| That Tilly Rose Limited | Information & communication | 2016 |
| THC Consulting Engineers Limited | Professional & scientific | 2009 |
| THE 4 Hire Group Ltd | Administrative & support | 2024 |
| THE Amersham Local Directory Limited | Administrative & support | 2006 |
| THE Artichoke Restaurant Limited | Hospitality | 2002 |
| THE Bicma Amersham Ltd | Arts & recreation | 2024 |
| THE Biltong Shop Ltd | Manufacturing | 2016 |
| THE Board Hoard Limited | Wholesale & retail | 2015 |
| THE Booksmith Guild Ltd | Wholesale & retail | 2025 |
| THE Bristol Cemetary Company Limited | Agriculture & fishing | 2008 |
| THE CBD Medical Group Ltd | Other services | 2019 |
| THE Coaching Studio Limited | Health & social care | 2019 |
| THE Cwen Cares Limited | Wholesale & retail | 2024 |
| THE Entertainer (Amersham) Limited | Wholesale & retail | 1986 |
| THE Entertainer International Limited | Wholesale & retail | 2018 |
| THE Entertainer Limited | Extraterritorial | 2015 |
| THE Ether Ltd | Information & communication | 2024 |
| THE Experivan Collective Ltd | Administrative & support | 2026 |
| THE Fluffy Schnauzer Limited | Wholesale & retail | 2022 |
| THE Friends of Israel Gospel Ministry (UK) | Other services | 2021 |
| THE Greener Electrical Company Limited | Construction | 2013 |
| THE Guitarwrist Community Interest Company | Manufacturing | 2017 |
| THE HIT OR Miss PUB Ltd | Hospitality | 2022 |
| THE Hotel Lighting Design Company Ltd | Wholesale & retail | 2024 |
| THE Inquisitive Creative Limited | Professional & scientific | 2019 |
| THE K Consultancy (Marketing) Ltd | Professional & scientific | 2016 |
| THE Landing Development Limited | Households | 2022 |
| THE Larches (Little Chalfont) Management Company Ltd | Other services | 1998 |
| THE Lifestyle Hub Ltd | Health & social care | 2022 |
| THE Lindfield Dental Surgery Limited | Health & social care | 2009 |
| THE Little Grape Company Limited | Wholesale & retail | 2017 |
| THE London Podiatrist Ltd | Health & social care | 2023 |
| THE Lunchbowl Network Limited | Extraterritorial | 2006 |
| THE Natural Bedding Company Ltd | Manufacturing | 2017 |
| THE Natural Laundry Ltd | Wholesale & retail | 2021 |
| THE New Saracens Head Inn Ltd | Hospitality | 2022 |
| THE Old Distillery Ltd | Arts & recreation | 2025 |
| THE OLI Bennett Charitable Trust | Other services | 2002 |
| THE Paddocks (Amersham) Management Company Limited | Extraterritorial | 2010 |
| THE Padel Garden Ltd | Arts & recreation | 2024 |
| THE Padel Place Limited | Arts & recreation | 2022 |
| THE Pebble People Ltd | Real estate | 2024 |
| THE Perfect Picnic Company Ltd | Wholesale & retail | 2018 |
| THE Potters Arms (Holdings) Ltd | Real estate | 2018 |
| THE Ramana Global Limited | Wholesale & retail | 2025 |
| THE Record Shop Limited | Wholesale & retail | 2005 |
| THE Red Opera Company Limited | Administrative & support | 2008 |
| THE Research Club Limited | Professional & scientific | 2008 |
| THE RUG Room Limited | Administrative & support | 2024 |
| THE Sangaa Global Limited | Wholesale & retail | 2023 |
| THE School on the Green Limited | Education | 2003 |
| THE Shilajit Company Ltd | Wholesale & retail | 2025 |
| THE Spell Fund L.P. | | 2005 |
| THE Story Mouse (UK) Limited | Information & communication | 2011 |
| THE Sunday Escape Co Ltd | Wholesale & retail | 2025 |
| THE Thaas Global Limited | Wholesale & retail | 2025 |
| THE Trained EYE Limited | Professional & scientific | 2007 |
| THE Westbourne Collection Limited | Wholesale & retail | 2021 |
| THE Wherenow Group Ltd | Information & communication | 2026 |
| THE Woodrows (Amersham) Management Limited | Households | 2012 |
| Theodora Nortey Limited | Extraterritorial | 2024 |
| Theowcreative Limited | Information & communication | 2025 |
| Thin Air Productions Ltd | Professional & scientific | 2004 |
| Think Cool Ltd | Financial services | 2025 |
| Think! Creations Ltd | Information & communication | 2021 |
| Thinkclinic Limited | Health & social care | 2012 |
| Thinking FOX Limited | Professional & scientific | 2018 |
| Thinkivity Ltd | Information & communication | 2012 |
| THL Sustainability Ltd | Professional & scientific | 2019 |
| Thomas Property Investments Ltd | Real estate | 2017 |
| Thor Photomedicine Limited | Administrative & support | 2007 |
| Three Comma Investments Limited | Financial services | 2020 |
| Three Pagoda Limited | Professional & scientific | 2017 |
| Thuraya Investments Limited | Hospitality | 2012 |
| Thursty Lana Ltd | Hospitality | 2023 |
| Thusy Jaffnaa Bazaar Ltd | Wholesale & retail | 2025 |
| Ticky Tack Limited | Other services | 2009 |
| Tidehold Limited | Real estate | 2007 |
| Tier Company Limited | Financial services | 1993 |
| Tigerlilly Designs Limited | Professional & scientific | 2026 |
| Tijame Enterprises Ltd | Real estate | 2015 |
| Timeostat Ltd | Wholesale & retail | 2015 |
| Timmax Limited | Administrative & support | 2026 |
| Tinlin Electrical Services Limited | Construction | 2025 |
| Tintoretto Limited | Financial services | 2019 |
| Title Developments Limited | Real estate | 1994 |
| Tivis Technologies Limited | Information & communication | 2011 |
| TJ Business Solutions Ltd | Professional & scientific | 2005 |
| Tlc/Lwh Ltd | Construction | 2022 |
| TNL Services Ltd | Manufacturing | 2022 |
| Togl Limited | Other services | 2015 |
| TOM Pollard Films Limited | Information & communication | 2015 |
| TOM TOB Consulting Ltd | Other services | 2018 |
| TOM Walsh Design Ltd | Professional & scientific | 2018 |
| Tomahawk Consulting Ltd | Professional & scientific | 2024 |
| Tomkensam Limited | Manufacturing | 2022 |
| Top Notch Marquee Company Limited | Other services | 2006 |
| Topcast Aviation Europe Limited | Wholesale & retail | 2010 |
| Totteridge Associates Limited | Professional & scientific | 1991 |
| Touchwood Homes (UK) Limited | Real estate | 2013 |