| Mw Industrial Services Inc. | Mobile | AL | $0 |
| Mw Morrissey Construction, LLC | Tucson | AZ | Subcontractor |
| Myers Concrete Construction, LP | Wimberley | TX | $0 |
| My Gialos, LLC | Arnold | MD | Subcontractor |
| Nabholz Construction Corporation | Conway | AR | Subcontractor |
| Nahdat International Company Infrastructure Works | Kuwait | | Subcontractor |
| Nakayashiki Kensetsu, Kk | Misawa-shi | | $0 |
| Nanka Construction Company | Toronto | ON | $0 |
| Nardi Construction, Inc. | Beltsville | MD | $0 |
| Nastos Construction Inc. | Washington | DC | $0 |
| Nationwide Consulting, LLC | North Palm Beach | FL | Subcontractor |
| Native American Contracting LLC | Schertz | TX | Subcontractor |
| Native Nations Procurement Systems,inc | Dallas | TX | $0 |
| Nc & Sons Inc. | Whitehouse Station | NJ | Subcontractor |
| Neeley Construction Company | Puyallup | WA | Subcontractor |
| Neh Commercial Construction, LLC | San Antonio | TX | Subcontractor |
| Nelson HCS, Inc. | Irvine | CA | $0 |
| Nesbitt Construction, Inc. | Springfield | MO | $0 |
| Neumann Brothers, Inc. | Des Moines | IA | $0 |
| New Atlantic Contracting, Inc. | Winston Salem | NC | Subcontractor |
| Newcore Enterprises LLC | Deer Park | WA | $0 |
| New Creation Engineering & Builders, Inc. | Bellflower | CA | $0 |
| New England Specialty Services Inc. | Fall River | MA | Subcontractor |
| Nexgen Construction Group LLC | Waverly | OH | Subcontractor |
| NGC Group Inc. | Lincoln | NE | $0 |
| NHCS, LLC | Groveland | FL | Subcontractor |
| Nicholson & Galloway Inc. | Glen Head | NY | $0 |
| Nick Griego & Sons Construction Inc. | Clovis | NM | Subcontractor |
| Nill Construction, Inc. | Jamestown | ND | $0 |
| Nine Degrees Construction, LLC | Sunland Park | NM | Subcontractor |
| Nipoa Pacific LLC | Honolulu | HI | $0 |
| Noa Pacific Construction, Inc. | Kapolei | HI | Subcontractor |
| Noble Building And Development, LLC | Angleton | TX | $0 |
| Noble Construction And Management, Inc. | Centerbrook | CT | Subcontractor |
| Noble Demolition LLC | San Antonio | TX | Subcontractor |
| North American Construction Company, LLC | Florissant | MO | Subcontractor |
| Northeastern Interior Services LLC | Boonton | NJ | Subcontractor |
| Northern Contracting Corp. | Canton | MA | $0 |
| North Island Corp. | Anchorage | AK | $0 |
| Northland Associates, Incorporated | Liverpool | NY | Subcontractor |
| North Point Builders Of Maryland, LLC | Baltimore | MD | Subcontractor |
| North & South Custom Builders, LLC | Newington | NH | Subcontractor |
| Northstar Steel, Inc. | Minot | ND | Subcontractor |
| Nosal Builders, Inc. | Cheshire | CT | $0 |
| Nowland Associates, Inc. | Newark | DE | $0 |
| NRK Construction, LLC | Baton Rouge | LA | $0 |
| NTC Mazzuca Contracting Inc. | Annapolis Junction | MD | Subcontractor |
| N & T Construction Co. | Beaumont | TX | $0 |
| Ntvi Enterprises, LLC | Fairbanks | AK | $0 |
| Nu Veterans Construction Services, Inc. | Chicago | IL | $0 |
| Oac Services, Inc. | Seattle | WA | $0 |
| Oak Hills Construction, LLC | Milton | WA | $0 |
| Obg Hochbau GMBH & Co. Kg | Ottweiler | | $0 |
| Ocp Contractors Inc. | Holland | OH | Subcontractor |
| O'dell Construction, Inc. | Sheridan | WY | $0 |
| O&g Industries, Inc. | Torrington | CT | $0 |
| Ohla Building, Inc. | Medley | FL | $0 |
| Ojai Contracting Group Inc. | Oak View | CA | $0 |
| Oki Denko Co. Ltd. | Naha | OKINAWA | $0 |
| Olgoonik Corporation | Anchorage | AK | $0 |
| Olsen Construction Services LLC | Berlin | CT | $0 |
| Olympic Builders General Contractors, Inc. | Holmen | WI | Subcontractor |
| Omaha Economic Development Corp. | Omaha | NE | $0 |
| Omni Design, Inc. | San Luis Obispo | CA | Subcontractor |
| One Source Construction LLC | Southborough | MA | $0 |
| Onvico, Inc. | Thomasville | GA | $0 |
| Optima Contracting LLC | Alexandria | VA | Subcontractor |
| Options Unlimited L.L.C. | Horton | KS | $0 |
| Optra Five Enterprise, Inc. | Pasig | | Subcontractor |
| Opus Corporation | Colchester | VT | Subcontractor |
| Opus Costruzioni S.p.a. | Pozzuoli | NAM | $0 |
| Opus Design Build, L.L.C | Hopkins | MN | $0 |
| Orion Construction Co. Inc. | Columbia | SC | $0 |
| Orion Construction Corporation (guam) | Barrigada | GU | Subcontractor |
| Orlich Office Complex LLC | Marquette | MI | $0 |
| O'rourke Groundwater Developing LLC | Adams | NY | Subcontractor |
| Orr J C & Son Inc. | Altoona | PA | $0 |
| Ossam Construction, Inc. | San Juan | PR | Subcontractor |
| Overyork, LLC | Suffolk | VA | $0 |
| Owen-ames-kimball Co. | Grand Rapids | MI | $0 |
| Owen Holland & Sons, LLC | Liberty | MS | $0 |
| Oyster Point Construction Company | Newport News | VA | $0 |
| Ozanne Construction Company Inc. | Cleveland | OH | $0 |
| Pace Pacific Corp. | Phoenix | AZ | $0 |
| Pacific International Electric Company Inc. | Brea | CA | Subcontractor |
| Pacific Max Corp. | Tamuning | GU | Subcontractor |
| Pacific Rim Enterprises Inc. | Pago-pago | AS | $0 |
| Pacific Tech Construction Inc. | Pearl City | HI | $0 |
| Pacificwest Energy Solutions Inc. | Santa Ana | CA | $0 |
| Packs & Walker LLC | Morehead | KY | $0 |
| Pac-west General, Inc. | San Luis Obispo | CA | Subcontractor |
| Page & Associates Contractors Inc. | Amarillo | TX | Subcontractor |
| Paisley Kerr LLC | Henrico | VA | $0 |
| Palgag US LLC | Doral | FL | $0 |
| Panacea Contracting Corp. | Staten Island | NY | Subcontractor |
| Panzitta Enterprises Inc. | Wilkes Barre | PA | $0 |
| Paragon Corporation | Saipan | MP | Subcontractor |
| Paragon Restoration Corp. | Kenilworth | NJ | $0 |
| Paramount Building Construction Inc. | New Windsor | NY | Subcontractor |
| Pardee Construction, LLC | Tulsa | OK | $0 |
