| 1 | WTW | Washington Western Ry. | 7/1923 | | NAKINA |
| 2 | WTW | WASHINGTON WESTERN RWY. | | | PWRC |
| 3 | WTWB | WATCH TOWER BIBLE & TRACT SOCIETY O | | | SCAC4 |
| 4 | WTWL | WOODYS TRAILER WORLD LTD | | | SCAC4 |
| 5 | WTWN | WESTERN TRADE WINDS LTD | | | SCAC4 |
| 6 | WTWR | WET TOWEL INTERNATIONAL | | | SCAC4 |
| 7 | WTWX | Waggoner Refining Co. | 7/1923 | | NAKINA |
| 8 | WTWX | Waggoner Refining Co., Inc. | 7/1930-7/1932 | | NAKINA |
| 9 | WTWX | W.T. Waggoner Estate, Tank Car Dept. | 7/1935 | | NAKINA |
| 10 | WTWX | Waggoner Refining Co., Inc. | 7/1937-4/1938 | | NAKINA |
| 11 | WTWX | W.T. Waggoner Estate Refining Dept. | 1/1941-1/1946 | | NAKINA |
| 12 | WTWX | W.T. Waggoner Estate Refining Dept. (Keith Railway Equipment Co.) | 4/1947 | | NAKINA |
| 13 | WTWX | Waggoner Refining Co., Inc. | Apr-38 | | NRHS |
| 14 | WTWX | KEITH RAILWAY EQUIPMENT CO. [W. T. WAGGONER REFINING CO.] | | | PWRC |
