| Hastings Community Hive Ltd | Education | 2021 |
| Hastings Contemporary Trading Limited | Arts & recreation | 2019 |
| Hastings Corner Ltd | Wholesale & retail | 2018 |
| Hastings Edamame Ltd | Hospitality | 2022 |
| Hastings Estates Limited | Real estate | 2012 |
| Hastings Facilities Services Limited | Extraterritorial | 2024 |
| Hastings Fire & Security Limited | Administrative & support | 2024 |
| Hastings FP Services Limited | Administrative & support | 2012 |
| Hastings Fulfilment Ltd | Administrative & support | 2015 |
| Hastings Furniture Service Ltd. | Wholesale & retail | 1988 |
| Hastings Glass Limited | Construction | 2020 |
| Hastings Grab & Groundwork Services Limited | Construction | 2019 |
| Hastings Guest House Ltd | Real estate | 2019 |
| Hastings Gymnastics and Sports Limited | Hospitality | 2016 |
| Hastings Holiday Parks Ltd | Hospitality | 2024 |
| Hastings Homes Renovations Ltd | Construction | 2024 |
| Hastings Housing Company Ltd. | Real estate | 2017 |
| Hastings Independent Press CIC | Information & communication | 2014 |
| Hastings Jazz Festival Ltd | Arts & recreation | 2022 |
| Hastings Jewish Community Ltd | Other services | 2024 |
| Hastings Kelp Project CIC | Professional & scientific | 2024 |
| Hastings Kitchen Cloud Ltd | Hospitality | 2025 |
| Hastings Motorcycle Centre Ltd | Wholesale & retail | 2022 |
| Hastings Musical Festival,Limited(The) | Arts & recreation | 1920 |
| Hastings Oriental Ltd | Wholesale & retail | 2024 |
| Hastings Osteopathic Practice Limited | Health & social care | 2008 |
| Hastings Pride CIC | Education | 2017 |
| Hastings Property Management Limited | Real estate | 2024 |
| Hastings Punk Choir CIC | Arts & recreation | 2024 |
| Hastings Queer History Collective CIC | Arts & recreation | 2025 |
| Hastings Spice Ltd | Hospitality | 2024 |
| Hastings Theatre Project CIC | Arts & recreation | 2023 |
| Hastings Ukrainian Community Support Network CIC | Education | 2025 |
| Hastings United Football Club Limited | Arts & recreation | 1997 |
| Hastings Voluntary Action | Health & social care | 1989 |
| Hastings Webworks Ltd | Information & communication | 2025 |
| Hastings Wood Pizza Ltd | Hospitality | 2024 |
| Hastingspetcentre Limited | Wholesale & retail | 2021 |
| Hatch & Harvest Ltd | Agriculture & fishing | 2025 |
| Havenstone Property Mangement Limited | Construction | 2025 |
| Hayview Lodges Ltd | Hospitality | 2017 |
| Hazelwood View Residents' Company Limited | Households | 2020 |
| Hbbs Limited | Other services | 2007 |
| HC Marketing Limited | Administrative & support | 2018 |
| HCD Architecture & Construction Limited | Construction | 2023 |
| HCP Alpha Limited | Real estate | 2025 |
| Health & Social Support Limited | Health & social care | 2013 |
| Health Connect Partners Ltd | Professional & scientific | 2022 |
| Heart Healthcare Agency Ltd | Administrative & support | 2019 |
| Heart Healthcare Group Ltd | Health & social care | 2021 |
| Heart Scafolding Limited | Construction | 2025 |
| Heartz Properties Ltd | Real estate | 2020 |
| Heat Pump Solutions Limited | Energy | 2020 |
| Heatwave Print Ltd | Extraterritorial | 2018 |
| Heberden Wealth Management LLP | | 2014 |
| Helen Chipchase Consulting Limited | Professional & scientific | 2014 |
| Helen Paterson Limited | Professional & scientific | 2014 |
| Hell Yeah Limited | Arts & recreation | 2015 |
| Helskce Ltd | Health & social care | 2017 |
| Henderson Mckenzie Limited | Administrative & support | 2015 |
| Hengsu Technology Co., Ltd | Wholesale & retail | 2026 |
| Herbie and Olive Ventures Ltd | Financial services | 2025 |
| Heringtons LLP | | 2012 |
| Herme Tech Limited | Extraterritorial | 2016 |
| Heron and Gull Limited | Education | 2017 |
| HEY Ellie Ltd | Wholesale & retail | 2026 |
| HG Vaughan Consultancy Limited | Professional & scientific | 2024 |
| HG8 Limited | Real estate | 2025 |
| HH Football Recruitment Ltd | Education | 2024 |
| Hi-Tec Timber Merchants Limited | Wholesale & retail | 2003 |
| Hickmet Hotels Limited | | 1998 |
| High & Mighty Building Limited | Construction | 2018 |
| High & Mighty Scaffold Limited | Construction | 2018 |
| High Paddocks Properties Limited | Real estate | 2024 |
| High Rocks Publicity Limited | Information & communication | 2005 |
| High School Hamlet CIC | Arts & recreation | 2026 |
| High Security Alarms Limited | Administrative & support | 2007 |
| Highgate Woodlands Limited | Real estate | 1991 |
| Highly Polished Ltd | Professional & scientific | 2021 |
| Hikes on Sea Ltd | Arts & recreation | 2000 |
| HIL Property Ltd | Real estate | 2019 |
| Hill & Aubrey Ltd | Information & communication | 2014 |
| Hill Business Services Limited | Other services | 2015 |
| Hill Road (Fairlight) Limited | Households | 2011 |
| Hill Surveyors (South East) Limited | Professional & scientific | 2024 |
| Hillfield Properties Limited | Real estate | 1999 |
| Hillside (Crowborough) Management Limited | Households | 1985 |
| Hillside House RTM Company Ltd | Households | 2011 |
| Hillside Residents Association (Eastbourne) Limited | Households | 1998 |
| Hillthorn Homes Limited | Construction | 2020 |
| Hitting the Sweet Spot CIC | Education | 2024 |
| Hivac Engineering Ltd | Manufacturing | 1998 |
| HK Planning Limited | Professional & scientific | 2021 |
| HLA Limited | Health & social care | 2001 |
| Hm-El Properties Limited | Real estate | 2020 |
| Hobart Court Property Management Ltd. | Real estate | 1991 |
| Hodd Contractors Ltd | Construction | 2025 |
| Holden & Co LLP | | 2011 |
| Holden Law Limited | Professional & scientific | 2005 |
| Hollington Court Residents Association Limited | Households | 1961 |