| Latimer Cottage Trading Ltd | Wholesale & retail | 2024 |
| Lattice Networks Limited | Information & communication | 2025 |
| Lattice Property Management Limited | Real estate | 2020 |
| Laughlin-Mccann Distilleries Limited | Administrative & support | 2011 |
| Launch Property Ltd | Real estate | 2021 |
| LAUNCHPAD2LEARN Limited | Education | 2025 |
| Laundry and Cleaning Ipswich Ltd | Other services | 2025 |
| Lauren Sharp Affiliates Limited | Information & communication | 2025 |
| Lauren Smith Ltd | Real estate | 2014 |
| Lauresco Limited | Hospitality | 2007 |
| Laurselle Legal Ltd | Professional & scientific | 2022 |
| Lavandula Limited | Real estate | 2019 |
| Lavenham Classic and Sports Cars Ltd | Wholesale & retail | 2021 |
| Lavenham Cottages Limited | Professional & scientific | 2010 |
| Lavenham Joinery Holdings Ltd | Financial services | 2023 |
| Laversari Properties Ltd | Real estate | 2025 |
| Lawa Ltd | Hospitality | 2025 |
| Lawes Ventures Ltd | Financial services | 2024 |
| Lawford Education Limited | Information & communication | 2011 |
| Lawford.Com Ltd | Real estate | 2021 |
| Lawns ETC Ltd | Administrative & support | 2025 |
| Lawrence Automotive Limited | Wholesale & retail | 2021 |
| Lawrence Lynsey Limited | Administrative & support | 2013 |
| Lawrence Trading Ltd | Wholesale & retail | 2020 |
| Lawson Planning Partnership Limited | Administrative & support | 2006 |
| Laxmit Ltd | Real estate | 2017 |
| Laxvis Properties Ltd | Real estate | 2015 |
| LAY & Wheeler Limited | Wholesale & retail | 2006 |
| LAY My HAT Travel Limited | Administrative & support | 2017 |
| Layes Wedding Stylists Ltd | Hospitality | 2024 |
| Layham Consultants Ltd | Financial services | 2020 |
| Lazar Auto Ltd | Wholesale & retail | 2020 |
| Lazarus Homes Ltd | Real estate | 2020 |
| LB Logistics Ltd | Transport & logistics | 2023 |
| LBC S&J Ltd | Wholesale & retail | 2020 |
| LBG Capital Limited | Financial services | 2024 |
| Lbrittain Ltd | Transport & logistics | 2019 |
| LC Pizza Co Limited | Professional & scientific | 2021 |
| LC Social Work Assessments Ltd | Health & social care | 2019 |
| Lccfs Ltd | Administrative & support | 2025 |
| LCM Residential Limited | Real estate | 2019 |
| Lcmc Marketing Ltd | Information & communication | 2025 |
| LD Cleaning 4U Ltd | Administrative & support | 2022 |
| LD Property Limited | Real estate | 2002 |
| LD Property Management (Ipswich) Ltd | Real estate | 2016 |
| LD8 Property Limited | Real estate | 2025 |
| LDB Kairos Consulting Limited | Professional & scientific | 2012 |
| LDG Real Estate Limited | Professional & scientific | 2021 |
| LDH (LA Doria) Limited | Wholesale & retail | 1996 |
| Ldsells Limited | Wholesale & retail | 2025 |
| LE Barre Colchester Ltd | Arts & recreation | 2022 |
| LE BAS Investment Trust Limited | Professional & scientific | 1930 |
| LE BAS Limited | Professional & scientific | 2001 |
| LE Chambers Ltd | Extraterritorial | 2021 |
| LE Detour Limited | Real estate | 1996 |
| LE Mans 88 Ltd | Wholesale & retail | 2012 |
| LEA Property Solutions Ltd | Real estate | 2014 |
| Lead Training Center Ltd | Administrative & support | 2025 |
| Leader Trans EST Ltd | Transport & logistics | 2019 |
| Leading to Excellence Ltd | Professional & scientific | 2019 |
| Leaflets Direct (Suffolk) Ltd | Administrative & support | 2011 |
| Lean Business Audio Limited | Wholesale & retail | 2003 |
| Leandro Iliya Ltd | Wholesale & retail | 2023 |
| Leap Developments Limited | Construction | 2021 |
| Leaps Suffolk Ltd | Health & social care | 2018 |
| Learmonth Technologies Limited | Information & communication | 2024 |
| Learn Play Grow (Franchise) Ltd | Professional & scientific | 2016 |
| Learnkind Ltd | Education | 2018 |
| Learntrix Digital Limited | Information & communication | 2025 |
| Leaseholder Rights Limited | Information & communication | 2023 |
| Leaseholders (Ipswich) Limited | Real estate | 1993 |
| Leaseplanners Ltd | Administrative & support | 2026 |
| Leather Feather & Bone Ltd | Wholesale & retail | 2024 |
| LEB Consultants Ltd | Professional & scientific | 2013 |
| Lebanese Shawarma Suffolk Ltd | Hospitality | 2025 |
| Leclair & Moreau Limited | Manufacturing | 2024 |
| Leclerc Lettings Ltd | Real estate | 2025 |
| Lecorre Holdings Limited | Financial services | 2022 |
| Lecure Catering Consultants Ltd | Hospitality | 2020 |
| Leda Freight Limited | Transport & logistics | 2020 |
| Ledger Business Solutions Limited | Professional & scientific | 2006 |
| Ledgernaut Ltd | Information & communication | 2025 |
| Ledj Ltd | Wholesale & retail | 2026 |
| LEE Design London Ltd | Extraterritorial | 2020 |
| LEE Morfoot (Contracts) Limited | | 1977 |
| LEE Park Residential Ltd | Real estate | 2020 |
| LEE Prentice Associates Limited | Professional & scientific | 2010 |
| LEE Valley Flyer Media Group Limited | Professional & scientific | 2026 |
| Lees Cottage Limited | Wholesale & retail | 2026 |
| Leftcore Technologies Limited | Information & communication | 2010 |
| Legacy Netball Ltd | Arts & recreation | 2017 |
| Legacy Property Ltd | Real estate | 2018 |
| Legacy Realty HQ Ltd | Real estate | 2025 |
| Legacyluxe & Associates Ltd | Hospitality | 2023 |
| Legacytrip Ltd | Transport & logistics | 2025 |
| Legal Comfort Hadleigh Limited | Administrative & support | 2017 |
| Legal Enterpraise Limited | Professional & scientific | 2025 |
| Legalo Ltd | Information & communication | 2015 |
| Leggett Straw Ltd | Agriculture & fishing | 2012 |
| Leiston Hall Management Company Limited | Professional & scientific | 2003 |