| 2020 Property Solutions Ltd | Nr Barry | 2019 |
| 2020 Protection Services Ltd | London | 2015 |
| 2020 Secretarial Services Limited | Southampton | 2026 |
| 2020 SUR AGE Limited | London | 2020 |
| 2020 Surveillance Limited | Burwash | 2001 |
| 2020 Talent Limited | London | 2025 |
| 2020 Umbrella Payroll Limited | Wolverhampton | 2020 |
| 2020 Visio Limited | Altrincham | 2014 |
| 2020 Vision and Automation Ltd | Lincoln | 2019 |
| 2020PLUS Limited | Abingdon | 2008 |
| 203 Freemasons Developments Limited | London | 2017 |
| 2030NETZERO Ltd | Hatton | 2023 |
| 204 Watford Way Limited | London | 2012 |
| 205 Anerley Road Ltd | London | 2015 |
| 205 Group Ltd | Liverpool | 2015 |
| 2073 Films Ltd | London | 2022 |
| 208 B1 Limited | Scunthorpe | 2013 |
| 208 B2 Limited | Scunthorpe | 2013 |
| 208 B3 Limited | North Ferriby | 2014 |
| 208 B4 Limited | Scunthorpe | 2014 |
| 208 B5 Limited | Scunthorpe | 2014 |
| 208 Ladbroke Grove Management Company Limited | London | 1987 |
| 20:09:11 Ltd | Woodford Green | 2015 |
| 20B Roding Ltd | London | 2011 |
| 20SECONDSMEDIA Limited | London | 2019 |
| 20SHOTS Limited | Brighton | 2018 |
| 20THIRTYRECORDS Ltd | Ossett | 2021 |
| 20TWENTY Live Ltd | Birmingham | 2020 |
| 20TWENTYCLEAN Ltd | London | 2023 |
| 20TWENTYCLEANZ CIC | Enfield | 2025 |
| 21 and 22 Stanhope Gardens Management Limited | London | 1982 |
| 21 Consult Ltd | Gravesend | 2019 |
| 21 Consultancy Ltd | Sittingbourne | 2022 |
| 21 Forbes Place Ltd | Paisley | 2009 |
| 21 Golden Square Ltd | London | 2020 |
| 21 GP Limited | London | 2023 |
| 21 Intelligence Limited | Banbury | 2020 |
| 21 Media Limited | London | 2020 |
| 21 Northbrook Road Freehold Limited | | 2005 |
| 21 Project Ltd | Warrington | 2026 |
| 21 Romilly Road Management Ltd | Barry | 2017 |
| 21 Services Limited | London | 2021 |
| 21 Seven Clean Ltd | Chichester | 2019 |
| 21 ST Georges Terrace Limited | Brighton | 2026 |
| 21 Tudor Street Premises Limited | | 1999 |
| 21 Vision Limited | London | 2008 |
| 21 WTR Freehold Ltd | London | 2007 |
| 2106 Ltd | Rochdale | 2010 |
| 211 Productions Ltd | Gloucester | 2026 |
| 211 Stanstead Road Management Company Limited | London | 2004 |
| 2110 Consult Trustees Limited | Harpenden | 2025 |
| 2112 Studios Ltd | York | 2019 |
| 212 Collection Ltd | London | 2026 |
| 212 Construction Ltd | Bicester | 2017 |
| 212 Productions Ltd | Bristol | 2016 |
| 212 Recruitment Consultants Ltd | Willenhall | 2017 |
| 2125 TM Ltd | Congleton | 2025 |
| 214 Hammersmith Grove Freehold Limited | Romsey | 2012 |
| 215 Lordship Lane RTM Company Limited | London | 2009 |
| 2150 UK Limited | Brighton | 2020 |
| 218 Strand Limited | London | 2009 |
| 21C Scotland Limited | Dalkeith | 2005 |
| 21C Staffing Solutions Ltd | Luton | 2026 |
| 21CC Hire Limited | Bathgate | 2022 |
| 21HSC Limited | Glasgow | 2022 |
| 21JAERODESIGN Limited | Bedford | 2015 |
| 21SM Ltd | Isleworth | 2024 |
| 21ST C Limited | Newport | 2014 |
| 21ST Century (Funfairs) Limited | Birmingham | 1994 |
| 21ST Century AV Ltd | Reading | 1999 |
| 21ST Century Groundworks Ltd | Aldershot | 2016 |
| 21ST Century Icon Awards Limited | London | 2023 |
| 21ST Century Jewels Limited | London | 2003 |
| 21ST Century Leadership Limited | Bury St Edmunds | 2016 |
| 21ST Century Property Service Limited | Gravesend | 2023 |
| 21ST Century Recruit Limited | London | 1999 |
| 21ST Century Security Services Limited | Accrington | 2016 |
| 21ST Century Services Lancashire Limited | Accrington | 2016 |
| 21ST Club Limited | London | 2020 |
| 21STTECH Limited | Wolverhampton | 2023 |
| 21T Limited | London | 2017 |
| 22 Bickersteth Road Limited | London | 2019 |
| 22 Bishopsgate by Rhubarb Limited | London | 2016 |
| 22 Bolingbroke Road Ltd | London | 2016 |
| 22 Buckingham Gate Management Company Limited | London | 2017 |
| 22 Century Ltd | Woodford Green | 2019 |
| 22 Cleaning Limited | Oxford | 2024 |
| 22 Consultants Limited | London | 2019 |
| 22 Creative Properties Ltd | Manchester | 2017 |
| 22 Denmark Road Management Company Limited | Kingston Upon Thames | 2012 |
| 22 Glovers Limited | Newport Pagnell | 2021 |
| 22 Impact Ltd | Cardiff | 2020 |
| 22 John Street Ltd | London | 2026 |
| 22 New Church Road (Hove) Limited | Eastbourne | 2006 |
| 22 Offord Road Limited | London | 2009 |
| 22 Paget Street Limited | London | 2009 |
| 22 Point 6 Ltd | Hereford | 2012 |
| 22 Proactive Limited | Wrexham | 2022 |
| 22 Recruitment & Consultancy Ltd | Norwich | 2021 |
| 22 Routes Ltd | London | 2017 |