| Business | Phone |
| Virotech International 12 Meem Ave # C, Gaithersburg 20877 | (301) 924-8000 |
| Antex Biologics Inc 300 Professional Dr, Gaithersburg 20879 | (301) 590-0129 |
| Trevigen Inc 8405 Helgerman Ct, Gaithersburg 20877 | (301) 216-2800 |
| Quality Biological Inc 7581 Lindbergh Dr, Gaithersburg 20879 | (301) 840-9331 |
| Oncoimmunin Inc 207 Perry Pkwy # A, Gaithersburg 20877 | (301) 987-7881 |
| Fortune Biologicals Inc 18919 Premiere Ct, Gaithersburg 20879 | (301) 330-8547 |
| Gene Probe Technology 7638b Airpark Rd, Gaithersburg 20879 | (301) 990-8980 |
| Med Immune Inc 1 Medimmune Way, Gaithersburg 20878 | (301) 398-0000 |
| Kirkegaard & Perry Labs Inc 2 Cessna Ct, Gaithersburg 20879 | (301) 948-7755 |