- Perfumeriaplus
- PerfumeSouq
- Perfumora - The Scents Marketplace
- Perfuture Technologies
- PerGo Rides
- PergunteDireito
- Pergunter
- Peribanu
- Peribit Networks
- Pericept
- Pericom Semiconductor
- Periculum Services Group
- Peridot
- Peridot Technologies
- Peridrome
- Perigee Global
- Perikopē
- Perillon Software
- Perilous Orbit
- Perimeter E-Security
- Perimeter Markets
- Perimeter Technology Center, Inc.
- PerimeterX
- Period Three
- Perion
- Perion Network
- Perioperative Services
- PeriOptimum
- PerioSeal
- Peripal
- PeriphaGen
- Peripheral Dynamics
- Periscape
- Periscope Co
- Periscope Data
- Periscope Holdings
- Periscope Turkey
- Periscopeency
- Periscopic
- Periscopix
- Perisho Tombor Brown
- Peritek
- Peritia Data Discovery
- Peritus Digital
- Perk
- Perk Canada
- Perk Dynamics
- PerkFinance
- PerkHub
- Perkify
- PERKii
- Perkin-Elmer 3210
- PERKIN-ELMER 3230
- PerkinElmer - aerospace division
- PerkinElmer's Medical Imaging Business
- PerkinElmer, Inc.
- Perkins & Co
- Perkins Engines
- Perkla
- Perkle
- Perkler
- PerkMe
- Perkmylife
- Perks
- Perks4
- PerksLocal
- PerkSpot
- PerkSpy
- PerkStreet Financial
- Perksy
- PerkyCoupons
- PerkyDeals
- PerkyPoll
- Perkz
- Perl
- Perl Mortgage
- Perlara PBC
- Perle Bioscience
- Perle Ventures
- Perlecan Pharma
- Perlegen Sciences
- Perlego
- Perlegoo
- Perleybrook
- Perlos
- Perma
- Perma Cryo Technologie
- Permabit
- Permabit Technology
- Permabots
- Permalink SAS
- Permanent General Companies
- Permanent TSB
- Permanentlisting
- Permasense
- Permasteelisa SpA
- Permaswage Co
- Permatex
- Permedia Research Group