| Business | Phone |
| Advent Clinical Research Center 6161 9th St N, St Petersburg 33703 | (727) 521-9200 |
| Chemsulting Inc 2403 1st Ave S, St Petersburg 33712 | (727) 321-9977 |
| Spiller Research Group 475 Central Ave, St Petersburg 33701 | (727) 826-6400 |
| Eclipse Energy Systems Inc 2345 Anvil St N, St Petersburg 33710 | (727) 344-7300 |
| Hilltop Research 6699 13th Ave N, St Petersburg 33710 | (727) 344-7602 |
| Life Sciences Inc 2900 72nd St N, St Petersburg 33710 | (727) 345-9371 |
| Marine Desalination Systems 1601 3rd St S, St Petersburg 33701 | (727) 821-3993 |