| SEShaka Engineering INC | Honolulu | HI | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SIShellback Interiors LLC | Bend | OR | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SMShellfish Marine INC | West Sayville | NY | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SMShip Maintenance and repair | Waipahu | HI | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| SMShoaf Marine, INC. | Memphis | TN | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SSSignet Shipbuilding & Repair | Pascagoula | MS | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| SWSouthcoast Welding & Manufacturing-VA | Norforlk | VA | Transportation Equipment Manufacturing336611 | 1-19 | ◐ LIKELY ACTIVE |
| SISouthpoint Industrial Service, LLC | Violet | LA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SCStorm Chasers Marine Services, Incorporated | Seward | AK | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SIStr8 Industries, INC. | Norfolk | VA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SRStructure Repair Services LLC | Virginia Beach | VA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SDSubbase Drydock, INC | Saint Thomas | VI | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SDSubbase Drydock, INC | St Thomas | VI | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SGSubmergence Group LLC | Leander | TX | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SCSun Coast Environmental INC | Atlantic Beach | FL | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SGSuperhull Group, LLC | Venice | FL | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| SLSuperior Labor Services, INC. | Raceland | LA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| TMTactical Marine Repair INC | Chesapeake | VA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| TSTchoupitoulas Street | New Orleans | LA | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| TGThe Great Lakes Towing Company | Cleveland | OH | Transportation Equipment Manufacturing336611 | 100-499 | ◐ LIKELY ACTIVE |
| TCTidal Corrosion Services LLC | Virginia Beach | VA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| TCTidal Corrosion Services LLC | Norfolk | VA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| TDTideborn Defense, LLC | San Marcos | TX | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| TTTitan Talent Development, LLC | Chesapeake | VA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| TLTopship, L.l.c | Gulfport | MS | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| TFTrans Fabrication LLC | Bayou La Batre | AL | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| TMTrident Maritime System LLC | Marinette | WI | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| TMTrident Maritime Systems, LLC | Pascagoula | MS | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| TMTrident Maritime Systems San Diego | San Diego | CA | Transportation Equipment Manufacturing336611 | 100-499 | ◐ LIKELY ACTIVE |
| T2Tsca 2024 | National City | CA | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| TTsfl | Atlantic Beach | FL | Transportation Equipment Manufacturing336611 | 1-19 | ◐ LIKELY ACTIVE |
| TTshi | Pearl City | HI | Transportation Equipment Manufacturing336611 | 1-19 | ◐ LIKELY ACTIVE |
| TMTSUS Miramar | Miramar | FL | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| TTsva | Virginia Beach | VA | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| TTswa | Port Orchard | WA | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| UUUforce USA Sea INC. | Belmont | CA | Transportation Equipment Manufacturing336411 | — | ◐ LIKELY ACTIVE |
| UMUnited Mechanical & Flushing Specialists, LLC | Chesapeake | VA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| USUnited Shipboard Repair, INC. | Portsmouth | VA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| UMUpper Mississippi Fleeting, LLC | Buffalo | IA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| ULUscf LLC | Tempe | AZ | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| VIValliant Industries, INC. | Metairie | LA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
Vigor Marine Seattle | Seattle | WA | Transportation Equipment Manufacturing336611 | 100-499 | ◐ LIKELY ACTIVE |
| VAVirginia Art Metal and Plastic Company | Norfolk | VA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| VEVirginia Electronic Systems, INC. | Virginia Beach | VA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| VMVls Marine Services Port Arthur, LLC | Port Arthur | TX | Transportation Equipment Manufacturing336611 | 100-499 | ◐ LIKELY ACTIVE |
| WNWartsila North America INC | Houston | TX | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |
| WWashington | Bremington | WA | Transportation Equipment Manufacturing336611 | 1-19 | ◐ LIKELY ACTIVE |
| WMWepfer Marine of Calvert City, LLC | Calvert City | KY | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| WMWepfer Marine of Greenville, LLC | Greenville | MS | Transportation Equipment Manufacturing336611 | 20-99 | ◐ LIKELY ACTIVE |
| WRWestside River Marine Construction & Fabrication LLC | Westwego | LA | Transportation Equipment Manufacturing336611 | — | ◐ LIKELY ACTIVE |