| High Meadows Kingswinford Management (NO.1) Limited | Households | 1983 |
| High Oakham Ridge Management Company Limited | Households | 2023 |
| High Peak Leisure Ltd | Hospitality | 2025 |
| High Peak Property Management Limited | Households | 2022 |
| High Peak Recycling Limited | Water & waste | 2025 |
| High Performance Engines Limited | Wholesale & retail | 2016 |
| High Q Marketing Limited | Administrative & support | 2011 |
| High Quality Foods Ltd | Hospitality | 2019 |
| High Rank Travel Limited | Administrative & support | 2014 |
| High Reliability Organization Co UK Ltd | Professional & scientific | 2024 |
| High Roller Industrial Doors Ltd | Professional & scientific | 2022 |
| High Skill Centre Ltd | Education | 2017 |
| High Speed Heroes Ltd. | Wholesale & retail | 2016 |
| High Speed Logistics Limited | Transport & logistics | 2020 |
| High Speed Two (HS2) Limited | Transport & logistics | 2009 |
| High Star Properties Ltd | Construction | 2020 |
| High Street 81 Ltd | Administrative & support | 2025 |
| High Street OFF Licence Ltd | Wholesale & retail | 2026 |
| High Stuff Ltd | Hospitality | 2017 |
| High Tech (GB) Ltd | Wholesale & retail | 2015 |
| High Tech Academy Ltd | Information & communication | 2025 |
| High Tech Heating & Plumbing Ltd | Construction | 2026 |
| High Thai Ltd | Hospitality | 2024 |
| High Travel Ltd | Administrative & support | 2009 |
| High Value Manufacturing Catapult | Professional & scientific | 2011 |
| High Volt Electrical Limited | Professional & scientific | 2025 |
| High Voltage Dynamics Ltd | Manufacturing | 2026 |
| High Voltage FUN Limited | Arts & recreation | 2018 |
| High-Vis CIC | Arts & recreation | 2019 |
| Highbridge Propertys Ltd | Construction | 2015 |
| Highbury Forensic Accounting Limited | Professional & scientific | 2024 |
| Highbury Housing Ltd | Real estate | 2024 |
| Highbury Medical Ltd | Health & social care | 2022 |
| Highbury Orchard Community CIC | Agriculture & fishing | 2012 |
| Highbury Property Group Ltd | Construction | 2026 |
| Highbury Stump Grinders Ltd | Agriculture & fishing | 2021 |
| Highbury Tree Services Limited | Agriculture & fishing | 2021 |
| Highcroft Consulting Ltd | Professional & scientific | 2016 |
| Highcroft Ventures Limited | Real estate | 2017 |
| Higher END Limited | Information & communication | 2017 |
| Higher Minds Limited | Education | 2025 |
| Higher Orbit Limited | Wholesale & retail | 2021 |
| Higherland Ltd | Health & social care | 2014 |
| Highfield Bakery Birmingham Ltd | Manufacturing | 2024 |
| Highfield Chippy Ltd | Hospitality | 2026 |
| Highfield Clinic Limited | Health & social care | 2020 |
| Highfield College Limited | Health & social care | 2015 |
| Highfield Court (Studley) Management Company Limited | Households | 2023 |
| Highfield Group Ltd | Real estate | 2018 |
| Highfield Hall Community Club | Professional & scientific | 2014 |
| Highfield Housing and Services Ltd | Administrative & support | 2024 |
| Highfield Housing Limited | Real estate | 2023 |
| Highfield Lodge Ltd | Health & social care | 2018 |
| Highfield Medical Aesthetics Limited | Health & social care | 2026 |
| Highfield Medical and Wellbeing Clinic Ltd | Health & social care | 2026 |
| Highfield MOT & Repair Ltd | Wholesale & retail | 2024 |
| Highfield Naan Shop Ltd | Hospitality | 2023 |
| Highfield Property Agency Limited | Real estate | 2020 |
| Highfield Property Solutions Ltd | Real estate | 2023 |
| Highfield Shop Ltd | Wholesale & retail | 2026 |
| Highfield Snooker Club Limited | Arts & recreation | 2022 |
| Highfield Solutions Ltd | Construction | 2022 |
| Highfield Support Services Ltd | Health & social care | 2013 |
| Highfields OFF License Limited | Wholesale & retail | 2019 |
| Highfort Ltd | Administrative & support | 2024 |
| Highgate Autos Midland Limited | Other services | 2016 |
| Highgate Brewery TAP House Ltd | Hospitality | 2019 |
| Highgate Castings Limited | Manufacturing | 2018 |
| Highgate Community Support Limited | Health & social care | 2018 |
| Highgate Construction Services Limited | Construction | 2015 |
| Highgate Cuisine Ltd | Hospitality | 2024 |
| Highgate Fireworks Ltd | Wholesale & retail | 2026 |
| Highgate Funding Ltd | Financial services | 2019 |
| Highgate Hall Ltd | Hospitality | 2025 |
| Highgate Holdings Limited | Real estate | 2025 |
| Highgate House Development Limited | Construction | 2024 |
| Highgate Housing & Management Ltd | Real estate | 2019 |
| Highgate Market Ltd | Wholesale & retail | 2017 |
| Highgate Poultry Products Ltd | Wholesale & retail | 2015 |
| Highgate Property Group Ltd | Real estate | 2026 |
| Highgate Road Service Station Ltd | Wholesale & retail | 2017 |
| Highgate Shisha Shop Limited | Wholesale & retail | 2025 |
| Highgate Shop Ltd | Wholesale & retail | 2025 |
| Highgrade Ecom Limited | Wholesale & retail | 2020 |
| Highgrade Leather House Limited | Wholesale & retail | 2025 |
| Highklass Services Limited | Administrative & support | 2010 |
| Highland Communications Limited | Transport & logistics | 2002 |
| Highland RAW Ltd | Manufacturing | 2023 |
| Highland Secret Escapes Ltd | Real estate | 2024 |
| Highlander Pubs Limited | Hospitality | 2017 |
| Highley Business Ltd | Hospitality | 2018 |
| Highlight Events UK Ltd | Other services | 2022 |
| Highline Cars Finance and Leasing Ltd | Wholesale & retail | 2015 |
| Highline Housing Ltd | Real estate | 2025 |
| Highline Management Ltd | Construction | 2024 |
| Highmount Property Summerfield Ltd | Real estate | 2024 |
| Highnoon Properties Ltd | Real estate | 2012 |
| Highridge Affordable Housing Limited | Professional & scientific | 2024 |
| Highsale Wholesale Ltd | Wholesale & retail | 2014 |
| Highsky Energy Solutions Limited | Construction | 2025 |