| THE King's (the Cathedral) School, Peterborough | Education | 2010 |
| THE Ladz (Peterborough) Ltd | Hospitality | 2021 |
| THE Ladz Limited | Wholesale & retail | 2019 |
| THE Lakes Business Park Property Management Company Limited | Real estate | 2015 |
| THE Land POT Ltd | Real estate | 2019 |
| THE Landbased Engineering Training and Education Committee Limited | Education | 2017 |
| THE Landlord Hub Limited | Administrative & support | 2016 |
| THE Lawns Thorpe Road MAN Co Ltd | Real estate | 2018 |
| THE Lazy Mare Limited | Hospitality | 2024 |
| THE Lead Engine Limited | Information & communication | 2017 |
| THE Leafscape Ltd | Construction | 2021 |
| THE Lean Group Limited | Professional & scientific | 2004 |
| THE Learned Society of Mckenzie Friends Limited | Other services | 2023 |
| THE Learning Tree Kindergarten Holdings Limited | Financial services | 2021 |
| THE Legal Baker Ltd | Hospitality | 2026 |
| THE Lemon Tree of Oundle Ltd | Hospitality | 2023 |
| THE Leofric Square Management Company Limited | Real estate | 1989 |
| THE Leprosy Mission Great Britain | Other services | 1995 |
| THE Letters Group Limited | Other services | 2017 |
| THE Lettings Hub Limited | Information & communication | 2013 |
| THE Lettings POD Limited | Real estate | 2019 |
| THE Lettings Shop Peterborough Ltd | Real estate | 2014 |
| THE Limes (Castor) Management Co. Limited | Real estate | 2016 |
| THE Little Dutch Development Company Ltd | Real estate | 2013 |
| THE Little Hair Shop (Whittlesey) Ltd | Other services | 2025 |
| THE Little Land Company (Oundle) Ltd | Construction | 2020 |
| THE Little Marketing Company Peterborough Ltd | Professional & scientific | 2020 |
| THE Little Sensory Box Ltd | Wholesale & retail | 2023 |
| THE Local View Ltd | Manufacturing | 2020 |
| THE Lounge at Wansford Ltd | Hospitality | 2023 |
| THE Loving Legacies Foundation CIC | Professional & scientific | 2025 |
| THE Luxe Look Ltd | Wholesale & retail | 2023 |
| THE Luxury Stationery Company Ltd | Manufacturing | 2024 |
| THE MAD Turk (Fenland) Ltd | Hospitality | 2025 |
| THE Maintenance Shed Limited | Manufacturing | 2020 |
| THE Manufacturers of IBA Aggregates Association Limited | Other services | 2016 |
| THE Maple Grove Company Cambs Ltd | Real estate | 2020 |
| THE Market's Butcher Ltd | Wholesale & retail | 2024 |
| THE Meadows Langworth Management Company Limited | Households | 2019 |
| THE Meadows Residential Management Company Limited | Households | 2007 |
| THE Measuring Stick Ltd | Information & communication | 2023 |
| THE Memorial Craftsman Ltd | Manufacturing | 2017 |
| THE Merchants of Crowland and Thorney Limited | Wholesale & retail | 2015 |
| THE Milk Booster Ltd | Manufacturing | 2019 |
| THE Mill Development Amenity Company Limited | Households | 1997 |
| THE Mind Factory Entertainment Limited | Arts & recreation | 2021 |
| THE Mirrorflex Company Limited | Manufacturing | 2008 |
| THE Mobility Aids Centre Limited | Wholesale & retail | 2006 |
| THE Money Service Ltd | Financial services | 2019 |
| THE Moorings (Deeping) Management Company Limited | Households | 2008 |
| THE Moorings (Hampton Hargate) Management Company Limited | Households | 2002 |
| THE Mortgage Minder Limited | Financial services | 2022 |
| THE Mortgage Service Ltd | Financial services | 2018 |
| THE Motion Group Limited | Wholesale & retail | 2026 |
| THE Motorcycle Works Limited | Wholesale & retail | 2012 |
| THE Muffin Oven Limited | Manufacturing | 2004 |
| THE Muslim Khoja Shia Ithna-Asheri Community of Peterborough Trust Corporation | Other services | 2013 |
| THE Mustard Seed Project (Kenya) | Education | 2008 |
| THE Nail LAB Peterborough Ltd | Other services | 2024 |
| THE National Association of Professional Ambulance Services | Other services | 2012 |
| THE National Flooring Company Limited | Construction | 1995 |
| THE Natural Smoothie Co Limited | Wholesale & retail | 2024 |
| THE Nest Network Ltd | Administrative & support | 2025 |
| THE Nest Spa & Beauty Therapies Ltd | Other services | 2020 |
| THE Northants Barber Ltd | Other services | 2023 |
| THE Oaks (Norwich) Management Company Limited | Households | 2022 |
| THE Oculist Limited | Health & social care | 2007 |
| THE Office Peterborough Limited | Financial services | 2015 |
| THE Oikos Store Ltd | Extraterritorial | 2021 |
| THE OIL Tank Company Limited | Manufacturing | 2003 |
| THE Old Builders Yard Stamford Ltd | Households | 2011 |
| THE Old Chapel Limited | Hospitality | 2022 |
| THE Old Grain House Management Company Limited | Households | 2010 |
| THE Old Granary (Lincs) Limited | Real estate | 2023 |
| THE Old Mill Residents Association (ST. Ives) Limited | Households | 1997 |
| THE Old Paper Shop Limited | Hospitality | 2017 |
| THE Oliver Twist (Guyhirn) Limited | Hospitality | 2011 |
| THE OM Company Cambs Ltd | Real estate | 2020 |
| THE One Booth Co. Ltd | Professional & scientific | 2023 |
| THE One Group (Technical) Limited | Administrative & support | 2010 |
| THE One Group Ltd | Administrative & support | 2004 |
| THE OPS Engine Limited | Information & communication | 2026 |
| THE OPS Haven Ltd | Wholesale & retail | 2025 |
| THE Orchard (Lewes Gardens) Management Company Limited | Households | 1994 |
| THE Orchard at Langport Management Company Limited | Households | 2021 |
| THE Orchards (Corby Glen) Residents Management Company Limited | Households | 2022 |
| THE Packaging Shop Limited | Manufacturing | 1992 |
| THE Painted Path Therapeutic Services Ltd | Health & social care | 2023 |
| THE Pantry Shack Limited | Hospitality | 2025 |
| THE Parigan Property Company Limited | Real estate | 2010 |
| THE Pasta Shop Limited | Wholesale & retail | 2009 |
| THE Pathfinder Flying Club Ltd | Arts & recreation | 1997 |
| THE Pavilion - Dosa & Deli Ltd | Hospitality | 2020 |
| THE Paving Company Gilgan Ltd | Construction | 2021 |
| THE PAW & Tail Company Limited | Wholesale & retail | 2018 |
| THE Payroll Providers Limited | Administrative & support | 2007 |
| THE Personal Gardening Service Limited | Administrative & support | 2021 |
| THE Pet Supply DEN Ltd | Wholesale & retail | 2025 |
| THE Peterborough Biscuit Ltd | Administrative & support | 2021 |
| THE Peterborough Cancer Treatment Appeal | Health & social care | 2004 |