City of Buenos Aires, September 19, 2025
COMISIÓN NACIONAL DE VALORES (“CNV”)
25 de Mayo 175
City of Buenos Aires
BOLSAS Y MERCADOS ARGENTINOS S.A. (“ByMA”)
Sarmiento 299
City of Buenos Aires
A3 MERCADOS S.A. (“A3 Mercados”)
Maipu 1210
City of Buenos Aires
Present
Ref.: Relevant Fact – Judicial Proceeding in New York
Dear Ladies and Gentleman,
The purpose hereof is to comply with the requirements set forth in Article 2, Chapter I, Title XII of the Rules of the CNV (T.O. 2013, as amended and supplemented), and the corresponding ByMA and A3 rules.
On September 17, 2025, the United States District Court for the Southern District of New York (the “District Court”) issued a memorandum and order (the “Order”) in the proceedings brought by Petersen Energía Inversora S.A.U., Petersen Energía S.A.U., Eton Park Capital Management, L.P., Eton Park Master Fund, LTD. and Eton Park Fund, L.P. (collectively, “Plaintiffs”) against the Argentine Republic (the “Republic”) and YPF S.A. (“YPF”), which are currently pending on appeal in the United States Court of Appeals for the Second Circuit.
As disclosed in our financial statements, on August 12, 2024, YPF filed a brief requesting that the District Court permanently enjoin Plaintiffs from pursuing recovery from YPF in connection with their September 15, 2023 final judgment against the Republic, arguing that Plaintiffs’ alter ego theory is barred under the doctrine of res judicata. In its Order, amongst other things, the District Court denied YPF’s request to enjoin Plaintiffs and ordered Plaintiffs and YPF to continue with the discovery process. The District Court’s decision does not decide the question of whether YPF is an alter ego of the Republic, which YPF strongly denies. YPF will continue to defend itself in accordance with all applicable legal procedures and available defenses.
Yours faithfully,
Margarita Chun
Market Relations Officer
YPF S.A.