Newham Business by letter: o
- O Hussain, Newham
- O'Connell Plant & Groundworks, Newham
- O'Farrells Stage School, Newham
- O-Abade Food & Wine, Newham
- O2 Store, Newham
- Oakwood Transport & Distribution, Newham
- Oasis Nursery School, Newham
- Oasis Systems Ltd, Newham
- Oasys Travel Ltd, Newham
- Oblo Global Xpress, Newham
- Ocean, Newham
- Odeon Chinese Take Away, Newham
- Odessa Infant School, Newham
- Office Systems Services Ltd, Newham
- Ok 4 U, Newham
- Ok 4u, Newham
- Old Esthameians Society, Newham
- Oldfields Quality Foods, Newham
- Olivand Metal Windows Ltd, Newham
- Oliver Thomas Nursery School, Newham
- Olli Construction Services, Newham
- Olliss Recruitment, Newham
- Olympus Tiles Ltd, Newham
- On The Safe Side, Newham
- One Love, Newham
- One Spare Chair, Newham
- One Spare Chair (Training) Ltd, Newham
- One Stop Community Stores Ltd, Newham
- One World Foundation Africa, Newham
- Onega Ltd, Newham
- Only Telecom, Newham
- Opera Singer, Newham
- Optical Express, Newham
- Optical World, Newham
- Optik Vision, Newham
- Orange, Newham
- Orange Information Systems Ltd, Newham
- Orbin Wine, Newham
- Orchard Wharf Service Station, Newham
- Organza Events Ltd, Newham
- Orient Design, Newham
- Orient Export, Newham
- Oriental Khazana, Newham
- Oriental Kitchen, Newham
- Our Lady Of Compassion R C Church, Newham
- Outlook Properties, Newham
- Outlook Properties, Newham
- Outlook Property Ltd, Newham
- Outlook Property Management, Newham
- Overdraft Tavern Ltd, Newham
- Overland Hotel, Newham
- Owners Abroad, Newham