| Landmark Corporation | Johnson City | TN | $0 |
| Lane-valente Industries Inc. | Smithtown | NY | $0 |
| Lantz Construction Co. | Broadway | VA | $0 |
| Larry J. Sumrall Contractors, Inc. | Laurel | MS | $0 |
| Lashlee-rich, Inc. | Humboldt | TN | $0 |
| Latcon Corp. | Pueblo | CO | Subcontractor |
| Laverdiere Construction Inc. | Macomb | IL | $0 |
| Lawhon Construction Co. | Saint Joseph | MO | $0 |
| Lawrence Brunoli, Inc. | Farmington | CT | $0 |
| Layton Construction Company, LLC | Sandy | UT | Subcontractor |
| L.b. & Sons, Inc. | Fairfax | VA | $0 |
| LDKC, Inc. | Jenks | OK | $0 |
| Lechase Construction Services, LLC | Rochester | NY | Subcontractor |
| Lee Kennedy Co. Inc. | Quincy | MA | $0 |
| Lehr Construction Company | Saint Joseph | MO | $0 |
| Leon D Dematteis Construction Corp. | Elmont | NY | $0 |
| Leopardo Companies Inc. | Hoffman Estates | IL | $0 |
| Leroy Construcciones C.a. | Caracas | | $0 |
| Letke Security Contractors, Inc. | Joppa | MD | $0 |
| Level Construction Services, Inc. | Atlanta | GA | Subcontractor |
| Lewis Brothers Inc. | Viper | KY | $0 |
| Lexington Contracting, LLC | Lexington | KY | $0 |
| L. Holzner Electric Company | New Haven | CT | $0 |
| Liberty Construction Group Inc. | Coalville | UT | $0 |
| Lighting Retrofit International, LLC | Gambrills | MD | Subcontractor |
| Lighton Electric, Inc. | Toms River | NJ | $0 |
| Limbaugh Construction Co. Inc. | Granite City | IL | $0 |
| Lincoln Builders, Inc. | Ruston | LA | $0 |
| Lindstrom Construction, LLC | Eugene | OR | Subcontractor |
| Little Cedar Creek, L.L.C. | Oskaloosa | IA | $0 |
| Livewire Electrical Systems, Inc. | Calumet Park | IL | Subcontractor |
| LJH Construction, LLC | La Grande | OR | $0 |
| L.j. Paolella Construction, Inc. | Brookhaven | PA | $0 |
| Lli Construction Inc. | Pittsburgh | PA | $0 |
| Lloyd Construction Co. Inc. | Tucson | AZ | Subcontractor |
| Lmo Construction, LLC | Port Orchard | WA | Subcontractor |
| Lobar Associates Inc. | Dillsburg | PA | Subcontractor |
| Lopez James M | El Paso | TX | Subcontractor |
| Lorache Cad IT Services LLC | Renton | WA | $0 |
| Lor Construction,inc | Mesa | AZ | Subcontractor |
| Lou Chandler Inc. | Bossier City | LA | Subcontractor |
| Low Country Building Solutions LLC | Pittsburgh | PA | $0 |
| L.P.'S Excavating Inc. | Williams | AZ | $0 |
| Lra Constructors Inc. | Albany | GA | $0 |
| Lueder Construction Co. | Omaha | NE | Subcontractor |
| Lumbee 56 Construction LLC | Pembroke | NC | Subcontractor |
| Lux Prop Construction, Inc. | Encino | CA | $0 |
| Lyn-rich Contracting Co. Inc. | West Columbia | SC | $0 |
| M2C1 International, LLC | Delta Junction | AK | Subcontractor |
| Mackone Development, Inc. | Los Angeles | CA | $0 |
| Macks Construction Co. | Tamuning | GU | Subcontractor |
| Macro-z Technology Company | Tacoma | WA | $0 |
| Mac's Construction Company, Inc. | Hattiesburg | MS | $0 |
| Mahogany Inc. | Baltimore | MD | Subcontractor |
| Mai Construction, Inc. | San Jose | CA | Subcontractor |
| Maldonado Nursery & Landscaping Inc. | San Antonio | TX | Subcontractor |
| Mallory Group LLC | Virginia Beach | VA | $0 |
| Malone Construction LLC | Schenectady | NY | Subcontractor |
| Maman Corp. | Elk Grove Village | IL | Subcontractor |
| Mandaree Enterprise Corporation | New Town | ND | Subcontractor |
| Mangas Construction LLC | Payson | AZ | $0 |
| Mangum Construction LLC | Clarkston | WA | $0 |
| Manhattan Construction Company LLCHouston, TX · UEI NUALBCKA1K61 | Houston | TX | $0 |
| Manhattan Construction Company LLCTulsa, OK · UEI ZCBMT6X3UMQ5 | Tulsa | OK | $0 |
| Manhattan Construction (florida) LLC | Naples | FL | $0 |
| Maple Leaf Design & Build, Inc. | Rutherfordton | NC | $0 |
| Marchuska Brothers Construction LLC | Vestal | NY | Subcontractor |
| March-westin Company, Inc. | Morgantown | WV | Subcontractor |
| Marco Enterprises, Inc. | Hyattsville | MD | Subcontractor |
| Mar Construction Co. Inc. | Newberry | SC | $0 |
| Mark Construction Co. | Lake Mary | FL | Subcontractor |
| Mark Scott Construction, Inc. | Pleasant Hill | CA | $0 |
| Mark Spaulding Construction Co. | Florence | KY | $0 |
| Mar Paul Co. Inc. | Jessup | PA | $0 |
| Marsh Construction Services, Inc. | Rochester | NY | Subcontractor |
| Martel Construction Inc. | Bozeman | MT | $0 |
| Mart Inc. | Irving | TX | $0 |
| Martinez Services, Inc. | Camarillo | CA | $0 |
| Martone Service Co. Inc. | Narragansett | RI | $0 |
| Maryland Bay Construction LLC | Baltimore | MD | $0 |
| Massaro Corp. | Pittsburgh | PA | $0 |
| Master Builder Constructors, Inc. | Hopkins | SC | $0 |
| Master Contractors Of Va Inc. | Norfolk | VA | $0 |
| Mastercraft Nc, LLC | West Jefferson | NC | $0 |
| Master Interiors, Inc. | Newark | DE | Subcontractor |
| Masterpiece U.S. Inc. | Astoria | NY | Subcontractor |
| Mata Construction Services, Inc. | Los Angeles | CA | $0 |
| Matcon Construction Services, Inc. | Tampa | FL | Subcontractor |
| Mattern Construction Inc. | Baltic | CT | $0 |
| Matthis Construction Company, Inc. | Jacksonville | FL | $0 |
| Mavens, Inc. | Chula Vista | CA | Subcontractor |
| Maweeks LLC | Saint George | UT | Subcontractor |
| Mays Construction Specialties, Inc. | Grand Junction | CO | $0 |
| Mcalvain Group Of Companies Inc. | Boise | ID | $0 |
| Mcdonough Mechanical Services, Inc. | Waukegan | IL | $0 |
| Mcgrath & Associates, Inc. | Saint Louis | MO | $0 |
| Mcinnis Construction Inc. | Silsbee | TX | Subcontractor |
| Mckinley Building Corp. | Wilmington | NC | $0 |
| Mcmeadoy Municipal Services, L.L.C. | Fayetteville | GA | $0 |
| Mc Northwest, LLC | Lakewood | WA | $0 |
