Commitments and Contingencies	6 Months Ended
Jun. 30, 2026
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation and Investigation Matters In the normal course of business, the Company or its subsidiaries are named as defendants in lawsuits in which claims are asserted against the Company. The Company maintained an accrual of $18 million and $25 million at June 30, 2026 and December 31, 2025, respectively, related to its various legal proceedings. In the opinion of management, the liabilities, if any, which may ultimately result from such legal proceedings are not expected to have a material adverse effect on the Company’s consolidated financial statements. On June 12, 2026, an amended federal securities law complaint was filed against the Company and four former senior executives (Frank J. Bisignano, Michael P. Lyons, Robert W. Hau, and John Gibbons) in the United States District Court for the Southern District of New York. The amended complaint is brought on behalf of a putative class of purchasers of Company securities from February 6, 2024 to October 28, 2025 and alleges violations of Section 10(b) of the Securities Exchange Act of 1934 (the “Exchange Act”), and Rule 10b-5 thereunder, and Section 20(a) of the Exchange Act. The amended complaint alleges, among other things, that certain statements made by the Company about the growth of its Clover business management platform and the impact of the Company’s Argentina business on its organic growth were false and/or misleading and led to a decline in the Company’s stock price over the purported class period. The action is captioned In re Fiserv, Inc. Securities Litigation, No. 1:25-cv-06094. Between December 10, 2025 and February 3, 2026, derivative complaints were filed by purported Company shareholders Richard Martin, Nathan Silva, and Gary Peterson in the United States District Court for the Eastern District of Wisconsin. On May 18, 2026 and June 3, 2026, respectively, these actions were consolidated and lead counsel was appointed. On February 27, 2026 and April 14, 2026, derivative complaints were filed by purported Company shareholders Scott Kracht, Karen Artman, and Jenny Zhang in the Wisconsin Circuit Court for Milwaukee County. On June 12, 2026, these actions were consolidated and lead counsel was appointed. The actions name Messrs. Bisignano and Lyons, and certain other current and former officers and directors of the Company as individual defendants, and the Company as the nominal defendant, and generally allege that certain individual defendants breached their fiduciary duties and violated the Exchange Act in connection with, among other things, factual allegations made in the In re Fiserv, Inc. Securities Litigation action. The actions also allege that certain individual defendants are liable for trading in Company stock at artificially inflated prices. The actions are stayed pending a decision on a forthcoming motion to dismiss in the In re Fiserv, Inc. Securities Litigation action. The Company has also received demands on the board of directors from purported Company shareholders that the Company pursue certain litigation against certain of its current and former directors and officers alleging, among other things, supposed breaches of duty based on factual allegations made in the In re Fiserv, Inc. Securities Litigation action. The Company may receive additional demands and these demands may precede derivative actions which name the Company as a nominal defendant. The defendants have not yet answered or otherwise responded to any of the complaints in these actions. The Company intends to vigorously defend these cases but cannot predict with any degree of certainty the outcome of the suits or determine the extent of any potential liability or damages. In November 2025, the Company began responding to requests for information from the Enforcement Division of the U.S. Securities and Exchange Commission and the U.S. Attorney’s Office for the Southern District of New York in connection with investigations related to the Company’s 2025 earnings guidance. The Company is cooperating with these investigations. Electronic Payments Transactions In connection with the Company’s processing of electronic payments transactions, which are separate and distinct from the settlement payment transactions described in Note 1, funds received from subscribers are invested from the time the Company collects the funds until payments are made to the applicable recipients. These subscriber funds are invested in short-term, highly liquid investments. Subscriber funds, which are not included in the Company’s consolidated balance sheets, can fluctuate significantly based on consumer bill payment and debit card activity and totaled $1.3 billion and $1.7 billion at June 30, 2026 and December 31, 2025, respectively. Indemnifications and Warranties The Company may indemnify its clients from certain costs resulting from claims of patent, copyright or trademark infringement associated with its clients’ use of the Company’s products or services. The Company may also warrant to clients that its products and services will operate in accordance with identified specifications. From time to time, in connection with sales of businesses, the Company agrees to indemnify the buyers of such businesses for liabilities associated with the businesses that are sold. Payments, net of recoveries, under such indemnification or warranty provisions were not material to the Company’s consolidated financial statements.

In the normal course of business, the Company or its subsidiaries are named as defendants in lawsuits in which claims are asserted against the Company. The Company maintained an accrual of $18 million and $25 million at June 30, 2026 and December 31, 2025, respectively, related to its various legal proceedings. In the opinion of management, the liabilities, if any, which may ultimately result from such legal proceedings are not expected to have a material adverse effect on the Company’s consolidated financial statements.

On June 12, 2026, an amended federal securities law complaint was filed against the Company and four former senior executives (Frank J. Bisignano, Michael P. Lyons, Robert W. Hau, and John Gibbons) in the United States District Court for the Southern District of New York. The amended complaint is brought on behalf of a putative class of purchasers of Company securities from February 6, 2024 to October 28, 2025 and alleges violations of Section 10(b) of the Securities Exchange Act of 1934 (the “Exchange Act”), and Rule 10b-5 thereunder, and Section 20(a) of the Exchange Act. The amended complaint alleges, among other things, that certain statements made by the Company about the growth of its Clover business management platform and the impact of the Company’s Argentina business on its organic growth were false and/or misleading and led to a decline in the Company’s stock price over the purported class period. The action is captioned In re Fiserv, Inc. Securities Litigation, No. 1:25-cv-06094.

Between December 10, 2025 and February 3, 2026, derivative complaints were filed by purported Company shareholders Richard Martin, Nathan Silva, and Gary Peterson in the United States District Court for the Eastern District of Wisconsin. On May 18, 2026 and June 3, 2026, respectively, these actions were consolidated and lead counsel was appointed. On February 27, 2026 and April 14, 2026, derivative complaints were filed by purported Company shareholders Scott Kracht, Karen Artman, and Jenny Zhang in the Wisconsin Circuit Court for Milwaukee County. On June 12, 2026, these actions were consolidated and lead counsel was appointed. The actions name Messrs. Bisignano and Lyons, and certain other current and former officers and

directors of the Company as individual defendants, and the Company as the nominal defendant, and generally allege that certain individual defendants breached their fiduciary duties and violated the Exchange Act in connection with, among other things, factual allegations made in the In re Fiserv, Inc. Securities Litigation action. The actions also allege that certain individual defendants are liable for trading in Company stock at artificially inflated prices. The actions are stayed pending a decision on a forthcoming motion to dismiss in the In re Fiserv, Inc. Securities Litigation action.

The Company has also received demands on the board of directors from purported Company shareholders that the Company pursue certain litigation against certain of its current and former directors and officers alleging, among other things, supposed breaches of duty based on factual allegations made in the In re Fiserv, Inc. Securities Litigation action. The Company may receive additional demands and these demands may precede derivative actions which name the Company as a nominal defendant.

The defendants have not yet answered or otherwise responded to any of the complaints in these actions. The Company intends to vigorously defend these cases but cannot predict with any degree of certainty the outcome of the suits or determine the extent of any potential liability or damages.

In November 2025, the Company began responding to requests for information from the Enforcement Division of the U.S. Securities and Exchange Commission and the U.S. Attorney’s Office for the Southern District of New York in connection with investigations related to the Company’s 2025 earnings guidance. The Company is cooperating with these investigations.

In connection with the Company’s processing of electronic payments transactions, which are separate and distinct from the settlement payment transactions described in Note 1, funds received from subscribers are invested from the time the Company collects the funds until payments are made to the applicable recipients. These subscriber funds are invested in short-term, highly liquid investments. Subscriber funds, which are not included in the Company’s consolidated balance sheets, can fluctuate significantly based on consumer bill payment and debit card activity and totaled $1.3 billion and $1.7 billion at June 30, 2026 and December 31, 2025, respectively.

The Company may indemnify its clients from certain costs resulting from claims of patent, copyright or trademark infringement associated with its clients’ use of the Company’s products or services. The Company may also warrant to clients that its products and services will operate in accordance with identified specifications. From time to time, in connection with sales of businesses, the Company agrees to indemnify the buyers of such businesses for liabilities associated with the businesses that are sold. Payments, net of recoveries, under such indemnification or warranty provisions were not material to the Company’s consolidated financial statements.