| 20 Brick Ltd | Manningtree | 2020 |
| 20 Doro Ltd | London | 2022 |
| 20 Fall Ltd | Liverpool | 2019 |
| 20 Four Ltd | Rugby | 2020 |
| 20 Four Seven Fashion Limited | Manchester | 2024 |
| 20 Four Seven Trading Limited | Manchester | 2024 |
| 20 Lifestyle Ltd | Manchester | 2025 |
| 20 London Project Consultancy Ltd | London | 2021 |
| 20 Moss Street Limited | Glasgow | 2019 |
| 20 Sharp MEN Ltd | Bury St. Edmunds | 2025 |
| 20 Sharp Minds Ltd | London | 2026 |
| 20-20 Foods Ltd | London | 2018 |
| 20-SIX Limited | Nottingham | 2016 |
| 20/20 Direct Ltd | Newcastle Upon Tyne | 2025 |
| 20/20 Equine Ltd | Eye | 2020 |
| 20/20 Icare Ltd | Leicestershire | 2020 |
| 20/20 Print & Copier Solutions Ltd | Cardiff | 2013 |
| 20/20 Vision & Eyewear Ltd | Leighton Buzzard | 2018 |
| 20/21 Fine Art Limited | London | 1989 |
| 200 Media Limited | London | 2022 |
| 200 Strong Limited | Leicester | 2024 |
| 2000 Test Equipment Limited | London | 2011 |
| 2000CREWS Limited | Romford | 2026 |
| 2001 Products Ltd | Chipping Norton | 2022 |
| 2002 Warehouse Financial Services Limited | Middlewich | 2002 |
| 2008 Stock Sale Ltd | Birmingham | 2013 |
| 2010 Ltd | Stockton On Tees | 2018 |
| 2012 Ltd | Manchester | 2004 |
| 2019 Notts Ltd | Abingdon | 2019 |
| 202 Design Limited | London | 2001 |
| 202 Interiors Commercial Agency Ltd | Hove | 2024 |
| 202 Surrey Limited | London | 2025 |
| 2020 & Beyond Ltd | Caterham | 2019 |
| 2020 Ceramics Ltd | Biggin Hill | 2020 |
| 2020 Creations Limited | Edenbridge | 2020 |
| 2020 Drinks Ltd | Salisbury | 2020 |
| 2020 Furniture Design Ltd | St Neots | 2011 |
| 2020 Gifted Ltd | Carrickfergus | 2021 |
| 2020 Group Services Ltd | London | 2018 |
| 2020 Hearing Ltd | Leeds | 2014 |
| 2020 Interiors Ltd | High Wycombe | 2022 |
| 2020 Mobility Limited | Crieff | 2017 |
| 2020 Phones Ltd | Birmingham | 2019 |
| 2020 Supplies Ltd | Swansea | 2020 |
| 2020 Trade Group Limited | Accrington | 2020 |
| 2020 Vision Opticians Ltd | Birmingham | 2010 |
| 2020 Whiskey & Wine Ltd | Sheffield | 2019 |
| 2020BLACK Ltd | Kilmarnock | 2023 |
| 2020MOTORS Ltd | Oldham | 2019 |
| 2020TRADES Ltd | Chorley | 2018 |
| 2020TRIATHLON Limited | Bexhill-On-Sea | 2016 |
| 2020VISIONUK Ltd | Bolton | 2020 |
| 2021 Wholesale Ltd | Arnold | 2021 |
| 2023 Cool Foods Ltd | London | 2023 |
| 2028 Ltd | London | 2025 |
| 2030 AI Global Solutions Limited | London | 2026 |
| 2030 Auto Care Limited | Bolton | 2017 |
| 2036 RKRF3 Ltd | Sleaford | 2023 |
| 206 Global Limited | Reading | 2014 |
| 206 LAB Ltd | Newcastle Upon Tyne | 2025 |
| 208MR. Blue Ltd | Edinburgh | 2025 |
| 20:20 Iconic Art Vision Ltd. | Cardiff | 2017 |
| 20:20 Logistics Ltd | London | 2019 |
| 20:20 Opticians Limited | Aberdeen | 1997 |
| 20BY10 Limited | Leeds | 2024 |
| 20FIT UK Ltd. | London | 2016 |
| 20FYPM Limited | Nottingham | 2021 |
| 20IM Limited | London | 2021 |
| 20IM Soho Limited | London | 2024 |
| 20K and a Dead Sheep Ltd | Manchester | 2021 |
| 20SEVEN Limited | Carlisle | 2014 |
| 20TEN Racing Limited | Newark | 2008 |
| 20TH Century Clothiers Limited | Elland | 2009 |
| 20TH Century Design Ltd | Sherborne | 2019 |
| 20TH Century Flicks Limited | Bristol | 2009 |
| 20TH Century Gallery Limited | London | 1982 |
| 20TH Century Lots Limited | London | 2016 |
| 20TH Century Militaria Ltd | Bournemouth | 2018 |
| 20TH Century Motor Cars Limited | Chichester | 2019 |
| 20TH Century Specs Ltd | London | 2023 |
| 20TH Century Store Limited | Macclesfield | 2024 |
| 20TH Century Toys Ltd | High Wycombe | 2020 |
| 20TH Hole Ltd | Stonehaven | 2026 |
| 20THCQUARTERS Ltd | London | 2013 |
| 20YEARS Ltd | Gravesend | 2024 |
| 21 Apollo Ltd | Barking | 2022 |
| 21 Century Columbus Int'L Trading Limited | Beckenham | 2024 |
| 21 Clinic Equipment and Training Limited | Banbury | 2023 |
| 21 Clinic Limited | Banbury | 2017 |
| 21 Dresses Limited | Brackley | 2013 |
| 21 Empire Group Limited | London | 2023 |
| 21 Global Enterprise Limited | London | 2024 |
| 21 Global Limited | Slough | 2024 |
| 21 Kitchen Design Ltd | Kilmarnock | 2020 |
| 21 LUX Motorsport Ltd | Stirling | 2024 |
| 21 Omnicare Ltd | Strabane | 2021 |
| 21 Online Ltd | London | 2022 |
| 21 Twenty Ltd | Bedworth | 2019 |
| 21 Water Street Car Sales Limited | Wallasey | 2024 |
| 21 Water Street Cat Sales Limited | London | 2025 |