| RG Strategy Ltd | Real estate | 2020 |
| Rgjs Holdings Limited | Real estate | 2017 |
| RGL Carpets and Flooring Ltd | Wholesale & retail | 2025 |
| RH Mobile Hub Ltd | Wholesale & retail | 2026 |
| Richard Steadman Services Limited | Construction | 2024 |
| Richmond Rental Properties Ltd | Real estate | 2023 |
| RJ & RL Hall Limited | Hospitality | 2000 |
| RJR Group (ENG) Limited | Agriculture & fishing | 2020 |
| Rnkc Limited | Wholesale & retail | 2018 |
| ROB & JAC of ALL Trades Limited | Construction | 2021 |
| Robert Edge Limited | Hospitality | 1978 |
| Robin Hood Caravan Camp(Lincs)Limited | Extraterritorial | 1962 |
| Robins View Homes Ltd | Real estate | 2024 |
| Rodeo Limited | Wholesale & retail | 2000 |
| Roger Barnes Tyres Ltd | Wholesale & retail | 2021 |
| Rolling Spirit Holdings Limited | Financial services | 2025 |
| Rolling Spirit Limited | Arts & recreation | 2023 |
| Roman Street Sweet Dreams Ltd | Hospitality | 2024 |
| Roman TAN and Beauty Ltd | Other services | 2026 |
| Rondor-Kc Limited | Wholesale & retail | 2019 |
| Rosco Shellfish Limited | Hospitality | 2021 |
| Rotherwood and Greenbanks Ltd. | Arts & recreation | 2010 |
| Rowan Deniz (Fried Chicken) Ltd | Hospitality | 2026 |
| Rowan Tree House Limited | Extraterritorial | 2025 |
| ROY Wilkinson Engineering Limited | Construction | 2018 |
| Royston Heath Fitness Limited | Arts & recreation | 2023 |
| RPS Physiotherapy Limited | Health & social care | 2019 |
| RS Properties Lincs Ltd | Real estate | 2025 |
| RT Autos Bodyshop Ltd | Wholesale & retail | 2022 |
| Rutland Apartments Management Limited | Households | 2017 |
| S & H Dentcare Ltd | Health & social care | 2024 |
| S S P Hats Limited | Wholesale & retail | 2002 |
| Sadler's Leisure Limited | Wholesale & retail | 2023 |
| Safehaven Studios Limited | Arts & recreation | 2022 |
| Safer Homes Security Ltd | Administrative & support | 2026 |
| Salamastras Ltd | Other services | 2014 |
| Salts Fish & Chip Shop Limited | Hospitality | 2010 |
| Sandeep Enterprises Ltd | Wholesale & retail | 2025 |
| Sanders & Co Properties Ltd | Real estate | 2026 |
| Sanders and SON Properties Ltd | Real estate | 2025 |
| Sanders Property Group LLP | | 2026 |
| Sandwich Labelling Solutions Limited | Extraterritorial | 1992 |
| Sapphire Bookkeeping Services Ltd | Administrative & support | 2020 |
| Sartoria Limited | Transport & logistics | 2023 |
| Saucy Bears Limited | Wholesale & retail | 2006 |
| Savoury & RYE Limited | Wholesale & retail | 2023 |
| Sayer & Sons (Skegness Jewellers) Limited | Wholesale & retail | 1947 |
| SBL Care Ltd | Health & social care | 2014 |
| Scis UK Limited | Information & communication | 2002 |
| Scotts (Lincs) Jewellers Limited | Wholesale & retail | 1964 |
| Scrimshaw Builders Ltd | Construction | 2013 |
| Sea Chef (YE) Limited | Hospitality | 2022 |
| Seacoast Trading Limited | Wholesale & retail | 2022 |
| Seacroft Golf Club Limited | Arts & recreation | 2019 |
| Seacroft Investments 2022 Limited | Real estate | 2022 |
| Seacroft Mobility Limited | Wholesale & retail | 2010 |
| Seacroft Property Ltd | Real estate | 2020 |
| Seafront Kiosks Ltd | Hospitality | 2021 |
| Seagull (Recycling) Limited | Water & waste | 1996 |
| Seaside Greyhound Kennels CIC | Other services | 2020 |
| Seaside Leisure Holdings Limited | Financial services | 2015 |
| Seaside Leisure Parks Limited | Hospitality | 1978 |
| Seaside Storage Ltd | Transport & logistics | 2025 |
| Sell the Caravan Limited | Real estate | 2020 |
| Sener Limited | Hospitality | 2021 |
| Severn C Products Limited | Wholesale & retail | 2014 |
| Sevrax Limited | Agriculture & fishing | 2026 |
| Seymour Numbers Ltd | Financial services | 2022 |
| Seymours Caravan Sales Limited | Hospitality | 1987 |
| Seymours Caravans Limited | Hospitality | 2026 |
| Seymours Parks Limited | Hospitality | 2005 |
| SFC Take Away Limited | Hospitality | 2025 |
| Shanghai Chinese Food Takeaway Limited | Hospitality | 2024 |
| Shape and Shine Limited | Other services | 2017 |
| Shawland Properties Ltd | Real estate | 2024 |
| Shelley & Brown Construction Support Services Limited | Construction | 2025 |
| Shirecliffe Ltd | Administrative & support | 2024 |
| Shoes Corner.Com Limited | Wholesale & retail | 2024 |
| Shootoff Store UK Ltd | Wholesale & retail | 2020 |
| Shrp Physiotherapy Ltd | Health & social care | 2025 |
| SID Dennis and Sons Limited | Water & waste | 2002 |
| SID Invest Ltd | Real estate | 2025 |
| Sidestream Limited | Professional & scientific | 2022 |
| Sierra Catering Ltd | Hospitality | 2020 |
| Signal International Limited | Manufacturing | 1998 |
| Silveno Ltd | Real estate | 2025 |
| Simmons of Elstead Ltd | Transport & logistics | 2005 |
| Simon Barker Holdings Limited | Administrative & support | 2016 |
| Simplicity of Nature Limited | Wholesale & retail | 2020 |
| Simply Heating (Lincoln) Limited | Manufacturing | 2007 |
| Simpson Management Ltd | Hospitality | 2026 |
| Sinarchie Media Ltd | Information & communication | 2025 |
| Sinfield Power Services Ltd | Construction | 2019 |
| Sing and Perform Limited | Arts & recreation | 2017 |
| Sjbp Glamping Ltd | Hospitality | 2021 |
| Skaife Farm Services Ltd | Agriculture & fishing | 2021 |
| Skeg Grain Limited | Other services | 1982 |
| Skeggy Gift Company Limited | Wholesale & retail | 2013 |
| Skeggy Spirits Ltd | Wholesale & retail | 2026 |
| Skegness Autos Limited | Wholesale & retail | 2017 |