| Ryder Academi CIC | Arts & recreation | 2021 |
| Sadie Daisy Beauty Ltd | Other services | 2022 |
| Sadie Daisy Ltd | Other services | 2023 |
| Scilicorns Bakery Ltd | Wholesale & retail | 2023 |
| Shepherd's Biscuits Ltd | Manufacturing | 2014 |
| Shone Hughes Ltd | Wholesale & retail | 2022 |
| Sian Roberts Limited | Professional & scientific | 2015 |
| Siwgr a Sbeis CYF | Manufacturing | 2003 |
| SJH Farming Ltd | Agriculture & fishing | 2024 |
| Snowdonia Business Park Limited | Construction | 2016 |
| Snowdonia Electrical Ltd | Manufacturing | 2019 |
| Snowdonia Interiors Ltd | Wholesale & retail | 2012 |
| Snowdonia Plumbing & Heating Services Ltd | Construction | 2009 |
| Snowdonia Spaces Ltd | Real estate | 2025 |
| SNR Healthcare Limited | Wholesale & retail | 2020 |
| Source Yoga Limited | Other services | 2018 |
| Span 11 Ltd | Construction | 2023 |
| SPD Factory Developments Ltd | Manufacturing | 2023 |
| Spice Investment Ltd | Wholesale & retail | 2026 |
| Stour Provost Limited | Hospitality | 2007 |
| Strugar Transport Ltd | Transport & logistics | 2018 |
| STS (North Wales) Limited | Wholesale & retail | 2006 |
| Sun of a Beach Ltd | Other services | 2019 |
| SW Taylor Holdings Limited | Arts & recreation | 2024 |
| TAI FON CYF | Real estate | 2024 |
| TC Farms Ltd | Agriculture & fishing | 2026 |
| Teal Outdoors Limited | Administrative & support | 2016 |
| THE Eagles Hotel Llanrwst Limited | Hospitality | 2015 |
| THE Haggard Vine Consultancy Ltd | Professional & scientific | 2021 |
| THE Lions BJJ Ltd | Education | 2025 |
| THE Maddox Food Company Limited | Manufacturing | 2015 |
| THE Natural Building Centre Ltd | Construction | 2010 |
| THE Old Tannery Llanrwst Limited | Hospitality | 2016 |
| THE Ulia Group Ltd | Professional & scientific | 2022 |
| Thomas-Holmes Ltd | Hospitality | 2019 |
| Tirio CYF | Administrative & support | 2016 |
| Traed Bach CYF. | Other services | 1998 |
| Trcreatures Ltd | Arts & recreation | 2023 |
| Treetop Trek Limited | Arts & recreation | 2009 |
| Trestl Ltd | Hospitality | 2026 |
| Tribells Llandudno Limited | Hospitality | 2018 |
| Tsunami Family Hairdressers Limited | Other services | 2003 |
| TTA Construction Services Ltd | Construction | 2022 |
| Turner Project Solutions Wales Ltd | Construction | 2021 |
| TY Gwyn Spaces Ltd | Real estate | 2025 |
| Valais Blacknose UK Ltd | Agriculture & fishing | 2022 |
| Vale Value Limited | Wholesale & retail | 2013 |
| W a M Davies CYF | Construction | 2011 |
| W56 Limited | Transport & logistics | 2023 |
| White Rose Ceremonies Ltd | Other services | 2016 |
| Willow Tree Glamping Ltd | Hospitality | 2024 |
| Working Frequency Ltd | Information & communication | 2020 |
| WRC Scaffolding Solutions Ltd | Construction | 2026 |
| WTW - Fire, Security & Home Automation Ltd | Administrative & support | 2024 |
| WTW Electrical Ltd | Construction | 2024 |
| ZIP World Fforest Ltd | Arts & recreation | 2006 |
| ZIP World Group Holdings Limited | Arts & recreation | 2017 |
| ZIP World Limited | Arts & recreation | 2011 |
| ZIP World RAK Limited | Extraterritorial | 2017 |
| Zwpv Limited | Arts & recreation | 2018 |