Mary Hudson Vandergrift was an American oil business tycoon.[1] At the height of her success, she was one of only three women on Forbes' list of 400 richest Americans.[2] She was the founder and owner of Hudson Oil Company which operated an oil refinery plus 300 gas stations in 35 states. The business later collapsed due to court judgments against her company for allegations of overcharging customers and for underpaying its employees.[3][4][5]