Everton captain Phil Jagielka is set to depart the club after 12 years of service.
The 36-year-old centre-back joined from Sheffield United in 2007 and has been a mainstay for the Goodison Park club.
He has been club captain since 2013, when Phil Neville left.
"It's been hard to confirm my situation for next season as that decision hadn't been fully made by the club until now," Jagielka said on Instagram.
"Unfortunately my journey at Everton has come to an end after 12 fantastic seasons, I have been lucky enough to play over 380 games and lucky enough to be club captain for six years.
"All I can say is thanks to all the players I've played alongside, all the staff that have helped me in their own way, the chairman and of course the amazing fans."
Everton chairman Bill Kenwright said Jagielka was "one of Everton's greatest servants".
"From the day he joined us in July 2007, he has epitomised what it is to be an Evertonian and will remain someone who embodies the spirit and values of the Blues," he added.