| 4S Estates Ltd | Administrative & support | 2024 |
| 4S Gbpm Ltd | Construction | 2024 |
| 4S Invest Limited | Real estate | 2024 |
| 4S Management Limited | Real estate | 2019 |
| 4S Property Investments Ltd | Real estate | 2014 |
| 4S Prosperity Partnership Ltd | Hospitality | 2025 |
| 4S Solutions Limited | Wholesale & retail | 2025 |
| 4S Wholesale Ltd | Wholesale & retail | 2019 |
| 4S World Ltd | Professional & scientific | 2020 |
| 4S-EVENTS Ltd | Information & communication | 2015 |
| 4SA Ltd | Professional & scientific | 2026 |
| 4SAKE Limited | Arts & recreation | 2021 |
| 4SCALE Agency LLP | | 2024 |
| 4SCENIC LLP | | 2018 |
| 4SEASON Fashion Ltd | Wholesale & retail | 2025 |
| 4SEASONS Joinery Limited | Manufacturing | 2025 |
| 4SEASONS Removals Ltd | Transport & logistics | 2026 |
| 4SEASONSCLEAN Ltd | Administrative & support | 2021 |
| 4SEASONSGRIND Ltd | Manufacturing | 2023 |
| 4SECURITY Ltd | Construction | 2025 |
| 4SENSUS Ltd | Other services | 2024 |
| 4SERV Ltd | Information & communication | 2023 |
| 4SF Ltd | Households | 1994 |
| 4SFERA Ltd | Information & communication | 2020 |
| 4SGB Ltd | Professional & scientific | 2021 |
| 4SH Limited | Real estate | 2017 |
| 4SIGHT AI Ltd | Professional & scientific | 2026 |
| 4SIGHT Consulting Ltd | Professional & scientific | 2024 |
| 4SITE Management Services Limited | Professional & scientific | 2015 |
| 4SJV RTM Company Limited | Households | 2012 |
| 4SL Consulting Limited | Information & communication | 2007 |
| 4SMG Limited | Real estate | 2024 |
| 4SMILES Ltd | Health & social care | 2023 |
| 4SOLD Ltd | Wholesale & retail | 2013 |
| 4SP Solutions Ltd | Administrative & support | 2022 |
| 4SPROJECTS CIC | Information & communication | 2025 |
| 4SQUARE Wholesale Ltd | Wholesale & retail | 2024 |
| 4SQUAREIT Limited | Information & communication | 2013 |
| 4STAR Properties Ltd | Real estate | 2024 |
| 4STONE Investments Ltd | Real estate | 2026 |
| 4STRATEGIC Ltd | Professional & scientific | 2019 |
| 4SURE Home Solutions Ltd | Construction | 2026 |
| 4T Developments LLP | | 2025 |
| 4T Holdings Limited | Real estate | 2020 |
| 4T Markets Limited | Financial services | 2014 |
| 4T Time Ltd | Information & communication | 2021 |
| 4T&I Limited | Financial services | 2017 |
| 4T3 Ltd | Information & communication | 2026 |
| 4TALL Trees Limited | Financial services | 2022 |
| 4TC Services Limited | Information & communication | 2009 |
| 4TDONLINE Ltd | Wholesale & retail | 2025 |
| 4TEAM Corporation Ltd | Information & communication | 2014 |
| 4TECH Services Ltd | Administrative & support | 2024 |
| 4TEL Ltd | Information & communication | 2023 |
| 4TEQ Ltd | Information & communication | 2024 |
| 4TH and Bainbridge Limited | Financial services | 2017 |
| 4TH Born Ltd | Real estate | 2024 |
| 4TH Care Ltd | Health & social care | 2023 |
| 4TH Day Events Ltd | Administrative & support | 2023 |
| 4TH Dimension Inc Ltd | Professional & scientific | 2021 |
| 4TH Dwarf Ltd | Information & communication | 2021 |
| 4TH Earth Limited | Information & communication | 2008 |
| 4TH Estate Consults Limited | Professional & scientific | 2008 |
| 4TH Generation - Flat Roofing Services Ltd | Construction | 2019 |
| 4TH Industrial (UK) 2 Limited Partnership | | 2022 |
| 4TH Industrial (UK) Limited Partnership | | 2021 |
| 4TH Industrial Ammolite Limited Partnership | | 2025 |
| 4TH Industrial GP (UK) 2 Limited | Real estate | 2022 |
| 4TH Industrial GP (UK) Ltd | Real estate | 2020 |
| 4TH Industrial Management Ltd | Real estate | 2020 |
| 4TH Industrial Nominee 2 Limited | Real estate | 2022 |
| 4TH Industrial Nominee Ltd | Real estate | 2020 |
| 4TH March Metals Ltd | Mining & quarrying | 2025 |
| 4TH Revolution Analytics Limited | Information & communication | 2022 |
| 4TH Utility Holdings Limited | Information & communication | 2017 |
| 4TH Utility Holdings Topco Limited | Information & communication | 2023 |
| 4TH Utility ISP Limited | Information & communication | 2024 |
| 4TH Utility ISP2 Limited | Information & communication | 2024 |
| 4THELOVE4THEMONEY Limited | Information & communication | 2025 |
| 4THEPLOT Ltd | Administrative & support | 2025 |
| 4THEREALPROPERTY Ltd | Households | 2024 |
| 4THETRADE Ltd | Financial services | 2025 |
| 4THGEN Decorating Limited | Construction | 2024 |
| 4THQUARTERSTUDIOS Ltd | Wholesale & retail | 2022 |
| 4TLOG Creative Craft Community Group Limited | Education | 2026 |
| 4TRES Solutions Ltd | Wholesale & retail | 2019 |
| 4TRONIC Ltd. | Construction | 2014 |
| 4TUNE Properties Limited | Households | 2024 |
| 4TUNGATES Ltd | Extraterritorial | 2024 |
| 4TWICE Trades Limited | Wholesale & retail | 2024 |
| 4TX Ltd | Information & communication | 2016 |
| 4U Care Ltd | Administrative & support | 2026 |
| 4U Cleaning Specialists Limited | Households | 2019 |
| 4U Construction Group Ltd | Construction | 2025 |
| 4U Fashions Limited | Wholesale & retail | 2011 |
| 4U Franchise Ltd | Wholesale & retail | 2014 |
| 4U Fresh Produce Ltd | Manufacturing | 2017 |
| 4U Goodies Limited | Wholesale & retail | 2016 |
| 4U Housekeeping Limited | Administrative & support | 2019 |
| 4U Industry Co., Limited | Manufacturing | 2011 |