Greek Antetokounmpo and Swede Forsberg join an ownership group that also includes actress Reese Witherspoon and Tennessee Titans running back Derrick Henry.
"My father was a professional soccer player, and it was the first sport I fell in love with in Greece,” said Antetokounmpo, in a statement on the Nashville SC website. "I’ve always had the dream of owning a soccer team.
"When my brothers and I explored Nashville SC, we knew it was a team and a city that we wanted to get involved with."
The Antetokounmpo ownership share is a family affair with his brothers Thanasis, Kostas and Alex, who also play professional basketball, involved.
In their fourth season Nashville SC opened the 2023 campaign last Saturday with a 2-0 win over New York City FC.
"Soccer is a global sport, and our newest owners once again reinforce our club’s commitment to being a global team,” said Nashville SC principal owner John Ingram.
"Filip and Giannis are not just amazing athletes – they are ambassadors for their respective sports, role models for millions and advocates in their home towns and worldwide."