| Hollie Quinn Ltd | Wholesale & retail | 2022 |
| Holmes & Hill Properties Ltd | Real estate | 2022 |
| Homestead Farm Supplies Limited | Wholesale & retail | 2007 |
| Hops Farm Ltd | Hospitality | 2020 |
| Horsley Crossfield Limited | Construction | 2023 |
| House of Lawford Ltd | Wholesale & retail | 2026 |
| Howard Sharp and Associates Limited | Professional & scientific | 2012 |
| HP Hygiene Ltd | Health & social care | 2024 |
| Hudson Tech Limited | Professional & scientific | 2010 |
| Hugo.Fm Games Limited | Information & communication | 2023 |
| Hugo.Fm Limited | Information & communication | 2019 |
| I Heart Dylan Ltd | Wholesale & retail | 2022 |
| IAN Smillie Limited | Professional & scientific | 2002 |
| Icusafe Ltd | Information & communication | 2021 |
| Ikons Global Limited | Administrative & support | 2017 |
| Ilecs Limited | Administrative & support | 2001 |
| Ilecs Trustees Limited | Financial services | 2025 |
| Industrial Acoustic Design Ltd | Professional & scientific | 2015 |
| Infinity Training and Assessing Ltd | Professional & scientific | 2013 |
| Innvelocity Ltd | Manufacturing | 2018 |
| Inside OUT Office & Warehouse Cleaning Ltd | Administrative & support | 2012 |
| Insight Sonography Ltd | Administrative & support | 2026 |
| International Arts and Cultural Projects Ltd | Arts & recreation | 2022 |
| International Model Management Limited | Administrative & support | 1996 |
| Invigorate Medical Ltd | Health & social care | 2022 |
| Iris Films Ltd | Information & communication | 2018 |
| Island Networks Limited | Professional & scientific | 1999 |
| J & EP Brewer Ltd | Agriculture & fishing | 2015 |
| J P Pryor Limited | Professional & scientific | 2011 |
| Jabadao | Education | 1989 |
| JAD Contracts Ltd | Administrative & support | 2015 |
| JCA Agricultural Holdings Limited | Financial services | 2026 |
| JDM Storage Ltd | Transport & logistics | 2016 |
| Jennings & Partnership Ltd | Professional & scientific | 2024 |
| Jezcap Limited | Financial services | 2016 |
| Jjlb Projects Ltd | Construction | 2024 |
| JMW Medical Ltd | Health & social care | 2026 |
| John Jiggens Limited | Agriculture & fishing | 2010 |
| John O'Connor Sculpture Ltd | Arts & recreation | 2019 |
| John R.Keeble and Son(Brantham)Limited | Agriculture & fishing | 1948 |
| John West Planning & Management Consultant Limited | Professional & scientific | 2001 |
| Johnstones SDM Ltd | Extraterritorial | 2018 |
| JP Fencing & Landscaping Ltd | Administrative & support | 2025 |
| Jssc Services Limited | Professional & scientific | 2017 |
| Judson Developments Ltd | Construction | 2021 |
| Jules Dog Grooming Limited | Other services | 2019 |
| Just Parrots Limited | Wholesale & retail | 2019 |
| Just True Ltd | Health & social care | 2022 |
| K & G Roofing and SON Ltd | Construction | 2022 |
| K J H Marine Ltd | Manufacturing | 2018 |
| Kaneas Limited | Construction | 2022 |
| Kara Pizza Ltd | Hospitality | 2026 |
| Keel Services Limited | Manufacturing | 2013 |
| Kenbros Limited | Hospitality | 2008 |
| Kingsview Solutions Limited | Financial services | 1998 |
| Kingswood Building and Electrical Contractors Limited | Construction | 1996 |
| Kingswood Property Limited | Construction | 2004 |
| Kingswood Real Estate Limited | Real estate | 2001 |
| Kirby Rookyard Limited | Professional & scientific | 2006 |
| KKA Storage Ltd | Hospitality | 2026 |
| KPB Electrical Services Ltd | Energy | 2026 |
| KR Cars Limited | Wholesale & retail | 2014 |
| Krbs Property Ltd | Real estate | 2021 |
| LA Bonté Catering CIC | Wholesale & retail | 2025 |
| Lagoon Co Beauty Ltd | Wholesale & retail | 2020 |
| Lane Farm Haulage Ltd | Transport & logistics | 2002 |
| Launay Consultancy Limited | Professional & scientific | 2020 |
| Lawford Green Management Company Limited | Households | 2023 |
| Lawford Housing Enterprise Trust | Real estate | 2014 |
| Lawford Service Station Limited | Wholesale & retail | 1990 |
| Leadership Impact Ltd | Professional & scientific | 2024 |
| Leapalong Ltd | Education | 2012 |
| Legend Trainers Ltd | Wholesale & retail | 2025 |
| Lens Ideas Limited | Professional & scientific | 2021 |
| Leocat Ltd | Financial services | 2021 |
| Leogood TM Limited | Construction | 2024 |
| Leopard Capital Consulting Limited | Administrative & support | 2007 |
| Level Engineering Limited | Financial services | 1994 |
| LGL Household Maintenance Limited | Other services | 2024 |
| LGL Laundry and Ironing Service Limited | Other services | 2024 |
| Lipscombe Developments Limited | Construction | 2007 |
| Little Bear Bar Ltd | Hospitality | 2026 |
| Little Pumpkins Pre-School C.I.C. | Education | 2010 |
| Lodge 5 Limited | Real estate | 2020 |
| Logicmove Storage Solutions Limited | Hospitality | 2006 |
| Lombardi Properties Ltd | Real estate | 2020 |
| Lonergan Mechanical & Electrical Services Ltd | Professional & scientific | 2021 |
| Lumberjacks Limited | Wholesale & retail | 1999 |
| Lumia Attilburgh House Limited | Real estate | 2017 |
| Lumia Commercial Limited | Real estate | 2006 |
| Lumia Developments Limited | Real estate | 2008 |
| Lumia Lands Limited | Real estate | 2007 |
| Lumia Lofts Limited | Real estate | 2008 |
| Lumia Ltd | Real estate | 2005 |
| Lumia Management Limited | Real estate | 2016 |
| Lumia Newhams Yard Limited | Real estate | 2020 |
| Lumia Pope Street Limited | Real estate | 2018 |
| Lumia Property Group Limited | Financial services | 2020 |
| Lumia Real Estate Limited | Real estate | 2008 |
| Lumia VC Limited | Real estate | 2016 |