A Thirteen-Year Antitrust Case Is Closing in Pieces. Chicago Is Next.

On Wednesday April 16, US District Judge Alvin Hellerstein formally closed the Southern District of New York interchange litigation after the final settlement from Alimentation Couche-Tard, Circle K's parent company. Payments Dive reported that the closure covers approximately 65 merchants who had pursued claims since the original 2013 complaint.

The list of retailers in the final settlements includes Amtrak, Crate & Barrel, Dick's Sporting Goods, Nike, and Circle K. Per Visa's regulatory filings, the company paid $4.2 billion in settlement payments between October 1, 2023 and March 31, 2026 from its litigation escrow account. Baird Equity Research estimated that Visa has now settled claims covering more than 90 percent of its payments volume.

A 13-year case did not end in a single ruling. It ended transaction by transaction, retailer by retailer, over 30 months of settlement activity.

The Case Background

The original complaint, filed in June 2013, argued that Visa, Mastercard, and their member banks had coordinated to set interchange fees, violating antitrust law. The class-action framework covered roughly 12 million merchants nationally. The number of merchants that eventually pursued damages was a fraction of that total. Most merchants accepted the class settlement terms. A subset, including the 65 that settled this month, opted out and pursued individual claims.

The individual-opt-out approach worked for the retailers who had the legal resources to sustain a multi-year case. For the networks, it created an alternative to a single large class verdict: resolve claims one retailer at a time, at negotiated terms, without the risk exposure of an aggregated trial outcome.

That strategy has now largely concluded in the Southern District of New York. Whether it extends to the parallel Chicago case, which is scheduled for trial September 14 and involves approximately 28 plaintiffs including GrubHub Holdings, is the next open question.

What the Numbers Mean

Visa's $4.2 billion in settlements across 30 months is a large number. It is also a number that the company had provisioned for. Card networks run litigation escrow accounts specifically to absorb interchange-related settlements without disrupting ongoing operations or quarterly earnings. The settlement activity was expected, budgeted, and telegraphed to investors well in advance.

Baird's estimate that Visa has now settled claims covering more than 90 percent of its payments volume is the more structurally interesting data point. It implies that the remaining unsettled exposure, while still meaningful, represents a small share of the case universe. For Visa, the New York phase is mostly behind it. Mastercard has followed a similar settlement cadence, with its own escrow-backed resolution of opt-out claims proceeding in parallel.

For merchants, the settlements closed a revenue question. For the networks, they closed an accounting question. The broader question, how interchange is set and for whom, was not resolved by the settlements. It was resolved by the settlements not being litigated at full trial.

Why This Matters Now

The merchant interchange dispute has been a fixture of US payments policy for 15 years. The 2013 case was one of several running in parallel. The Durbin Amendment to Dodd-Frank had already reshaped debit interchange before the 2013 case was filed. The European Interchange Fee Regulation capped cross-border fees in the EU in 2015. The UK ran its own interchange settlements through the CMA in parallel.

What closes with the Hellerstein ruling is not the interchange question. It is one specific case in one specific jurisdiction. The policy debate about interchange levels, the merchant coalition advocacy, the periodic congressional hearings on the Credit Card Competition Act all continue.

What does change, materially, is the risk profile for the networks going forward. A closed case removes a category of litigation overhang. Analysts who had been modeling contingent liabilities around the New York case can remove them. That affects valuation in ways that are small per quarter but cumulative over time.

The Chicago Test

The September 14 Chicago trial is the next scheduled test of the pattern. Roughly 28 plaintiffs, including GrubHub Holdings, are in settlement discussions or heading to trial on similar claims.

Three outcomes are possible.

Pattern continues. The Chicago plaintiffs settle before trial, on terms similar to the New York retailers. The networks' escrow-based resolution strategy concludes the major individual-opt-out litigation. This is the base case given the New York precedent.

Trial proceeds to verdict. If settlement talks break down, a full antitrust trial in Chicago would be the first major interchange case decided on the merits in years. The outcome would set an evidentiary precedent either direction.

Mixed outcome. Some plaintiffs settle, others proceed to trial. The most likely case by historical pattern, since the economics differ plaintiff by plaintiff.

The networks prefer the first outcome. Most merchants prefer the first outcome. The plaintiffs' bar, which has invested in trial preparation, has a mixed incentive. The base case is that the Chicago case follows the New York pattern, closes through settlement, and the 13-year litigation cycle ends in 2026 rather than extending further.

The Broader Payments Context

What does not change with these settlements is the underlying economics of card acceptance. Interchange fees continue to be set by the networks, continue to differ by card type, and continue to be one of the most contested elements of the payments value chain.

The merchants that joined the 2013 case did so largely because they believed interchange was set too high. The settlements resolved their specific claims. They did not change the mechanism by which interchange is set for future transactions.

That is the part worth watching as agentic commerce volume grows. New agent-initiated payment flows are still being classified, priced, and integrated into the interchange structure. If a significant share of transactions shifts from consumer card-present to agent card-not-present, interchange classification will matter more than a 13-year settlement did. That is the next conversation.

What To Watch

Three signals in the next six months.

First, whether the Chicago case settles before the September 14 trial date. Settlement would close the major individual-opt-out exposure. A trial would introduce new evidentiary risk.

Second, whether the Credit Card Competition Act gains traction in the current Congress. The legislation would require large banks to enable at least one network alternative on credit cards. That is a structurally larger question than any individual merchant case.

Third, how agent-initiated transactions are classified for interchange. The networks have been quietly updating merchant category and transaction type frameworks to accommodate agent-initiated flows. The pricing decisions made over the next 12 months will matter more to the overall interchange economics than the settlement payments currently closing out the 2013 case.

A case that ran 13 years closed retailer by retailer. Does Chicago end the cycle, or extend it?

Charlie Major is a Product Development Manager at Mastercard. The views and opinions expressed in Major Matters are his own and do not represent those of Mastercard.