| Peterborough Emergency Medicine Courses CIC | Education | 2019 |
| Peterborough Engineering Limited | Manufacturing | 2022 |
| Peterborough Engraving & City Signs Limited | Administrative & support | 1988 |
| Peterborough Environment City Trust | Education | 1993 |
| Peterborough Event Solutions & Guarding Services Limited | Extraterritorial | 2014 |
| Peterborough Event Zone Limited | Arts & recreation | 2026 |
| Peterborough Films Ltd | Information & communication | 2018 |
| Peterborough Finishing & Mailing Services Limited | Other services | 2006 |
| Peterborough Fire Alarm & Security Systems Limited | Construction | 2023 |
| Peterborough Fire Alarm Services Limited | Public administration | 2019 |
| Peterborough Flooring (Holdings) Limited | Professional & scientific | 2004 |
| Peterborough Flooring Solutions Ltd | Construction | 2017 |
| Peterborough Flooring Supplies Limited | Wholesale & retail | 1997 |
| Peterborough Flying School Limited | Professional & scientific | 2012 |
| Peterborough Food Corner Ltd | Hospitality | 2024 |
| Peterborough Football and Sports Development Foundation | Arts & recreation | 2015 |
| Peterborough Freestyle Kickboxing Academy Limited | Education | 2021 |
| Peterborough Fruit & VEG Ltd | Wholesale & retail | 2013 |
| Peterborough Funeral Services Ltd | Other services | 2011 |
| Peterborough GAS Limited | Construction | 2016 |
| Peterborough Green Energy Ltd | Water & waste | 2015 |
| Peterborough Gymnastics Academy Ltd | Arts & recreation | 2014 |
| Peterborough Hair & Cosmetics Ltd | Other services | 2024 |
| Peterborough Hair Salon Limited | Other services | 1998 |
| Peterborough Health and Wellness Ltd | Health & social care | 2017 |
| Peterborough Heating Solutions Ltd | Construction | 2015 |
| Peterborough Homecare Limited | Health & social care | 2021 |
| Peterborough Hot Tubs Limited | Wholesale & retail | 2018 |
| Peterborough in Conversation C.I.C. | Education | 2019 |
| Peterborough International Christian Centre | Other services | 2012 |
| Peterborough Italian Social Club Limited | Hospitality | 1986 |
| Peterborough Jewellery & Collectables Ltd | Wholesale & retail | 2025 |
| Peterborough Judo Club Ltd | Education | 2025 |
| Peterborough Judo Ltd | Other services | 2018 |
| Peterborough Kaspas Limited | Hospitality | 2016 |
| Peterborough Landscaping Limited | Extraterritorial | 1979 |
| Peterborough Laundry & Linen Hire Services Ltd | Other services | 2018 |
| Peterborough Limited | Water & waste | 2018 |
| Peterborough Lions FC CIC | Education | 2025 |
| Peterborough Lions Leisure Community Interest Company | Manufacturing | 2013 |
| Peterborough Lions Limited | Administrative & support | 2003 |
| Peterborough Lions Rugby Club CIC | Arts & recreation | 2022 |
| Peterborough Masonic Hall Limited | Arts & recreation | 1962 |
| Peterborough Mobile Tyre Ltd | Wholesale & retail | 2022 |
| Peterborough MOT & Service Station Ltd | Wholesale & retail | 2023 |
| Peterborough Motor Club Limited | Administrative & support | 1951 |
| Peterborough Motor Repairs Ltd | Wholesale & retail | 2024 |
| Peterborough Motor Sales Ltd | Wholesale & retail | 2018 |
| Peterborough Muslim Education Trust | Education | 2009 |
| Peterborough One Ltd | Hospitality | 2022 |
| Peterborough Panda Marketing Ltd | Professional & scientific | 2021 |
| Peterborough Panels Limited | Construction | 2019 |
| Peterborough Parts Warehouse Ltd | Wholesale & retail | 2026 |
| Peterborough Performing Arts Ltd | Arts & recreation | 2025 |
| Peterborough Pest Control Service Ltd | Administrative & support | 2015 |
| Peterborough Pipe Services Ltd | Construction | 2019 |
| Peterborough Pipework Services Limited | Construction | 2014 |
| Peterborough Pizza Ltd | Hospitality | 2025 |
| Peterborough Plumbers Ltd | Construction | 2026 |
| Peterborough Plus Vcse Consortium Ltd | Administrative & support | 2014 |
| Peterborough Positive Limited | Other services | 2020 |
| Peterborough Prime | Education | 2022 |
| Peterborough Printing Services Limited | Manufacturing | 1975 |
| Peterborough Private Hire Limited | Transport & logistics | 2016 |
| Peterborough Productions Limited | Arts & recreation | 2024 |
| Peterborough Property Group Limited | Households | 2026 |
| Peterborough Property Investments Ltd | Real estate | 2017 |
| Peterborough Property Maintenance Limited | Construction | 2019 |
| Peterborough Property Portfolio Limited | Real estate | 2016 |
| Peterborough Property Specialists Ltd | Construction | 2025 |
| Peterborough PUB Company Ltd | Hospitality | 2023 |
| Peterborough Recliner Centre Ltd | Wholesale & retail | 2011 |
| Peterborough Renewable Energy Limited | Professional & scientific | 2002 |
| Peterborough Residential Development Limited | Real estate | 2020 |
| Peterborough Roller Hockey Club Limited | Arts & recreation | 2025 |
| Peterborough Sailability Limited | Arts & recreation | 2006 |
| Peterborough Scaffolding Limited | Construction | 2013 |
| Peterborough Science & Technology Park Limited | Construction | 2022 |
| Peterborough Sheet Metal Limited | Manufacturing | 1984 |
| Peterborough Skip Hire Ltd | Water & waste | 2022 |
| Peterborough Smart Cars Limited | Transport & logistics | 2023 |
| Peterborough Smile Ltd | Health & social care | 2012 |
| Peterborough Society of Model Engineers Limited | Other services | 2002 |
| Peterborough Sports Limited | Arts & recreation | 2013 |
| Peterborough Storage Ltd | Administrative & support | 2024 |
| Peterborough Studio Holdings Ltd | Financial services | 2025 |
| Peterborough Studio Properties Ltd | Real estate | 2025 |
| Peterborough Studios Limited | Arts & recreation | 2019 |
| Peterborough Tail Lifts Limited | Manufacturing | 2013 |
| Peterborough Taxi Ltd | Transport & logistics | 2025 |
| Peterborough Telecom Ltd | Information & communication | 2013 |
| Peterborough Tenants Union Ltd | Other services | 2021 |
| Peterborough Town Cricket Hockey and Squash Club Limited(The) | Arts & recreation | 1966 |
| Peterborough Town Shop Ltd | Wholesale & retail | 2023 |
| Peterborough Tractor & Plant Limited | Wholesale & retail | 2013 |
| Peterborough Travel Ltd | Administrative & support | 2026 |
| Peterborough Tree Services Limited | Administrative & support | 1975 |
| Peterborough Tyre & Battery Limited | Wholesale & retail | 1990 |
| Peterborough Tyres and Service Centre Ltd | Wholesale & retail | 2026 |
| Peterborough Unique Towel Services Ltd | Other services | 2021 |