| 123 Group Ltd | Administrative & support | 2022 |
| 1ST Impressions Print Ltd | Manufacturing | 2024 |
| 2 Reeds Consultancy Ltd | Professional & scientific | 2023 |
| 29 Rutland Road Limited | Real estate | 2018 |
| 3D Construction (Lincolnshire) Ltd | Construction | 2013 |
| 4TH Revolution Consulting Ltd | Professional & scientific | 2023 |
| 5 Star Barbers Skegness Ltd | Other services | 2023 |
| 5 Star GAS Services Ltd | Construction | 2016 |
| A & S Agricultural Services Ltd | Wholesale & retail | 2006 |
| A D Distribution Lincs Ltd | Transport & logistics | 2024 |
| A D V Limited | Construction | 2002 |
| A Star Storage Ltd | Transport & logistics | 2025 |
| A&E Enterprise Group Ltd | Wholesale & retail | 2017 |
| A.C.S GAS Limited | Construction | 2020 |
| A.E. Graves & SON Limited | Agriculture & fishing | 2013 |
| A.E.Hewison Limited | Wholesale & retail | 1971 |
| A52 Consulting Limited | Administrative & support | 2023 |
| Aadam Traders Limited | Wholesale & retail | 2021 |
| Accesstrader Limited | Manufacturing | 2002 |
| Aclsec Limited | Information & communication | 2018 |
| Acorn Holiday Rentals Ltd | Hospitality | 2020 |
| Adstock Estates Limited | Other services | 1992 |
| Adtrain Limited | Information & communication | 2021 |
| ADV Properties and Developments Ltd | Real estate | 2017 |
| Adyan Limited | Hospitality | 2016 |
| Afizah Properties Ltd | Real estate | 2021 |
| Aimax Properties Ltd | Construction | 2018 |
| Aitrain Ltd | Information & communication | 2025 |
| Ajcc Trading Limited | Wholesale & retail | 2016 |
| AJH Electrical Lincs Ltd | Construction | 2019 |
| Akifa's Gift House Limited | Wholesale & retail | 2024 |
| Akila Solutions Ltd | Professional & scientific | 2023 |
| Alaesthetics Beauty Ltd | Health & social care | 2023 |
| Alexander Finance Limited | Financial services | 1972 |
| Alexanders Distribution Limited | Real estate | 2015 |
| Algoclear Limited | Administrative & support | 2022 |
| Alice’S Hatter Ltd | Hospitality | 2020 |
| All-Terrain Automotive Limited | Wholesale & retail | 2017 |
| Allan House Associates Ltd | Real estate | 2025 |
| Allen Lowes Ltd | Construction | 2007 |
| Alpha Memorials Ltd | Other services | 2015 |
| Aman Mobile Phones & Accessories Ltd | Wholesale & retail | 2018 |
| Amazon Services Investments Ltd | Professional & scientific | 2012 |
| Amazon Services.Com Limited | Wholesale & retail | 2000 |
| Ambassador Discount Plastics Limited | Construction | 2021 |
| Ambassador Taxis (Skegness) Limited | Transport & logistics | 2020 |
| AMJ Commodities Ltd | Wholesale & retail | 2016 |
| Ampert Ltd | Professional & scientific | 2015 |
| Amvida Investments Ltd | Financial services | 2016 |
| Ancaster Avenue (Chapel ST Leonards) Residents` Company Limited | Households | 2007 |
| Angel Care Skegness Limited | Health & social care | 2022 |
| Anna's BAG Boutique Limited | Wholesale & retail | 2025 |
| ANP Skegness Ltd | Wholesale & retail | 2024 |
| Anwick House Management Company Limited | Real estate | 2022 |
| Anxiety Solutions Ltd | Health & social care | 2018 |
| Anybook Limited | Wholesale & retail | 1999 |
| Apollo Energy Performance Consultancy Ltd | Construction | 2024 |
| Aquadesign Products Ltd | Wholesale & retail | 2025 |
| Aquazero Limited | Manufacturing | 2013 |
| AR Carpentry Lincs Ltd | Construction | 2025 |
| Arcadia Antiques Limited | Wholesale & retail | 2016 |
| Arcp Developments Limited | Construction | 2023 |
| ARK Arborists Ltd | Agriculture & fishing | 2019 |
| Arkenova Builders Ltd | Construction | 2026 |
| Arlos Cars Ltd | Transport & logistics | 2019 |
| Arnold's Catering Limited | Hospitality | 2020 |
| Art & Music Corporation Limited | Extraterritorial | 1984 |
| Aryan Enterprises Skegness Ltd | Wholesale & retail | 2018 |
| Ashley Properties and Services Limited | Real estate | 2026 |
| ASR (Skeg) Limited | Wholesale & retail | 2023 |
| Assetto Motorsport Limited | Wholesale & retail | 2017 |
| Atkin & Farrow Limited | Agriculture & fishing | 1958 |
| Atlas Events & Production Ltd | Other services | 2023 |
| Atomally Landscapes Ltd | Administrative & support | 2015 |
| Avill Wholesale Services Limited | Wholesale & retail | 2025 |
| Avneet Toys Retails Limited | Wholesale & retail | 2018 |
| Awesome Walrus Ltd | Manufacturing | 2024 |
| B & B Wristbands Limited | Administrative & support | 2014 |
| B Bronze Tanning Studio Ltd | Other services | 2026 |
| B Finney & Sons Contracting & Agriculture Ltd | Agriculture & fishing | 2025 |
| B Swift Property Ltd | Real estate | 2018 |
| B V Platt Limited | Health & social care | 2026 |
| B&L Enterprises (Lincs) Ltd | Wholesale & retail | 2026 |
| Banham Hall Limited | Construction | 2021 |
| Banjos.Net Solutions Ltd | Wholesale & retail | 2023 |
| Barham Caravan Company Limited | Hospitality | 1956 |
| Barlings Holdings Ltd | Financial services | 2018 |
| Barlings Park Ltd | Hospitality | 2018 |
| Barn Retreat Leisure Ltd | Hospitality | 2021 |
| Baxter & Trigs Ltd | Administrative & support | 2022 |
| Beachsand Limited | Hospitality | 1998 |
| Beachsand Properties Limited | Real estate | 2006 |
| Beachside Caravan Park (Lincs) Ltd | Hospitality | 2013 |
| Beam Mortgage Services Ltd | Financial services | 2023 |
| Beans Pet Co Ltd | Wholesale & retail | 2025 |
| Beauty Outlet Limited | Wholesale & retail | 2014 |
| Beclean Solutions Commercial Ltd | Administrative & support | 2024 |
| Bedford's Fruit & VEG Limited | Wholesale & retail | 2004 |
| Belgrade Management Ltd | Construction | 2025 |
| Bell Electrical (Lincs) Limited | Construction | 2024 |