The Canadian streaming firm has bought all of Stillwater's gold production for the life of the mine and, initially, also 4.5% of its total palladium output.
Anglo American Platinum kept the dividend tap flowing as it reaps the benefits of a pivot to mechanised mining that has lifted productivity and cut costs.
Uncertainty around the charter has deterred investment into a sector that accounts for 8 percent of gross domestic product in the world's top platinum producer.