| Golden Pavro Ltd | Hospitality | 2024 |
| GOLDENEYE21 Ltd | Real estate | 2024 |
| Goldex Holdings Ltd | Real estate | 2020 |
| Goldex Investments (Essex) Holdings Limited | Financial services | 2020 |
| Goldex Investments (Essex) Limited | Hospitality | 2011 |
| Goldmills Group Limited | Professional & scientific | 2016 |
| Goldmills Logistics Limited | Construction | 2020 |
| Goldmills Recruitment Limited | Administrative & support | 2012 |
| Goldmills Specialist Recruitment Limited | Administrative & support | 2018 |
| Goodwin Flooring Contract Services Limited | Construction | 2014 |
| Gort Enterprises Ltd | Construction | 2023 |
| Gould Standard Limited | Professional & scientific | 2025 |
| Goulding Mechanical Services Ltd | Construction | 2020 |
| Gouldys Gardens Ltd | Administrative & support | 2013 |
| Govani Coaching Limited | Professional & scientific | 2014 |
| Grab an Outfit Limited | Wholesale & retail | 2022 |
| Grace Kelly SPV Limited | Real estate | 2025 |
| Grace Nails Ltd | Other services | 2025 |
| Grand Events Holdings Limited | Hospitality | 2011 |
| Grangewood Building Ltd | Construction | 2022 |
| Grants and Co. Ltd | Construction | 2025 |
| Great Scott Movie Limited | Information & communication | 2023 |
| Greater Heights Learning Centre Limited | Education | 2024 |
| Green Gimlet Ltd | Real estate | 2025 |
| Green Power Services Ltd | Energy | 2024 |
| Green Shoots Consultants Limited | Professional & scientific | 2013 |
| Greenmind Climate Tech Ltd | Information & communication | 2024 |
| Greenwich MOT & Service Centre Limited | Wholesale & retail | 2010 |
| Grosvenor Ensure Ltd | Financial services | 2012 |
| Grosvenor Property Finance Ltd | Financial services | 2017 |
| Grove Hall Nursery Ltd | Other services | 2010 |
| Growdash Limited | Information & communication | 2025 |
| GS Station Cars Ltd | Transport & logistics | 2017 |
| GT Residential Ltd | Construction | 2020 |
| GTL Logistics Ltd | Transport & logistics | 2020 |
| Guanoboost UK Limited | Wholesale & retail | 2023 |
| Guddug Limited | Other services | 2020 |
| GUY Lusty Design Ltd | Arts & recreation | 2017 |
| GW Homes and Properties Ltd | Real estate | 2025 |
| GX Technical Services Limited | Information & communication | 2006 |
| GYE Nyame LOD Solutions Ltd | Health & social care | 2024 |
| Gymnastics Events Ltd | Arts & recreation | 2024 |
| H Plumbing & Heating Ltd | Construction | 2020 |
| H&B Property Rentals Limited | Real estate | 2025 |
| H&L Capital Markets Limited | Financial services | 2017 |
| H.A.M. Digital Limited | Information & communication | 2013 |
| Hacton House Ltd | Professional & scientific | 2024 |
| Hacton Park Corner Farm Limited | Arts & recreation | 1995 |
| Hall of Fame Beauty Studio Limited | Other services | 2023 |
| Hall Site Ltd | Real estate | 2020 |
| Hammock Harmonies Limited | Health & social care | 2024 |
| Hamsard 3229 Limited | Construction | 2010 |
| Handley Flooring & Maintenance Limited | Construction | 2014 |
| Happy Taste Catering Ltd | Hospitality | 2023 |
| HAPPYDAYS04 Ltd | Hospitality | 2023 |
| HAPPYIN7 Ltd | Professional & scientific | 2024 |
| Harcha Investments Ltd | Real estate | 2024 |
| Harringtons of Upminster Bridge Ltd | Wholesale & retail | 2013 |
| Harris Hues Textiles Ltd | Manufacturing | 2025 |
| Harrylovesfrankie Ltd | Wholesale & retail | 2018 |
| Hart Homes Design and Build Ltd | Construction | 2022 |
| Hassle Free Financial Solutions Ltd | Financial services | 2011 |
| Haverbridge Developments Limited | Construction | 2020 |
| Haverbridge Homes Limited | Real estate | 2012 |
| Havering Mind | Health & social care | 2001 |
| Havering Projects Limited | Construction | 2020 |
| Hawk Accounting Limited | Professional & scientific | 2024 |
| Hawkins Accounts Limited | Professional & scientific | 2015 |
| Hawkins Professional Services Limited | Professional & scientific | 2004 |
| Hawkins Tax Limited | Professional & scientific | 2015 |
| Haycocks Garage Ltd | Construction | 2023 |
| Hayes Investment Group Ltd | Financial services | 2023 |
| Hayestrading Ltd | Information & communication | 2025 |
| Hazara Autos Limited | Wholesale & retail | 2023 |
| HBL Hairdressers Ltd | Other services | 2024 |
| HDS Aerial Surveys Limited | Professional & scientific | 2018 |
| HDS Personnel Limited | Administrative & support | 2004 |
| Head Start Education Services Ltd | Education | 2019 |
| Headkandy Hair & Beauty Limited | Other services | 2018 |
| Health and Wellness World Ltd | Other services | 2025 |
| Health at Home Therapy UK Ltd | Health & social care | 2020 |
| Hear ME OUT (Entertainment) Ltd | Information & communication | 2022 |
| Heartbeat Medicare Ltd | Health & social care | 2012 |
| Heath Capital Markets Limited | Financial services | 2014 |
| Heron Transformation Services Ltd | Professional & scientific | 2015 |
| Hesan Services Limited | Wholesale & retail | 2012 |
| High Security Windows and Doors Limited | Construction | 2019 |
| Higherratetaxrebate Ltd | Professional & scientific | 2024 |
| Hiremix Ltd | Transport & logistics | 2016 |
| Hirsch Consultancy Ltd | Administrative & support | 2012 |
| Hirsch Property Ltd | Real estate | 2015 |
| HIT Expert Ltd | Information & communication | 2018 |
| Hitori Willow Collaboration Ltd | Other services | 2025 |
| Hitori Willow Property Ltd | Real estate | 2025 |
| Holloway Ceilings Limited | Construction | 2004 |
| Holly House Holdings Ltd | Financial services | 2023 |
| Holly House Real Estate Ltd | Real estate | 2024 |
| Holmes Care (Nelson) Limited | Health & social care | 2007 |
| Holwood Cars Limited | Wholesale & retail | 2010 |
| Home-Start Havering & Redbridge Ltd | Health & social care | 2005 |