| Roosevelt & Partners (NZ) Limited | | 2023 |
| Rose & Thorn Property Services Ltd | Real estate | 2020 |
| Rose Vale Rural Limited | Professional & scientific | 2026 |
| Rosie’S Housekeeping Limited | Administrative & support | 2022 |
| Rotor Pixel Technologies Ltd | Information & communication | 2022 |
| Roward Ltd | Wholesale & retail | 2016 |
| Rowland Homes (Wellington) Limited | Construction | 2015 |
| Rpgb Properties Ltd | Real estate | 2023 |
| Rpmotorworks Ltd | Wholesale & retail | 2023 |
| RT Aggregate Ltd | Construction | 2019 |
| RT Farm & Industrial Buildings Limited | Construction | 2009 |
| RT Farms Industrial Buildings and Construction Limited | Construction | 2025 |
| Rugeronis UK Ltd. | Manufacturing | 2016 |
| Rumwell Hall Solutions Ltd | Extraterritorial | 2012 |
| Runnington Properties Ltd | Other services | 2020 |
| Runtime (UK) Ltd | Information & communication | 1998 |
| Ruxstons Ltd | Wholesale & retail | 2019 |
| Ryelands Business Park Limited | Real estate | 1978 |
| Rymack Holdings Limited | Financial services | 2024 |
| S. Tenev Consultancy Ltd | Construction | 2019 |
| S.M. & D.M. Turner Limited | Agriculture & fishing | 2004 |
| S.W.1 Limited | Professional & scientific | 1991 |
| SAD Solutions Limited | Manufacturing | 2024 |
| Safety Training Southwest Ltd | Professional & scientific | 2012 |
| Saffron Property Holdings LLP | | 2025 |
| Sales Skill Limited | Professional & scientific | 2007 |
| Salop Sand & Gravel Supply Company Limited | Mining & quarrying | 1961 |
| Saltmoor Property Management Ltd | Hospitality | 2025 |
| SAM Cowling Fabrication Ltd | Construction | 2018 |
| Sarwat Sadek Limited | Health & social care | 2012 |
| Sasp Social Enterprises Limited | Extraterritorial | 2014 |
| SCF Assets LLP | | 2025 |
| SCF Fabrication Ltd | Agriculture & fishing | 2017 |
| Scholarport Ltd | Education | 2025 |
| Scott Trade Limited | Wholesale & retail | 2022 |
| Sculpted Infrastructure Services Limited | Information & communication | 2021 |
| Sculpting Sounds Ltd | Wholesale & retail | 2022 |
| Scutum West Limited | Administrative & support | 1996 |
| Seahorse Psychotherapies LLP | | 2025 |
| Seals and Mounts Limited | Wholesale & retail | 2000 |
| Secret Abundance Trading Limited | Administrative & support | 2017 |
| Sedgemoor Auto Services Ltd | Transport & logistics | 2025 |
| SEE Financial Services Limited | Financial services | 2002 |
| Selgars Imagineering Ltd | Agriculture & fishing | 2021 |
| Senatic Holdings Ltd | Financial services | 2021 |
| Senatic SPV1 Limited | Extraterritorial | 2023 |
| Senatic SPV3 Limited | Extraterritorial | 2023 |
| Serellen Ltd | Hospitality | 2024 |
| Seroxol Limited | Health & social care | 2025 |
| SFR Airsoft Ltd | Arts & recreation | 2026 |
| SG Modular UK Limited | Construction | 2017 |
| SG Training & Consultancy Ltd | Professional & scientific | 2021 |
| SGW Research Limited | Wholesale & retail | 2002 |
| Shantinah Limited | Health & social care | 2020 |
| Shared Stories Ltd | Professional & scientific | 2014 |
| Sheps-Tech Ltd | Professional & scientific | 2015 |
| Shetland Nominees Limited | | 2023 |
| Shgas Ltd | Manufacturing | 2025 |
| Shield IT Solutions Limited | Information & communication | 2009 |
| SHJ Holdings Ltd | Financial services | 2026 |
| Shop Lane ND Limited | Wholesale & retail | 2026 |
| Siaca Ltd | Administrative & support | 2018 |
| Simon Bellamy Carpentry Limited | Construction | 2014 |
| Simon Willey Master Thatcher Ltd | Construction | 2025 |
| Simply Germazing Ltd | Hospitality | 2018 |
| Sinani Hand Car Wash Ltd | Administrative & support | 2017 |
| Sirius Business Consultancy and Services Limited | Professional & scientific | 2022 |
| Sirus Microtech Limited | Wholesale & retail | 1985 |
| SIX Squirrels Property Management Limited | Real estate | 2025 |
| SJ Accounting (Wellington) Ltd | Professional & scientific | 2025 |
| SJ Management Consultants Ltd | Professional & scientific | 2024 |
| SJB Commercial Limited | Real estate | 2020 |
| SJB Inc Ltd | Real estate | 2023 |
| Sl&V Ltd | Professional & scientific | 2022 |
| Smith & Loveless Limited | Wholesale & retail | 2013 |
| Smith-Tech International Ltd | Administrative & support | 2021 |
| Snappy Sups Ltd | Arts & recreation | 2023 |
| Snowboarder Limited | Real estate | 2026 |
| Solar Breeze Renewables Ltd | Construction | 2024 |
| Solway Limited | Households | 1998 |
| Somercourt Group Limited | Extraterritorial | 2000 |
| Somercourt Limited | Wholesale & retail | 1993 |
| Somerdale International Limited | Wholesale & retail | 1990 |
| Somerscreens Limited | Information & communication | 2025 |
| Somerset Activity and Sports Partnership | Education | 2006 |
| Somerset Cleaning Services Ltd | Administrative & support | 2025 |
| Somerset Escargot LLP | | 2019 |
| Somerset Facades Ltd | Construction | 2022 |
| Somerset Hearing Ltd | Health & social care | 2021 |
| Somerset Panel Centre Limited | Manufacturing | 2004 |
| Somerset Stairlifts Ltd | Wholesale & retail | 2015 |
| Somerset Woodshavings Limited | Wholesale & retail | 2017 |
| Somtech Limited | Real estate | 2004 |
| South London Portfolio Limited | Real estate | 2013 |
| South West Computer Recycling Limited | Water & waste | 2014 |
| Southerton Properties Ltd | Real estate | 2025 |
| Southwest Consult Ltd | Construction | 2018 |
| Southwest Neurovascular Ltd | Health & social care | 2024 |
| Southwest Rental Ltd | Real estate | 2025 |
| Spartan Chamber Holdings Limited | Real estate | 2024 |