| KEKaiser Electroprecision | Irvine | CA | — | ◇ UNVERIFIED |
| KCKearfott Corporation | Montville Twp | NJ | — | ◇ UNVERIFIED |
| KCKearfott Corporation Motion Systems Division | Black Mountain | NC | — | ◇ UNVERIFIED |
| KGKearfott Guidance and Navigation | Little Falls | NJ | — | ◇ UNVERIFIED |
| KOKern Oil Filter Recycling LLC | Benicia | CA | — | ◇ UNVERIFIED |
| KAK&l Auto Worx INC Dba Auto Revival | Rancho Cordova | CA | — | ◇ UNVERIFIED |
Klein Marine Systems | Newburyport | MA | — | ◇ UNVERIFIED |
| LAL3 Aviation Products INC | Sarasota | FL | — | ◇ UNVERIFIED |
| LCL-3 Communications | Fort Drum | NY | — | ◇ UNVERIFIED |
| LCL-3 Communications Avionics System INC | Grand Rapids | MI | — | ◇ UNVERIFIED |
| LCL3 Communications, Interstate Electronic | Anaheim | CA | — | ◇ UNVERIFIED |
| LCL-3 Communications - Titan CORP Linkablt Div | Melbourne | FL | — | ◇ UNVERIFIED |
| LCL3 Communications Wescam | Healdsburg | CA | — | ◇ UNVERIFIED |
| LAL3harris - Alst | Orlando | FL | — | ◇ UNVERIFIED |
L3harris Cincinnati Electronics Dba Sonoma Eo | Santa Rosa | CA | — | ◇ UNVERIFIED |
| LIL3harris - Interstate Electronics Corporation | Yorba Linda | CA | — | ◇ UNVERIFIED |
| LL3harris-oceanserver | Imperial Beach | CA | — | ◇ UNVERIFIED |
| LOL3harris Oceanserver INC | Fall River | MA | — | ◇ UNVERIFIED |
| LRL3harris Randtron Antenna Systems | Menlo Park | CA | — | ◇ UNVERIFIED |
| LRL3harris - Randtron Antenna Systems - Small Antenna Suite 1 | San Leandro | CA | — | ◇ UNVERIFIED |
| LTL3harris Technologies | Mount Olive | NJ | — | ◇ UNVERIFIED |
| LTL3harris Technologies INC | Los Angeles | CA | — | ◇ UNVERIFIED |
| L3L 3 Interstate Electronics Corporation | Anaheim | CA | — | ◇ UNVERIFIED |
| LTL3 Technologies | Fort Belvoir | VA | — | ◇ UNVERIFIED |
| LTL3 Technologies Link Simulation & Training | Binghamton | NY | — | ◇ UNVERIFIED |
| LALa Auto Collision Center INC | San Fernando | CA | — | ◇ UNVERIFIED |
| LALang Automotive | Lake Forest | CA | — | ◇ UNVERIFIED |
| LSLankershim Speedy Express INC | Sun Valley | CA | — | ◇ UNVERIFIED |
| LALegion Auto Group | Santa Fe Springs | CA | — | ◇ UNVERIFIED |
| LILeidos INC | Vista | CA | — | ◇ UNVERIFIED |
| LMLighthouse Microwave | Wenona | IL | — | ◇ UNVERIFIED |
| LALitton Advanced Systems INC | San Jose | CA | — | ◇ UNVERIFIED |
| LALitton Advanced Systems INC | San Jose | CA | — | ◇ UNVERIFIED |
| LGLitton Guidance and Control Sy | Northridge | CA | — | ◇ UNVERIFIED |
| LGLitton Guidance & Control Sys | Woodland Hills | CA | — | ◇ UNVERIFIED |
| LMLitton Marine Systems | Charlottesville | VA | — | ◇ UNVERIFIED |
| LSLitton Sys INC Guidance & Control Sys | Goleta | CA | — | ◇ UNVERIFIED |
| LMLockheed Martin | Hill Air Force Base | UT | — | ◇ UNVERIFIED |
| LMLockheed Martin | Colorado Springs | CO | — | ◇ UNVERIFIED |
| LMLockheed Martin | Pearl Harbor | HI | — | ◇ UNVERIFIED |
| LMLockheed Martin at East Coast Repair and Fabrication | Newport News | VA | — | ◇ UNVERIFIED |
| LMLockheed Martin at Nassco Norfolk | Norfolk | VA | — | ◇ UNVERIFIED |
| LMLockheed Martin at Nbsd | San Diego | CA | — | ◇ UNVERIFIED |
| LMLockheed Martin Corporation | Syracuse | NY | — | ◇ UNVERIFIED |
| LMLockheed Martin Corporation | Kings Bay | GA | — | ◇ UNVERIFIED |
| LMLockheed Martin Corporation | Colorado Springs | CO | — | ◇ UNVERIFIED |
| LMLockheed Martin Laser and Sensor Systems Bothell | Bothell | WA | — | ◇ UNVERIFIED |
| LMLockheed Martin Mfc (gvab) | East Camden | AR | — | ◇ UNVERIFIED |
| LMLockheed Martin Mission Systems and Training | Riviera Beach | FL | — | ◇ UNVERIFIED |
| LMLockheed Martin Rms at Norfolk Naval Station | Norfolk | VA | — | ◇ UNVERIFIED |