| Heat Doctor Limited | Extraterritorial | 2003 |
| Heather Shaw Consulting Limited | Administrative & support | 2026 |
| Heaton Property Rental Ltd | Real estate | 2016 |
| Helping Hands of Angels Limited | Health & social care | 2022 |
| Hers and Sirs Hairdressing and Barbers Ltd | Other services | 2018 |
| HF Works C.I.C. | Health & social care | 2023 |
| Hidden Havana Ltd | Hospitality | 2025 |
| Hifi Packaging Ltd. | Wholesale & retail | 2011 |
| Hifisecondhand Ltd. | Wholesale & retail | 2011 |
| High Class Paving Supplies Ltd | Wholesale & retail | 2021 |
| High Crest Developments Ltd | Real estate | 2019 |
| Higher Folds Community Centre (Leigh) Limited | Other services | 1998 |
| Highstyle Construction Ltd | Manufacturing | 2021 |
| Hindley Green Hand Car Wash Ltd | Administrative & support | 2018 |
| Hive Business Services Limited | Professional & scientific | 2017 |
| Hive Family Limited | Wholesale & retail | 2024 |
| Hive Management Services Limited | Professional & scientific | 2014 |
| HL Cloud Accountants Ltd | Professional & scientific | 2020 |
| HM Spice Lounge Ltd | Hospitality | 2021 |
| Hobson Aerials and Satellite Limited | Professional & scientific | 2008 |
| Hodges Family Butchers Limited | Wholesale & retail | 2019 |
| Hodkinsons (Leigh) Limited | Construction | 1943 |
| Holltow Limited | Transport & logistics | 2020 |
| Home to Stay Limited | Real estate | 2009 |
| Homebuilds N.W. Ltd | Construction | 2020 |
| Homehelp & Clean Co. Limited | Administrative & support | 2025 |
| Hommy Ltd | Wholesale & retail | 2024 |
| Hong Kong Garden (Leigh) Ltd | Hospitality | 2024 |
| Hook and Twist Limited | Information & communication | 2024 |
| Hooley's Bars Ltd | Hospitality | 2019 |
| Hot Frog Limited | Wholesale & retail | 2019 |
| House of Grit and Glory Online Ltd | Education | 2022 |
| House of Jessica Megan Ltd | Education | 2025 |
| House of Sweets (Leigh) Ltd | Wholesale & retail | 2023 |
| Householder Club Limited | Other services | 2016 |
| HP Group UK Ltd | Administrative & support | 2014 |
| HR Scaffolding Limited | Construction | 2010 |
| HS 567 Limited | Professional & scientific | 2012 |
| HS Property Law Limited | Professional & scientific | 2024 |
| HS Recovery (NW) Ltd | Transport & logistics | 2023 |
| Hunter & Thorn Limited | Real estate | 2024 |
| Huperit Limited | Information & communication | 2014 |
| HVW Ltd | Wholesale & retail | 2010 |
| HWC Trading Limited | Manufacturing | 2017 |
| Hyltone Developments Ltd | Construction | 2025 |
| IAN Francis Lettings Ltd | Real estate | 2019 |
| IAR Mini Mart Ltd | Other services | 2025 |
| Iba-Joiner Ltd | Manufacturing | 2022 |
| IBBY786 Ltd | Transport & logistics | 2026 |
| Ice Industrial Solutions Ltd | Transport & logistics | 2025 |
| Icozi Limited | Construction | 2024 |
| ID Design & Marketing Limited | Information & communication | 2012 |
| Iduct Limited | Manufacturing | 2021 |
| IFY Young Ltd | Transport & logistics | 2019 |
| IG Driving Services Limited | Transport & logistics | 2020 |
| Ikaros Enterprises Limited | Hospitality | 2023 |
| Ikywaq&Co Limited | Wholesale & retail | 2025 |
| ILH Products Ltd | Wholesale & retail | 2021 |
| Ilift Access Ltd | Administrative & support | 2025 |
| Ilytics Ltd | Information & communication | 2014 |
| Image Village Limited | Information & communication | 2011 |
| Imagine ACT and Succeed | Health & social care | 2010 |
| Immortal Heritage Ltd | Wholesale & retail | 2023 |
| IMO Law Limited | Professional & scientific | 2014 |
| Impact Holdings (Bolton) Limited | Professional & scientific | 2018 |
| Impactvolt Logistics Ltd | Manufacturing | 2016 |
| Impressed Ironing Laundry Services Ltd | Other services | 2004 |
| IN Home Flooring Ltd | Wholesale & retail | 2025 |
| Independent Crane Examination Services Limited | Other services | 2001 |
| INDIAN1 Takeaway Ltd | Hospitality | 2024 |
| Indigo Ascent Ltd | Information & communication | 2020 |
| Infinity Mobility Group Limited | Wholesale & retail | 2026 |
| Infinity Print & Embroidery 2006 Limited | Wholesale & retail | 2006 |
| Infrasmart Ltd | Real estate | 2021 |
| Inka Jewellery Designs Ltd | Manufacturing | 2019 |
| Inland Logistics Ltd | Transport & logistics | 2014 |
| Innova Build Ltd | Construction | 2025 |
| Innovexa Solutions Ltd | Wholesale & retail | 2026 |
| Insignia Advertising Ltd | Manufacturing | 2014 |
| Integrated Control Solutions Limited | Manufacturing | 1994 |
| Integrated Metal Supplies Limited | Manufacturing | 2003 |
| Integrated Services and Supplies Limited | Manufacturing | 2008 |
| Intelect Lighting Ltd | Wholesale & retail | 2018 |
| Intelligent Development Group Limited | Real estate | 2025 |
| Intelligent Electrical Systems Ltd | Construction | 2018 |
| Intersect Consulting Ltd | Information & communication | 2008 |
| Intersourceservices Limited | Wholesale & retail | 2018 |
| Invisible Patterns Ltd | Wholesale & retail | 2015 |
| IPM Properties Limited | Real estate | 2017 |
| Ironvale Property Group Ltd | Real estate | 2026 |
| Isabella Fashions Ltd | Manufacturing | 2017 |
| Iseal Group Limited | Construction | 2024 |
| Issen Ltd | Hospitality | 2024 |
| Ixtract Ltd | Professional & scientific | 2019 |
| Izoroof Ltd | Construction | 2026 |
| J & M Financial Services Ltd | Financial services | 2019 |
| J & S Commercial Van Sales Ltd | Wholesale & retail | 2003 |
| J & S Properties (Warrington) Ltd | Real estate | 2020 |
| J B Balustrades Ltd | Construction | 2023 |
| J Gregg Roofing Ltd | Construction | 2019 |