| 2 Ormonde Road (Freehold) Ltd | London | 2020 |
| 2 Red Desks Limited | London | 2015 |
| 2 Ronald Hill Grove (Freehold) Limited | Leigh On Sea | 2010 |
| 2 Rude Limited | Baildon | 2022 |
| 2 Sheerwater Limited | Wembley | 2013 |
| 2 Sided Ltd | Bedford | 2012 |
| 2 Sisters 4 Kids Limited | Harrow | 2021 |
| 2 Sky Light Ltd | Luton | 2021 |
| 2 Sorella's Limited | South Yorkshire | 2007 |
| 2 ST Contact Umbrella Ltd | Ilford | 2022 |
| 2 Start Group Limited | Portsmouth | 2015 |
| 2 Start Limited | Portsmouth | 2008 |
| 2 Station Road Ltd | Houghton Le Spring | 2022 |
| 2 Steps AHEAD2 Ltd | London | 2025 |
| 2 Training Limited | Derbyshire | 2007 |
| 2 Twisted Scissors Ltd | Cradley Heath | 2020 |
| 2 U Beauty Limited | Edinburgh | 2019 |
| 2 Way Solution Limited | Enfield | 2019 |
| 2 Way Tenancy Solutions CIC | Gateshead | 2014 |
| 2 Works TM Limited | Newton-Le-Willows | 2009 |
| 2-IN-2-1 Ltd | Berkshire | 1999 |
| 2-MINDS Counselling and Neuroinclusive Support Ltd | Edinburgh | 2024 |
| 20 : 20 Clean Ltd | Amersham | 2014 |
| 20 Devonshire Place RTM Company Limited | Hastings | 2007 |
| 20 Park Avenue Limited | London | 2004 |
| 20 Winchester Street Management Limited | | 2003 |
| 20 Xclusive Track Days Ltd | Stoke-On-Trent | 2024 |
| 20-20 Events Management Limited | London | 2010 |
| 20-20 Projects Limited | London | 2005 |
| 20/02/2020 Ltd | London | 2020 |
| 20/20 - Vision Deliveries Ltd | Gloucester | 2019 |
| 20/20 Facilities Management Limited | North East Lincolnshire | 1997 |
| 201 Studio Ltd | London | 2020 |
| 2014 (South Wales) Limited | Swansea | 2018 |
| 2020 Business Networks Limited | Tilbury | 2015 |
| 2020 Highways Ltd | St. Neots | 2023 |
| 2020 Nail Limited | Kingswinford | 2020 |
| 2020 Optom Ltd | Manchester | 2019 |
| 2020 Together (WE CAN) Ltd | Perth | 2022 |
| 2020 Traffic Management Ltd | St. Neots | 2020 |
| 2021 Inc Ltd | Bury St. Edmunds | 2021 |
| 2023 Inc Limited | London | 2023 |
| 2023FOREVERHEALTH Ltd | London | 2023 |
| 209 London Limited | Fleet | 2021 |
| 20FT Box Ltd | London | 2026 |
| 20FT Storage Limited | Leicester | 2018 |
| 20SCHEMES Ltd | Edinburgh | 2023 |
| 20TWENTY Hair and Beauty Limited | Banff | 2020 |
| 21 & Westbourne Ltd | London | 2021 |
| 21 Barbers Ltd | Peterborough | 2025 |
| 21 Bowling Green Street Limited | Leicester | 1971 |
| 21 Brunswick Road Limited | London | 2001 |
| 21 Cecilia RD Management Ltd | London | 2025 |
| 21 DLG Ltd | Glasgow | 2021 |
| 21 Dream Nails Ltd | London | 2022 |
| 21 East Bank RTM Company Limited | London | 2009 |
| 21 Eaton Rise (Management) Ltd. | London | 1993 |
| 21 Hornchurch Ltd | Ongar | 2024 |
| 21 Lansdown Place Management Company Limited | Gloucestershire | 1990 |
| 21 North Limited | London | 2019 |
| 21 Sidney Godley Ltd | Loughton | 2014 |
| 21 SIX TPC Limited | Southampton | 2026 |
| 21 Vera Road Management Company Limited | Bristol | 2011 |
| 21-22A Chester Street Management Company Limited | Shrewsbury | 2006 |
| 21/38 West Kensington Mansions Residents Association Ltd | Steyning | 2003 |
| 210922 Limited | Bacup | 2014 |
| 2112 Barbers Ltd | Newbury | 2018 |
| 212 Electrical Limited | Northampton | 2016 |
| 212 Pilates Edit Ltd | Birmingham | 2025 |
| 2127 Ltd | Waltham Abbey | 2025 |
| 213 Kingston Road Limited | Wimbledon | 2008 |
| 213TANNING Ltd | Blackpool | 2025 |
| 214 Croydon Road Residents Management Company Limited | Beckenham | 1996 |
| 215 Upper Halliford Road Management Company Limited | Shepperton | 2013 |
| 2159 Investment Company Limited | Edinburgh | 2020 |
| 219 CRM Limited | Oxted | 2020 |
| 219 High Street Limited | Glasgow | 2023 |
| 219GROUP Ltd | London | 2025 |
| 21:01 Aesthetic and Wellness Clinic Ltd | Stowmarket | 2024 |
| 21C Marketing Ltd | Milford Haven | 2015 |
| 21CNCSTUDIO Ltd | Bury St. Edmunds | 2022 |
| 21ST Army Group Limited | Bedford | 2019 |
| 21ST Century Actors Management Ltd | London | 1992 |
| 21ST Century Biotech Limited | London | 2021 |
| 21ST Century Build Ltd | Stockton-On-Tees | 2016 |
| 21ST Century Business Machines Limited | Westbury | 1998 |
| 21ST Century Dogs Ltd | Manchester | 2017 |
| 21ST Century Education Trust | Bedford | 2005 |
| 21ST Century Farrier Ltd | Uttoxeter | 2022 |
| 21ST Century Integrated Systems Limited | Ashby-De-La-Zouch | 1989 |
| 21ST Century Plumbing (Lincoln) Limited | Lincoln | 2005 |
| 21ST Century Security Ltd | Blackburn | 2025 |
| 21ST Century Tanning Ltd | Newcastle Upon Tyne | 2013 |
| 21ST Century Tattoo (NW) Ltd | Heywood | 2011 |
| 21ST Century Tattoo Limited | Rochdale | 2005 |
| 21ST Century Thame Limited | Thame | 2006 |
| 21ST CUT Kwexa Ltd | Oxford | 2022 |
| 21ST Healthcare Solutions Limited | Nottingham | 2014 |
| 22 Artesian Road Limited | London | 1996 |
| 22 Barbers Limited | Rochford | 2024 |