| Hornsea Happy Community Centre CIC | Health & social care | 2024 |
| Hornsea Inshore Rescue | Other services | 2010 |
| Hornsea Mortgage Brokers Ltd | Financial services | 2018 |
| Hornsea Nails Ltd | Other services | 2024 |
| Hornsea Pantry Community Interest Company | Hospitality | 2019 |
| Hornsea PUB Company Ltd | Hospitality | 2021 |
| Hornsea Tandoori Limited | Hospitality | 2023 |
| Hornsea Youth CIC | Education | 2026 |
| HPS Estate Agents Limited | Real estate | 2007 |
| HQS Services Ltd | Professional & scientific | 2020 |
| Hull & Yorkshire Concrete Testing Ltd | Professional & scientific | 2020 |
| Hunter's Renovations Limited | Construction | 2024 |
| HWP Limited | Professional & scientific | 2006 |
| IES (Integrated Engineering Services) Limited | Information & communication | 1993 |
| Ilyas Barber Ltd | Other services | 2023 |
| Independent Drivers Limited | Professional & scientific | 2005 |
| Jamie Madsen Services Limited | Administrative & support | 2020 |
| Japra Consulting Limited | Information & communication | 2022 |
| Jezzine Ltd | Real estate | 2024 |
| JH Pics & Construction Ltd | Construction | 2019 |
| JMO Animal Health Limited | Professional & scientific | 2023 |
| John's Benches Ltd | Manufacturing | 2024 |
| Jona Developments (Yorkshire) Ltd | Construction | 2025 |
| Jounieh Ltd | Wholesale & retail | 2018 |
| K a Petch and SON Contracting Limited | Agriculture & fishing | 2026 |
| K&L Groundworks Yorkshire Ltd | Construction | 2020 |
| Katrina Garton Estates Ltd | Real estate | 2024 |
| Kemp High Performance Engines Limited | Wholesale & retail | 2010 |
| Kemp Property LLP | | 2005 |
| Keriswood Limited | Construction | 2005 |
| KGS Limited | Professional & scientific | 1999 |
| KGS Property Holdings Limited | Real estate | 2023 |
| Kingfisher Domiciliary Home Care Limited | Health & social care | 2018 |
| Kitcher Solutions Ltd | Information & communication | 2026 |
| Kolgecaj Holding Ltd | Real estate | 2024 |
| Laprie Ltd | Hospitality | 2025 |
| Lapries Self Catering Apartments Ltd | Hospitality | 2025 |
| Lets Host Holiday Homes Ltd | Real estate | 2021 |
| Levelfield Developements Ltd | Construction | 2021 |
| Levelfield Investments Ltd | Real estate | 2019 |
| Levelfield Properties Ltd | Real estate | 2019 |
| Longbeach Leisure Limited | Hospitality | 1991 |
| Loremar Limited | Mining & quarrying | 2005 |
| Lotus Garden 2022 Ltd | Hospitality | 2022 |
| Lounge Hornsea Ltd | Hospitality | 2023 |
| Loveridge Landscapes Limited | Administrative & support | 2023 |
| Lucien's Bar Ltd | Hospitality | 2024 |
| LYN Walton Wealth Management Ltd | Financial services | 2021 |
| M&E Construction Group Ltd | Construction | 2026 |
| M.A. Plumbing (Yorkshire) Ltd | Construction | 2018 |
| M.B. & J. Goodwin Limited | Agriculture & fishing | 1972 |
| M.B. Goodwin (Skipsea) Limited | Agriculture & fishing | 1976 |
| M3 Leisure Development Consulting Ltd | Construction | 2022 |
| Mappleton Beach Tearooms Ltd | Wholesale & retail | 2024 |
| Marange Ltd | Hospitality | 2024 |
| Mately Limited | Information & communication | 2026 |
| Mere and Strand Limited | Real estate | 2025 |
| Mereside Consulting Ltd | Professional & scientific | 2012 |
| Mereside Racing Limited | Arts & recreation | 2018 |
| Mick Bateman Roofing Limited | Construction | 2011 |
| Mighty Oaks Wellbeing Club Limited | Education | 2026 |
| Mille Sapori Ltd | Hospitality | 2026 |
| Mondo Kitchen Food Limited | Hospitality | 2025 |
| MRH Motor Services Ltd | Wholesale & retail | 2023 |
| Multiworks Building Services Limited | Construction | 2025 |
| Multiworks Landscaping Services Ltd | Construction | 2026 |
| NAZ Food Hornsea Limited | Hospitality | 2023 |
| New Begin Hornsea Ltd | Hospitality | 2020 |
| New Beginnings Hair Studio Ltd | Other services | 2021 |
| New Bites Ltd | Hospitality | 2022 |
| Newbegin 81 Ltd | Hospitality | 2026 |
| Newmount Films Ltd | Information & communication | 2021 |
| North Holderness Community Transport Ltd | Transport & logistics | 2003 |
| Northbank Wool Limited | Wholesale & retail | 2010 |
| Northbar Resources Ltd | Extraterritorial | 2010 |
| Northside Consultancy Limited | Professional & scientific | 2008 |
| Number Nine the Marketplace Ltd | Wholesale & retail | 2023 |
| Oakhurst Services (Plumbing and Heating) Limited | Construction | 2002 |
| Offshoreiq Ltd | Construction | 2026 |
| Onyc Consulting Limited | Professional & scientific | 2009 |
| Osana Ltd | Information & communication | 2024 |
| P and S Dove Holdings Limited | Hospitality | 2022 |
| P D Sharp Builders Limited | Construction | 2019 |
| P. Sharp Builders Limited | Construction | 2025 |
| P.J. Lorriman & Co Limited | Professional & scientific | 2000 |
| Park Leisure Marketing Limited | Hospitality | 1999 |
| Parr Plant Services Limited | Construction | 2016 |
| Patli Ltd | Hospitality | 2024 |
| Peak Property JT Ltd | Real estate | 2026 |
| Peel Veterinary Clinic Ltd | Professional & scientific | 2015 |
| Perks Online Ltd | Information & communication | 2020 |
| Petals Pets & Paws Limited | Wholesale & retail | 2009 |
| PGT Property Investments Ltd | Real estate | 2026 |
| Pk-Ceng Ltd | Professional & scientific | 2023 |
| Potters Way Ltd | Hospitality | 2024 |
| Prizes for Good Causes Limited | Other services | 2012 |
| Prodcollab Ltd | Information & communication | 2026 |
| PUB in a DUB Ltd | Hospitality | 2017 |
| PW Car Sales Ltd | Wholesale & retail | 2024 |
| Quack Consultancy Ltd | Professional & scientific | 2025 |