On March 3, 2025, Fiserv hit an all-time high near $238.59 per share. It closed at $55.32 on April 7, 2026, and traded around $57 intraday on April 8 — a decline of roughly 76% to 77% from the peak. The company that processes payments and runs core banking technology for more than a quarter of all U.S. credit unions has lost roughly three-quarters of its market value in thirteen months.
The decline unfolded across a CEO departure, a guidance withdrawal, a single-day crash, Congressional scrutiny, and a business that stopped growing the way the market expected.
The Leadership Exit
On December 4, 2024, President-elect Donald Trump nominated Fiserv CEO Frank Bisignano to lead the Social Security Administration. The Senate confirmed him on May 6, 2025, and he resigned from Fiserv the same day. Michael P. Lyons, formerly president of PNC Financial Services Group, stepped in as CEO.
Between his confirmation and July 1, Bisignano sold approximately 2.6 million Fiserv shares for roughly $423 million, according to law firm Hagens Berman. Congressional investigators have placed the total divestitures higher — Representatives Larson and Himes cited approximately $560 million in sales between May and August, and referred Bisignano to the SEC for investigation into the timing of those divestitures. Senators Warren and Wyden launched a separate probe.
Bisignano has since also taken on the role of IRS chief executive, effective October 2025. The share sales were required as part of his transition to government service. The question lawmakers are asking is whether the earnings guidance he left behind was realistic — and whether that matters.
The Guidance Collapse
On October 29, 2025, new CEO Mike Lyons withdrew the full-year earnings guidance Bisignano had set. Lyons described the prior targets as "objectively difficult to achieve."
The original 2025 guidance called for adjusted EPS of $10.15 to $10.30 and organic revenue growth of 10%. Lyons cut that to $8.50 to $8.60 in adjusted EPS and 3.5% to 4% revenue growth. Third-quarter results came in at $2.04 adjusted EPS — 23% below the $2.64 Wall Street expected — on revenue of $4.92 billion, missing estimates by roughly 8%.
Fiserv stock fell more than 40% on October 29, 2025, its worst single-session decline on record.
What Drove the Decline
Three factors converged.
Argentina's contribution shrank. In 2024, Fiserv's Argentine operations contributed 10 percentage points to its 16% organic revenue growth. In 2025, that contribution dropped to 2 percentage points as the country's economic environment shifted. A significant growth driver that had amplified company-wide numbers declined rapidly.
The banking business contracted. Fiserv's Financial Solutions segment — which includes core processing for banks and credit unions — posted a 2% revenue decline for the full year and a 7% decline in Q4 2025, according to Fiserv's earnings release. CEO Lyons acknowledged losing market share, specifically noting losses on the smaller credit union side of the business. Fiserv lost a net 99 credit union core-processing clients over the year — the largest decline of any core vendor — and its core market share dropped from approximately 27% to 25.9%, a decline of 118 basis points.
Clover fell short of targets. The Clover point-of-sale platform, which Fiserv has positioned as its primary growth engine, posted 7.5% U.S. volume growth in Q3. Fiserv cut its Clover revenue target for the year from $3.5 billion to $3.3 billion.
Full Year 2025 and the 2026 Outlook
For the full year 2025, Fiserv reported revenue of $21.19 billion, up 4% from the prior year. Adjusted EPS came in at $8.64, down 2%. The Merchant Solutions segment grew 5%. Financial Solutions grew 2% for the year but ended on a declining trajectory, with Q4 revenue down 7% year-over-year.
For 2026, Lyons guided to organic revenue growth of 1% to 3% and adjusted EPS of $8.00 to $8.30 — lower than 2025. He characterized the year as "a critical investment and transition year" and unveiled a turnaround strategy branded "One Fiserv," focused on client retention, Clover expansion, platform differentiation, an operational partnership with IBM, and disciplined capital allocation.
Where Fiserv Stands Now
Fiserv remains a $21 billion revenue company. It processes payments for millions of merchants and runs core banking technology for 1,155 credit unions — more than any other core provider. Fiserv's broader credit union relationships extend well beyond core processing, with the company stating that more than 3,300 credit unions use some combination of its products and services. Clover continues to grow, and the merchant business is stable.
The challenge is on the banking side. Financial Solutions revenue is declining, core-processing client counts are shrinking, and the 2026 guidance signals another year of contraction before any turnaround takes hold. Lyons has been transparent about the reset, framing it as a necessary recalibration after years of guidance that outpaced what the underlying business could deliver.
Whether the "One Fiserv" strategy stabilizes the banking business or accelerates the shift toward merchant services will determine what kind of company Fiserv becomes on the other side of this transition — and what that means for the thousands of institutions that depend on it.