| Olive Tree Day Nursery And School Ltd | Croydon | A rating |
| OLIVE TREE DENTAL LIMITED | READING | A rating |
| Olive Tree High Wycombe LTD | High Wycombe | A rating |
| Olive Tree Milton Keynes LTD | milton keynes | A rating |
| Olive Tree Takeaway (Glasgow) Limited | Glasgow | A rating |
| Olive Tree Veterinary Surgery | Charing | A rating |
| Olive's Cypriot Street Food Ltd | Crewe | A rating |
| OLIVEHEAL HEALTHCARE LTD | London | A rating |
| Olivello Ristorante & Bar Ltd | MIDDLESBROUGH | A rating |
| Oliveoaks Consulting Ltd | Aberdeen | A rating |
| Oliver & Co Solicitors | Chester | A rating |
| Oliver & Co Solicitors Limited | Chester | A rating |
| Oliver Aesthetics Limited | London | A rating |
| Oliver Bedding Limited | Rochdale | A rating |
| Oliver Chapman Architects Ltd | Edinburgh | A rating |
| Oliver Charles Solicitor | Leicester | A rating |
| Oliver Connell & Son Ltd | Perivale | A rating |
| Oliver Heer Ocean Racing Ltd | Gosport | A rating |
| Oliver House Kirk Hallam Ltd | Ilkeston | A rating |
| Oliver James Associates Limited | London | A rating |
| Oliver James Homes Ltd | Guildford | A rating |
| Oliver Law Security Ltd | Doncaster | A rating |
| Oliver Marketing | London | A rating |
| OLIVER ROBERTS LTD | LONDON | A rating |
| OLIVER SERVICES LTD | Willenhall | A rating |
| Oliver Sweeney UK Limited | London | A rating |
| Oliver Townend Eventing Ltd | Ellesmere | A rating |
| Oliver Walton Ltd | London | A rating |
| Oliver Wyman Limited | London | A rating |
| OLIVER'S FISH BAR LIMITED | West Midlands | A rating |
| Olivers Residential Ltd | London | A rating |
| OLIVERS TRAVELS LIMITED | LONDON | A rating |
| Olives Healthcare Services Ltd | Welling | A rating |
| Olivet Assembly | Uckfield | A rating |
| Oliveta Limited | Harrogate | A rating |
| Olivewood Ltd | Harrow | A rating |
| OLIVIA FASHION DESIGN LIMITED | London | A rating |
| OLIVIAN HOMES LTD | Epsom | A rating |
| Olivibra UK Ltd | Nottingham | A rating |
| OLIVIER JULLIAN CONSULTANT LTD | London | A rating |
| Olix Computing Limited | London | A rating |
| Oliyil Traders Ltd | London | A rating |
| OLIZ LTD | London | A rating |
| Olleco | Northampton | A rating |
| OLLIE CARE ALLIANCE LTD | MANCHESTER | A rating |
| Ollie Owl LTD | Chesham | A rating |
| Ollie's House Limited | London | A rating |
| Ollier Smurthwaite Architects Limited | Manchester | A rating |
| Ollies kebab (Lingfield) Ltd | Orpington | A rating |
| OLLIEWOOD LIMITED | Brighton | A rating |
| OLLU ENTERPRISE LTD | London | A rating |
| OLM FRESH FISH LIMITED | London | A rating |
| OLR (UK) LIMITED | London | A rating |
| OLS Group Limited T/A Out Lane Social | Leyland | A rating |
| Olsam Opco Limited | London | A rating |
| Olsberg/SPI Limited | London | A rating |
| Olsen Actuation UK Ltd | Warrington | A rating |
| Olsights LTD | London | A rating |
| Olton and West Warwickshire Cricket Club | Solihull | A rating |
| Olut Services Ltd | Bognor Regis | A rating |
| OLUTO UK HOLDINGS LIMITED | Canterbury | A rating |
| Olvin Limited | London | A rating |
| Olympia Emberton Hotel Limited t/a Hyatt Regency London Olympia | London | A rating |
| Olympia Estate Services Limited | London | A rating |
| OLYMPIA FOODS T/A KRYSTALS | LONDON | A rating |
| OLYMPIAA LTD | LEICESTER | A rating |
| Olympus Automation Limited | Peterborough | A rating |
| Olympus Dairy UK Ltd | Wolverhampton | A rating |
| Olympus Opco Ltd | Colchester | A rating |
| Olyvon Limited | London | A rating |
| OM Beers & Minerals Ltd T/A M G Beers & Minerals | Iver | A rating |
| Om Bikes Limited | Wembley | A rating |
| OM BIKES SERVICES LIMITED | Harrow | A rating |
| OM CARE LIMITED | Coulsdon | A rating |
| Om Cash & Carry Ltd | Wembley | A rating |
| OM CONSTRUCTION SERVICES LIMITED | Luton | A rating |
| Om Creatives Ltd | London | A rating |
| Om Durham Limited | Northampton | A rating |
| Om Fashion Ltd | BIRMINGHAM | A rating |
| OM FOOD & WINE LIMITED | LONDON | A rating |
| OM FUNERAL CARE LTD | London | A rating |
| OM GANESH FOREST LTD | Lyndhurst | A rating |
| Om Haan Limited T/A Goa Indian Takeaway | Southampton | A rating |
| OM JEWELLERS (LONDON) LTD T/A OM SAI JEWELLERS | Hounslow | A rating |
| Om Laxmi Sairam Ltd | Wembley | A rating |
| OM LOG (UK) LTD | Brentwood | A rating |
| Om Medical Centre | Sheerness | A rating |
| Om Mobile Ventures (UK) Limited | London | A rating |
| Om Namo Namah Ltd t/a Taste of Kathmandu | Kent | A rating |
| OM NSP FOODS LTD | Northampton | A rating |
| Om Restaurant Ltd | Aldershot | A rating |
| OM RETAIL UK LIMITED | READING | A rating |
| OM RETAILERS LTD | PETERHEAD | A rating |
| Om Retrofit Ltd | Harrow | A rating |
| OM SAI CONVENIENCE STORE LTD | Andover | A rating |
| OM SAI International Ltd | Amersham | A rating |
| OM SAI KRUPA LTD | BRISTOL | A rating |
| Om Sai Ram Store Ltd (T/A Prince of Wales Food & Wine) | Birmingham | A rating |
| OM SAI RETAIL SHOPS LIMITED | HARROW | A rating |
| OM SAI TRADING LTD | Leicester | A rating |
| Om Sairam Food Limited | Liverpool | A rating |
| Om Saravanabhava Seva Trust | LONDON | A rating |
| OM Soft Solutions Limited | Elstree | A rating |
| Om Sushi Ltd | Lewisham | A rating |
| OM SWEET AND SAVOURIES LTD | Aldershot | A rating |
| Om Synergies Limited | Birmingham | A rating |
| OM Ventures Capital Limited | London | A rating |
| Om Wines Ltd T/A Om Wines | London | A rating |
| OM2CARELTD | South Croydon | A rating |
| Omada Subs Ltd | Ballyclare | A rating |
| Omagh Aluminium Systems Ltd | Omagh | A rating |
| Omah International Ltd (Operating Address) | Manchester | A rating |
| OMAIRA CONSULTING GROUP LTD | London | A rating |
| OMAKASE JAPANESE RESTAURANT LTD | Basingstoke | A rating |
| Omakase Mayfair Limited | London | A rating |
| Oman Air S.A.O.C | London | A rating |
| OMANES CARE LIMITED | CAMBRIDGE | A rating |
| Omanos Analytics Ltd | Glasgow | A rating |
| OMAP & CO LTD T/A WALL 2 WALL | Kidderminster | A rating |
| Omar Exotic Foods Limited | Barking, London | A rating |
| OMAR FAROOK KHAN T/A MEGHNA TANDOORI RESTAURANT | LONDON | A rating |
| Omar Khayyam Restaurant | Edinburgh | A rating |
| Omar Retail Ltd | Falkirk | A rating |
| Omar Sheikh T/A Pepe`s Peri Peri | Hendon | A rating |
| Omar`s Balti House Ltd | Bradford | A rating |
| OMARMAYAR LIMITED | Lancaster | A rating |
| OMass Therapeutics Limited | Oxford | A rating |
| OMAX IT SOLUTION LTD | London | A rating |
| Omaze UK Limited | London | A rating |
| OMB Construction Limited | Wembley | A rating |
| OMB Partnership Limited | Camberley | A rating |
| OMBA Advisory & Investments Limited | London | A rating |
| Ombersley Cricket Club | Worcestershire | A rating |
| OMCB CO LTD | London | A rating |
| Omeda Studios Limited | Northwood | A rating |
| OMEGA + GROUP LTD | London | A rating |
| Omega BaaP Limited | London | A rating |
| Omega Building Supplies Ltd T/A Omega Drywall & Insulation | Walsall | A rating |
| OMEGA BUSINESS SERVICES LIMITED | DONCASTER | A rating |
| Omega Care Group Ltd | Liverpool | A rating |
| OMEGA CRUSHING AND SCREENING LIMITED | Omagh | A rating |
| Omega Diagnostics Ltd | Littleport | A rating |
| OMEGA ENGINEERING & CONSULTANCY GROUP LIMITED | Portchester, Fareham | A rating |
| Omega Flex Limited | Banbury | A rating |
| Omega Group0 Ltd | Slough | A rating |
| OMEGA HOME IMPROVEMENTS LTD | Nottingham | A rating |
| Omega Ingredients | Ipswich | A rating |
| Omega International LLC | Letchworth Garden City | A rating |
| Omega Lift Services Ltd | Captains Road | A rating |
| Omega Maintenance Services Limited | Morden | A rating |
| Omega Oak Barn Care Home | Beadlam | A rating |
| OMEGA PHARMA LTD t/a PERRIGO UK & IRELAND | LONDON | A rating |
| Omega Pretzels UK Ltd | Watford | A rating |
| Omega Proteins Limited | Halifax | A rating |
| Omega Rentals Oxford Ltd | Harrow | A rating |
| Omega Sinto Foundry Machinery Limited | Peterborough | A rating |
| Omega Subsea UK Limited | Westhill | A rating |
| Omega worldwide Logistics Solutions Limited | Slough | A rating |
| Omega X Systems Ltd | Watlington | A rating |
| Omena Creative LTD | Stoke-on-Trent | A rating |
| Omer Tiroche gallery ltd | London | A rating |
| OMERS Europe Limited | London | A rating |
| OMERS Infrastructure Europe Limited | LONDON | A rating |
| OMERS Private Equity Europe Limited | London | A rating |
| Ometis Ltd | Market Harborough | A rating |
| OMEX Agriculture Ltd. | Lincoln | A rating |
| Omex Environmental Limited | King's Lynn | A rating |
| Omex Property Services Ltd | Luton | A rating |
| OMF International | Manchester | A rating |
| OMFIF Ltd | London | A rating |
| OMG CONSULTING LTD | LONDON | A rating |
| OMG How Cheap Limited | Witham | A rating |
| OMG Marketing Ltd | London | A rating |
| OMG Racing Ltd | Stratford-upon-Avon | A rating |
| OMI BAR LTD | Leicester | A rating |
| OMIA RETAIL LTD | Cambridge | A rating |
| OMICRON electronics UK Limited | Stafford | A rating |
| Omim Technology Limited t/a Mimo | London | A rating |
| Omio Travel (UK) Ltd | Reading | A rating |
| Omisha Plant Food Ltd | London | A rating |
| OMK Limited | Carlisle | A rating |
| OMKA ENERGY LTD | London | A rating |
| Omkaar Limited | Southampton | A rating |
| Omkaar Systems Limited | Borehamwood | A rating |
| Omkar Traders Ltd | Wembley | A rating |
| OML Belfast Limited | Belfast | A rating |
| Omlet Ltd | Banbury | A rating |
| OMM & KHUSHI HOSPITALITY LTD | BATH | A rating |
| OMMAX GMBH | London | A rating |
| Omnam Investment Group UK LTD | London | A rating |
| Omnam UK Limited | London | A rating |
| Omnav Limited T/A Chris's Motel | High Wycombe | A rating |
| Omnea Limited | London | A rating |
| Omnes Europe Limited | London | A rating |
| Omnes Healthcare Limited | London | A rating |
| Omni Bridgeway (UK) Limited | London | A rating |
| Omni Commerce Limited | Chilworth | A rating |
| Omni Concept Ltd | London | A rating |
| OMNI CORPORATE SOLUTIONS LIMITED | LONDON EC3A 7AG | A rating |
| Omni Facilities Management Limited | London | A rating |