| Gilbert House Residents Association Limited | Households | 2006 |
| Gilbertson's Limited | Construction | 2015 |
| Gillhams Holidays UK Limited | Administrative & support | 2019 |
| Gimble Properties Ltd | Real estate | 2024 |
| Girls That Scuba Limited | Wholesale & retail | 2020 |
| GK Developments (Groombridge) Limited | Construction | 2011 |
| GK Investment Properties LLP | | 2011 |
| GLA Developments Ltd | Construction | 2011 |
| Gleam Cleaning Ltd | Administrative & support | 2023 |
| Gleampath Limited | Manufacturing | 2001 |
| Glen Normoyle Drylining & Plastering Limited | Construction | 2008 |
| Global RE Broking Solutions Limited | Financial services | 2009 |
| Global Skills Academy Ltd | Education | 2025 |
| Glow Inspire Ltd | Education | 2020 |
| GM Management 2012 LLP | | 2012 |
| GMC Clinical and Diagnostic Consulting Limited | Information & communication | 2025 |
| Go Join in Limited | Information & communication | 2024 |
| Goat Ledge Ltd | Hospitality | 2017 |
| Gods Generals Mission Outreach Limited | Professional & scientific | 2021 |
| Godwin Productions Ltd | Arts & recreation | 2023 |
| Gold Boots CIC | Professional & scientific | 2025 |
| Gold Pebble Ltd | Information & communication | 2021 |
| Gold Star Scaffolding Ltd | Construction | 2021 |
| Goldstar IT Consultancy Ltd | Information & communication | 2016 |
| Gomv Services Limited | Professional & scientific | 2022 |
| Good Bean MAD Coffee Limited | Hospitality | 2022 |
| Good on Greens Ltd | Wholesale & retail | 2019 |
| Goose & Badger Cafe & Bar Ltd | Hospitality | 2024 |
| Goose & Badger Coffee Ltd | Manufacturing | 2023 |
| Gordafarid Media Ltd | Professional & scientific | 2019 |
| Gordon Mansions Management Limited | Households | 1997 |
| Gordon Wilson (Process Systems) Limited | Manufacturing | 1980 |
| Gould Publishing Ltd | Information & communication | 2006 |
| GPS (South East) Ltd | Construction | 2026 |
| Grand Elektra Entertainments Limited | Hospitality | 2016 |
| Grand-Ville Law Limited | Professional & scientific | 2016 |
| Grangerest Limited | Hospitality | 1981 |
| Grayhound Limited | Wholesale & retail | 2025 |
| Grayson Developments Ltd. | Construction | 2015 |
| Greatorex Ltd | Information & communication | 2025 |
| Green House Bistro Ltd | Hospitality | 2023 |
| Greenbottles Recycling Limited | Water & waste | 2007 |
| Greenbuild Property Development Limited | Real estate | 2016 |
| Greener Freight Limited | Transport & logistics | 2008 |
| Greenheart Enterprises Limited | Health & social care | 1999 |
| Greenpoint Studios Ltd | Arts & recreation | 2015 |
| Grenham Court Limited | Households | 1998 |
| Greyoak Consultancy Limited | Construction | 2020 |
| Greyskull Coffee Ltd | Hospitality | 2025 |
| Greystone by Design Limited | Construction | 2024 |
| Greystones Estate Agents Limited | Real estate | 2009 |
| Greystones Lettings (Bexhill) Ltd | Real estate | 2025 |
| Grjc Holdings Limited | Financial services | 2016 |
| Groove & Thread Ltd | Wholesale & retail | 2025 |
| Grove Fish Ltd | Hospitality | 2024 |
| Grove Food and Wine Ltd | Wholesale & retail | 2023 |
| Grumpy Custard Ltd | Wholesale & retail | 2024 |
| GSM Commercials Ltd | Wholesale & retail | 2001 |
| Guacamaya's Nest Cafe Ltd | Hospitality | 2024 |
| Gullivers Mews Management Limited | Households | 2022 |
| Gunson Fine Wines Limited | Wholesale & retail | 2000 |
| H & T Brickwork Limited | Construction | 2023 |
| H Decor Ltd | Construction | 2021 |
| H. Rafati & Co. Limited | Real estate | 1991 |
| Hailsham News Limited | Extraterritorial | 2022 |
| Hair SHE Goes and Beauty Ltd | Other services | 2026 |
| Half MAN Half Burger (Four) Limited | Hospitality | 2021 |
| Half MAN Half Burger (One) Limited | Hospitality | 2014 |
| Half MAN Half Burger Holdings Limited | Financial services | 2017 |
| Half MAN Half Burger LLP | | 2015 |
| Half MAN Half Burger Three Limited | Hospitality | 2018 |
| Handyman Hastings Ltd | Construction | 2024 |
| Hanlon & Rhodes Group Limited | Financial services | 2016 |
| Hanlon & Rhodes Portfolio a Limited | Real estate | 2018 |
| Hanlon & Rhodes Portfolio B Limited | Real estate | 2018 |
| Hanlon & Rhodes Portfolio C Limited | Real estate | 2019 |
| Hanlon & Rhodes Portfolio D Limited | Real estate | 2022 |
| Happy AI Ltd | Information & communication | 2023 |
| Harbinger Sound Ltd | Information & communication | 2014 |
| Harbour Home Improvements Limited | Construction | 2003 |
| Hare and Hoofe Music Ltd | Information & communication | 2018 |
| Harmonic EGG Hastings Ltd | Other services | 2026 |
| Harrisons Multimedia Limited | Other services | 2005 |
| Harrold Cooper Projects Ltd | Construction | 2021 |
| Hashal Ltd | Wholesale & retail | 2023 |
| Hasting Catering Services Ltd | Hospitality | 2019 |
| Hasting Mini Market Limited | Wholesale & retail | 2024 |
| Hasting Pizza Limited | Hospitality | 2018 |
| Hastings & ST. Leonards Chess Club Limited | Arts & recreation | 2011 |
| Hastings 1066 Ltd | Administrative & support | 2020 |
| Hastings Affordable Living Ltd | Real estate | 2025 |
| Hastings and Bexhill Mencap Society | Health & social care | 2002 |
| Hastings and Rother Legal Services Ltd | Professional & scientific | 2018 |
| Hastings Area Business Crime Reduction Partnership CIC | Administrative & support | 2019 |
| Hastings Beach Supermarket 1 Ltd | Wholesale & retail | 2026 |
| Hastings Beach Supermarket Ltd | Wholesale & retail | 2026 |
| Hastings Builders Company Limited | Construction | 2016 |
| Hastings Building Services Ltd | Construction | 2015 |
| Hastings CMC Development Ltd | Construction | 2024 |
| Hastings Commons Neighbourhood Ventures Ltd | Construction | 2014 |