Fiserv’s former CEO, now running Social Security, targeted by senators after stock plunges Milwaukee Journal SentinelDemocratic senators raise concerns about Trump appointee’s time leading Fiserv WPRFiserv grilled over ex-CEO Payments DiveSSA chief Bisignano faces probe from Wyden and Warren over Fiserv stock and federal contract concerns Government ExecutiveHagens Berman Announces Investigation into Fiserv, Inc. (FI), Company Facing Lawmakers’ Scrutiny After Admission to Objectively Difficult-to-Achieve Guidance Assumptions, “‘Abysmal’” Q3 2025 Results The AI Journal