| PaytmOnline recharge | mobile recharge for prepaid & pay postpaid bill@Paytm.com | Retail | Noida | UP | $50 - 100M |
| POLITICOPolitics, Policy, Political News - POLITICO | Online Media | | | $10 - 50M |
| | Internet | Englewood | CO | $1 - 10M |
| PayScale, Inc.
PayScale - Salary Comparison, Salary Survey, Search Wages
| Internet | Seattle | WA | $10 - 50M |
| PluralsightPluralsight | Unlimited Online Developer, IT and Creative Training | Education Management | Farmington | UT | $100 - 250M |
| | Computer Software | Folsom | CA | |
| | Internet | Redwood City | CA | $100 - 250M |
| | Airlines/Aviation | Istanbul, Pendik | | > $1B |
| Party CityBirthday, Theme & Seasonal Party Goods - Party City | Retail | Rockaway | NJ | > $1B |
| | Publishing | San Francisco | CA | $10 - 50M |
| | Internet | San Mateo | CA | $1 - 10M |
| | Financial Services | Wien | Vienna | $50 - 100M |
| PADDYPOWEROnline Betting & Odds | Bet with Paddy Power Sports | Entertainment | Clonskeagh | Dublin | > $1B |
| | Financial Services | London | England | $50 - 100M |
| PandaDocSign Documents Online - Build, Deliver & Track Sales Collateral | Computer Software | San Francisco | CA | $1 - 10M |
| PayZippyPayZippy - The smarter way to pay online. | Internet | | | $10 - 50M |
| | Writing and Editing | Bohemia | NY | $1 - 10M |
| | Computer Software | San Francisco | CA | $1 - 10M |
| | E-Learning | Campo Grande | MS | $100 - 250M |
| | Telecommunications | Santa Cruz | CA | $500M - 1B |
| PTCTechnology Platforms and Solutions to Unlock the Value of the IoT | PTC | Computer Software | Needham | MA | > $1B |
| | Consumer Goods | Cincinnati | OH | > $1B |
| | Telecommunications | Jakarta Pusat, DKI Jakarta | | $250 - 500M |
| ParrotSite Officiel Parrot | Drones, Minidrones, Audio, Objets connectés | Consumer Electronics | Paris | Ile-de-France | $500M - 1B |
| | Sports | Philadelphia | PA | $10 - 50M |
| | Banking | San Francisco | CA | $100 - 250M |
| PurolatorPurolator – Canada's Shipping Company for Courier and Freight | Package/Freight Delivery | Bannon | NB | > $1B |
| | Internet | Toronto | ON | $1 - 10M |
| | Restaurants | Vancouver | WA | > $1B |
| PuppetPuppet - The shortest path to better software | Information Technology and Services | Portland | OR | |
| Progress
Empowering Organizations Through Digital Transformation - Progress
| Computer Software | | | $500M - 1B |
| | Primary/Secondary Education | Indianapolis | IN | $1 - 10M |
| Particle IOParticle: Connect your Internet of Things (IoT) devices | Consumer Electronics | San Francisco | CA | |
| | Insurance | | | |
| ProofpointLeader in Advanced Cybersecurity Solutions | Proofpoint | Computer Software | Sunnyvale | CA | $50 - 100M |
| | Internet | Bucharest | 5th District | $10 - 50M |
| | Computer Software | La Habra | CA | $1 - 10M |
| PayU LLCСистема приема электронных онлайн платежей на сайте через сервис PayU | Financial Services | Moskva | Moscow | $10 - 50M |
| Pitchup.comPitchup.com: campsites and holiday parks in UK, Europe & Americas | Internet | London | | $1 - 10M |
| PlivoSMS API, Voice API, & Global Carrier Provider | Plivo | Telecommunications | San Francisco | CA | $0 - 1M |
| Perforce SoftwarePerforce Software: Connect teams, protect IP, support rapid releases | Computer Software | Alameda | CA | $50 - 100M |
| | Sporting Goods | Crolles | | $10 - 50M |
| Pure StorageEnterprise Flash Storage Solutions - Pure Storage | Computer Hardware | Mountain View | CA | $1 - 10M |
| | Health, Wellness and Fitness | Omaha | NE | $10 - 50M |
| | Computer & Network Security | Wakefield | MA | $1 - 10M |
| | Computer Software | Palo Alto | CA | > $1B |
| Percolate Inc.Percolate | Complete Marketing Software for Global Brands | Computer Software | New York | NY | $1 - 10M |
| P&O FerriesCheap Ferries to France, Ireland & Europe | P&O Ferries - UK | Leisure, Travel & Tourism | Dover | England | > $1B |
| Projectplace
Projectplace - the place to get things done together
| Information Technology and Services | Stockholm | Stockholms ln | $1 - 10M |
| PayU PolskaP??atno??ci Online :: Przelewy Internetowe | PayU Polska | Internet | Poznań | wielkopolskie | |
| PentairPentair | Global Leader in Water, Fluid, Thermal Mgmt & Equipment Protection | Mechanical or Industrial Engineering | Minneapolis | MN | > $1B |
| Pathable, Inc.Event App | Event Apps for Meetings & Conferences - Pathable | Events Services | Seattle | WA | $1 - 10M |
| | Marketing and Advertising | New York | NY | $50 - 100M |
| | Insurance | Kuala Lumpur | | $50 - 100M |
| | Marketing and Advertising | London | England | $0 - 1M |
| | Insurance | Newtown Square | PA | $10 - 50M |
| PeplinkPeplink SD-WAN. Protecting Business Continuity. | Computer Networking | Mountain View | CA | $10 - 50M |
| | Financial Services | Singapore | Singapore | $250 - 500M |
| PUATrainingPUA Training - Become A Pick Up Artist And Pick Up Girls | Professional Training & Coaching | . | NY | $1 - 10M |
| | Machinery | Sanford | NC | $50 - 100M |
| | Internet | Oakville | ON | $0 - 1M |
| PsychAlivePsychAlive - Psychology for Everyday Life | Nonprofit Organization Management | Santa Barbara | CA | $1 - 10M |
| | Information Technology and Services | Orlando | FL | $1 - 10M |
| | Internet | Shah Alam | Selangor | $10 - 50M |
| | Financial Services | Isle of Man | | |
| PrintsomeT-Shirt Printing: Custom T-shirts, Hoodies and more - Printsome | Printing | London | | $1 - 10M |
| PAREXELClinical Research Organization - Contract Research Organization | Pharmaceuticals | Waltham | MA | > $1B |
| | Insurance | Grand Rapids | MI | $100 - 250M |
| Plum BenefitsTravel and Entertainment Corporate Benefits Program - PlumBenefits | Entertainment | New York | NY | > $1B |
| | Computer Networking | San Jose | CA | $1 - 10M |
| Palm Harbor HomesPalm Harbor Homes | Manufactured Homes, Mobile Homes and Modular Home | Construction | Addison | TX | $100 - 250M |
| | Computer Games | Kirkland | WA | $0 - 1M |
| | Information Technology and Services | Vancouver | BC | $100 - 250M |
| | Computer Hardware | Hillsboro | OR | $100 - 250M |
| | Information Technology and Services | Portland | OR | $10 - 50M |
| Pelican WaterWater Softener & Water Filter Systems | Pelican Water | Consumer Goods | DeLand | FL | $1 - 10M |
| | Venture Capital & Private Equity | Sunnyvale | CA | $1 - 10M |
| ProtoShareMockups & Website Wireframes | ProtoShare | Computer Software | Portland | OR | $1 - 10M |
| | Insurance | Kuala Lumpur | Wilayah Persekutuan | $50 - 100M |
| Pru Life UKPru Life UK - Always Listening. Always Understanding. | Financial Services | Taguig City | Metro Manila | |
| PacePace is now a part of ARRIS | Consumer Electronics | Saltaire | West Yorkshire | > $1B |
| | E-Learning | San Francisco | CA | $0 - 1M |
| | Real Estate | Dallas | TX | $500M - 1B |
| PrimeRevenueThe Leader in Supply Chain Finance | PrimeRevenue | Financial Services | | | $10 - 50M |
| | Leisure, Travel & Tourism | New York | NY | $1 - 10M |
| | Internet | Chicago | IL | $1 - 10M |
| | Information Technology and Services | Irvine | CA | $250 - 500M |
| Perle SystemsPerle | Serial to Ethernet, Fiber to Ethernet & Device Networking | Computer Networking | Nashville | TN | $10 - 50M |
| | Design | | | $0 - 1M |
| PixsyPixsy | Find & Fight Image Theft | Internet | San Francisco | CA | $0 - 1M |
| | Financial Services | Sydney | NSW | > $1B |
| PropertybasePropertybase - Real Estate CRM and Marketing Software | Propertybase | Information Technology and Services | | | $0 - 1M |
| | Computer & Network Security | Leesburg | VA | $10 - 50M |
| | Government Administration | Peterborough | | $50 - 100M |
| PersadoHome | Persado - Cognitive Content Platform | Computer Software | New York | NY | $10 - 50M |
| | Real Estate | LOS ANGELES | CA | $0 - 1M |
| | Research | SAN FRANCISCO | CA | $1 - 10M |
| | Information Technology and Services | | | $10 - 50M |
| | Nonprofit Organization Management | WASHINGTON | DC | $0 - 1M |
| Proxim WirelessWireless Broadband, Backhaul Solutions and Access Points – Proxim Wireless | Wireless | Milpitas | CA | $100 - 250M |
