Angus Cereals has announced plans to end its marketing agreement with Openfield.
The Montrose-based grain marketing and storage co-operative, which has more than 60 members, has also appointed a new chairman.
In a letter to members, newly appointed chairman Patrick Lambert revealed the plans to end the marketing and management services agreement with Openfield in June next year.
Mr Lambert said: “It is increasingly apparently the remote management of the business by Openfield has become unsustainable and, despite the passion and enthusiasm they undoubtedly brought to the relationship and the business in the early years, this has somewhat dwindled.
“Angus Cereals is no longer progressing in the manner required to deliver a sustainable future.”
He said a key objective for the co-op in future would be making full use of its quayside facilities in Montrose.
Mr Lambert was appointed to the role of chairman earlier this year, and Arbroath farmer Peter Cargill was co-opted to the board.