| LGLiberty Goods INC | Monsey | NY | — | ◐ LIKELY ACTIVE |
| LLincolnton | Iron Station | NC | 500+ | ◐ LIKELY ACTIVE |
| LELingle Engineering, INC. | Thousand Oaks | CA | — | ◐ LIKELY ACTIVE |
| LALISI Aerospace | City of Industry | CA | 100–499 | ◐ 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 |
| LLLl1way, LLC | San Antonio | TX | — | ◐ 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 |
| LMLockheed Martin Corporation US NJ Moorestown Centrtn 300 (5201) | Moorestown | NJ | 100–499 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US NJ Mount Laurel Tech Campus (1450) | Moorestown | NJ | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US NY Niagara Falls Blvd (1951) | Niagara Falls | NY | 20–99 | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US NY Owego State Route 17C (1233) | Owego | NY | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Corporation US NY Syracuse Electroncs Pkwy (1021) | Liverpool | NY | 500+ | ◐ LIKELY ACTIVE |
| LMLockheed Martin Sippican, INC. | Manassas | VA | — | ◐ LIKELY ACTIVE |
| LILOCK-N-STITCH Inc. | Turlock | CA | 20–99 | ◐ LIKELY ACTIVE |
| LLongmont | Longmont | CO | 20–99 | ◐ LIKELY ACTIVE |
| LBLutco Bearings | Worcester | MA | 20–99 | ◐ LIKELY ACTIVE |
| MMa | Concord | MA | 1–19 | ◐ LIKELY ACTIVE |
| MAMacLean-Fogg Allanson | Mundelein | IL | 100–499 | ◐ LIKELY ACTIVE |
| MRMacLean-Fogg Richmond | Richmond | IL | 1–19 | ◐ LIKELY ACTIVE |
| MFMA, Fall River - 275 Martine St. (IMS-M) | Fall River | MA | 20–99 | ◐ LIKELY ACTIVE |
| MMMain Machine Co., INC. | Ronkonkoma | NY | — | ◐ LIKELY ACTIVE |
| MManufacturing | Garwood | NJ | 20–99 | ◐ LIKELY ACTIVE |
| MSManufacturing Support | Warren | MI | 1–19 | ◐ LIKELY ACTIVE |
| MIMarion, IL | Marion | IL | 20–99 | ◐ LIKELY ACTIVE |
| MMMarlborough MA | Marlborough | MA | 20–99 | ◐ LIKELY ACTIVE |
| MCMarotta Controls (Chaska) | Chaska | MN | 20–99 | ◐ LIKELY ACTIVE |
| MPMarotta Parsippany | Parsippany | NJ | 100–499 | ◐ LIKELY ACTIVE |
| MSMartin Sprocket & Gear 07 | Montpelier | OH | 100–499 | ◐ LIKELY ACTIVE |
| MSMartin Sprocket & Gear Bloomington MN | Bloomington | MN | 1–19 | ◐ LIKELY ACTIVE |
| MSMartin Sprocket & Gear Charlotte | Charlotte | NC | 1–19 | ◐ LIKELY ACTIVE |
| MSMartin Sprocket & Gear Des Plaines | Des Plaines | IL | 1–19 | ◐ LIKELY ACTIVE |
| MSMartin Sprocket & Gear Kansas City | Kansas City | MO | 1–19 | ◐ LIKELY ACTIVE |
| MSMartin Sprocket & Gear Nashville | Nashville | TN | 1–19 | ◐ LIKELY ACTIVE |
| MSMartin Sprocket & Gear Portland | Portland | OR | 1–19 | ◐ LIKELY ACTIVE |
| MSMartin Sspocket & Gear RPM | Fort Worth | TX | 20–99 | ◐ LIKELY ACTIVE |
| MIMassa Industries, INC | Hingham | MA | — | ◐ LIKELY ACTIVE |