The Florence-Goldfield Mining Company incorporated in 1909 with principal office and mining operations in Goldfield, Nevada. Collection contains two purchase transactions by the Western Ore Purchasing Company, both on October 1, 1909, for bullion produced by the Florence-Goldfield Mining Company.

The Goldfield Consolidated Milling and Transportation Company incorporated under the laws of Wyoming in August 1909 and operated in Goldfield, Nevada; it was a subsidiary owned entirely by the Goldfield Consolidated Mines Company. Collection contains one receipt from the Gutta Percha & Rubber Manufacturing Company in 1916 for the purchase of pure gum rubber sleeves.

The Jumbo Extension Mining Company incorporated as successor to the Jumbo and Vernal Extension Mining Company in April 1904. Office and mining property was located in Goldfield, Nevada. Collection contains a payment receipt from the Goldfield Mine Operators' Association and a 1932 telegram regarding a "sensational strike" on the Jumbo claim.

The Occident Divide Mining Company was established around 1921 in Goldfield, Nevada, located in the West Divide Mining District. Collection contains one blank letterhead from the Occident Divide Mining Company. Letterhead includes company name, location, and agents.