Frederick "Fritz" Augustus Heinze was an American businessman, known as one of the three Copper Kings of Butte, Montana, along with William Andrews Clark and Marcus Daly. Contemporary assessments variously described him as an intelligent, charismatic but also devious character. To some people in Montana, he was seen as a hero for standing up to the Amalgamated Copper Company, but he also eventually sold his Butte interests to Amalgamated for a reported $12 million. Thereafter, he played a significant role in the Panic of 1907, for which he was indicted but eventually exonerated. Ultimately, Heinze's flamboyant, hard-drinking lifestyle resulted in a hemorrhage of the stomach thought to be caused by cirrhosis of the liver, and he died in November 1914, aged 44.

The Copper Kings were industrialists Marcus Daly, William A. Clark, James Andrew Murray and F. Augustus Heinze. They were known for the epic battles fought in Butte, Montana, and the surrounding region, during the Gilded Age, over control of the local copper mining industry, the fight that had ramifications for not only Montana, but the United States as a whole.