Chair Christine Toretti resigns to become ambassador; CEO McComish named Chair, Grube as Lead Independent Director

S&T BANCORP INC

Christine Toretti resigns as Chair and director effective Sept 28, 2025, after confirmation as U.S. ambassador to Sweden.
Board combines CEO and Chair roles; appoints CEO Christopher J. McComish as Chair effective Sept 28, 2025.
New Lead Independent Director position created; Jeffrey D. Grube appointed, board member since 1997.
Resignation not due to any disagreement with company operations, policies, or practices.

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