| Mid States Electric Co. | Lawton | IA | $0 |
| Midwest Communication Services, Inc. | Battle Creek | MI | $0 |
| Midwestern Electric, LLC | East Chicago | IN | $0 |
| Miles Ahead Technology LLC | Miamisburg | OH | $0 |
| Military Construction Corp. | Merritt Island | FL | $0 |
| Military Construction Corporation | Jacksonville | FL | Subcontractor |
| Millennium Electric, LLC | Billings | MT | Subcontractor |
| Minority Infrastructure- 27 Inc. | Annapolis Junction | MD | Subcontractor |
| Miron Electric Construction Corp. | Chatsworth | CA | $0 |
| Mitchell Electric LLC | North Sioux City | SD | Subcontractor |
| MJF Electrical Contracting Inc. | Morrisville | PA | Subcontractor |
| MJM Electric, Inc. | Tampa | FL | Subcontractor |
| Mk Electric LLC | Malabar | FL | Subcontractor |
| Modesto Industrial Electrical Co. Inc. | Modesto | CA | $0 |
| Mohawk Valley Utility Construction Corp. | Albany | NY | $0 |
| Momentum Electrical Contractors Inc. | Emeryville | CA | Subcontractor |
| Monacacy Valley Electric Inc. | Littlestown | PA | Subcontractor |
| Monkey Tools, LLC | Saint Cloud | FL | Subcontractor |
| Monteiro Electric, Inc. | Berlin | MA | $0 |
| Moody's Electric, Inc. | Bay Minette | AL | $0 |
| Mooney Electrical Services, Inc. | Russellville | AR | $0 |
| Moon Lighting Electric Service, Inc. | Upper Marlboro | MD | Subcontractor |
| Moore Electric & Logistics LLC | Muskogee | OK | $0 |
| Moore's Electrical & Mechanical Construction, Inc. | Altavista | VA | Subcontractor |
| Moore's Installations, LLC | Brandon | MS | $0 |
| Moreland Thompson, Inc. | Santa Maria | CA | Subcontractor |
| Morrow-meadows Corp. | Walnut | CA | Subcontractor |
| Morton Electric, Inc. | Vernal | UT | $0 |
| Motor City Electric Technologies Inc. | Detroit | MI | $0 |
| Motor Control Specialties, Inc. | Maryland Heights | MO | $0 |
| Mountain West Electric Inc. | Blackfoot | ID | $0 |
| Mp Technologies, LLC | Annandale | MN | Subcontractor |
| MRJ Industries, Ltd. | Hampton Bays | NY | Subcontractor |
| Mrse LLC | Davie | FL | Subcontractor |
| Mulhern Electric Co. Inc. | Abington | PA | $0 |
| Multimedia Innovations Group Inc. | Shreveport | LA | $0 |
| Murrill Electric, A Limited Liability Company | Carlsbad | NM | $0 |
| Muska Electric Co. | Roseville | MN | Subcontractor |
| Mwi, Inc. | Albuquerque | NM | Subcontractor |
| My Comm, Inc. | Springfield | OR | $0 |
| My Electrician Inc. | Sun City | CA | $0 |
| Myers Electric & Construction, LLC | Rahway | NJ | $0 |
| Myers Electric Of Eastern New Mexico, Inc. | Clovis | NM | Subcontractor |
| Nabco Electric Company, Inc. | Chattanooga | TN | Subcontractor |
| National Design Group, Inc. | Manassas | VA | Subcontractor |
| National Energy Solutions, Inc. | Fallsington | PA | Subcontractor |
| National Fiber & Copper Inc. | Mount Airy | MD | $0 |
| National Lightning Protection Corp. | Aurora | CO | Subcontractor |
| National Satellite, Inc. | Sewell | NJ | $0 |
| National Signal Corporation | Shelby Township | MI | $0 |
| National Technology Integrators, LLC | Rockville | MD | $0 |
| NCC Electrical Services, Inc. | Bloomfield | NM | $0 |
| Nc Communications, Inc. | Youngsville | NC | Subcontractor |
| Ncore Group, LLC | Germantown | MD | $0 |
| Nc Solar Now Inc. | Raleigh | NC | $0 |
| Neal Electric Corp. | Carlsbad | CA | Subcontractor |
| Neely Communications Inc. | Erie | PA | $0 |
| Negm Electric, LLC | Somersworth | NH | $0 |
| Nelson Electric Company, Inc. | Sparks | NV | $0 |
| Neo Electrical Solutions, LLC | Hudson | WI | $0 |
| Neppel Electrical & Controls, LLC | Moses Lake | WA | Subcontractor |
| Netlink Cabling Systems LLC | Madison | MS | $0 |
| Netplanner Systems, Inc. | Peachtree Corners | GA | Subcontractor |
| Network Cabling Unlimited LLC | Aiea | HI | Subcontractor |
| Network Connectivity Solutions Inc. | Catano | PR | $0 |
| Network Services Group, Inc. | North Little Rock | AR | $0 |
| Neufed LLC | Saint Clair Shores | MI | Subcontractor |
| New Century Electric Inc. | Clayton | NY | $0 |
| New England Communications Inc. | Portland | ME | $0 |
| Newkirk Electric Associates Inc. | Muskegon | MI | Subcontractor |
| New River Electrical Corporation | Cloverdale | VA | Subcontractor |
| Nexcom LLC | Roseburg | OR | $0 |
| Nextgen Systems LLC | Las Vegas | NV | Subcontractor |
| Nightlight Electric Company Inc. | Farmington | NM | $0 |
| Nikkel & Associates Inc. | Ames | IA | $0 |
| N.j. Shaum & Son, Inc. Electrical Contractors | Flagstaff | AZ | $0 |
| Nordic Electric Of Grand Marais, Inc. | Grand Marais | MN | $0 |
| Norman's Electric Service, Inc. | Rushford | MN | $0 |
| Norris Audio Video LLC | Amarillo | TX | $0 |
| North American Information Systems, Inc. | Duncanville | TX | $0 |
| North American Theatrix, Limited | Southington | CT | $0 |
| Northeast Electric, LLC | Woodland | WA | Subcontractor |
| Northeastern Communications, Inc. | Naugatuck | CT | $0 |
| Northland Control Systems, Inc. | Fremont | CA | $0 |
| Northpoint Electrical Contracting, Inc. | Kennewick | WA | Subcontractor |
| North Ridge Electric LLC | Hood River | OR | Subcontractor |
| North River Electric, Inc. | Roseburg | OR | $0 |
| North Slope Telecom, Inc. | Anchorage | AK | Subcontractor |
| North Star Electric Coop Inc. | Baudette | MN | $0 |
| North Star Electric LLC | Valentine | NE | $0 |
| Northwestern Electric, Inc. | Minot | ND | $0 |
| Nova Building Solutions LLC | Aurora | CO | Subcontractor |
| Novaco Anaptyxiaki Techniki E.e. | Athens | | $0 |
| Nova Probst A Joint Venture | Napa | CA | Subcontractor |
| NPR Solutions Inc. | Bayamon | PR | $0 |
| Nuuco Electric Co. | Redmond | WA | Subcontractor |
| NW Power Inc. | West Richland | WA | Subcontractor |
| Ny Conn Corp. The | Danbury | CT | $0 |
| Nytric Electrical Contractors, LLC | Watertown | NY | Subcontractor |
| Oberlander Electric Co. | Mossville | IL | Subcontractor |
