| Perna Gilbert Developments Ltd | Construction | 2013 |
| Perna Property Conveyancing Ltd | Professional & scientific | 2025 |
| Pernix Safety Management Ltd. | Professional & scientific | 2014 |
| Perrin & Keys Ltd | Hospitality | 2019 |
| Perry Development Ltd | Information & communication | 2016 |
| Perry Ives Property Management Ltd | Real estate | 2025 |
| Perseverance Properties Ltd | Real estate | 2025 |
| Persimmon Court Phase 6 (Leighton Buzzard) Management Company Limited | Households | 2014 |
| Personal Accounting Services Limited | Professional & scientific | 2019 |
| Personal Protection Training Ltd | Other services | 2024 |
| Personal Studio Ltd | Wholesale & retail | 2025 |
| Personalised Care 4U Limited | Health & social care | 2025 |
| Personally Applied Solutions Limited | Professional & scientific | 2004 |
| Personnel Resourcing Ltd | Administrative & support | 2021 |
| Perspective Intelligence Ltd | Information & communication | 2020 |
| Perudo Holdings Limited | Financial services | 2025 |
| Perudo Property Investments Limited | Real estate | 2025 |
| Perudo Realisations Limited | Administrative & support | 2013 |
| Pest Solutions Cambridgeshire Limited | Administrative & support | 2024 |
| Pest Solutions Norfolk Ltd | Administrative & support | 2026 |
| Pest Solutions Peterborough Limited | Administrative & support | 2023 |
| Pet 22 Ltd | Real estate | 2022 |
| Pet Fish Foods Ltd | Manufacturing | 2025 |
| Pet Treats Direct UK Ltd | Wholesale & retail | 2021 |
| Petals & Poise Ltd | Information & communication | 2025 |
| Petbuddies Limited | Professional & scientific | 2015 |
| Pete Bird Kitchens & Bathrooms Ltd | Construction | 2019 |
| Peter Allen Design Limited | Professional & scientific | 2011 |
| Peter Barlow Ltd | Health & social care | 2021 |
| Peter Clean Services Ltd | Administrative & support | 2024 |
| Peter Drink Ltd | Wholesale & retail | 2024 |
| Peter Food Ltd | Real estate | 2024 |
| Peter Grice Holdings Limited | Real estate | 2018 |
| Peter Grice Packaging Ltd | Transport & logistics | 2011 |
| Peter Grice Properties Ltd | Real estate | 2018 |
| Peter Peel Limited | Real estate | 2022 |
| Peter Prime Limited | Other services | 2013 |
| Peter Richards Financial Limited | Financial services | 2002 |
| Peter's Tool Shop Ltd | Manufacturing | 2023 |
| Peterborough & District Football League C.I.C. | Arts & recreation | 2009 |
| Peterborough & District Indoor Bowling Club Limited | Professional & scientific | 1959 |
| Peterborough 4D Cinema Ltd | Arts & recreation | 2015 |
| Peterborough 5 Star Taxis Ltd | Transport & logistics | 2023 |
| Peterborough Accomodation Ltd | Hospitality | 2013 |
| Peterborough Aero Club Limited | Transport & logistics | 1975 |
| Peterborough Airport Holdings Limited | Transport & logistics | 2026 |
| Peterborough ALL Stars Limited | Arts & recreation | 2026 |
| Peterborough and District Funeral Services Ltd. | Other services | 2008 |
| Peterborough Arrows Football Club Ltd | Education | 2022 |
| Peterborough Asbestos Limited | Construction | 2020 |
| Peterborough Asylum and Refugee Community Association (Parca) | Health & social care | 2013 |
| Peterborough Auto Services Limited | Wholesale & retail | 2008 |
| Peterborough Automatics Limited | Other services | 1963 |
| Peterborough Automotive Ltd | Wholesale & retail | 2026 |
| Peterborough Autos Limited | Professional & scientific | 1998 |
| Peterborough Bakery Limited | Manufacturing | 2022 |
| Peterborough Bathrooms Ltd | Wholesale & retail | 2021 |
| Peterborough Bazaar Ltd | Wholesale & retail | 2010 |
| Peterborough Bespoke Furniture Limited | Wholesale & retail | 2022 |
| Peterborough Bio-Cleans Ltd | Administrative & support | 2025 |
| Peterborough Blasting Limited | Manufacturing | 1991 |
| Peterborough Blinds & Awnings Ltd | Wholesale & retail | 2019 |
| Peterborough Blinds Ltd | Wholesale & retail | 2019 |
| Peterborough Boat Hire Ltd | Administrative & support | 2021 |
| Peterborough Body Repair Centre Ltd | Wholesale & retail | 2026 |
| Peterborough Boilers and Bathrooms Ltd | Extraterritorial | 2025 |
| Peterborough Bridge Club Limited | Arts & recreation | 1986 |
| Peterborough Business Airport Ltd | Arts & recreation | 1997 |
| Peterborough Car Care Ltd | Wholesale & retail | 2022 |
| Peterborough Car Centre Ltd | Wholesale & retail | 2020 |
| Peterborough Car Clinic Ltd | Manufacturing | 2026 |
| Peterborough Car Sale Ltd | Wholesale & retail | 2024 |
| Peterborough Care Limited | Health & social care | 1984 |
| Peterborough Cars Limited | Transport & logistics | 2012 |
| Peterborough Cathedral Holdings Limited | Wholesale & retail | 1986 |
| Peterborough Centre for Young Musicians CIC | Education | 2017 |
| Peterborough Chauffeurs Ltd | Transport & logistics | 2024 |
| Peterborough Citizens Advice Bureau | Professional & scientific | 1998 |
| Peterborough City Hotel Limited | Hospitality | 2025 |
| Peterborough City Rowing Club Limited | Arts & recreation | 2003 |
| Peterborough Classic Cars Ltd | Wholesale & retail | 2003 |
| Peterborough Clothes for Cause Limited | Water & waste | 2025 |
| Peterborough Coachworks Limited | Wholesale & retail | 2017 |
| Peterborough Community Business Awards Community Interest Company | Administrative & support | 2023 |
| Peterborough Community Radio Ltd | Information & communication | 2014 |
| Peterborough Construction Services Limited | Real estate | 1998 |
| Peterborough Council for Voluntary Service | Other services | 1987 |
| Peterborough Counselling Ltd | Health & social care | 2018 |
| Peterborough Couriers Ltd | Transport & logistics | 2011 |
| Peterborough Culture and Leisure Trust | Arts & recreation | 2010 |
| Peterborough Culture, Heritage, Learning and Leisure Ltd | Arts & recreation | 2023 |
| Peterborough Cycle Hub Ltd | Wholesale & retail | 2018 |
| Peterborough Development Management Services Limited | Real estate | 2002 |
| Peterborough Developments Ltd | Real estate | 2018 |
| Peterborough Diocesan Board of Finance(The) | Administrative & support | 1922 |
| Peterborough DIY Pound Store Plus Ltd | Wholesale & retail | 2020 |
| Peterborough Driving School Ltd | Education | 2018 |
| Peterborough Electrical Limited | Construction | 2014 |
| Peterborough Electrical Services Limited | Construction | 2012 |
| Peterborough Electricians Limited | Construction | 2010 |