| Business Name | Address | |
| Primary Service Corp | 7845 Airpark Rd # A Gaithersburg, MD 20879 |
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| Lauman Electric | 7204 Mill Run Dr Derwood, MD 20855 |
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| W K Trunnell Inc | 15754 Crabbs Branch Way Rockville, MD 20855 |
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| Cornwell Electric Inc | 16416 Kipling Rd Rockville, MD 20855 |
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| A C Electric Co | 15829 Redland Rd Rockville, MD 20855 |
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