| Greko MED Ltd | Health & social care | 2023 |
| Gresham ( SMS ) Ltd | Public administration | 2012 |
| Grey Cells Investments Ltd | Financial services | 2022 |
| Greyhound Property Investments Ltd | Real estate | 2021 |
| Greystar Limited | Real estate | 1964 |
| Griffin Bespoke Homes Ltd | Construction | 2019 |
| Griffin Property Limited | Real estate | 2019 |
| Grigg Lane Headcorn Residents Management Company Limited | Households | 2016 |
| Grill'Ish Romford Ltd | Hospitality | 2022 |
| Grindin London Ltd | Wholesale & retail | 2020 |
| Gromart Ltd | Construction | 2015 |
| Grosvenor Property Developers Ltd | Real estate | 2016 |
| Ground Figure LLP | | 2010 |
| Ground Rent Ventures Limited | Real estate | 2012 |
| Ground Transporter Ltd | Transport & logistics | 2025 |
| Groundforce Landscaping Ltd | Administrative & support | 2026 |
| Groundintel Ltd | Construction | 2025 |
| Groundworks and Excavations Limited | Extraterritorial | 2022 |
| Grove Farm Estate Holdings Ltd | Agriculture & fishing | 2021 |
| Grow Wild Acai Ltd | Wholesale & retail | 2019 |
| Growing Pains Limited | Professional & scientific | 2026 |
| Growponics Ltd | Agriculture & fishing | 2005 |
| GS Media Limited | Professional & scientific | 2022 |
| Gsgda Limited | Information & communication | 2022 |
| GSN Carpentry Ltd | Manufacturing | 2020 |
| GTA Management Ltd | Real estate | 2018 |
| GTC Advisory Limited | Professional & scientific | 2023 |
| Guard Business Solutions Limited | Information & communication | 2010 |
| GUD GEL Limited | Manufacturing | 2020 |
| Guided Learning Limited | Education | 2018 |
| Guilda Limited | Hospitality | 1972 |
| Gullane Leisure Furniture Limited | Wholesale & retail | 1996 |
| Gulutu Ltd | Wholesale & retail | 2025 |
| Gulutuinteriors Ltd | Wholesale & retail | 2025 |
| Gummy Paint Ltd | Construction | 2025 |
| Gunes Italiaander Ltd | Professional & scientific | 2024 |
| Gunn Roofing Company Ltd | Construction | 2023 |
| Gurbet 27 Ltd | Other services | 2025 |
| Guroo Ltd | Information & communication | 2025 |
| Guru K Limited | Health & social care | 2018 |
| Guru Management Ltd | Professional & scientific | 2018 |
| GV Heating Limited | Construction | 2018 |
| GVA Interiors Limited | Construction | 2019 |
| GWB Engineering Limited | Construction | 2002 |
| Gwesty Cobdens Ltd | Hospitality | 2019 |
| GWP Brickwork Ltd | Construction | 2025 |
| Gym ROX Gymnastics Ltd | Education | 2019 |
| Gym Unit Fitness Clothing Ltd | Wholesale & retail | 2025 |
| Gymnastics Genius Limited | Education | 2020 |
| H & H Barbers Limited | Other services | 2020 |
| H & H London Limited | Hospitality | 2023 |
| H Dental Ltd | Health & social care | 2021 |
| H.L. Decorating Contractors Ltd | Construction | 2000 |
| H.L. Environmental Services Limited | Construction | 2013 |
| Hace Enabling Limited | Professional & scientific | 2015 |
| Hacton Smiles Ltd | Health & social care | 2025 |
| Hadham Construction Limited | Construction | 2013 |
| Hagv Electrical Ltd | Construction | 2025 |
| HAH Whisky Ltd | Wholesale & retail | 2015 |
| Hainault & Chigwell Plumbing Centre Limited | Real estate | 1985 |
| Hair by Elements Ltd | Other services | 2018 |
| Hair Education Ltd | Education | 2014 |
| Hair FUN by Mehjabin Rinty Ltd | Wholesale & retail | 2022 |
| Hair of Essex Ltd | Other services | 2023 |
| Hairhut Essex Ltd | Other services | 2023 |
| Halemoor Corporate Limited | Real estate | 2016 |
| Hallahan Property Development Limited | Construction | 2020 |
| Hallahan Property Lettings Limited | Real estate | 2020 |
| Halligan Brown Ventures Ltd | Extraterritorial | 2025 |
| Hallmark Floor Coverings and Contract Services Limited | Construction | 1998 |
| Halo Creative Media Limited | Professional & scientific | 2023 |
| Hamidia Limited | Arts & recreation | 2020 |
| Hamilton Court (House 6) Flat Management Company Limited | Households | 1994 |
| Hamilton Square Management Company Limited | Households | 1989 |
| Hammond IT Integrations Ltd | Information & communication | 2015 |
| Handbook LAB Ltd | Administrative & support | 2023 |
| Handymax Limited | Construction | 2018 |
| Hank Marvin Protein Ltd | Manufacturing | 2025 |
| Hannah Collins Real Estate Ltd | Real estate | 2026 |
| Hannah Jewels Ltd | Manufacturing | 2025 |
| Hannah Murrell Ltd | Professional & scientific | 2021 |
| Hannah P Skin Clinic Limited | Health & social care | 2020 |
| Hanok BBQ Limited | Hospitality | 2019 |
| Harabros Partnership LLP | | 2023 |
| Harbo Limited | Administrative & support | 2024 |
| Harish Auto Export Limited | Manufacturing | 2011 |
| Harlex International Ltd | Wholesale & retail | 2020 |
| Harlynwood (1-12) Management Company Limited | Households | 1976 |
| Harmonic Trustee Limited | Financial services | 2025 |
| Harold Wood Management Limited | Households | 2013 |
| Harrich Builders Limited | Other services | 1980 |
| Harrington Brothers Contractors Ltd | Construction | 2012 |
| Harris Fabrications Limited | Construction | 1998 |
| Harris Metals Ltd | Wholesale & retail | 2009 |
| Harrison Cook Developments Ltd | Real estate | 2012 |
| Harrison Cook Residential Ltd | Real estate | 2017 |
| Harrison Pearce Limited | Arts & recreation | 2021 |
| Harrod Bespoke Joinery Ltd | Construction | 2014 |
| Harts & Essex Ltd | Wholesale & retail | 2025 |
| Hartswood Quarter Ltd | Households | 2026 |