| Goodgrubclub Ltd | Manufacturing | 2016 |
| Grand Old Oak Developments Ltd | Construction | 2006 |
| Grant and Budds LLP | | 2020 |
| Grant Matthewson Limited | Professional & scientific | 2002 |
| Greenchase Construction Ltd | Construction | 2017 |
| Greencomp Limited | Water & waste | 2008 |
| Greenfield Architecture Limited | Professional & scientific | 2021 |
| Greentree Financial Planning Ltd | Financial services | 2015 |
| Gregson Kirby Ltd | Other services | 2026 |
| Gridshark Ltd | Arts & recreation | 2023 |
| Gurney Reeve & Co.Limited | Manufacturing | 1954 |
| H Young Group Limited | Manufacturing | 2020 |
| H.Semmence & Co. Limited | Transport & logistics | 1962 |
| HA Communications Limited | Wholesale & retail | 2025 |
| Hair Design (Wymondham) Ltd | Other services | 2023 |
| Hannah Spence Medical Limited | Health & social care | 2024 |
| Harriet Colquhoun Ltd | Health & social care | 2020 |
| Hartons Properties Ltd | Real estate | 2024 |
| Haul Planner Ltd | Transport & logistics | 2025 |
| Hawkins Plumbing and Heating (Norfolk) Limited | Construction | 2024 |
| Hc-Star Ltd | Professional & scientific | 2023 |
| Headifen Coding Ltd | Information & communication | 2025 |
| Healthwatch Norfolk | Public administration | 2013 |
| Heartbreaker Stud Ltd | Agriculture & fishing | 2020 |
| Heat Engines Limited | Professional & scientific | 2013 |
| Heath Gray Homes Limited | Construction | 2021 |
| Hemp-Lime Spray Limited | Construction | 2017 |
| Henry Cooper Consultants Ltd | Administrative & support | 2024 |
| Hethel Farming Limited | Agriculture & fishing | 2010 |
| Hethel Properties Limited | Real estate | 1964 |
| Hethersett Electrical & Air Conditioning Ltd | Construction | 2025 |
| HIB Group Ltd | Financial services | 2021 |
| Hicks Flooring Limited | Construction | 2006 |
| Hiddenhits Ltd | Wholesale & retail | 2026 |
| High Oak Holidays Ltd | Hospitality | 2018 |
| Hillcrest Mushrooms Limited | Transport & logistics | 2011 |
| Hippo Creation Limited | Wholesale & retail | 2021 |
| Hippo Creative Limited | Wholesale & retail | 2021 |
| Holistic Trader Ltd | Wholesale & retail | 2007 |
| Home Time Movers Ltd | Transport & logistics | 2022 |
| Homestyle Book-Keeping Ltd | Other services | 2019 |
| Hope Community Church (Wymondham) | Other services | 2008 |
| Horizon Media Group Ltd | Professional & scientific | 2025 |
| Horsenden Estates Limited | Real estate | 1938 |
| House of Panels Ltd | Manufacturing | 2025 |
| House to Home Norfolk Limited | Administrative & support | 2026 |
| HSA 2.0 Limited | Other services | 2024 |
| Hub Community Project | Health & social care | 2009 |
| Hudson Property Holdings Limited | Real estate | 2022 |
| Hummingbird Preschool Limited | Education | 2015 |
| Huxley Events Limited | Professional & scientific | 2020 |
| Hyperworks Limited | Professional & scientific | 2002 |
| I P Road Sweepers Ltd | Construction | 2020 |
| I-Fortify Security Ltd | Information & communication | 2025 |
| Iconiq ME Ltd | Other services | 2025 |
| Ikonic Architecture Ltd | Professional & scientific | 2024 |
| Ilearn Universal Academy Ltd | Education | 2022 |
| Iloveuke CIC | Education | 2025 |
| Image Hair Design Limited | Other services | 2008 |
| Imprint Signs and Graphics Ltd | Manufacturing | 2015 |
| IN a Pickle Marketing Research Limited | Professional & scientific | 2002 |
| Indie Ventures Ltd | Administrative & support | 2022 |
| Inforec UK Limited | Extraterritorial | 2012 |
| Informed IT Solutions Limited | Information & communication | 2005 |
| Inheritec Limited | Information & communication | 2024 |
| Initial Plumbing and Heating Ltd | Construction | 2014 |
| Innoedge Ltd | Information & communication | 2023 |
| Insightecon Ltd | Information & communication | 2015 |
| Inspired Building Ltd | Construction | 2023 |
| Install Glazing Solutions Limited | Construction | 2025 |
| Internet Geeks Limited | Information & communication | 2006 |
| Inturn Group Limited | Extraterritorial | 2009 |
| Inturn Industries Limited | Extraterritorial | 2014 |
| Inturn Trading Limited | Manufacturing | 2004 |
| Iplh Limited | Real estate | 2020 |
| ISQ Recruitment Ltd | Administrative & support | 2020 |
| ITL Properties Limited | Real estate | 2013 |
| J & S C Quality Branded Foods Ltd | Hospitality | 1996 |
| J Anderson Logistics Ltd | Transport & logistics | 2024 |
| J Barber Films Ltd | Information & communication | 2018 |
| J Calagui Ltd | Wholesale & retail | 2025 |
| J S Tipper Hire Ltd | Construction | 2015 |
| J&G Trading Ltd | Real estate | 2021 |
| J.Macc Plumbing & Heating Limited | Construction | 2025 |
| J.R. Arboriculture Ltd | Administrative & support | 2020 |
| JA Composites Limited | Manufacturing | 2024 |
| JAB Aviation Services Ltd | Manufacturing | 2021 |
| Jack Brock Ltd | Administrative & support | 2018 |
| James Wiltshire Media Ltd | Information & communication | 2023 |
| JB88 Investments Limited | Administrative & support | 2018 |
| JC Electech Ltd | Construction | 2024 |
| JDL Automation Ltd | Construction | 2025 |
| Jellium Ltd | Extraterritorial | 2026 |
| Jenna Maudlin Designs Ltd | Professional & scientific | 2023 |
| Jeremy Neave Electrician Limited | Construction | 2009 |
| JES Consulting EA Ltd | Professional & scientific | 2025 |
| Jet&Jes Properties Ltd | Real estate | 2021 |
| JFH Accountants Ltd | Professional & scientific | 2024 |
| JI Nuclear Safety Management Ltd | Public administration | 2024 |
| Jigsaw Homes (Norfolk) Limited | Construction | 2026 |