| ExxonMobil | Billings | MT |
| Farmers Union | Laurel | MT |
| Federal Reserve Bank | Helena | MT |
| Fiberglas Engineering & Supply | Billings | MT |
| First National Bank | Great Falls | MT |
| Forsyth Electric Light & Power | Forsyth | MT |
| Forzley Sales | Great Falls | MT |
| General Mills | Great Falls | MT |
| Glasgow Air Force Base | Glasgow | MT |
| Glendive Heat, Light & Power | Glendive | MT |
| GPI | Cut Bank | MT |
| Granite Bimetalic Consolidated Mining | Philipsburg | MT |
| Great Falls International Airport | Great Falls | MT |
| Great Falls Refinery | Great Falls | MT |
| Great Western Sugar | Missoula | MT |
| Great Western Sugar | Billings | MT |
| Heartland Grain Fuels | Butte | MT |
| Helena High School | Helena | MT |
| Helena Power Transmission | Helena | MT |
| Historic Libby High School | Libby | MT |
| Hoerner Waldorf | Missoula | MT |
| Holly Sugar | Sidney | MT |
| Humble Oil & Refinery | Billings | MT |
| Ideal Cement | Trident | MT |
| Intermountain Lumber | Missoula | MT |
| Iowa Valley Sugar | Missoula | MT |
| J. Neils | Troy | MT |
| J. Neils | Libby | MT |
| Kelly Heating Plant | Butte | MT |
| Laurel Oil & Refining | Laurel | MT |
| Legal Tender Mining | Clancy | MT |
| Lincoln County Public Library | Libby | MT |
| Malmstrom Air Force Base | Great Falls | MT |
| Marcus Daly Memorial Hospital | Hamilton | MT |
| McKee Arthur & Company | Anaconda | MT |
| Midland Sugar | Sidney | MT |
| Miles City Air Force Station | Miles City | MT |
| Mineral County Hospital | Superior | MT |
| Missoula Light & Water | Missoula | MT |
| Missoula White Pine Sash | Missoula | MT |
| Montana Coal & Iron | Washoe | MT |
| Montana Dakota Utilities | Sidney | MT |
| Montana-Dakota Utilities | Glendive | MT |
| Montana-Dakota Utilities | Sidney | MT |
| Montana Ore Purchasing | Butte | MT |
| Montana Power & Light | Butte | MT |
| Montana Power & Light | Billings | MT |
| Montana Power & Light | Troy | MT |
| Montana Power & Light | Colstrip | MT |
| Montana State Hospital | Warm Springs | MT |
