| Severus Holdings Ltd | Real estate | 2019 |
| Shortroad Management Company Limited | Hospitality | 1993 |
| Soji Limited | Information & communication | 2003 |
| Springburn Spirits Co. Ltd | Manufacturing | 2024 |
| Sturdee Poultry Farms Holdings Limited | Financial services | 2025 |
| Tctp Ltd | Wholesale & retail | 2022 |
| Team Hawk Racing Limited | Arts & recreation | 2013 |
| THE 8A Limited Liability Partnership | | 2023 |
| THE Aldeburgh Cinema (Property) Limited | Real estate | 1965 |
| THE Aldeburgh Library Foundation | Arts & recreation | 2012 |
| THE Aldeburgh Market Ltd | Wholesale & retail | 2006 |
| THE Bonny Boys Limited | Information & communication | 2007 |
| THE Cygnets Residents Management Company Limited | Households | 2007 |
| THE Glass House Limited | Wholesale & retail | 1996 |
| THE Suffolk SUR MER Limited | Hospitality | 2020 |
| Thermonovel Limited | Construction | 1996 |
| Thermonovel Rosswood Ltd | Real estate | 2023 |
| Thompson's Gallery Aldeburgh Ltd | Wholesale & retail | 2018 |
| Tomorrow IS Open Ltd | Professional & scientific | 2020 |
| Truck Industry Research Ltd | Professional & scientific | 2014 |
| Uplands Management Limited | Real estate | 2007 |
| Valley Gardens (Leiston) Management Company Limited | Households | 2020 |
| Victoria Sebag Art Ltd | Construction | 2026 |
| Villa Papillon Antigua Limited | Real estate | 2023 |
| Virtuad Limited | Professional & scientific | 1999 |
| Wencorp Limited | Information & communication | 2025 |
| Wentworth Hotel Holdings Ltd | Financial services | 2020 |
| Wentworth Hotel Investments Ltd | Financial services | 2020 |
| Wentworth Investments Holdings Limited | Financial services | 2022 |
| Wightman Fishing Co Limited | Agriculture & fishing | 2011 |