Richard Arnold is leaving his role as Manchester United chief executive, the Premier League club has announced.
With the club since 2007, Arnold worked as commercial director before becoming group managing director in 2013.
The departure of executive vice-chairman Ed Woodward saw him take up the role of chief executive in February 2022, but United have confirmed he is leaving his post.
United said in a statement: "Richard Arnold has decided to step down as chief executive of Manchester United after 16 years with the club.
"Patrick Stewart will take over as interim CEO, in addition to his existing role as general counsel, with Richard continuing to provide transitional support until the end of December. A search process will be carried out for a new permanent CEO."
Outgoing chief executive Arnold said: "It has been an incredible privilege to serve this great football club for the past 16 years.
"Through highs and lows, the constant has been the dedication of our employees and fans.
"I would like to thank all of them for their loyalty and commitment, and wish everyone associated with the club the very best for the future."
The development comes as Jim Ratcliffe edges closer to becoming minority shareholder of United.
Ratcliffe's Ineos group is expected to pay in the region of £1.25bn for a 25% stake in the Old Trafford club, while also acquiring significant control over footballing operations.
Speaking on the news of Arnold’s departure, United executive co-chairman Joel Glazer said: "I would like to thank Richard for his outstanding service to Manchester United over the past 16 years, and wish him all the best for his future endeavours.
"We are fortunate to be able to call on the deep knowledge and experience of Patrick Stewart to provide interim stability and continuity as we embark on a search for a new permanent CEO."
Stewart steps up to the role in the short-term at a club he has worked for since 2006.
United's interim CEO said: "Together with my leadership team colleagues, my job will be to ensure that the club’s foundations remain stable while we embrace changes that can make us stronger over the long term, on and off the pitch, and to support the search for a new permanent CEO."
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