| Home Farm Wiveton Residents Association Limited(The) | Households | 1983 |
| Hooked Art Ltd | Wholesale & retail | 2022 |
| Horn Pits Limited | Hospitality | 2022 |
| Hotel NR2 Limited | Administrative & support | 2017 |
| HRW Holdings Limited | Administrative & support | 2021 |
| Hudson Property & Lettings Ltd | Real estate | 2026 |
| HUG and Snug Consulting Limited | Other services | 2024 |
| HUT 42 Services Limited | Information & communication | 2016 |
| Hutsoft Group Limited | Financial services | 2020 |
| I AM the Storm Yoga CIC | Health & social care | 2026 |
| I-Coach Academy Limited | Education | 2002 |
| Iksconsultancy Ltd | Information & communication | 2023 |
| Imperial Care Homes Limited | Health & social care | 1999 |
| Inquisitive Type Limited | Information & communication | 2015 |
| Invictus Leadership Ltd | Professional & scientific | 2017 |
| Isaac Shaw Limited | Wholesale & retail | 2024 |
| Issac Shaw Limited | Wholesale & retail | 2024 |
| J&S Shellfish Ltd | Agriculture & fishing | 2024 |
| J.Zsource Ltd | Real estate | 2025 |
| JAS Consulting Services Limited | Professional & scientific | 2024 |
| Jdhc Ltd | Professional & scientific | 2025 |
| Jens Home Journal Ltd | Professional & scientific | 2025 |
| JGP Consulting Ltd | Professional & scientific | 2022 |
| JJE Ventures Ltd | Professional & scientific | 2025 |
| JM Logistics & Constructions Services Limited | Construction | 2025 |
| JRS Digital Ltd | Information & communication | 2016 |
| Juniper BCC Holdings Limited | Financial services | 2025 |
| Juniper PPM Ltd | Construction | 2020 |
| Jurisprudence Consulting Limited | Extraterritorial | 2025 |
| Just Janey Ltd | Administrative & support | 2017 |
| K & M Catering Ltd | Hospitality | 2016 |
| Karl P Wright Ltd | Professional & scientific | 2025 |
| Kelling Designs Limited | Construction | 2006 |
| Kelp&Co Ltd | Wholesale & retail | 2025 |
| Kenninghall Development Management Limited | Real estate | 2009 |
| KH (Holt) Limited | Hospitality | 2018 |
| Kiss Productions Limited | Arts & recreation | 2008 |
| Knights Cloutman LLP | | 2020 |
| Kristina Rutherford Consulting Ltd | Professional & scientific | 2023 |
| Kubez Ltd | Mining & quarrying | 2020 |
| L Tyce Building Services Limited | Construction | 2022 |
| Lake District Holidays Limited | Hospitality | 1998 |
| Larn Developments Limited | Real estate | 2025 |
| LD Coastal Health Limited | Health & social care | 2024 |
| Leather Factory Holt LLP | | 2021 |
| Lekker Holdings Ltd | Professional & scientific | 2019 |
| Let's Dance Retreats Ltd | Arts & recreation | 2024 |
| Letheringsett Mill Ltd | Manufacturing | 2022 |
| LH Driver & ADI Training Ltd | Education | 2025 |
| Lineam Ltd | Arts & recreation | 2026 |
| Little Terraced House Ltd | Information & communication | 2024 |
| LJ Lucas Developments Ltd | Construction | 2026 |
| Louden Ltd | Information & communication | 2024 |
| Louise Goddard - Crawley Limited | Health & social care | 2018 |
| LSL Consultancy Ltd | Administrative & support | 2023 |
| Luxury Cottages (U.K.) Limited | Real estate | 2019 |
| M C a Killin Limited | Professional & scientific | 2014 |
| M H Scargill & SON Limited | Construction | 2006 |
| M Starling & SON Limited | Construction | 2012 |
| Mantle App Limited | Information & communication | 2019 |
| March Accounting Limited | Professional & scientific | 2021 |
| Marillion Properties Limited | Real estate | 2020 |
| Mark Frosdick Ltd | Transport & logistics | 2026 |
| Maxine.Home Ltd | Professional & scientific | 2023 |
| Mayes-Fisher Limited | Construction | 2005 |
| MBX Consulting Limited | Information & communication | 2022 |
| Mclean Pharma Consulting Ltd | Professional & scientific | 2019 |
| Measured Management Limited | Real estate | 2009 |
| Mehron Limited | Wholesale & retail | 2013 |
| Merko (Europe) Ltd | Wholesale & retail | 1993 |
| Meyevision Ltd | Information & communication | 2018 |
| Micah Daniel Ltd | Wholesale & retail | 2026 |
| Michael Cottrell Furniture Ltd | Manufacturing | 2007 |
| Michaelhouse Investments Ltd | Real estate | 2024 |
| Michaelhouse Properties Limited | Real estate | 2016 |
| Millside Property Services Limited | Real estate | 2001 |
| Mindful Atelier Ltd | Other services | 2020 |
| MJR Solutions Norfolk Ltd | Administrative & support | 2012 |
| MLC Marine Ltd | Financial services | 2024 |
| MLC Technologies Ltd | Manufacturing | 2018 |
| MMB Magazine Limited | Information & communication | 2015 |
| MMK Plant Hire Ltd | Administrative & support | 2018 |
| Modus Medica Ltd | Education | 2010 |
| Moffat House Hotel Ltd | Hospitality | 2024 |
| Monarc Developments Ltd | Construction | 2016 |
| Moongazer Cards Ltd | Manufacturing | 2019 |
| Morston Hall Hotels Limited | Hospitality | 1991 |
| Morston Mews Management Ltd | Households | 2018 |
| MP Timm Limited | Construction | 2022 |
| Mulvany & Rogers Ltd | Arts & recreation | 2002 |
| Mustard Retail Limited | Financial services | 2015 |
| Mwhg Ltd | Professional & scientific | 2021 |
| N Sewell Services Limited | Information & communication | 2022 |
| Natural Surroundings Limited | Wholesale & retail | 2006 |
| Nexttek Limited | Information & communication | 2015 |
| NG Safety Training Services Limited | Professional & scientific | 2020 |
| NO More Smells Limited | Extraterritorial | 2019 |
| Norfolk Adventure Limited | Education | 2018 |
| Norfolk Boat (Sail Training) Limited(The) | Health & social care | 1982 |
| Norfolk Coffee Limited | Manufacturing | 2023 |