| Revolution Lighting Technologies, Inc. | Stamford | CT | $0 |
| R - G Engineering, Inc. | San Juan | PR | Subcontractor |
| Riverside Drives, Inc. | Cleveland | OH | $0 |
| Rja Technology LLC | Madisonville | TN | $0 |
| R&M Lumen Electrical, Inc. | Hialeah | FL | Subcontractor |
| Roger Electric Corp. | Bayamon | PR | $0 |
| Rohe International Incorporated | Warrendale | PA | $0 |
| Roundhouse Electric & Equipment Co. Inc. | Odessa | TX | $0 |
| Royal Electrical Services, Inc. | Pueblo | CO | $0 |
| RPS America Inc. | West Chester | OH | Subcontractor |
| RTM Lighting & Electronics, Inc. | Vista | CA | Subcontractor |
| Santa Fe Distributing, Inc. | Lenexa | KS | $0 |
| Schultz Communications Inc. | Marble Falls | TX | $0 |
| Schwing Electrical Supply Corp. | Riverhead | NY | $0 |
| SDM & Associates Inc. | Glassboro | NJ | Subcontractor |
| Secoma | Sittard | | $0 |
| Secucontrol Inc. | Alexandria | VA | $0 |
| Security Equipment Supply, Inc. | Earth City | MO | $0 |
| Select Equipment Co. Inc. | Kokomo | IN | Subcontractor |
| Sentinel Power Inc. | New Stanton | PA | Subcontractor |
| Seyller Electric Inc. | Stuttgart | AR | $0 |
| Sheraden Lighting & Electrical Products Corporation | Staten Island | NY | $0 |
| Shipboard Electrical Supply, Inc. | Virginia Beach | VA | Subcontractor |
| Silmar Electronics, Inc. | Doral | FL | Subcontractor |
| Simcona Electronics Corporation | Rochester | NY | Subcontractor |
| Simply Reliable Power Incorporated | Miramar | FL | Subcontractor |
| Sonepar Distribution New England, Inc. | Brockton | MA | Subcontractor |
| Sonepar Italia S.p.a. | Padova | | $0 |
| South Dade Electrical Supply, Inc. | Miami | FL | $0 |
| Spot Lighting Supplies Inc. | Long Beach | CA | $0 |
| SRN Systems, Inc. | Bradenton | FL | $0 |
| Stanion Wholesale Electric Co. Inc. | Pratt | KS | Subcontractor |
| Stanton Industrial Electric Supply, Inc. | Wilkinsburg | PA | Subcontractor |
| Steven Engineering, Incorporated | South San Francisco | CA | Subcontractor |
| Stokes Electric Company | Knoxville | TN | Subcontractor |
| Stoneway Electric Supply Co.Seattle, WA · UEI CGYKVT73AAU1 | Seattle | WA | $0 |
| Stoneway Electric Supply Co.Richland, WA · UEI Q365K2KK7RC1 | Richland | WA | $0 |
| Stoneway Electric Supply Co.Kent, WA · UEI S3MHAY7SLPG7 | Kent | WA | $0 |
| Stoneway Electric Supply Co.Tacoma, WA · UEI T7M9VEJSE1A3 | Tacoma | WA | $0 |
| Stoneway Electric Supply Co.Everett, WA · UEI WS8PC7JCVMY3 | Everett | WA | $0 |
| Stoneway Electric Supply Co.Spokane, WA · UEI ECL8GT69JC63 | Spokane | WA | Subcontractor |
| Stoneway Electric Supply Co.Walla Walla, WA · UEI FUG2EK34KDZ4 | Walla Walla | WA | $0 |
| Stranco Products, Inc. Of Illinois | Bolingbrook | IL | $0 |
| Stromquist & Company, Inc. | Atlanta | GA | $0 |
| Sumitomo Electric Device Innovations U.S.A Inc. | San Jose | CA | Subcontractor |
| Summit Electric Supply, LLCCorpus Christi, TX · UEI C68RCFH3SNK6 | Corpus Christi | TX | $0 |
| Summit Electric Supply, LLCHouston, TX · UEI EYMDVDGLPU19 | Houston | TX | Subcontractor |
| Summit Electric Supply, LLCSan Antonio, TX · UEI J1BYYFKTGLT7 | San Antonio | TX | Subcontractor |
| Summit Electric Supply, LLCSanta Fe, NM · UEI KK2SJGFTUCQ4 | Santa Fe | NM | $0 |
| Sunray Electric Supply Co. Inc. | Mckeesport | PA | $0 |
| Supercircuits, Inc. | Austin | TX | Subcontractor |
| Tco LLC | Norman | OK | $0 |
| T & C Specialty Distributors, Inc. | Waynesboro | MS | $0 |
| TD4 Electrical Of Missouri, LLC | Earth City | MO | $0 |
| T&D Engineering And Supply Limited Liability Company | Howell | NJ | $0 |
| Tech Electric Company, Inc. | Menomonee Falls | WI | $0 |
| Techno Care General Trading | South Farwaniya | | Subcontractor |
| Tecno-lite De Puerto Rico, Inc. | Carolina | PR | $0 |
| Tele-fonika Cable Americas Corp. | Lockport | IL | $0 |
| Terminal Supply Inc. | Troy | MI | $0 |
| The Powers Group | Lakeport | CA | $0 |
| The Power Source, Inc. | Gilroy | CA | $0 |
| TMS Supplies Inc. | Manassas | VA | Subcontractor |
| Tocor Inc. | Louisville | KY | $0 |
| Toni Levy & Associates, Inc. | Louisville | KY | $0 |
| Traffic Control Corporation | Woodridge | IL | Subcontractor |
| Traffic Signal Controls, Inc. | Frederick | CO | $0 |
| Tri Power Systems | Modesto | CA | $0 |
| Tri-star Industrial Equipment Co. | Memphis | TN | $0 |
| Tri-tek Group, LLC | Mesa | AZ | $0 |
| Triton Supply Inc. | Grand Prairie | TX | Subcontractor |
| Unipower, LLC | Annandale | NJ | Subcontractor |
| Unique Lift Parts Inc. | Silverdale | PA | $0 |
| Unmanned Systems Source LLC | Tucson | AZ | Subcontractor |
| Uptime Power Services, Inc. | San Jose | CA | Subcontractor |
| Uusco Of Illinois Inc. | West Chicago | IL | Subcontractor |
| Van & Smith Co. Inc. | Tampa | FL | Subcontractor |
| Vernon L Cobb | Piedmont | AL | $0 |
| Viking Electric Supply, LLC | Minneapolis | MN | Subcontractor |
| Vision Electric Wholesale Inc. | Alhambra | CA | $0 |
| Walters Wholesale Electric Co. | Brea | CA | $0 |
| Warwick Wire & Cable Inc. | Warminster | PA | $0 |
| Waytek Inc. | Chanhassen | MN | $0 |
| Wedco Inc. | Reno | NV | Subcontractor |
| Werner Electric Supply Co. | Appleton | WI | Subcontractor |
| Wesbell Electronics, LLC. | Merrimack | NH | $0 |
| Wesco Anixter Uk Limited | Bracknell | | Subcontractor |
| Wesco Distribution Inc.Augusta, GA · UEI NMXXLNKHYFV5 | Augusta | GA | $0 |
| Wesco Distribution Inc.Salt Lake City, UT · UEI UKDWR1X16QQ5 | Salt Lake City | UT | Subcontractor |
| Wesco Distribution, Inc.Honolulu, HI · UEI HZN2K5B1H9U5 | Honolulu | HI | Subcontractor |
| Wesco Distribution, Inc.Jacksonville, FL · UEI L8NCM57JJDA7 | Jacksonville | FL | $0 |
| Wes-garde Components Group, Inc. | Lakeland | FL | Subcontractor |
| West Coast Energy Systems LLC | Stockton | CA | Subcontractor |
| Western Cable And Components, Inc. | Riverside | CA | $0 |
| Western Electrical Alliance LLC | Richfield | UT | Subcontractor |
| Western Pennsylvania Properties LLC | Grove City | PA | $0 |
| Western United Electric Supply Corporation | Brighton | CO | Subcontractor |
| Wheeler Benitas, LLC | Snellville | GA | Subcontractor |
| Wholesale Electric Caribe Inc. | Barceloneta | PR | Subcontractor |
| Wholesale Electric Supply Co. Of Houston Inc. | Houston | TX | Subcontractor |
