Paul Scally has been voted off the board at Gillingham after 29 years at the club.
The former chairman sold his majority stake to American businessman Brad Galinson in December 2022 but continued to serve as a non-executive director.
He was officially voted out of the position by shareholders on Thursday after Galinson called a meeting at Priestfield Stadium.
“We are very frustrated with how little we can say about it,” Galinson told a fan forum event on Thursday evening.
“Mr Scally was removed as a director both at the football club and GFC Holdings, so that was concluded. It’s been a difficult process.”
It ends the 69-year-old’s association with the club with immediate effect.
Gillingham were relegated to League Two in 2022 after nine seasons in League One.
They are aiming to gain promotion this season, and sit in second place before their home game against Accrington Stanley on Saturday.