| Phaser Studio, Inc. | |
| PhaseV | |
| PhaseWare | Texas |
| Phasor Lab | |
| PhAST Diagnostics | Massachusetts |
| Phathom Pharmaceuticals | |
| Phaver | |
| Phazm Webdesign | Oregon |
| PHD Consulting, Inc. | Maine |
| PHD, Inc. | Indiana |
| phData | Minnesota |
| PHDwin | Texas |
| Pheast Therapeutics | |
| Phelco Technologies, Inc. | |
| Phelix Research and Development | |
| Phenaki | |
| Phenix Real Time Solutions, Inc. | |
| Phenom People, Inc. | |
| Phenomenex, Inc. | |
| Phenomix Sciences | Minnesota |
| PhenoPath, PLLC | |
| PhenoVista Biosciences | California |
| Phenx Machine Learning Technologies, Inc. | |
| Pherona | |
| Phesi | |
| Phi Life Sciences | |
| Phi Optics, Inc. | Illinois |
| Phi Web Studio | |
| Phia | |
| Phiar Technologies, Inc. | California |
| Phidev, Inc. | |
| Phidiax, LLC | Colorado |
| Phigenix, Inc. | Georgia |
| Phihong USA, Inc. | California |
| Phil Zimmermann | California |
| Phil's Computer Repair | Pennsylvania |
| Philadelphia Alliance for Capital and Technologies | Pennsylvania |
| Philadelphia area Linux Users Group | Pennsylvania |
| Philadelphia Area SAS Users Group | Pennsylvania |
| Philadelphia Perl and Raku Mongers | Pennsylvania |
| Philadelphia Trust Company | |
| Philadelphia Web Design | |
| Philander Smith University | Arkansas |
| Philantro, Inc. | |
| Philatron | California |
| Philex Enterprises, Inc. | California |
| Philippa Gamse | California |
| Philliou Partners, LLC | |
| Phillip Capital, Inc. | Illinois |
| Phillip Roy, Inc. | Florida |