Brendan Rodgers made his feelings known about the failure to build from a position of strength with Peter Lawwell telling shareholders that the summer window had been frustrating.
It is believed that Rodgers is already in talks with at least one transfer target with Hay confident that business will be done this time around.
“As we head into another transfer window, I am sure that there will be targets and I also suspect that the club will come out of the window stronger than when they went in,” the Celtic ambassador told the Evening Times.
“That comes down to the manager and the chief executive working together and I think you will see that over the next couple of months.
“There will be lessons learned from the summer window and if the AGM is anything to go by then I think we can be safe in the knowledge that everyone has the best interests of the club at heart.”