According to WEWS, Victor Espinoza is giving his portion of the prize for coming in first in the Belmont Stakes to City of Hope, a research and treatment facility in California.
Shortly after the race, The Courier-Journal reported Espinoza saying, "I didn't make any money, because I donated my money to the City of Hope."
The cancer treatment facility isn't the only charity benefitting from the historic win.
The owners of American Pharaoh announced they are donating $50,000 to the Permanently Disabled Jockeys Fund, while another $50,000 will go to the California Retirement Management Account, The Courier-Journal reported.
That group raises money for retired California racehorses.
A third $50,000 donation will go to Old Friends Farm.