Calgon Carbon Corporation | Bay St Louis | MS | Chemical Manufacturing325188 | 20-99 | ● ACTIVE |
| SISabic Innovative Plastics - Bay St. Louis | Bay St. Louis | MS | Chemical Manufacturing325211 | — | ◐ LIKELY ACTIVE |
| MLMac LLC | Bay St. Louis | MS | Fabricated Metal Product Manufacturing332992 | 20-99 | ◇ UNVERIFIED |
Point Eight Power BSL | Bay Saint Louis | MS | Electrical Equipment, Appliance & Component Manufacturing335313 | 20-99 | ◐ LIKELY ACTIVE |
| BCBayou Concrete LLC Bay St Loui | Bay St Louis | MS | Nonmetallic Mineral Product Manufacturing327320 | — | ◇ UNVERIFIED |
| APAlpek Polyester Mississippi, Inc | Bay St Louis | MS | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| APAlpek Polyester Mississippi, Inc | Bay Saint Louis | MS | Chemical Manufacturing325211 | 100-499 | ◐ LIKELY ACTIVE |
| CCCalgon Carbon Corporation | Bay St. Louis | MS | Chemical Manufacturing325998 | 20-99 | ◐ LIKELY ACTIVE |
| NMNammo MAC, LLC | Bay Saint Louis | MS | Fabricated Metal Product Manufacturing332992 | 20-99 | ◐ LIKELY ACTIVE |
| PEPoint Eight Power BSL | Bay St. Louis | MS | Electrical Equipment, Appliance & Component Manufacturing335313 | 20-99 | ◐ LIKELY ACTIVE |
| SBSABIC Bay St. Louis Facility | Bay Saint Louis | MS | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| SBSABIC Bay St. Louis Facility | Bay St. Louis | MS | Chemical Manufacturing325211 | 20-99 | ◐ LIKELY ACTIVE |
| LCLm Construction LLC | Bay Saint Louis | MS | Fabricated Metal Product Manufacturing332114 | — | ◐ LIKELY ACTIVE |