| Pacific Nanotechnology Inc. | Santa Clara, California, United States |
| Pacific Northwest National Laboratory | Richland, Washington, United States |
| PacketFront Sweden AB | Hagersten, Sweden |
| PAETEC | Waltham, Massachusetts, United States |
| Page Southerland Page LLP | Dallas, Texas, United States |
| Palmer & Dodge LLP | Boston, Massachusetts, United States |
| Palo Alto Research Center | Palo Alto, California, United States |
| Palomar Technologies | Vista, California, United States |
| PamGene | RX’s-Hertogenbosch, Netherlands |
| PANalytical Inc. | Westborough, Massachusetts, United States |