| Tfio Care Services Ltd | Health & social care | 2017 |
| TFS Investments (Peterborough) Ltd | Real estate | 2023 |
| TG Styles Ltd | Other services | 2026 |
| TGA Haulage Ltd | Transport & logistics | 2015 |
| Tgae Limited | Other services | 2025 |
| TGI Holdings Ltd | Financial services | 2025 |
| Tgts Projects Limited | Information & communication | 2023 |
| TH Carpentry Services Limited | Construction | 2018 |
| TH Logistics & Transport Ltd | Transport & logistics | 2026 |
| Thalloderm Ltd | Wholesale & retail | 2023 |
| Thameen Limited | Health & social care | 2007 |
| Thames Ditton Properties Ltd | Real estate | 2023 |
| Thamsfoed Trade Ltd | Wholesale & retail | 2025 |
| Thandi's Occupational Therapy Practice Limited | Health & social care | 2022 |
| Thandicares Ltd | Health & social care | 2014 |
| Thank-Qr Ltd | Information & communication | 2026 |
| Tharagai Limited | Real estate | 2024 |
| Thatdiamondtouch Ltd | Administrative & support | 2024 |
| THE 19TH Hole Thorney Lakes Ltd | Hospitality | 2017 |
| THE 55 Group (U.K.) Ltd | Financial services | 2024 |
| THE Academic Woman C.I.C. | Education | 2022 |
| THE Academic Woman Media Ltd | Information & communication | 2025 |
| THE Accountants' Mastermind Limited | Professional & scientific | 2011 |
| THE Adam Court (Peterborough) Management Company Limited | Real estate | 1989 |
| THE Advanced Skin Cabin Limited | Other services | 2024 |
| THE Air Conditioning & Ventilation Company (Peterborough) Ltd | Energy | 2019 |
| THE Aluminium Guys Ltd | Wholesale & retail | 2022 |
| THE Anchorage Hotel Operations Limited | Hospitality | 2026 |
| THE Angel Inn Yarwell Limited | Hospitality | 2008 |
| THE Annuity Service Ltd | Financial services | 2018 |
| THE Antipodean Sommelier Limited | Wholesale & retail | 2011 |
| THE AP Partnership Limited | Professional & scientific | 1992 |
| THE Apex RTM Company Limited | Households | 2015 |
| THE Aqua Shack Ltd | Hospitality | 2023 |
| THE Aquasports Cross Trust | Arts & recreation | 1999 |
| THE ARK Market Deeping Limited | Hospitality | 2022 |
| THE ARK of KAY Ltd | Transport & logistics | 2025 |
| THE Askari Group Peterborough Ltd | Financial services | 2024 |
| THE Authentic Football Company Limited | Wholesale & retail | 1999 |
| THE Awards Organisation Limited | Other services | 2019 |
| THE AWE ERA Ltd | Manufacturing | 2025 |
| THE Banyan Tree PB Ltd | Hospitality | 2019 |
| THE Bargains Store (Online) Ltd | Wholesale & retail | 2020 |
| THE Baughan Group Ltd | Financial services | 2022 |
| THE Bcbt & Counselling Service Ltd | Health & social care | 2011 |
| THE Bean Around .COM Ltd | Wholesale & retail | 2020 |
| THE Bean Around BE. AR. Ltd | Wholesale & retail | 2019 |
| THE Bear Express BE. AR. Ltd | Hospitality | 2022 |
| THE Beauty Hub Market Deeping Ltd | Other services | 2025 |
| THE Beckwith Pantry Ltd | Hospitality | 2026 |
| THE Big Stilton Cheese CIC | Other services | 2021 |
| THE Black Club Ltd | Hospitality | 2017 |
| THE Bowlby Centre | Education | 1996 |
| THE Bowls Hub Limited | Wholesale & retail | 2026 |
| THE Brambles (Market Deeping) Residents Management Company Limited | Households | 2016 |
| THE Bread PAN Ltd | Hospitality | 2020 |
| THE Brick MAN (UK) Ltd | Wholesale & retail | 2010 |
| THE British-Hungarian Society | Public administration | 2023 |
| THE Build and Exit Ltd | Information & communication | 2023 |
| THE Business Skills Partnership Limited | Financial services | 2005 |
| THE Buttercross Enterprise Limited | Hospitality | 2025 |
| THE CAD LAB Limited | Professional & scientific | 2021 |
| THE Car Yard (Peterborough) Limited | Wholesale & retail | 2017 |
| THE Caring Company Peterborough Limited | Health & social care | 2025 |
| THE Central Groomers Ltd | Other services | 2021 |
| THE Chalkboard Afternoon Tea and Bistro Limited | Hospitality | 2019 |
| THE Chequers TD Limited | Hospitality | 2026 |
| THE Chubby Castor Limited | Professional & scientific | 2018 |
| THE Church Schools Trading Company Limited | Education | 1992 |
| THE Churchfield Stone Company Limited | Manufacturing | 2009 |
| THE Claims Service Limited | Professional & scientific | 2018 |
| THE Clean Team Construction Cleaning Specialists Limited | Administrative & support | 2006 |
| THE Clearance Van Limited | Transport & logistics | 2019 |
| THE Cloudy Studios Media Limited | Professional & scientific | 2023 |
| THE Coalheavers Arms Limited | Hospitality | 2020 |
| THE Coding Misfits Ltd | Information & communication | 2022 |
| THE Coffee Hive Peterborough Limited | Hospitality | 2020 |
| THE Coldroom Ltd | Wholesale & retail | 2018 |
| THE Collective Network Limited | Administrative & support | 2021 |
| THE Combat Doctor Ltd | Wholesale & retail | 2025 |
| THE Company of Maisters Limited | Arts & recreation | 1996 |
| THE Conception Club Limited | Wholesale & retail | 2025 |
| THE Concrete Company (Thorney) Limited | Manufacturing | 1998 |
| THE Content Creators Hub Ltd | Information & communication | 2026 |
| THE Cook's Tipple Ltd | Wholesale & retail | 2024 |
| THE Coppice (Deeping ST James) Residents Management Company Limited | Households | 2011 |
| THE Cosmos Cure Limited | Health & social care | 2025 |
| THE Cotswold Edition (Hold Co) Ltd | Real estate | 2020 |
| THE Cotswold Edition Ltd | Administrative & support | 2020 |
| THE Cottage Next Door Ltd | Wholesale & retail | 2020 |
| THE Court Pool & Snooker Club Ltd | Hospitality | 2013 |
| THE Cove Aesthetics Ltd | Other services | 2024 |
| THE CPD Centre Ltd | Education | 2025 |
| THE Creative Marketing Studio Ltd | Administrative & support | 2026 |
| THE Creativeship Ltd | Professional & scientific | 2018 |
| THE Cresset Ltd | Hospitality | 1982 |
| THE Crop Smith Ltd | Agriculture & fishing | 2020 |
| THE Culture Door CIC | Administrative & support | 2024 |
| THE Cycle Technician Ltd | Manufacturing | 2013 |
| THE Daily Blend Limited | Wholesale & retail | 2025 |