P
- Pagani – Horacio Pagani
- Pamida – PAtrick, MIchael, and DAvid Witherspoon, sons of company co-founder Jim Witherspoon
- Panoz – Don Panoz
- Papa John's Pizza – "Papa" John Schnatter
- Patek Philippe & Co. – Antoni Patek and Adrien Philippe
- Pathé – Charles and Émile Pathé
- Paul Cruickshank Racing – Paul Cruickshank
- Paul K. Guillow, Inc. – Paul K. Guillow
- Paul Morris Motorsport – Paul Morris
- Peavey Electronics – Hartley Peavey
- Penske Corporation – Roger Penske
- PerkinElmer – Richard Scott Perkin and Charles Elmer
- Perot Systems – H. Ross Perot, Jr.
- Perry Ellis International – Perry Ellis
- Petty Enterprises – Lee Petty
- Peugeot – Armand Peugeot
- Pfizer – Charles Pfizer
- Philip Morris International and Philip Morris USA – Philip Morris
- Philips – Gerard Philips
- Piaggio – Rinaldo Piaggio
- Pinarello – Giovanni Pinarello
- Pininfarina – Sergio Pininfarina
- Pirelli – Giovanni Battista Pirelli
- Pontiac – Chief Pontiac
- Porsche – Ferdinand Porsche
- Porsche Design – Ferdinand Alexander Porsche
- Powell Peralta – George Powell and Stacy Peralta
- Prada – Mario Prada
- Pramac d'Antin – Luis d'Antin
- Pressman Toy Corporation – Jack Pressman
- PricewaterhouseCoopers – Samuel Lowell Price, Edwin Waterhouse, William Cooper
- Procter & Gamble – William Procter and James Gamble
- Prost Grand Prix – Alain Prost
- PRS Guitars – Paul Reed Smith
- Pye – William George Pye
Read more about this topic: List Of Companies Named After People