| Pacific Science, LLC | California |
| Pacific Scientific Energetic Materials Company | California |
| Pacific Software Publishing, Inc. | Washington |
| Pacific Star Communications, Inc. | Oregon |
| Pacific States University | California |
| Pacific Systems Design Technologies | Washington |
| Pacific Tech | California |
| Pacific Telematics, Inc. | California |
| Pacific Timesheet | Nevada |
| Pacific Union College | California |
| Pacific Union College Mathematics & Physics | California |
| Pacific University Computer Science | Oregon |
| Pacific University Mathematics | Oregon |
| Pacific Web Effects | California |
| Pacific West Circuits, LLC | California |
| Pacific54 | |
| Pacifica Research | California |
| PacInfo | Oregon |
| Pacira Pharmaceuticals, Inc. | |
| PACIV | Puerto Rico |
| Package Zen, LLC | Illinois |
| Packagecloud | California |
| PackageRoute, LLC | |
| Packback | |
| Packback | |
| Packet Clearing House | California |
| Packet Storm | |
| PacketFabric, Inc. | California |
| PacketFlux Technologies | Montana |
| PacketStorm Communications, Inc. | New Jersey |
| PackGene Biotech, Inc. | Texas |
| Pacotech, Inc. | Texas |
| Pacothane Technologies | Massachusetts |
| PacRim Marketing Group, Inc. | |
| PacTel Solutions, Inc. | Washington |
| Pactronics, Inc. | California |
| PactSafe, Inc. | Indiana |
| Pactum AI, Inc. | |
| Pacylex Pharmaceuticals, Inc. | |
| Padagis, LLC | |
| PADC, LLC | |
| Padi, Inc. | |
| Padlet | California |
| Padova Technologies | Maryland |
| PadSplit, Inc. | |
| Paerpay, Inc. | Massachusetts |
| Pagarba | California |
| Pagari Life Science Corporation | |
| Pagari Life Science Corporation | |
| Pagari Pharmatech, Inc. | |