| KLKrateosky LLC | Naples | FL | — | ◐ LIKELY ACTIVE |
| KAKs92 Ametek Power Data Systems | Wichita | KS | 20–99 | ◐ LIKELY ACTIVE |
| KTK Tooling, LLC | Hancock | NY | — | ◐ LIKELY ACTIVE |
| KIKtw INC | Milford | CT | — | ◐ LIKELY ACTIVE |
| KAKwd Aircraft Support Equipment LLC | Solon | OH | — | ◐ LIKELY ACTIVE |
| KMKwk Manufacturing LLC | Winfield | KS | — | ◐ LIKELY ACTIVE |
| LAL3Harris AS IAS Waco | Waco | TX | 500+ | ◐ LIKELY ACTIVE |
| LTL3Harris Technologies, Integrated Systems L.P. (Andrews AFB) | Andrews AFB | MD | 20–99 | ◐ LIKELY ACTIVE |
| LTL3Harris Technologies, Integrated Systems L.P. (Greenville) | Greenville | TX | 500+ | ◐ LIKELY ACTIVE |
| LMLaitram Machine Shop | New Orleans | LA | 20–99 | ◐ LIKELY ACTIVE |
| LRLake Region Medical, Inc | Brooklyn Park | MN | 100–499 | ◐ LIKELY ACTIVE |
| LPLakeview Precision Machining, Inc. | South Elgin | IL | 20–99 | ◐ LIKELY ACTIVE |
| LML.a. Martin Company | Dearborn | MI | — | ◐ LIKELY ACTIVE |
| LWLamsco West In | Santa Clarita | CA | 100–499 | ◐ LIKELY ACTIVE |
| LRLanair Research & Development INC. | Newington | NH | — | ◐ LIKELY ACTIVE |
| LML'Anse Manufacturing, Inc. | Lanse | MI | 20–99 | ◐ LIKELY ACTIVE |
Lavalier Corp DBA Tapemaster | Troy | MI | 20–99 | ◐ LIKELY ACTIVE |
| LSLazy Sea LLC | Tampa | FL | — | ◐ LIKELY ACTIVE |
| LILeadowski INC | Brooklyn | NY | — | ◐ LIKELY ACTIVE |
| LMLEAP Minneapolis | Minneapolis | MN | 1–19 | ◐ LIKELY ACTIVE |
| LALegacy Aerospace & Defense LLC | Arden | NC | — | ◐ LIKELY ACTIVE |
| LHLeonardo Helicopters Usa, INC. | Alexandria | VA | — | ◐ LIKELY ACTIVE |
| LMLeonards Metal INC | Auburn | WA | — | ◐ LIKELY ACTIVE |
| LCLevantis CORP | Conyers | GA | — | ◐ LIKELY ACTIVE |
| LSLewis & Saunders | Laconia | NH | 20–99 | ◐ LIKELY ACTIVE |
| LGL G Machine & Manufacturing INC | North Richland Hills | TX | — | ◐ LIKELY ACTIVE |
Lifesaving Systems Main Office and Factory - Apollo Beach, Fl | Apollo Beach | FL | 20–99 | ◐ LIKELY ACTIVE |
| LMLighthouse Manufacturing LLC | Portsmouth | NH | — | ◐ LIKELY ACTIVE |
| LALimco Airepair INC. | Tulsa | OK | — | ◐ LIKELY ACTIVE |
| LSLinden Street Capital CORP | Memphis | TN | — | ◐ LIKELY ACTIVE |
| LALISI Aerospace | Torrance | CA | 500+ | ◐ LIKELY ACTIVE |
| LMLittle Mountain Precision, LLC. | Mentor | OH | 20–99 | ◐ LIKELY ACTIVE |
| LALmi Aerospace INC | Saint Charles | MO | — | ◐ LIKELY ACTIVE |
| LVLMI - Vista | Vista | CA | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation | Suffolk | VA | — | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Clarksburg (1508) | Clarksburg | WV | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation FL-Crestview-Eglin AFB (5172) | Crestview | FL | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Lexington KY-Briar Hill Rd (3812) | Lexington | KY | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Lexington Park Site (1379) | Lexington Park | MD | 1–19 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation LM Aircraft Logistics Center (1524) | Greenville | SC | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation Pinellas (2087) | Pinellas Park | FL | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US AL Troy Airport Blvd (5209) | Troy | AL | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US CT Bridgeport South Ave (5220) | Bridgeport | CT | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US CT Shelton Platt Rd (5224) | Shelton | CT | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US CT Stratford Main St (5225) | Stratford | CT | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US CT Trumbull (5227) | Trumbull | CT | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US CT Trumbull Quarry Rd 124 (5228) | Trumbull | CT | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US FL Jupiter Beeline Hwy DFC (5295) | Jupiter | FL | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US GA Marietta S Cobb Dr (1169) | Marietta | GA | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US MS Meridian (1507) | Meridian | MS | 100–499 | ◐ LIKELY ACTIVE |