| A G Richards Ltd | Real estate | 2022 |
| A G Sadowski Underwriting Limited | Financial services | 1999 |
| A G Sayers Limited | Financial services | 2011 |
| A G Secretarial Limited | Professional & scientific | 1991 |
| A G Services Ltd. | Construction | 2009 |
| A G Supply Solutions Ltd | Health & social care | 2019 |
| A Gahakwa Limited | Real estate | 2014 |
| A Gallery Artists Ltd | Wholesale & retail | 2023 |
| A Gard Consultancy Ltd | Professional & scientific | 2025 |
| A Geezer & a Blonde Productions London Limited | Information & communication | 2012 |
| A Genius Visuals Ltd | Information & communication | 2024 |
| A Gharial Finance Solutions Limited | Financial services | 2024 |
| A Ghide Ltd | Professional & scientific | 2020 |
| A Gibson Advisory Ltd | Professional & scientific | 2026 |
| A Girl of My Word Limited | Financial services | 2021 |
| A Global Recruitment Ltd | Administrative & support | 2025 |
| A Gois Ltd | Health & social care | 2016 |
| A Gold Star Ltd | Wholesale & retail | 2025 |
| A Goldsmith Ltd | Real estate | 2017 |
| A Good Co. Ltd | Hospitality | 2024 |
| A Good Film Limited | Information & communication | 2017 |
| A Good MAN Ltd | Professional & scientific | 2021 |
| A Good Place for BME People in Lewisham Ltd | Professional & scientific | 2025 |
| A Good Rabbit Ltd | Manufacturing | 2022 |
| A Good Recruitment Company Limited | Administrative & support | 2019 |
| A Good Start Ltd | Financial services | 2019 |
| A Good Thing CIC | Administrative & support | 2020 |
| A Good Website Ltd | Wholesale & retail | 2013 |
| A GP Helps Ltd | Health & social care | 2025 |
| A Grade Administration Limited | Administrative & support | 2024 |
| A Grade Construction Limited | Construction | 2026 |
| A Grade Media Limited | Information & communication | 2012 |
| A Graphics Ltd | Arts & recreation | 2021 |
| A Great Stay 4 U Ltd | Hospitality | 2025 |
| A Green Financial Services Ltd | Professional & scientific | 2019 |
| A Greener England Ltd | Professional & scientific | 2020 |
| A Greener Home Ltd | Wholesale & retail | 2020 |
| A Greener London Ltd | Agriculture & fishing | 2018 |
| A Greener Place Limited | Construction | 2022 |
| A Grey Area Ltd | Professional & scientific | 2014 |
| A Grocery Limited | Wholesale & retail | 2021 |
| A Group Holdings Limited | Financial services | 2018 |
| A GUN Logistics Limited | Transport & logistics | 2022 |
| A Gurbaxani Ltd | Health & social care | 2023 |
| A H & Z Associates Limited | Education | 2012 |
| A H - Biotech Limited | Professional & scientific | 2017 |
| A H a Construction Ltd | Construction | 2018 |
| A H a Group of Companies Ltd | Financial services | 2021 |
| A H and Associates Limited | Professional & scientific | 2015 |
| A H Audio Limited | Information & communication | 2013 |
| A H B Medical Limited | Health & social care | 2007 |
| A H Building Constructions and Supply Limited | Construction | 2023 |
| A H Capital Properties Ltd | Households | 2025 |
| A H Dore Limited | Professional & scientific | 2023 |
| A H Fire Preventions Limited | Administrative & support | 2006 |
| A H Furnishers Ltd | Wholesale & retail | 2019 |
| A H Investments London Limited | Real estate | 2011 |
| A H J Investments Limited | Real estate | 2021 |
| A H Maciag Limited | Health & social care | 2010 |
| A H Palak Ltd | Wholesale & retail | 2012 |
| A H Peck Flooring Contractors Limited | Wholesale & retail | 1995 |
| A H Property and Developments Limited | Construction | 2023 |
| A H T Roofing and Construction Ltd | Construction | 2022 |
| A H Tavistock Street Limited | Hospitality | 2014 |
| A H Tech Ltd | Information & communication | 2010 |
| A H Travel Ltd | Administrative & support | 2017 |
| A H V Schapira Limited | Other services | 2006 |
| A H Warminster Limited | Hospitality | 2024 |
| A Habib Limited | Wholesale & retail | 2023 |
| A Haemmerli Limited | Professional & scientific | 2015 |
| A Half Managed Mind Ltd | Health & social care | 2021 |
| A Halo Ltd | Arts & recreation | 2025 |
| A Halsall Ltd | Professional & scientific | 2024 |
| A Hameed Ltd | Construction | 2014 |
| A Hamson Limited | Transport & logistics | 2023 |
| A Hand Rises Ltd | Information & communication | 2024 |
| A Hand to Hold Ltd | Information & communication | 2025 |
| A Hand With Property Ltd | Real estate | 2025 |
| A Happy Human Company Ltd | Information & communication | 2025 |
| A Happy Place Christian Ministries Ltd | Information & communication | 2013 |
| A Happy Rotho Ltd | Arts & recreation | 2021 |
| A Hard Day's Type Limited | Administrative & support | 2016 |
| A Harmony Production Ltd | Arts & recreation | 2025 |
| A Hart Painting NOT Ltd | Arts & recreation | 2022 |
| A Hartland Ltd | Arts & recreation | 2022 |
| A Hassan Ltd | Health & social care | 2022 |
| A Haus Circle Ltd | Households | 2024 |
| A Head in a HAT Limited | Administrative & support | 2017 |
| A Head of Time Estates Limited | Construction | 2013 |
| A Healthier Earth Limited | Information & communication | 2022 |
| A Hipp Caribbean Shipping Ltd | Transport & logistics | 2011 |
| A Holding Group Ltd | Financial services | 2026 |
| A Holt Limited | Professional & scientific | 2016 |
| A Home 4 U Ltd | Real estate | 2022 |
| A Home Away From Home Ltd | Real estate | 2023 |
| A Home in the Sun (UK) Limited | Real estate | 2013 |
| A Home in the World Ltd | Real estate | 2023 |
| A Home Oxford Ltd | Real estate | 2023 |
| A Home Solution Ltd | Construction | 2026 |
| A Hope Services Ltd | Professional & scientific | 2021 |