Here is a list of the celebrities that now own a stake in the UFC, as collected from ESPN. The Williams sisters are the most vested in the company. 
Photo by Frazer Harrison/Zuffa LLC
Conan O’Brien
Ben Affleck
Tom Brady
Robert Kraft
Mark Wahlberg
Adam Levine
Cam Newton
Serena Williams
Venus Williams
Maria Sharapova
The Weeknd
Anthony Kiedis
Flea
Li Na
Guy Fieri
Calvin Harris
LL Cool J
Michael Bay
Trey Parker
Tyler Perry
Jimmy Kimmel
Rob Dyrdek
Sylvester Stallone
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