| Grand Developments Design & Build Ltd | Construction | 2023 |
| Grandgo Ltd | Wholesale & retail | 2026 |
| Grange Park NW Ltd | Hospitality | 2025 |
| Grantley Holdings Limited | Financial services | 2020 |
| Grasidi Ground Care Limited | Other services | 2012 |
| Grasidi Grounds Maintenance Limited | Administrative & support | 2021 |
| Gravityrigs Ltd | Arts & recreation | 2020 |
| Gray Shielding UK Ltd | Manufacturing | 2022 |
| Great Discoverations Ltd | Arts & recreation | 2026 |
| Great Eccleston Medical Supplies Limited | Wholesale & retail | 1997 |
| Green 'N' Organic Limited | Wholesale & retail | 2007 |
| Green Circle Direct Limited | Other services | 2020 |
| Green Circle Safety Ltd | Public administration | 2025 |
| Green Dragon Holdings Limited | Construction | 2019 |
| Green Drive Mini Market Limited | Wholesale & retail | 2025 |
| Green Life Pharma Limited | Wholesale & retail | 2016 |
| Green Living NW Limited | Construction | 2022 |
| Green Pastures Health Solutions Ltd | Professional & scientific | 2026 |
| Green Pastures Holdings Ltd | Financial services | 2023 |
| Greenfield Osteopathic Practice Limited | Health & social care | 2002 |
| Greenside Painting Ltd | Construction | 2017 |
| Greensite Energy Group Ltd | Construction | 2025 |
| Greenway Real Estate Ltd | Real estate | 2019 |
| Greenwood ST Helens Ltd | Hospitality | 2025 |
| Greg Draper Auto Logistics Limited | Transport & logistics | 2015 |
| Gregorys Joinery Ltd | Construction | 2025 |
| Grenstone Limited | Real estate | 2012 |
| Grey Leaf Housing Ltd | Real estate | 2021 |
| Griffin Properties (North West) Ltd | Real estate | 2025 |
| Grosvenor Property Sales Limited | Real estate | 2014 |
| Grouprai Limited | Information & communication | 2025 |
| GRX Ventures Ltd | Wholesale & retail | 2025 |
| GT Procurement Limited | Professional & scientific | 2015 |
| GTZ Developments Ltd | Real estate | 2016 |
| Guardian Fire Safety Limited | Professional & scientific | 2024 |
| Guardian Street Healthcare Ltd | Wholesale & retail | 2024 |
| GUD Builders Limited | Construction | 2003 |
| Guiding Stars Care Limited | Health & social care | 2024 |
| Guilty Applause Ltd | Administrative & support | 2025 |
| GV Legal Consultancy Services Limited | Professional & scientific | 2022 |
| Gwesty CWN Ltd | Real estate | 2025 |
| GXA Transport Ltd | Manufacturing | 2020 |
| Gyromania Greek Ltd | Hospitality | 2025 |
| Gyros ST Helens Ltd | Hospitality | 2026 |
| H K Barber ST Helens Ltd | Other services | 2024 |
| H L Property 2022 Limited | Households | 2022 |
| H&H Real Estate Property Management Ltd | Real estate | 2025 |
| H&S Builders Merch Ltd | Transport & logistics | 2014 |
| Haggerty Civils Ltd | Construction | 2026 |
| Halal Quality Butcher (ST Helens) Limited | Wholesale & retail | 2025 |
| Hale Village Limited | Wholesale & retail | 2003 |
| Halina Supplies Ltd. | Real estate | 2001 |
| Hall Bros.(St.Helens)Limited | Information & communication | 1961 |
| Hall Street Management Company NO. 1 Limited | Households | 2020 |
| Halliden Services Ltd | Information & communication | 2016 |
| Hamilton Courier Services Ltd | Transport & logistics | 2024 |
| Hamlet Lodges Limited | Hospitality | 2025 |
| Hamshirez Ltd | Wholesale & retail | 2025 |
| Hand in Hand Homecare Agency Limited | Health & social care | 2013 |
| Hannah Clarke Advanced Skin and Beauty Ltd | Other services | 2023 |
| Hannah Clarke Ltd | Real estate | 2016 |
| Happy Nails ST. Helens Ltd | Other services | 2026 |
| Happy Paws-Pet Supplies and Canine Service Ltd | Professional & scientific | 2022 |
| Happy Season ST Helens Ltd | Hospitality | 2025 |
| Happy ‘S Nails & Spa Ltd | Other services | 2024 |
| Hard Lane Social Ltd | Hospitality | 2025 |
| Harding Facades Ltd | Construction | 2020 |
| Harlow Foods Ltd | Hospitality | 2025 |
| Harmony Hill Productions Limited | Information & communication | 2025 |
| Harold Percival Group Limited | Hospitality | 2015 |
| Harper Property Ltd | Real estate | 2026 |
| Harrison Holdings (NW) Limited | Construction | 2023 |
| Harwill Homes Limited | Construction | 2017 |
| Harwill Travel Ltd | Administrative & support | 2022 |
| Hathersage Healthcare Limited | Wholesale & retail | 2017 |
| Hattons Transport Limited | Transport & logistics | 2011 |
| Haunted Adventures Ltd | Administrative & support | 2020 |
| Haven Accommodation Group Ltd | Real estate | 2026 |
| Havencrest Homes Limited | Real estate | 2025 |
| Haydock Holdco Limited | Financial services | 2025 |
| Haydock Home Improvement Sales Ltd | Wholesale & retail | 2021 |
| Haydock Lodge Company Ltd | Real estate | 2018 |
| Haydock Medical Company Ltd | Construction | 2013 |
| Haydock Store Ltd | Wholesale & retail | 2023 |
| Haydock Supper Bar Ltd | Hospitality | 2020 |
| Haydock Tyre and Services Ltd | Wholesale & retail | 2025 |
| Hayes Electrical Limited | Construction | 2015 |
| Hayes Facilities Ltd | Construction | 2022 |
| HAZ Barber Haydock Ltd | Other services | 2025 |
| Hazlite Ltd | Manufacturing | 2019 |
| HB Engineering Consultants Limited | Construction | 2011 |
| HCR Beauty Holdings Ltd | Real estate | 2021 |
| Head Quarters (HQ) Ltd | Hospitality | 2019 |
| Health Accelerate Ltd | Health & social care | 2023 |
| Healthwatch ST Helens Limited | Health & social care | 2013 |
| Heartdesign Limited | Information & communication | 2008 |
| Heat My House Ltd | Construction | 2024 |
| Heat on Plumbing and Heating Ltd | Construction | 2024 |
| Heatcare Renewable Energy Ltd | Manufacturing | 2011 |
| Heating Services Holdings Ltd | Construction | 2025 |