| Peter Allison Agriservices Limited | Forfar | 2009 |
| Peter Bacon Recycling Limited | Bawsey | 2004 |
| Peter Bulle Ltd | Wolverhampton | 2024 |
| Peter Clarke Limited | Stourbridge | 2014 |
| Peter Norris (Haulage) Limited | Farnham | 1972 |
| Peter Turner (Metals) Limited | West Midlands | 1982 |
| Peterborough Clothes for Cause Limited | Peterborough | 2025 |
| Peterborough Green Energy Ltd | Peterborough | 2015 |
| Peterborough Limited | Peterborough | 2018 |
| Peterborough Skip Hire Ltd | Peterborough | 2022 |
| Petersfield Road Management Co Ltd | Alton | 1997 |
| Petra Peak Projects Ltd | London | 2025 |
| Petrobaz Engineering Limited | Harrow | 2017 |
| Petrotech Environmental Ltd | Cookstown | 2011 |
| Pets in the Clouds Ltd | Northampton | 2025 |
| Pets in the Clouds North East Ltd | Birtley | 2025 |
| Pezzzt Environmental Ltd | Lichfield | 2016 |
| Pfas-X Ltd | Cambridge | 2025 |
| Pfasys Ltd | Swindon | 2025 |
| PFL (Filter Media) Limited | Bolton | 2015 |
| PFX Services Ltd | London | 2025 |
| PG Metals Bredbury Ltd | Stockport | 2021 |
| PG Tippers Ltd | Caterham | 1993 |
| PGC Dismantling Limited | Heywood | 2016 |
| PGM Technologies Inc. Ltd | London | 2023 |
| PGM Technologies Limited | Mexborough | 2019 |
| Pgskips Limited | Shrewsbury | 2000 |
| Pgwtc Ltd | Redhill | 2016 |
| PH Drains & Mains Ltd | Rickmansworth | 2017 |
| PH Global Ltd | Brentwood | 2023 |
| PH Hull & Sons Limited | Ragdale, Melton Mowbray | 2000 |
| PH Waste Management & Recycling Limited | Bristol | 2005 |
| Phab Utilities Limited | Cardiff | 2022 |
| Pharaonclothing Ltd | Liverpool | 2025 |
| Pharmawaste Ltd | Stockport | 2020 |
| Phelps Brothers Limited | Gloucester | 2006 |
| Phenviro Ltd. | Barnstaple | 2023 |
| Phil MEE Ltd | Mansfield | 2011 |
| Philbin Glass Recycling Limited | Wigan | 2017 |
| Phileo Care Provider Limited | Canterbury | 2019 |
| Philip Street Car Breakers Ltd | St Philips | 2005 |
| Phillip Rance Limited | Shefford | 2020 |
| Phillips Waste Management Ltd | Selby | 2018 |
| Phils Drainage Services Limited | Fleet | 2024 |
| Phoenix 48 Limited | Bourne | 2021 |
| Phoenix Adam Ltd | London | 2011 |
| Phoenix Carbon Limited | Stowmarket | 2020 |
| Phoenix Clearance Ltd | Royston | 2022 |
| Phoenix County Metals Limited | Northampton | 1984 |
| Phoenix Couriers (Basingstoke) Limited | Camberley | 1989 |
| Phoenix EM Ltd | Glasgow | 2021 |
| Phoenix Environmental Ltd | Airdrie | 2023 |
| Phoenix Environmental Management Ltd | Chelmsford | 2018 |
| Phoenix Extreme Ltd | Barrow-In-Furness | 2026 |
| Phoenix Furnishings Limited | Sunderland | 1998 |
| Phoenix Furniture (Kettering) Ltd. | Northamptonshire | 2005 |
| Phoenix Industrial Plastics UK Limited | Birmingham | 1973 |
| Phoenix Liquid Waste Ltd | Nr Hailsham | 2011 |
| Phoenix Oils Ltd | Gillingham | 2016 |
| Phoenix Properties (Nottingham) Limited | Nottingham | 2001 |
| Phoenix Vehicle Recycling Limited | Cradley Heath | 2022 |
| Phoenix Vessel Technology Limited | Gloucester | 2006 |
| Phoenix Washroom Services Ltd | Tilbury | 2011 |
| Phoenix Waste Disposal Ltd | Maesteg | 2023 |
| Phoenix Waste Management Limited | High Wycombe | 2014 |
| Phoenix Waste UK Ltd | Falmouth | 2017 |
| Phoenix Water Technologies Ltd | Beaconsfield | 2003 |
| Phos Cycle Limited | Birmingham | 2018 |
| PHX Water Ltd | Perth | 2018 |
| Pickford Contracting Limited | Sheffield | 2000 |
| Picrom Limited | Glossop | 2001 |
| Picsipoc Limited | Greenford | 2026 |
| Pictorial Sign Company Limited | Gloucester | 1990 |
| Pier London Limited | Rainham | 2024 |
| Pier NON Ferrous Metals Limited | Leigh On Sea | 2014 |
| Pier to Pier Waste Management Ltd | Brighton | 2025 |
| Piggy Junk Ltd | London | 2014 |
| Pikemill Services Limited | Bolton | 2025 |
| Pilkington Asbestos Removal Services Limited | Rhyl | 2007 |
| Pillory Down Skips Limited | Sutton | 2016 |
| Pilotdome Limited | Wigan | 1985 |
| Pils Recycling Limited | Bury | 2026 |
| Pinball Metals Ltd | Bulwell | 2018 |
| Pine Hygiene Limited | Horsham | 2007 |
| Pinewade Limited | Leeds | 1989 |
| Pink Drainage Limited | Watford | 2021 |
| Pink Grab Hire Manchester Ltd | Manchester | 2025 |
| Pink Skips (NW) Ltd | Preston | 2015 |
| Pink Skips Leeds Ltd | Bradford | 2019 |
| Pink Skips Skip + Grab Hire Manchester Limited | Leyland | 2025 |
| Pinkleaf Limited | Stanmore | 2007 |
| Pinkney & Allman Limited | Leicester | 1946 |
| Pinnacle Heights International Limited | Wolverhampton | 2025 |
| Pinnacle Metals Ltd | Grimethorpe | 2006 |
| Pinpoint Drainage Services Ltd | Ashford | 1999 |
| Pinwhinnie Property Company Limited | Glasgow | 2017 |
| Pipe Patrol and Paving Ltd | London | 2026 |
| Pipe Tech Line Limited | Westcliff-On-Sea | 2023 |
| Pipeclear Ltd | Burnley | 2004 |
| Pipedreamengineers Ltd | London | 2025 |