Alex Mitchell has joined Sky Bet League One side Plymouth Argyle on a permanent transfer for an undisclosed fee.
The centre-back arrived at Charlton in the summer of 2024 from Millwall and has since made 35 appearances in all competitions, 34 of which came in the Addicks’ promotion-winning campaign in 2024/25.
Mitchell now returns to Argyle following a successful loan spell during the 2025/26 season.
Manager Nathan Jones said: "We thank Alex for all his hard work and all he did for us. He played a pivotal role in the first half of our promotion season and then he obviously had a very successful loan at Plymouth.
"He was brilliant around the place, fantastic for the environment and we wish him all the best. He was a pleasure to coach, a pleasure to have around and he’s been a credit to himself."
Everyone at the club would like to thank Alex for his efforts and wish him well for the future.
