| Rhino Wines LtdCoventry, United Kingdom · UKrhinowines.co.uk · checked 28 Oct 2026 | UK | 1 | – | – | – | – | 2024 |
| Rhone Group LLPLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2006 |
| Rhytik Leisure LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2017 |
| Richmond Street Productions UK LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2022 |
| Riello Ups LtdWrexham, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2002 |
| Right Formula LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2009 |
| Riley Scooters LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2020 |
| Riva South LimitedEastleigh, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1989 |
| Rivage Vin LimitedRugby, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2026 |
| Road and Race Automotive LtdDereham, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2019 |
| Rocca Mora LtdUnited Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2009 |
| Rochem Fyrewash LtdWinchester, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1983 |
| Rocket Food LtdBirmingham, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2000 |
| Rok Drinks LimitedAlbrighton, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2012 |
| Roland Dg LtdBristol, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2001 |
| Ronly Group LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2007 |
| Rothenberger LtdKettering, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1971 |
| Royal Mail Group LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2001 |
| Royle Forest Weddings LimitedBurton-on-Trent, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2019 |
| Rsi.sw LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2021 |
| Rubelli LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1957 |
| Rubicer Scotland LimitedFraserburgh, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2013 |
| Rubix Industrial Services LimitedOldbury, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1995 |
| Ryder Cup Europe LLPSurrey, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2004 |
| Sacla UK LtdBeaconsfield, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1991 |
| Saf LtdNormandy, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1993 |
| Safestore LtdBorehamwood, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2005 |
| Saint John Jacob the Romania N Fromhozeva FoundationLeighton Buzzard, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2014 |
| Saison Wines LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2024 |
| Salento Food and Wine LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2018 |
| Santa Rita Europe LimitedOxford, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2003 |
| Sapori LtdLeeds, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2015 |
| Scarab Sweepers LtdTonbridge, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1984 |
| Schenker LtdHounslow, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1943 |
| Scott and Newman LtdShrewsbury, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1973 |
| Scrawny Al LtdFrome, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1995 |
| Sdh Enterprise LimitedExeter, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2019 |
| Seabrook Wines LimitedOxford, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2012 |
| Seaco Global LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1998 |
| Sealing Solutions LtdBraintree, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1997 |
| Seaport Freight Services LtdFelixstowe, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1981 |
| Seasoned Events LimitedOngar, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2000 |
| Seewoo Chinatown LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2017 |
| Sefar LtdBury, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1985 |
| Selection Prestige GMBHBerlin, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2013 |
| Send & Receive Worldwide Express UkltdUxbridge, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2012 |
| Sete LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2012 |
| Seven Heaven Trading LtdLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2023 |
| Shajan Indian Restaurant LtdBlackburn, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 1998 |
| Shanghai Me Restaurant LimitedLondon, United Kingdom · UKchecked 28 Oct 2026 | UK | 1 | – | – | – | – | 2024 |