| 2 Circles Communications Limited | Information & communication | 2022 |
| A LOT Less Ordinary Ltd | Hospitality | 2017 |
| Aestheticfranchise Ltd | Health & social care | 2020 |
| Alliance Communications Holdings Limited | Financial services | 2021 |
| Alliance Communications Ltd | Information & communication | 2005 |
| Alliance Communications Solutions Limited | Information & communication | 1998 |
| Ascent Global Services Limited | Information & communication | 2009 |
| Atech Network Services Limited | Information & communication | 2008 |
| Bang Systems Limited | Information & communication | 2011 |
| Basingstoke Golf Club 1907 Ltd | Arts & recreation | 2023 |
| Bmore Group Ltd | Professional & scientific | 2018 |
| Bsas (Telecoms) Limited | Information & communication | 2000 |
| Chalvington Communications Limited | Information & communication | 2000 |
| Chalvington Holdings Limited | Financial services | 2011 |
| Class Affinity Projects Limited | Information & communication | 2000 |
| Class Telecommunications Limited | Information & communication | 2001 |
| Convergence Communications Limited | Information & communication | 2004 |
| Dataphone Communications Limited | Information & communication | 1989 |
| Dataphone Services Limited | Information & communication | 1997 |
| Efar Ltd. | Information & communication | 2000 |
| EHB Telecommunications Limited | Information & communication | 2020 |
| ET AL Innovations Limited | Information & communication | 1999 |
| Eurolink Connect Limited | Information & communication | 2024 |
| Flip Connect Limited | Information & communication | 2024 |
| Flip Solutions Limited | Information & communication | 2002 |
| G H M Communications Limited | Information & communication | 2005 |
| GHM Care Limited | Information & communication | 2017 |
| Glemnet Limited | Information & communication | 2001 |
| Glemstone Telecommunications Limited | Information & communication | 2005 |
| Hanley Health Limited | Professional & scientific | 2009 |
| Hello Telecom (UK) Limited | Information & communication | 2002 |
| Hello Telecom Limited | Information & communication | 2016 |
| Horizon Telecom Ltd | Information & communication | 1998 |
| Hullabaloo Communications Limited | Information & communication | 2006 |
| Integrated Business Systems Limited | Information & communication | 2000 |
| Jmcp Holdings Limited | Information & communication | 2018 |
| MPS Networks Limited | Information & communication | 2025 |
| N.T. Leasing Limited | Financial services | 1999 |
| Nexus Care Limited | Information & communication | 2017 |
| NT Independent Networks Limited | Extraterritorial | 1998 |
| NT Voice & Data Group Limited | Information & communication | 2024 |
| NT Voice and Data Solutions Limited | Information & communication | 1996 |
| Pink Connect Ltd | Information & communication | 2002 |
| Redline Tele.Com Limited | Information & communication | 2003 |
| SCG Channel Limited | Information & communication | 2022 |
| SCG Connected Limited | Information & communication | 2025 |
| SCG Direct Limited | Information & communication | 2022 |
| SCG East Anglia Limited | Information & communication | 2024 |
| SCG Hosted Limited | Information & communication | 2022 |
| SCG Living Limited | Information & communication | 2025 |
| SCG Midlands Group Limited | Information & communication | 2024 |
| SCG North-East Limited | Information & communication | 2024 |
| SCG North-West Limited | Information & communication | 2024 |
| SCG Together Limited | Information & communication | 2022 |
| SCG Wholesale Limited | Information & communication | 2022 |
| Southern Business Technologies Limited | Information & communication | 2001 |
| Southern Communications Corporate Solutions Limited | Information & communication | 2025 |
| Southern Communications Data Services Limited | Information & communication | 1996 |
| Southern Communications Group Limited | Information & communication | 2016 |
| Southern Communications Holdings Limited | Information & communication | 2013 |
| Southern Communications Investments Limited | Information & communication | 2016 |
| Southern Communications Limited | Information & communication | 1977 |
| Southern Data Limited | Information & communication | 2000 |
| Storacall Technology Ltd | Information & communication | 2025 |
| Structured Communications Limited | Information & communication | 2011 |
| Tariff Watch Limited | Information & communication | 1997 |
| THE IT Cloud (London) Ltd | Information & communication | 2002 |
| TIC (the Independent Choice) Limited | Information & communication | 2002 |
| Verranti Limited | Information & communication | 2010 |