDL LAB LTD T/A H D L DENTAL LABORATORY | Falkirk | A rating |
| HDM Gallery Ltd | London | A rating |
| HDOP Limited TA The Real China | Hatfield | A rating |
| HDR Consulting Limited | London | A rating |
| HDS NEWS LIMITED | Harrogate | A rating |
| HDX RETAIL LTD | Motherwell, | A rating |
| HE & K PARTNERSHIP | MAGHERAFELT | A rating |
| HE LIVES BIBLE CHURCH | MILTON KEYNES | A rating |
| HE Space Operations Limited | Didcot | A rating |
| Heacham Group Practice | King's Lynn | A rating |
| Head Ahead Ltd | Grantham | A rating |
| HEAD GEAR FILMS FN LIMITED | London | A rating |
| Head of Grace Christian Network | North Shields | A rating |
| Head of People & Culture | Worthing | A rating |
| Head office - Ridge House Residential Home Limited | Crediton | A rating |
| Head Quarters Hair Transplants Limited | Cardiff | A rating |
| HEAD SCARF SHOP LIMITED | Luton | A rating |
| Head Tailor Hair & Beauty Salon Ltd | London | A rating |
| Head Threads Limited | Cardiff | A rating |
| Head UK Limited | Kendal | A rating |
| Headboards Ltd | Berkhamsted | A rating |
| HeadBox Solutions Ltd | London | A rating |
| Headford Limited | London | A rating |
| HEADHUNTING EXPERTS MANAGEMENT LTD | London | A rating |
| Headingley Lane Store Limited T/A Headingley Lane Store | Leeds | A rating |
| Headington Healthcare LTD | Oxford | A rating |
| Headington School Oxford Ltd | Oxford | A rating |
| Headland Consultancy Limited | London | A rating |
| Headlands Tech UK Limited | London | A rating |
| Headlane Ltd | London | A rating |
| Headline (England) LLP | London | A rating |
| Headlong Theatre | Oxford | A rating |
| Headout UK Ltd | London | A rating |
| Headroomgate Limited | Lytham St Annes | A rating |
| Headspace Meditation Limited | London | A rating |
| Headspin UK Limited | London | A rating |
| Headspring Ltd. | London | A rating |
| Headstart Nursery school Limited | Edinburgh | A rating |
| Headstart Residential Care | Ninfield | A rating |
| HeadStart Speech and Behaviour Clinic Ltd | London | A rating |
| Headstone Associates Limited | Ruislip | A rating |
| Headstrong (UK) LTD | London | A rating |
| Headway Capital Partners LLP | London | A rating |
| Headway Index Ltd T/A BooksFinders | Weybridge | A rating |
| Headzpace Therapeutic Care limited | London | A rating |
| Heal Angels Limited | Harrow | A rating |
| Heald Green Ventures Ltd | Manchester | A rating |
| Healds Road Surgery | Dewsbury | A rating |
| Heales Enterprises Ltd. | Hitchin | A rating |
| Healing Hands Care Solutions Limited | MANCHESTER | A rating |
| Healing Point | Glasgow | A rating |
| Healing Space | Sheffield | A rating |
| Healing Touch Care Limited | Andover | A rating |
| Healing Waters (Company) Ltd | Glasgow | A rating |
| Healix International Limited | Esher | A rating |
| HEALTEAM LIMITED | Kent | A rating |
| Health & Beyond Limited | Wolverhampton | A rating |
| Health & Glamour Limited | Wigston | A rating |
| Health & Safety Executive | Bootle | A rating |
| Health & Social Care Services Ltd | Fareham | A rating |
| HEALTH & VISION LIMITED | Sale | A rating |
| Health and Beyond Partnership | Wolverhampton | A rating |
| Health and Happiness (H&H) UK ltd | London | A rating |
| HEALTH AND HOME (ESSEX) LIMITED | SOUTHEND ON SEA | A rating |
| Health and Longevity Optimisation Limited (t/a HOOKE) | London | A rating |
| Health and Vitality Centre Ltd | Welwyn Garden City | A rating |
| HEALTH AND WELLBEING CARE SERVICES LIMITED | Manchester | A rating |
| Health Assist Limited | Leeds | A rating |
| Health Bridge Limited (trading as Zava) | London | A rating |
| HEALTH CARE & SUPPORT LTD | Telford | A rating |
| Health Care First Ltd. T/A Newman Chemist | Surbiton | A rating |
| Health Care First Partnership | Leeds | A rating |
| Health Connections PTS Ltd | Great Yarmouth | A rating |
| Health Consultants International Ltd | Oxford | A rating |
| Health Data Insight CIC | Cambridge | A rating |
| Health Dispense Limited T/A Sharmans Pharmacy | Northwood | A rating |
| Health Education England | Birmingham | A rating |
| Health HQ Ltd | Portsmouth | A rating |
| HEALTH HUT PROFESSIONALS LTD | Morpeth | A rating |
| Health Innovations Holdings Ltd | Harrow | A rating |
| Health Innovations UK Ltd | Skipton | A rating |
| Health iQ | London | A rating |
| Health is Wealth Ltd | Manchester | A rating |
| Health Istanbul London Ltd | London | A rating |
| Health Limited T/A Health Poverty Action | London | A rating |
| HEALTH MAP LTD | London | A rating |
| Health Now Limited | Chertsey | A rating |
| Health Partners Group Ltd | London | A rating |
| HEALTH PERSONNEL LIMITED | Chalton | A rating |
| Health Professionals Recruitment Services Limited | Bromsgrove | A rating |
| Health Sciences University | Bournemouth | A rating |
| HEALTH SHIELD FRIENDLY SOCIETY LIMITED | CREWE | A rating |
| Health Supplies Limited | Harrow | A rating |
| Health Support Berkshire Limited T/A Walfinch Independent Home Living | Caversham | A rating |
| Health Vision UK Ltd | London | A rating |
| HEALTH WE CARE LTD | Birmingham | A rating |
| Health Well Solutions Limited | London | A rating |
| Health-Chem Limited T/A Westdale Pharmacy | Nottingham | A rating |
| HealthAid Ltd | Harrow | A rating |
| Healthcare 1st Choice Limited | whitchurch | A rating |
| Healthcare Business Solutions (UK) Ltd | Sherwood Park | A rating |
| Healthcare Central London | London | A rating |
| Healthcare Concepts Ltd | London | A rating |
| Healthcare Education Student Support Services Limited | Newcastle Upon Tyne | A rating |
| Healthcare Europa Limited | LONDON | A rating |
| HEALTHCARE EVOLUTION LTD | BANBURY | A rating |
| HEALTHCARE HOLDCO LTD | Slough | A rating |
| Healthcare Homes (LSC) Ltd | COLCHESTER | A rating |
| Healthcare Homes (Spring) Limited | Colchester | A rating |
| Healthcare Infection Society | London | A rating |
| Healthcare interAction Limited | Abbotsley | A rating |
| Healthcare Ireland Belfast LTD | Holywood | A rating |
| Healthcare Medical Ltd | MARYPORT | A rating |
| HEALTHCARE OUTCOMES PERFORMANCE COMPANY LIMITED | London | A rating |
| Healthcare Pharmacy Limited | Leicester | A rating |
| HEALTHCARE REPUBLIC LTD | Birmingham | A rating |
| Healthcare Solutions 365 LTD | Mackworth, Derby | A rating |
| Healthcare Trust Ltd | Trebursye | A rating |
| Healthcare World Online Ltd | Wigan | A rating |
| Healthcare-2-u Limited | Edinburgh | A rating |
| HEALTHCHEM BATTERSEA LIMITED | LONDON | A rating |
| Healthcode Limited | Staines-upon-Thames | A rating |
| HealthDek Ltd. | London | A rating |
| Healthera Ltd | Cambridge | A rating |
| Healthgenic Solutions Ltd | Manchester | A rating |
| HealthHarmonie Limited | Edgbaston | A rating |
| HealthHero Group Limited | London | A rating |
| HealthHQ Group Limited | Worcester | A rating |
| Healthier Business UK Ltd | Paisley | A rating |
| Healthier West Wirral PCN Ltd. | Wirral | A rating |
| Healthist Health Consultancy Ltd | LONDON | A rating |
| Healthium Medtech UK Ltd | Borehamwood | A rating |
| Healthme Meds Ltd | Harrow Weald | A rating |
| Healthmoni Limited | London | A rating |
| Healthrites Care Solutions | Aberdeen | A rating |
| Healthside Pharmacy | LONDON | A rating |
| HealthStart Trading Ltd | Bo'ness | A rating |
| HEALTHTAB LTD | MANCHESTER | A rating |
| HEALTHTECH 1 LTD | London | A rating |
| HealthTrust Europe LLP | Birmingham | A rating |
| Healthwatch Lambeth | London | A rating |
| HEALTHWATCH LIMITED | Summertown | A rating |