UUC v. Repsol-YPF: the Supreme Court Ruling and Antitrust Damages in Argentina

The case and the holding

On 29 October 2026 the Argentine Supreme Court (CSJN) dismissed, for lack of standing of the plaintiff, the only collective follow-on damages action ever brought in Argentina, which had moreover obtained a judgment in its favour at two levels of jurisdiction. It did so twenty-four years after the claim was filed, by referring, “for the sake of brevity”, to the opinion issued by the Attorney General's Office in April 2023.

In 2002 the consumer association Unión de Usuarios y Consumidores claimed the overcharge YPF had applied to LPG in the domestic market between 1993 and 1999. The conduct had been sanctioned as an abuse of dominance by Resolution SICyM 189/99, upheld by the Supreme Court in Fallos: 325:1702. The Federal Court of Appeals of La Plata (Chamber I) granted the claim and set direct damages at ARS 95,775,681 (1993/1997) and ARS 78,050,000 (1997/1999), finding, on the basis of expert evidence, that the overcharge had been passed on in full to final consumers. Since individual restitution was impossible, the first-instance court had ordered the defendant to fund the expansion of the natural gas network in low-income areas.

The opinion, and with it the Court, rests on three grounds:

1. The class is undefined: consumers scattered across the country over seven years, with no characterisation that would allow its members to be identified (Halabi, recital 20; Fallos: 338:1492).

2. There are no homogeneous individual interests: YPF sold in the wholesale market, and LPG reached consumers through bottlers, distributors and retailers with different pricing strategies; moreover, YPF was not the only supplier. This follows Loma Negra (Fallos: 338:40).

3. The remedy does not benefit the class: the gas network works would favour third parties, not those who paid the overcharge.

The Court did not rule on limitation, on the effect of the final administrative sanction, on passing-on or on quantification. Each party was ordered to bear its own costs under Article 55 of Law 24,240 (Consumer Protection Law).

Impact on the damages regime

The ruling consolidates the Loma Negra rule, now for unilateral conduct and an already quantified award: where there are intermediaries between the infringer and the final consumer, a consumer collective action fails the homogeneity test. In practice, this produces, through procedural means, an effect equivalent to Illinois Brick: the indirect purchaser is excluded even where it has been proven to have borne 100% of the overcharge.

The difference from the US model is decisive. There, the exclusion of indirect purchasers is offset by the direct purchaser's full standing to recover the entire overcharge, plus treble damages. Here, the direct purchaser (the bottler) may sue, but the expert evidence itself states that it passed everything on, which exposes its claim to a passing-on defence. The likely outcome is that nobody recovers and the infringer keeps a rent of roughly ARS 174 million in 1990s pesos.

The practical impact goes beyond that of an isolated precedent:

• On collective redress: in markets with a distribution chain (fuels, inputs, food, pharmaceuticals), which account for most cartel and abuse cases, consumer actions are effectively closed off.

• On deterrence: private enforcement ceases to complement administrative fines precisely where harm is most dispersed and individual actions are unviable.

• On Law 27,442: the case was decided under Laws 22,262 and 25,156, but the criterion is procedural and constitutional (Art. 43 of the National Constitution and Halabi), so it extends to the current regime. The current law has resolved much of what was litigated in UUC: the Tribunal's final decision is res judicata, and the civil judge must base the ruling on the facts and legal characterisation established in it (Art. 63); damages actions are time-barred after three years, or two years from the sanction becoming final (Art. 72), and limitation is suspended during the administrative proceedings (Art. 73). What it did not resolve is who may bring collective claims, since Article 62 refers to the general law. The ruling fills that gap restrictively, even though Article 65 recognises “direct and indirect” purchasers as injured parties.

Positive aspects

The ruling has real merits, particularly in upholding the compensatory nature of the action.

• Compensation is not redistribution. Rejecting an award that funds gas works for third parties reaffirms that damage must be compensated to those who suffered it. A cy-près remedy detached from the class turns a damages action into public policy decided by a judge.

• Requirement of class definition. Requiring the class to be identifiable from the outset protects the defendant's due process and delimits the scope of res judicata, in line with Halabi and subsequent case law (Fallos: 339:1077; 343:637).

• Risk of double recovery. Taking the distribution chain into account prevents the same overcharge from being recovered twice: by the bottler in its individual action and by consumers in the collective one.

• Each party bears its own costs. Applying Article 55 of Law 24,240 prevents the defeat from deterring the associations that bring these actions.

• No res judicata on the merits. Since the dismissal rests on standing, it should not bar individual claims, although at this stage limitation makes them illusory.

What could have been decided better

The central problem is that the Court decided an admissibility issue at the end of the proceedings, without reasons of its own, and conflated standing with the merits.

1. Referral in a 24-year case. Referring “for the sake of brevity” to a 2023 opinion in the country's most significant antitrust damages case is a missed opportunity. No guidance was given on limitation (Art. 54 of Law 25,156 versus the two-year term; now Arts. 72 and 73 of Law 27,442 for new cases), on the dies a quo, on the effect of the final administrative sanction, on passing-on or on quantification.

2. The timing of the review. The opinion itself states that the class must be verified “at the initial stage of the proceedings”. Declaring it undefined after economic and accounting expert reports and two judgments is wasteful, and shifts onto the victims a failure that belongs to the procedural system. The reasonable alternative was to allow the class definition to be redrawn or, at least, to confine the dismissal to the remedy.

3. The class was definable. “Consumers who purchased bottled LPG in Argentina between 1993 and 1999” is an objective and verifiable criterion. Requiring its members to be identifiable in advance is excessive for mass, low-value harm, which is precisely the scenario in which Halabi admits collective redress on access-to-justice grounds. The opinion turns the dispersion of the harm against the action, when it is its very justification.

4. Channel heterogeneity and passing-on are merits issues. That intermediaries had different strategies does not preclude a common question: whether there was an overcharge and to what extent it was passed on. The Court of Appeals had answered it on expert evidence (full pass-on); the opinion does not refute that finding, it ignores it. The economics of quantification allow aggregate pass-on to be estimated without reconstructing each purchase.

5. The presence of other suppliers is irrelevant to the class. That YPF was not the only wholesale supplier goes to causation and possible umbrella effects, not to the definition of the class.

6. Outright dismissal for a defect in the remedy. If the cy-près remedy was inappropriate, the proper course was to reverse that part and require a distribution mechanism linked to the class (for instance, a reduction in the price of LPG cylinders or a fund allocated by proximity), not to dismiss the claim.

7. No answer for the direct purchaser. The Court does not say who has standing to recover the overcharge. Excluding the indirect purchaser without securing the direct purchaser's route leaves the conduct uncompensated.

What the system must improve

The case shows that the substantive regime of Law 27,442 is not enough without procedural and evidentiary rules that make it operative.

1. Collective standing and a class actions statute. Article 62 refers to the general law and does not provide for collective redress. It is inconsistent that consumer associations may intervene as third parties in the administrative proceedings (Art. 51) and enter into agreements with the Tribunal (Art. 28(p)), yet lack a clear judicial route. Supreme Court Rules (Acordadas) 32/2014 and 12/2016 are no substitute for a statute providing for early and appealable certification, notice and opt-out, and distribution mechanisms with subsidiary, class-linked cy-près. The standing of the Deputy Ombudsman for Competition and Consumers (Art. 86) should also be considered.

2. Express regulation of passing-on. Article 65 already mentions “direct and indirect” purchasers, albeit only to delimit the liability of the leniency recipient. What is missing is the general rule, along the lines of Articles 12 to 14 of Directive 2014/104/EU: standing for indirect purchasers, a presumption of pass-on in their favour with the burden of proof on the defendant, and a passing-on defence against the direct purchaser.

3. Quantification and evidence. Judicial power to estimate damages where precise proof is impossible or excessively difficult, and a presumption of harm for the cartels listed in Article 2 (Art. 17 of the Directive). In addition, a regime for access to evidence held by the infringer and in the administrative file, compatible with the ban on disclosing leniency materials (Art. 60(d)).

4. Coordination with the ANC. The law already secures the binding effect of the final decision and summary proceedings (Art. 63), as well as the suspension of limitation (Art. 73). What is missing is a provision allowing the Tribunal to assist the civil judge on quantification, reversing the logic of the expert opinions under Article 52, and allowing its estimates of harm for setting the fine (Art. 56) to be considered in the civil action.

5. Delay and specialisation. Twenty-four years for a judgment that does not reach the merits amounts to a denial of justice. The Specialised Chamber (Arts. 68 to 70) reviews the Tribunal's decisions, but damages actions remain before ordinary civil judges (Art. 62). Extending specialisation to these actions would bring consistency and speed.

6. Consistency between direct and indirect purchasers. If indirect purchasers are admitted, a pass-on defence against direct purchasers is justified; if they are excluded, that defence must fall and the direct purchaser must recover the full overcharge (the Hanover Shoe–Illinois Brick pairing). The civil fine under Article 64, set by the judge in favour of the injured party, can strengthen deterrence where individual harm is small.

Conclusion

UUC v. Repsol-YPF leaves a sanctioned infringement, a proven and quantified harm, and no compensation. The ruling is right to reject a remedy unrelated to the victims but, by deciding by referral and at the last stage, it turns the absence of procedural rules into de facto immunity for the infringer.

The answer cannot be left to case-by-case adjudication. A class actions statute and express regulation of passing-on and quantification in Chapter IX of Law 27,442 (Arts. 62 to 65) are preconditions for private enforcement to move from promise to a real component of the competition system.