| JPJeffery P Morin | Fredericksburg | TX | — | ◐ LIKELY ACTIVE |
| JIJetcruzer International, LLC | Murrieta | CA | — | ◐ LIKELY ACTIVE |
| JEJet Engine Support INC. | Farmers Branch | TX | — | ◐ LIKELY ACTIVE |
| JAJetilus Aero, LLC | Stillwater | OK | — | ◐ LIKELY ACTIVE |
| JPJet Procurement Services INC | Greeneville | TN | — | ◐ LIKELY ACTIVE |
| JNJ.h. Newton L.l.c | Broken Arrow | OK | — | ◐ LIKELY ACTIVE |
| JJJ & J Machine & Tool, INC. | Knoxville | TN | — | ◐ LIKELY ACTIVE |
| JLJ & L Machine CO. INC. | Manchester | CT | — | ◐ LIKELY ACTIVE |
| JCJ-mark Connectors INC | Wichita | KS | — | ◐ LIKELY ACTIVE |
| JAJoby Aviation Bonny Doon Quarry | Santa Cruz | CA | 20–99 | ◐ LIKELY ACTIVE |
| JAJoby Aviation Marina | Marina | CA | 500+ | ◐ LIKELY ACTIVE |
| JAJoby Aviation San Carlos | San Carlos | CA | 100–499 | ◐ LIKELY ACTIVE |
| JAJoby Aviation Santa Cruz | Santa Cruz | CA | 100–499 | ◐ LIKELY ACTIVE |
| JPJohn Prosock Machine Inc | Quakertown | PA | 20–99 | ◐ LIKELY ACTIVE |
| JTJohnson Technology, Inc. - Norton | Norton Shores | MI | 100–499 | ◐ LIKELY ACTIVE |
| JPJohnstown, PA | Johnstown | PA | 100–499 | ◐ LIKELY ACTIVE |
| JBJoint Base Andrews, MD (MD001) | Andrews AFB | MD | 20–99 | ◐ LIKELY ACTIVE |
| JBJoint Base Charleston, SC (SC006) | Joint Base Charleston | SC | 100–499 | ◐ LIKELY ACTIVE |
| JBJoint Base Elmendorf-Richardson, AK (AK002) | Elmendorf AFT | AK | 20–99 | ◐ LIKELY ACTIVE |
| JBJoint Base Lewis-McChord, WA (WA026) | Joint Base Lewis Mcchord | WA | 20–99 | ◐ LIKELY ACTIVE |
| JBJoint Base McGuire-Dix-Lakehurst, NJ (NJ005) | Trenton | NJ | 20–99 | ◐ LIKELY ACTIVE |
| JBJoint Base Pearl Harbor Hickam P&W F-119 Engine Shop | Hickam | HI | 1–19 | ◐ LIKELY ACTIVE |
| JLJonal Labs Logistics, LLC | Meriden | CT | — | ◐ LIKELY ACTIVE |
| JIJrlon, INC. Epd | Spencerport | NY | 20–99 | ◐ LIKELY ACTIVE |
| JOJupiter One USA LLC | Palm Bay | FL | — | ◐ LIKELY ACTIVE |
| KAKaiser Aircraft Ind. Inc. | Birmingham | AL | 20–99 | ◐ LIKELY ACTIVE |
| KMKAL Manufacturing | Webster | NY | 20–99 | ◐ LIKELY ACTIVE |
| KKaman | Bennington | VT | 100–499 | ◐ LIKELY ACTIVE |
| KAKaman Aerospace Corporation | Bloomfield | CT | — | ◐ LIKELY ACTIVE |
Kaman Aerospace Group - Kaman Air Vehicles | Bloomfield | CT | 100–499 | ◐ LIKELY ACTIVE |
| KMKathleen Marie Kiesling | Fort Worth | TX | — | ◐ LIKELY ACTIVE |
| KAKay and Associates, INC. | Buffalo Grove | IL | — | ◐ LIKELY ACTIVE |
| KAKay & Associates INC | Lemoore | CA | — | ◐ LIKELY ACTIVE |
| KMKay Manufacturing Co. | Saint Joseph | MI | 20–99 | ◐ LIKELY ACTIVE |
| KDKaze Drones INC | Grand Forks | ND | — | ◐ LIKELY ACTIVE |
| KGKeel - Gratiot | Merrill | MI | 20–99 | ◐ LIKELY ACTIVE |
| KWKeel - Wheeler | Saginaw | MI | 20–99 | ◐ LIKELY ACTIVE |
| KKKemet Konnections INC | Spring | TX | — | ◐ LIKELY ACTIVE |
| KWKent, WA (WA006) | Kent | WA | 500+ | ◐ LIKELY ACTIVE |
| KLKerr Lakeside Inc. | Euclid | OH | 20–99 | ◐ LIKELY ACTIVE |
| KVKerry Ventures LLC | Tampa | FL | — | ◐ LIKELY ACTIVE |
| KMKhalsa Metal Products, INC | Kentwood | MI | — | ◐ LIKELY ACTIVE |
| KEkinetic Engines Systems | Phoenix | AZ | 100–499 | ◐ LIKELY ACTIVE |
| KFKinetic Frames LLC | Talking Rock | GA | — | ◐ LIKELY ACTIVE |
| KPKingdom Precision LLC | Clearwater | FL | — | ◐ LIKELY ACTIVE |
| KAKira Art Jv LLC | Blytheville | AR | — | ◐ LIKELY ACTIVE |
| KTKit Turbines LLC | Houston | TX | — | ◐ LIKELY ACTIVE |
| KPKKSP Precision Machining Michigan | East China | MI | 20–99 | ◐ LIKELY ACTIVE |
| KBKosher Barty INC | Pomona | NY | — | ◐ LIKELY ACTIVE |
| KMKoziol Manufacturing LLC | Milwaukee | WI | — | ◐ LIKELY ACTIVE |
| 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 |