| Old Butcher's Wine Cellar LimitedCookham, United Kingdom · UKoldbutcherswinecellar.co.uk · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2012 |
| Old Chapel CellarsExeter, United Kingdom · oldchapelcellars.co.uk · checked 1 Nov 2026 | | – | 46 | France, Italy, AustraliaTerre Siciliane, Stellenbosch | –Mid (producers) | 9% | 2020 |
| Oldbourne & Oldbourne Hospitality LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2015 |
| Olivanna London LtdLondon, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Oliver and Bird LtdPaignton, United Kingdom · UKoliverandbird.co.uk · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2004 |
| Oliver Burridge & Co LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1937 |
| Olivers Beer and Wine LtdMinster, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2005 |
| Oliveto & Olivo LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1982 |
| Omb Tax LimitedTunbridge Wells, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2003 |
| Omniawine LtdWoodford Green, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2023 |
| On Cloud Wine Za LtdThames Ditton, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| On Wheels Group LtdArdwick, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2024 |
| One Green Barrel LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| One More Wine Shop LtdNorthallerton, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| One Stop Stores LimitedWalsall, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1990 |
| One To Wine LimitedLondon Colney, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2015 |
| Oneadvanced Group LimitedBirmingham, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Ooberstock LimitedDartford, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2010 |
| Opatra LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2010 |
| Open House London LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2013 |
| Oppermann London LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2012 |
| Ops Wines LtdLondon, United Kingdom · UKopswines.co.uk · checked 28 Oct 2026 | UK | 0 | – | – | –Fine (producers) | – | 2018 |
| Options Group LtdEdgware, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1999 |
| Oqema LtdCarterton, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Oracle Fine Wines LimitedWorthing, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2018 |
| Orange Pack LtdCorby, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2015 |
| Orbit Brewing LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2013 |
| Orbit Wines LimitedBrighton, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2017 |
| Orchard Global Asset Management LLPLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2008 |
| Orchard-Lisle WinesSaxmundham, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2018 |
| Organic Grape Spirit LtdAshford, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2019 |
| Organica Food & Wine LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2015 |
| Oriental China Garden LimitedNorthampton, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Oriental Club LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2014 |
| Oriental Drinks LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2016 |
| Origin Wine LtdBanbury, United Kingdom · UKorigin.wine · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2004 |
| Original Wooden Case LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2014 |
| Orlando's Fine Foods LtdAylesbury, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2020 |
| Ormos Trades LtdWatford, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2012 |
| Orthodox Heritage LtdBracknell, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2025 |
| Osa Fine Spirits LtdUnited Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2003 |
| Osteria Ovada LtdLondon, United Kingdom · UKosteriaovada.com · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| Other World Wines LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2018 |
| Otros Vinos LtdStockport, United Kingdom · UKotrosvinos.co.uk · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2015 |
| Ottolenghi LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2002 |
| Our Sommelier LtdLondon, United Kingdom · UKoursommelier.com · checked 28 Oct 2026 | UK | 0 | – | – | – | – | 2013 |
| Outernet Venue LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2021 |
| Overseas Courier Service LimitedColnbrook, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 1972 |
| Owt LtdLeeds, United Kingdom · UKchecked 26 Oct 2026 | UK | 0 | – | – | – | – | – |
| Oxford and Cambridge ClubLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 0 | – | – | – | – | 2019 |