This former Russian Wagner mercenary is the first to speak publicly : NPR

Western governments and analysts who study the group believe the Wagner Group is financed by Yevgeny Prigozhin, the same oligarch still wanted by the FBI for interfering in the 2016 U.S. presidential election. Limonier says Pregozhin has an empire based on three types of activities. 

"The first type of activity is, of course, mercenary and the security business," he says. "The second type is the disinformation business and information warfare, and the third is the exploitation of natural resources in Africa." 

 … A recent documentary that aired on the France 2 public television network shows how these three activities intersect to — as the documentary puts it — prop up corrupt regimes, terrorize local populations and spin lies…

https://www.npr.org/2022/06/06/1102603897/wagner-group-mercenary-russia-ukraine-war