| LL3Harris | Fort Wayne | IN | 500+ | ◐ LIKELY ACTIVE |
| LL3Harris | Clifton | NJ | 500+ | ◐ LIKELY ACTIVE |
| LEL3Harris EDO Western Corporation | South Salt Lake | UT | 100–499 | ◐ LIKELY ACTIVE |
| LNL3harris Nexgen Communications LLC | Londonderry | NH | — | ◐ LIKELY ACTIVE |
| LTL3Harris Technologies, Inc | Ashaway | RI | 20–99 | ◐ LIKELY ACTIVE |
| LTL3Harris Technologies Maripro Inc. | Goleta | CA | 100–499 | ◐ LIKELY ACTIVE |
| LTL3 Technologies, INC. | Salt Lake City | UT | — | ◐ LIKELY ACTIVE |
| LTL3 Technologies, INC. | Londonderry | NH | — | ◐ LIKELY ACTIVE |
| LTL3 Technologies, INC. | Northampton | MA | — | ◐ LIKELY ACTIVE |
| LTL3 Technologies, INC. | Tempe | AZ | — | ◐ LIKELY ACTIVE |
| LLab2Fab | Lewisville | TX | 20–99 | ◐ LIKELY ACTIVE |
| LLakeMaster | Little Falls | MN | 20–99 | ◐ LIKELY ACTIVE |
| LSLanthanide Solutions INC. | Marlborough | MA | — | ◐ LIKELY ACTIVE |
| LSLaronda Sewell | Los Angeles | CA | — | ◐ LIKELY ACTIVE |
| LVLas Vegas | Las Vegas | NV | 20–99 | ◐ LIKELY ACTIVE |
| LVLas Vegas, USA | Las Vegas | NV | 1–19 | ◐ LIKELY ACTIVE |
| LTLaurel Technologies Partnership | Eagan | MN | — | ◐ LIKELY ACTIVE |
| LTLawrence Technologies INC | Dayton | OH | — | ◐ LIKELY ACTIVE |
| LCLear Corporation - Building 200 | Southfield | MI | 20–99 | ◐ LIKELY ACTIVE |
| LCLear Corporation - Plymouth | Plymouth | IN | 20–99 | ◐ LIKELY ACTIVE |
| LSLeidos Security Detection & Automation, INC. | Saint Petersburg | FL | — | ◐ LIKELY ACTIVE |
| LULenexa, USA | Lenexa | KS | 20–99 | ◐ LIKELY ACTIVE |
| LDLeonardo DRS - AIS-R | Beavercreek | OH | 100–499 | ◐ LIKELY ACTIVE |
| LDLeonardo DRS - Burnsville Facility | Burnsville | MN | 20–99 | ◐ LIKELY ACTIVE |
| LDLeonardo DRS - Johnstown Facility | Johnstown | PA | 100–499 | ◐ LIKELY ACTIVE |
| LDLeonardo DRS - Largo Facility | Largo | FL | 100–499 | ◐ LIKELY ACTIVE |
| LDLeonardo DRS - Sidman Facility | Sidman | PA | 20–99 | ◐ LIKELY ACTIVE |
| LSLexington South | Lexington | KY | 20–99 | ◐ LIKELY ACTIVE |
| LELiberty Electronics Inc - A8 | Franklin | PA | 20–99 | ◐ LIKELY ACTIVE |
| LELiberty Electronics, Inc - DeBence Rd | Franklin | PA | 100–499 | ◐ LIKELY ACTIVE |
| LILibertyville, IL | Libertyville | IL | 1–19 | ◐ LIKELY ACTIVE |
| LPLiggett, Philip Alden | Bremerton | WA | — | ◐ LIKELY ACTIVE |
| LELingle Engineering, INC. | Thousand Oaks | CA | — | ◐ LIKELY ACTIVE |
| LCLittleton CO - Continental | Littleton | CO | 20–99 | ◐ LIKELY ACTIVE |
| LCLittleton CO - Shaffer | Littleton | CO | 20–99 | ◐ LIKELY ACTIVE |
| LALivelink Aerospace INC | Saint George | UT | — | ◐ LIKELY ACTIVE |
| LALkd Aerospace, LLC | Snoqualmie | WA | — | ◐ LIKELY ACTIVE |
| LMLocal Manufacturing, LLC | Los Ranchos | NM | — | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation | Virginia Beach | VA | — | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Camden Campus (5189) | Camden | NJ | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Gilbert AZ (1390) | Gilbert | AZ | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Killeen Campus (1420) | Killeen | TX | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Pascagoula Campus (1212) | Pascagoula | MS | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Santa Barbara CA (1384) | Goleta | CA | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US AK Anderson Clear AFS (5433) | Anderson | AK | 1–19 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US CA San Diego Woden St (1235) | San Diego | CA | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US GA Warner Robins WWLD (1400) | Warner Robins AFB | GA | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US MA Marion Front St (2448) | Marion | MA | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US ME Bath SUPSHIP Washgtn St (1198) | Bath | ME | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US NJ Moorestown Bortn Lndg Rd (1015) | Moorestown | NJ | 500+ | ◐ LIKELY ACTIVE |