| Southwark Metal Mfg Co NE | Manufacturing | 0 | - | F |
| Southwark Metal Mfg Co PA | Manufacturing | 0 | - | D |
| Southwark Metal Mfg Co SC | Manufacturing | 0 | - | F |
| Southwaste Employment LLC CO | Transportation & Warehousing | 0 | - | F |
| Southwest NH | - | 0 | - | - |
| Southwest - Customer Service & Support TX | - | 0 | - | - |
| Southwest - Dallas Lovefield Airport TX | - | 0 | - | - |
| Southwest - San Antonio Int'l Airport TX | - | 0 | - | - |
| Southwest - William P. Hobby TX | - | 0 | - | - |
| Southwest - William P. Hobby Airport TX | - | 0 | - | - |
| Southwest Administrators, Inc. CA | - | 0 | - | - |
| Southwest Airlines AL | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines AZ | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines CA | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines CO | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines CT | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines FL | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines GA | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines HI | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines ID | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines IL | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines IN | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines KY | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines LA | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines MA | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines MD | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines MI | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines MN | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines MO | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines NC | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines NE | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines NH | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines NM | Transportation & Warehousing | 0 | - | - |
| Southwest Airlines NV | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines NY | Transportation & Warehousing | 0 | - | - |
| Southwest Airlines OH | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines OK | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines OR | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines PA | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines RI | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines SC | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines TN | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines UT | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines VA | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines WA | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines WI | Transportation & Warehousing | 0 | - | F |
| Southwest Airlines ( RESCINDED/UPDATED 01/12/2021) MA | - | 0 | - | - |
| Southwest Airlines (Terminal Rd) TX | - | 0 | - | - |
| Southwest Airlines (Union Contact Correction) CO | - | 0 | - | - |
| Southwest Airlines - Hollywood Burbank Airport CA | - | 0 | - | - |