| 23 Ears Limited | Pewsey | 2006 |
| 23 Edge Limited | London | 2026 |
| 23 Studios MCR Ltd | Manchester | 2023 |
| 23 Training Club Limited | Wallasey Wirral | 2022 |
| 23/7 Global Limited | London | 2015 |
| 230 Intensives Ltd | Wolverhampton | 2021 |
| 2300 Club Limited | Lancashire | 1994 |
| 231 Ltd | Dundee | 2020 |
| 233 Ltd | London | 2025 |
| 236 Music Ltd | London | 2022 |
| 23:13 Management Ltd | Manchester | 2026 |
| 23AE Ltd | Stockport | 2024 |
| 23RD Century Ltd | Hailsham | 2022 |
| 23RD MAN Ltd | Worthing | 2003 |
| 23RD Precinct Artist Management Limited | Glasgow | 2010 |
| 23XSSC Ltd | Dagenham | 2025 |
| 24 BIT Audio Ltd | Borehamwood | 2019 |
| 24 Fitness & Strength Gosport Limited | Gosport | 2025 |
| 24 Hope Street Ltd | Liverpool | 2023 |
| 24 Hour Active Limited | Princes Risborough | 2012 |
| 24 Hour Entertainment Limited | London | 2022 |
| 24 Hour Fitness Limited | Burton-On-Trent | 2012 |
| 24 HR Gym Limited | Swindon | 2013 |
| 24 KS Touring Limited | Liverpool | 2020 |
| 24 Lifestyle and Performance Limited | Belvedere | 2023 |
| 24 Live Yorkshire Limited | York | 2015 |
| 24 Play Chester Ltd | Sutton | 2019 |
| 24 Play Kirkby Ltd | Sutton | 2025 |
| 24 Play Preston Ltd | Sutton | 2007 |
| 24 Play Romford Ltd | Sutton | 2026 |
| 24 Play Upminster Ltd | Sutton | 2026 |
| 24 Play Wembley Ltd | Sutton | 2025 |
| 24 Yards Ltd | Northampton | 2016 |
| 24-7 Competitions Ltd | Cardiff | 2026 |
| 24-7 Motorsport Limited | Norwich | 2018 |
| 24/7 Fitness (UK) Ltd | Norwich | 2013 |
| 24/7 Fitness Birmingham Limited | Norwich | 2012 |
| 24/7 Fitness Bromborough Limited | Kidderminster | 2015 |
| 24/7 Fitness Group Ltd | Norwich | 2015 |
| 24/7 Fitness Gyms Ltd | Norwich | 2017 |
| 24/7 Fitness Kidderminster Ltd | Norwich | 2012 |
| 24/7 Fitness Ltd | Fareham | 2011 |
| 24/7 Gym Limited | Chatham | 2010 |
| 2401 Visuals Ltd | Gloucester | 2023 |
| 2407 Ltd | London | 2024 |
| 243 Road Racing Association | Scarborough | 2023 |
| 247 Centre Limited | London | 2023 |
| 247 Media Group Limited | Ilkley | 2006 |
| 247 Studios Limited | Leicester | 2017 |
| 2471 Consultancy Limited | Barnet | 2012 |
| 247GAMBLING.CO.UK Ltd. | Somerset | 2011 |
| 249 Fitness Ltd | Sittingbourne | 2021 |
| 24C Ltd | Henley In Arden | 2011 |
| 24FILMS Ltd | Biggleswade | 2024 |
| 24FIT Concept Limited | London | 2019 |
| 24FITNESS Ltd | Leicester | 2017 |
| 24GYMSPACE Ltd | Brighton | 2023 |
| 24K Events Ltd | Swindon | 2022 |
| 24K Fitness Ltd | Weston-Super-Mare | 2026 |
| 24KG Productions UK Limited | High Wycombe | 2026 |
| 24KS Productions Limited | Liverpool | 2018 |
| 24N Fitness Ltd | Manchester | 2022 |
| 24SPORTS Ltd | London | 2026 |
| 24TRAINKENT Ltd | Bexley | 2026 |
| 25 Fitness Ltd | Nottingham | 2026 |
| 25 Poets Road Limited | London | 2019 |
| 25 RAD Fitness Ltd | Chesterfield | 2022 |
| 25 Sport Ltd | Llanelli | 2025 |
| 252 Training Ltd | Chesterfield | 2025 |
| 258 Management Limited | London | 2017 |
| 258SPORTS Ltd | Croydon | 2019 |
| 25EIGHT Ltd | Sheffield | 2013 |
| 25TH Hour Ltd | Belfast | 2025 |
| 25TH Image Limited | Sudbury | 2022 |
| 26 at 27 Limited | Cockermouth | 2001 |
| 26 Extreme Ltd | Newry | 2009 |
| 26 Highgate West Hill Limited | London | 2018 |
| 26 NEO Fitness Ltd | Chesterfield | 2023 |
| 26 Seven Media Limited | Potters Bar | 2016 |
| 26041444 | Cardiff | 2015 |
| 2643 Geldard RD Birstall Leeds (Leaseco) Limited | Shirebrook | 2020 |
| 2653 Brewary Quarter Cheltenham (Leaseco) Limited | Shirebrook | 2014 |
| 2655 Pride PK Derby (Leaseco) Limited | Shirebrook | 2014 |
| 265553 Ltd | Kingston Upon Thames | 2024 |
| 2658 Banstead RD Ewell (Leaseco) Limited | Shirebrook | 2020 |
| 2664 Pasonage RP Leigh (Leaseco) Limited | Shirebrook | 2020 |
| 2665 Tritton RD Lincoln (Leaseco) Limited | Shirebrook | 2020 |
| 2668 Cyfarthfa RP Merthyr Tydfil Limited | Shirebrook | 2020 |
| 2671 Colwich Loop Nottingham (Leaseco) Limited | Shirebrook | 2014 |
| 2677 Timber Beach Sunderland (Leaseco) Limited | Shirebrook | 2020 |
| 2682 Bloomfield SC Bangor (Leaseco) Limited | Belfast | 2020 |
| 2691 Capital SP Leckwith Cardiff Limited | Shirebrook | 2020 |
| 2695 White Lion RP Dunstable (Leaseco) Limited | Shirebrook | 2020 |
| 2697 Charlestown RD Halifax (Leaseco) Limited | Shirebrook | 2020 |
| 26WEST Sport Ltd | London | 2021 |
| 27 Hydro Fitness Ltd | Chesterfield | 2023 |
| 27 Musical London Limited | Coalville | 2016 |
| 270 Adventure Limited | Gloucester | 2016 |
| 2707 Ocean Plaza Marine Southport (Leaseco) Limited | Shirebrook | 2014 |
| 2710 Alexandra Park Scotia Tunstall (Leaseco) Limited | Shirebrook | 2020 |