| Tennant Sherlock Limited | Professional & scientific | 2019 |
| Teresave Limited | Manufacturing | 2019 |
| Terminus Deli Limited | Wholesale & retail | 2023 |
| Terminus Fruit and VEG Ltd | Wholesale & retail | 2026 |
| Terra Libertas Limited | Information & communication | 2010 |
| Tessbird Ltd | Construction | 2018 |
| Testimonium Ltd | Wholesale & retail | 2019 |
| Thai Eastbourne Limited | Hospitality | 2004 |
| Thai Marina Limited | Hospitality | 1999 |
| Thai Nong Khai Limited | Hospitality | 2024 |
| Thakers Limited | Financial services | 2022 |
| Thames Spine Group LLP | | 2020 |
| Thatch House Dental Ltd | Health & social care | 2023 |
| Thaw OUT Heating and Plumbing Limited | Construction | 2016 |
| THE 258 Commemorative Whisky Co Ltd | Wholesale & retail | 2022 |
| THE Accountancy Solution Company Limited | Professional & scientific | 2000 |
| THE Art House (Eastbourne) Limited | Hospitality | 2015 |
| THE Art of Culture UK Limited | Arts & recreation | 2025 |
| THE Arthritic Association | Other services | 2014 |
| THE Arthritis Association | Other services | 2014 |
| THE Artist Service Agency Limited | Professional & scientific | 2025 |
| THE Arts Fundraisers Ltd | Professional & scientific | 2021 |
| THE Ashford Advertiser Limited | Extraterritorial | 1991 |
| THE Aspire D Group Ltd | Financial services | 2020 |
| THE Association of Lighting Designers Ltd | Other services | 2016 |
| THE Audit People Ltd | Professional & scientific | 2009 |
| THE Baby Fayre South East Ltd | Other services | 2024 |
| THE Belgian Cafe Limited | Hospitality | 2008 |
| THE Biggest Deck Ltd | Wholesale & retail | 2025 |
| THE Bloom Factory Ltd | Wholesale & retail | 2017 |
| THE Brain Injury Clinic Limited | Health & social care | 2024 |
| THE Brazz Ltd | Hospitality | 2018 |
| THE Bricklayers Arms Ltd | Hospitality | 2026 |
| THE Bridgemere Centre | Arts & recreation | 1999 |
| THE British Voice Association | Information & communication | 1999 |
| THE Bronze Boutique Group Ltd | Other services | 2026 |
| THE Brow TEC Ltd | Other services | 2020 |
| THE Bull Inn the Green Limited | Hospitality | 2025 |
| THE Candy Shop Eastbourne Limited | Wholesale & retail | 2020 |
| THE Car Clinic Sussex Limited | Wholesale & retail | 2025 |
| THE Card Boys Ltd | Wholesale & retail | 2022 |
| THE Careers People Limited | Education | 2023 |
| THE Castle Inn Bramber Ltd | Hospitality | 2025 |
| THE Certification Group Limited | Professional & scientific | 2016 |
| THE Certification People Ltd | Professional & scientific | 2026 |
| THE Chaseley Trust | Other services | 2001 |
| THE Cheese House Ltd | Wholesale & retail | 2022 |
| THE Childrens Nutritionist Limited | Professional & scientific | 2022 |
| THE Children’S Therapy Company Limited | Health & social care | 2026 |
| THE Clean LAB Project Limited | Health & social care | 2026 |
| THE Club 150 & Company Limited | Hospitality | 2021 |
| THE Conference People Limited | Administrative & support | 2000 |
| THE Consultation Consultancy Limited | Information & communication | 2023 |
| THE Consumer Care Service Limited | Administrative & support | 2016 |
| THE Corner Green Limited | Other services | 2025 |
| THE Cosmetic Dental Gallery (Battersea) Limited | Health & social care | 2021 |
| THE Cosmetic Dental Gallery Ltd | Health & social care | 2019 |
| THE Covalent Bond Ltd | Professional & scientific | 2021 |
| THE Creative Coaching Partnership Limited | Professional & scientific | 1989 |
| THE Croft Residents' Association Limited | Households | 1989 |
| THE Crown House Bar (SE) Ltd | Hospitality | 2004 |
| THE CUE House Limited | Hospitality | 2025 |
| THE Curious Creative (Sussex) Ltd | Arts & recreation | 2022 |
| THE Decorating Centre Limited | Wholesale & retail | 2023 |
| THE Decoy Advisory Company Ltd | Professional & scientific | 2021 |
| THE Deep END Limited | Arts & recreation | 1993 |
| THE Dental Surgery Burnham Limited | Health & social care | 2005 |
| THE Denture Clinic (Sussex) Ltd | Health & social care | 2006 |
| THE Devonshire Collective C.I.C. | Arts & recreation | 2016 |
| THE Digital Workshops Partnership Limited | Information & communication | 2000 |
| THE Doctor Clinic Limited | Health & social care | 2021 |
| THE Doctors Clinic Ltd | Health & social care | 2026 |
| THE Dog Hydrobath Hire Company Ltd | Manufacturing | 2021 |
| THE Dqfs Foundry Limited | Professional & scientific | 2013 |
| THE Duke Practice Ltd | Health & social care | 2020 |
| THE Eagle Eastbourne Limited | Hospitality | 2019 |
| THE East Sussex Group Limited | Construction | 2020 |
| THE Eastbourne and District Chamber of Commerce, Limited | Other services | 1925 |
| THE Eastbourne Society | Arts & recreation | 2010 |
| THE Equine Documentalist Ltd | Education | 2022 |
| THE Exchange Marketing Consultants Limited | Financial services | 2006 |
| THE Farmyard Nursery Limited | Health & social care | 2016 |
| THE Fathers Oversight Advisory Ltd | Professional & scientific | 2025 |
| THE Fatigue Service Ltd | Health & social care | 2025 |
| THE Features Club Ltd | Wholesale & retail | 2019 |
| THE Fitness NED Ltd | Professional & scientific | 2023 |
| THE Fixers Group Limited | Administrative & support | 2016 |
| THE Flat Specialists Limited | Professional & scientific | 2021 |
| THE Food People Limited | Hospitality | 2005 |
| THE Food People Trustee Limited | Extraterritorial | 2025 |
| THE Foundhers Network Limited | Administrative & support | 2026 |
| THE Foundry Types Limited | Professional & scientific | 2019 |
| THE Fountain Inn Plumpton Limited | Hospitality | 2026 |
| THE Fountains Freehold Limited | Households | 2009 |
| THE Frontier Bar Ltd | Hospitality | 2023 |
| THE Frontiers Charitable Trust | Other services | 1997 |
| THE Fundraisers Limited | Professional & scientific | 2022 |
| THE G Factory Ltd | Wholesale & retail | 2020 |
| THE Garden Court (Eastbourne) Management Co. Ltd. | Households | 1998 |
| THE Garden IVY Limited | Wholesale & retail | 2015 |