Fiserv's CEO Frank Bisignano has suddenly departed the company, triggering a sharp sell-off in FISV shares. The departure was described as unexpected by the street, with no clear succession plan disclosed at the time — the kind of leadership vacuum that unnerves institutional holders. Fiserv reported FY2025 revenue of $21.2B (+3.6% YoY) with a 16.5% net margin and $6.34 diluted EPS, so the underlying business is not in distress, but CEO continuity risk is now the dominant narrative.

The key question is whether this is an isolated governance event or signals deeper strategic disagreement inside the company. Traders will watch for any 8-K disclosures around severance or cause, analyst downgrades, and the speed and credibility of any successor announcement — each of which will set the tempo of any recovery.