| 2 Priory Avenue Freehold Limited | Real estate | 2024 |
| 2 Saxon Street Limited | Real estate | 2021 |
| 2 Scoop Designs Limited | Professional & scientific | 2014 |
| 2 Sedgewell Road Management Company Limited | Households | 1998 |
| 2 Send Road Management Company Limited | Households | 2025 |
| 20 Earlsfield Road Residents Limited | Real estate | 2008 |
| 2020 Design and Digital Ltd | Information & communication | 2019 |
| 2020 Financial Ltd | Administrative & support | 2007 |
| 2020 Holdings Limited | Financial services | 2019 |
| 206 Global Limited | Wholesale & retail | 2014 |
| 21 Dukes Road Residents Association Limited | Households | 2005 |
| 21 Prince of Wales Avenue (Reading) Management Company Limited | Households | 1999 |
| 21 ST James Road Limited | Real estate | 2003 |
| 210 Broadcasting CIC | Information & communication | 2025 |
| 216 Bunyan Court Limited | Real estate | 2012 |
| 21LG Management Limited | Households | 2024 |
| 21ST Century AV Ltd | Administrative & support | 1999 |
| 21ST Solutions Limited | Arts & recreation | 2010 |
| 22 Augusta Way West Ltd | Real estate | 2019 |
| 22 Coaching Ltd | Professional & scientific | 2023 |
| 22-23 Tilney Way Freehold Limited | Households | 2016 |
| 23 Partnership Ltd | Information & communication | 2010 |
| 24 Bath Road Limited | Administrative & support | 2007 |
| 24 Westcote Road (Reading) Limited | Households | 2002 |
| 24 Western Elms Avenue Management Limited | Real estate | 1982 |
| 24/7 Care 4U Ltd | Health & social care | 2015 |
| 24/7 Mobile Tyre Doctor Ltd | Wholesale & retail | 2024 |
| 24/7 Mobile Tyres Limited | Wholesale & retail | 2025 |
| 24/7 Plumbing and Heating Ltd | Construction | 2026 |
| 24/7 Restorelife Ltd | Extraterritorial | 2014 |
| 247 Destiny Ltd | Real estate | 2023 |
| 247 Eco Leads Ltd | Administrative & support | 2022 |
| 247 Truck Tyres Ltd | Wholesale & retail | 2026 |
| 24HOURBREAKDOWNRECOVERY Ltd | Other services | 2024 |
| 25 Kings Road Reading (Management) Company Limited | Households | 2014 |
| 25 to 30 Melling Close Residents Limited | Extraterritorial | 2004 |
| 253 Oxford Road Freehold Limited | Real estate | 2018 |
| 2588819 Limited | Transport & logistics | 1991 |
| 26 Brunswick Hill Ltd | Households | 2019 |
| 27 Birnam Road Management Ltd | Real estate | 2024 |
| 27 Little Marlow Road Limited | Real estate | 2003 |
| 272BIO Limited | Professional & scientific | 2019 |
| 28 Russell Street Limited | Households | 1992 |
| 2911 Limited | Other services | 2018 |
| 297 Westbourne (Residents) Limited | Households | 1993 |
| 29STARS Limited | Hospitality | 2020 |
| 2A Export Limited | Wholesale & retail | 2014 |
| 2B Developments Limited | Construction | 2016 |
| 2BODY Ltd | Information & communication | 2023 |
| 2BUDDY Limited | Hospitality | 2021 |
| 2CELL Limited | Wholesale & retail | 2018 |
| 2CS Limited | Transport & logistics | 2009 |
| 2D Promotions Limited | Professional & scientific | 2016 |
| 2DG Ltd | Professional & scientific | 2010 |
| 2ND Image Limited | Wholesale & retail | 2014 |
| 2PM Properties Ltd | Real estate | 2022 |
| 2SCARS Ltd | Transport & logistics | 2024 |
| 2TWENTYONE Production Ltd | Other services | 2013 |
| 2V Property Limited | Administrative & support | 2018 |
| 3 2 Custom Limited | Other services | 2019 |
| 3 Chillies Limited | Information & communication | 1999 |
| 3 J'S Telecomms Limited | Professional & scientific | 2013 |
| 3 Mads UK Limited | Professional & scientific | 2025 |
| 3 Way Healthcare Limited | Health & social care | 2013 |
| 30/32 Dunbar Drive Freehold Limited | Other services | 2011 |
| 300 Limited | Information & communication | 2007 |
| 313 Basingstoke Road Ltd | Real estate | 2019 |
| 32 Russell Street Management Limited | Households | 2017 |
| 32 Saville Limited | Households | 2013 |
| 322 Lavender Garden Limited | Wholesale & retail | 2020 |
| 33 Norcot Road Limited | Real estate | 1985 |
| 3318 Ltd | Information & communication | 2024 |
| 333 Latimer Road Limited | Real estate | 2006 |
| 35 Alpine Street (Reading) Limited | Households | 2018 |
| 360 Builders Limited | Construction | 2018 |
| 360 Commercial Environments Limited | Construction | 2010 |
| 360 Geomatics Ltd | Professional & scientific | 2013 |
| 360 Letting Solutions Limited | Real estate | 2021 |
| 365 Groundwork Ltd | Construction | 2019 |
| 365 Gym Ltd | Arts & recreation | 2019 |
| 365 Print Solutions Limited | Information & communication | 2013 |
| 37 Avebury Avenue Limited | Real estate | 2021 |
| 375 Bath Road Ltd | Real estate | 2018 |
| 38 Baker Street Limited | Professional & scientific | 1979 |
| 39 Bedford Road Ltd | Real estate | 2015 |
| 39 Brunswick Hill Apartments Ltd | Households | 2024 |
| 39 Horseshoe Road Management Company Limited | Real estate | 2018 |
| 3A United Ltd | Wholesale & retail | 2024 |
| 3D Automatic Transmissions Ltd | Wholesale & retail | 2017 |
| 3D Estates Limited | Real estate | 2003 |
| 3D Mechanics Ltd | Wholesale & retail | 2023 |
| 3D Megaspot Investment Ltd | Transport & logistics | 2024 |
| 3D Rapid Print Limited | Manufacturing | 2017 |
| 3D Services Limited | Construction | 2015 |
| 3D-LG Academy Ltd | Information & communication | 2024 |
| 3D-LG Ltd | Information & communication | 2007 |
| 3E Music Ltd | Information & communication | 2017 |
| 3G Capital Limited | Professional & scientific | 2015 |
| 3I Strategies Ltd | Administrative & support | 2025 |
| 3JEH Ltd | Transport & logistics | 2017 |