| P1Plant 1 | Wellington | OH | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| P2Plant 2/4 | Wellington | OH | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| P3Plant 3 | Wellington | OH | Transportation Equipment Manufacturing336390 | 1-19 | ◐ LIKELY ACTIVE |
| P5Plant 5,6,7,9 | Wellington | OH | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| PVPleasant Valley Teardrop Trailers, LLC | Sugarcreek | OH | Transportation Equipment Manufacturing336214 | 100-499 | ◐ LIKELY ACTIVE |
| PAPmag & Associates, LLC | Dayton | OH | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| PMProfessional Marine and Industrial Staff Services LLC | Ashtabula | OH | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| RLRadar Love Company | Findlay | OH | Transportation Equipment Manufacturing336360 | 20-99 | ◐ LIKELY ACTIVE |
| REReberland Equipment, INC. | Apple Creek | OH | Transportation Equipment Manufacturing336110 | — | ▲ REPORTED CLOSED |
| RTRocketforce Technologies LLC | Mason | OH | Transportation Equipment Manufacturing336415 | — | ◐ LIKELY ACTIVE |
| RRRoll Rite Louisville | Louisville | OH | Transportation Equipment Manufacturing336390 | 1-19 | ◐ LIKELY ACTIVE |
| RLRoshel LLC | Springfield | OH | Transportation Equipment Manufacturing336992 | — | ◐ LIKELY ACTIVE |
SAF-HOLLAND, Inc - Cincinnati | Fairfield | OH | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| SIS&A Industries | Akron | OH | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| SSanoh-America | Sanoh America 7905 Industrial Park Dr, Mt. Vernon | OH | Transportation Equipment Manufacturing336340 | 100-499 | ◐ LIKELY ACTIVE |
| SRSA Rail, LLC | Maumee | OH | Transportation Equipment Manufacturing336510 | 1-19 | ◐ LIKELY ACTIVE |
| SAScarlet Aerospace Technologies LTD. | Fairborn | OH | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| SSSelecttech Services Corporation | Dayton | OH | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| SAServices ACSC OH | Springdale | OH | Transportation Equipment Manufacturing336412 | 100-499 | ◐ LIKELY ACTIVE |
| SSServices STAC Cincinnati | Springdale | OH | Transportation Equipment Manufacturing336412 | 20-99 | ◐ LIKELY ACTIVE |
| SISetex Inc | Saint Marys | OH | Transportation Equipment Manufacturing336330 | 100-499 | ◐ LIKELY ACTIVE |
| SDSH Distributing | Burbank | OH | Transportation Equipment Manufacturing336214 | 20-99 | ◐ LIKELY ACTIVE |
| SVShiloh Valley City | Valley City | OH | Transportation Equipment Manufacturing336370 | 20-99 | ◐ LIKELY ACTIVE |
| SSidney | Sidney | OH | Transportation Equipment Manufacturing336370 | 100-499 | ◐ LIKELY ACTIVE |
| STSK Tech Inc. | Englewood | OH | Transportation Equipment Manufacturing336370 | 20-99 | ◐ LIKELY ACTIVE |
SkyMark Refuelers, LLC | Findlay | OH | Transportation Equipment Manufacturing336211 | 20-99 | ◐ LIKELY ACTIVE |
| S1Source 1 Alloys, INC. | Cincinnati | OH | Transportation Equipment Manufacturing336412 | — | ◐ LIKELY ACTIVE |
| SASpringfield Assembly Plant | Springfield | OH | Transportation Equipment Manufacturing336112 | 500+ | ◐ LIKELY ACTIVE |
| SWStainless Works, Inc. | Streetsboro | OH | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| SEStanley Electric US Co Inc - ELP | London | OH | Transportation Equipment Manufacturing336320 | 100-499 | ◐ LIKELY ACTIVE |
| SHSTE Hackney Inc - Kidron, OH | Kidron | OH | Transportation Equipment Manufacturing336212 | 100-499 | ◐ LIKELY ACTIVE |
| SAStellar Automotive Group | Seville | OH | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| STSutphen Towers, Inc. | Hilliard | OH | Transportation Equipment Manufacturing336211 | 100-499 | ◐ LIKELY ACTIVE |
| SUSutphen Urbana | Urbana | OH | Transportation Equipment Manufacturing336120 | 100-499 | ◐ LIKELY ACTIVE |
| SMSystematic Machine CORP | North Royalton | OH | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
Tas-co Thompson & Sons Company INC | Crestline | OH | Transportation Equipment Manufacturing336370 | — | ◐ LIKELY ACTIVE |
| TCTelamon Corporation - Dayton | Dayton | OH | Transportation Equipment Manufacturing336320 | 20-99 | ◐ LIKELY ACTIVE |
| TGThe Great Lakes Towing Company | Cleveland | OH | Transportation Equipment Manufacturing336611 | 100-499 | ◐ LIKELY ACTIVE |
| TRTHK Rhythm North America (Ohio) | Hebron | OH | Transportation Equipment Manufacturing336330 | 100-499 | ◐ LIKELY ACTIVE |
| TPTMG Performance Products | Berea | OH | Transportation Equipment Manufacturing336390 | 20-99 | ◐ LIKELY ACTIVE |
| TMToledo Molding & Die Tiffin Plant | Tiffin | OH | Transportation Equipment Manufacturing336390 | 100-499 | ◐ LIKELY ACTIVE |
| TTToledo Tool and Die Bennett | Toledo | OH | Transportation Equipment Manufacturing336370 | 100-499 | ◐ LIKELY ACTIVE |
| TTToledo Tool and Die Pioneer | Pioneer | OH | Transportation Equipment Manufacturing336370 | 100-499 | ◐ LIKELY ACTIVE |
| TTToledo Transmission Operations | Toledo | OH | Transportation Equipment Manufacturing336350 | 500+ | ◐ LIKELY ACTIVE |
| TITrailstar International Inc. | Alliance | OH | Transportation Equipment Manufacturing336212 | 20-99 | ◐ LIKELY ACTIVE |
| TITransdigm INC | Cleveland | OH | Transportation Equipment Manufacturing336413 | — | ◐ LIKELY ACTIVE |
| TITransglobal Inc | Upper Sandusky | OH | Transportation Equipment Manufacturing336212 | 100-499 | ◐ LIKELY ACTIVE |
| TMTransmission Manufacturing Plant - Ohio | Russells Point | OH | Transportation Equipment Manufacturing336350 | 500+ | ◐ LIKELY ACTIVE |
| TITrenton IC | Trenton | OH | Transportation Equipment Manufacturing336212 | 100-499 | ◐ LIKELY ACTIVE |
| TTrimline | Lagrange | OH | Transportation Equipment Manufacturing336370 | 20-99 | ◐ LIKELY ACTIVE |