S4 Capital CEO Sir Martin Sorrell revealed he has been treated for cancer and is in the process of recovery.
In a statement to investors on the London Stock Exchange, Sorrell described having a successful keyhole surgery to remove a tumour in February.
“I have made an excellent recovery,” Sorrell wrote. “My conclusion is that I should have preventative treatment over the coming months.”
The ex-WPP CEO and founder said he would be able to work “as normal” most of the time, but will reduce his travel schedule for a few weeks.