Extracts and ingredients business Treatt Plc revealed on Tuesday that chief executive David Shannon had informed the board of his intention to step down from the role as of 31 December.
Treatt has initiated a formal search process to identify and appoint a new CEO, with the group stating it was focused on "securing the right long-term leadership" for the next phase of ots development.
It also stated it has "a strong leadership team", who will work with Shannon on "a smooth handover" in the coming weeks.
Chairman Vijay Thakrar said: "On behalf of the board, I would like to thank David for his contribution to the business and wish him success in his future endeavours."
As of 0920 BST, Treatt shares were up 0.62% at 211.29p.
Reporting by Iain Gilbert at Sharecast.com