Mike Lyons resigned as CEO of Fiserv on June 12, 2026, ending a tenure defined almost entirely by one of the most dramatic stock collapses in modern fintech history. Two days later, the company named Takis Georgakopoulos as his replacement.
The departure caps a period in which Fiserv’s stock fell roughly 71%, a decline that accelerated sharply under Lyons after he withdrew optimistic earnings forecasts last October. That single decision triggered a 44% single-day plunge, the largest on record for the company, wiping out approximately $30 billion in market value in a matter of hours.
How Fiserv got here
Frank Bisignano served as Fiserv CEO from 2020 until May 2025, a period marked by aggressive growth targets that the company later struggled to meet.
On October 29, 2025, Lyons pulled back the company’s optimistic earnings forecasts. The 44% crash on that single day was followed by an additional decline of roughly 7% the next day, pushing shares to multi-year lows.
