| 1ST Choice Accountancy Ltd | Extraterritorial | 2011 |
| 1ST Choice Accounting Services Limited | Administrative & support | 2017 |
| 1ST Choice Aerials Limited | Manufacturing | 2003 |
| 1ST Choice Building and Maintenance Ltd | Other services | 2013 |
| 1ST Choice Day Nursery C.I.C. | Education | 2015 |
| 1ST Choice Engines Ltd | Wholesale & retail | 2013 |
| 1ST Choice Estates Ltd | Real estate | 2004 |
| 1ST Choice Food Services Ltd | Hospitality | 2024 |
| 1ST Choice Lighting and Electrical Limited | Professional & scientific | 2009 |
| 1ST Choice MW Electrical Limited | Construction | 2020 |
| 1ST Choice Plant and Tool Hire Ltd | Administrative & support | 2021 |
| 1ST Choice Property Management Ltd | Real estate | 2020 |
| 1ST Choice Protekta Limited | Administrative & support | 2023 |
| 1ST Choice Renovations Limited | Construction | 2012 |
| 1ST Choice Security Ltd | Financial services | 2024 |
| 1ST Choice Security Training Ltd | Education | 2023 |
| 1ST Choice Services & Trading Ltd | Wholesale & retail | 2016 |
| 1ST Choice Services Limited | Other services | 2019 |
| 1ST City Corp Limited | Other services | 2024 |
| 1ST City Estates Limited | Other services | 2015 |
| 1ST City Fleet Limited | Administrative & support | 2001 |
| 1ST City Fleet Sales Limited | Wholesale & retail | 2021 |
| 1ST City Ltd | Professional & scientific | 2010 |
| 1ST City Partnership Limited | Other services | 2011 |
| 1ST City Self Drive Ltd | Administrative & support | 2023 |
| 1ST City Services Limited | Other services | 2024 |
| 1ST City Solutions Limited | Other services | 2024 |
| 1ST City Studio Limited | Other services | 2024 |
| 1ST City Systems Limited | Other services | 2024 |
| 1ST City Traders Limited | Other services | 2024 |
| 1ST City Trading Limited | Other services | 2024 |
| 1ST City Van Hire Limited | Administrative & support | 2010 |
| 1ST Class BET Ltd | Arts & recreation | 2025 |
| 1ST Class Build Limited | Construction | 2008 |
| 1ST Class Cars (NE) Ltd | Transport & logistics | 2021 |
| 1ST Class Cleaning Services Ltd | Administrative & support | 2025 |
| 1ST Class Detailing Ltd | Administrative & support | 2022 |
| 1ST Class Electrical Services Ltd | Construction | 2014 |
| 1ST Class First AID Ltd | Health & social care | 2015 |
| 1ST Class Heating and Air Conditioning Limited | Construction | 2024 |
| 1ST Class International Limited | Other services | 2025 |
| 1ST Class Nails and Pedicure Ltd | Other services | 2020 |
| 1ST Class Physical Restraint Training Ltd | Education | 2025 |
| 1ST Class Printing Ltd | Manufacturing | 2026 |
| 1ST Class Protection Limited | Other services | 2004 |
| 1ST Class Recovery Limited | Wholesale & retail | 2014 |
| 1ST Class Services (London) Limited | Other services | 2004 |
| 1ST Class Services Limited | Other services | 2021 |
| 1ST Class Sparks Services Ltd | Administrative & support | 2021 |
| 1ST Class Systems Limited | Construction | 2023 |
| 1ST Class Testing Ltd | Health & social care | 2021 |
| 1ST Class Trade Limited | Wholesale & retail | 2021 |
| 1ST Class Trading Limited | Other services | 2025 |
| 1ST Class UK Solutions Ltd | Transport & logistics | 2016 |
| 1ST Cleaners Limited | Other services | 2026 |
| 1ST Code Ltd | Information & communication | 2021 |
| 1ST Company Formations Limited | Extraterritorial | 2024 |
| 1ST Companyuk Limited | Administrative & support | 2020 |
| 1ST Construction (NW) Ltd | Construction | 2024 |
| 1ST Content Global Ltd | Information & communication | 2025 |
| 1ST Continent Hospitality Limited | Hospitality | 2014 |
| 1ST Continent Hotels Limited | Hospitality | 2014 |
| 1ST Corp Limited | Other services | 2021 |
| 1ST Corporation Ltd | Professional & scientific | 2003 |
| 1ST Dawn Limited | Administrative & support | 2020 |
| 1ST Deal Limited | Other services | 2024 |
| 1ST Defence Ltd | Administrative & support | 2021 |
| 1ST Defence Security Service Ltd | Administrative & support | 2023 |
| 1ST Defence Services & Training Ltd | Education | 2023 |
| 1ST Developments Chelsea Limited | Construction | 2017 |
| 1ST Developments London Limited | Real estate | 2019 |
| 1ST Diamond Properties Limited | Other services | 2021 |
| 1ST Diamond Services Ltd | Wholesale & retail | 2025 |
| 1ST Digital Ltd | Information & communication | 2025 |
| 1ST Doctor Limited | Health & social care | 2014 |
| 1ST Dream Home Ltd | Construction | 2017 |
| 1ST Ecommerce Network Ltd | Wholesale & retail | 2022 |
| 1ST Edition Tech Ltd | Wholesale & retail | 2023 |
| 1ST Eleven Limited | Information & communication | 2017 |
| 1ST Encounter Ltd | Administrative & support | 2024 |
| 1ST Enterprise Ltd | Wholesale & retail | 2023 |
| 1ST Estate Biomethane Limited | Other services | 2023 |
| 1ST Ethics Limited | Other services | 2024 |
| 1ST Euro Services Limited | Construction | 2022 |
| 1ST Europa Limited | Other services | 2026 |
| 1ST Europe Associates Limited | Other services | 2025 |
| 1ST Europe Consultants Limited | Other services | 2026 |
| 1ST Europe Corp Limited | Other services | 2025 |
| 1ST Europe Corporation Limited | Other services | 2025 |
| 1ST Europe International Limited | Other services | 2026 |
| 1ST Europe Limited | Other services | 2026 |
| 1ST Europe Services Limited | Other services | 2022 |
| 1ST Europe Solutions Limited | Other services | 2025 |
| 1ST Europe Systems Limited | Other services | 2025 |
| 1ST Europe Traders Limited | Other services | 2025 |
| 1ST Europe Worldwide Limited | Other services | 2026 |
| 1ST European International Limited | Other services | 2026 |
| 1ST European Services Limited | Other services | 2023 |
| 1ST Express International Limited | Wholesale & retail | 2023 |
| 1ST Fancy Art Limited | Manufacturing | 2022 |