Buenos Aires, February 2, 2026
COMISIÓN NACIONAL DE VALORES (“CNV”)
25 de Mayo 175
Buenos Aires
BOLSAS Y MERCADOS ARGENTINOS S.A. (“ByMA”)
Sarmiento 299
Buenos Aires
A3 MERCADOS S.A. (“A3 Mercados”)
Maipú 1210
Buenos Aires
Ref.: Vista Energy Agreements - Bandurria Sur, Bajo del Toro and Bajo del Toro Norte.
Ladies and Gentlemen,
We are writing to you in order to comply with the CNV Rules and the corresponding regulations of ByMA and A3 Mercados.
To that end, we report that, on February 1, 2026, YPF entered into a share purchase agreement (hereinafter, the “Agreement”) with Vista Energy, S.A.B. de C.V., whereby, subject to the fulfilment of the conditions precedent set forth therein, YPF will acquire 16.3% of the shares and share capital of Equinor Argentina S.A.U. (or under such other name as it may hereafter adopt). Equinor Argentina S.A.U. owns 30% of the Bandurria Sur block.
Additionally, on the same date, YPF entered into an asset purchase agreement to acquire from Vista Energy S.A.B. de C.V. a 15% working interest in the “Bajo del Toro” and “Bajo del Toro Norte” blocks.
The aggregate price for both transactions amounts to US$163,175,000, plus a closing price adjustment and a contingent price.
If all the conditions precedent to closing are met, YPF will acquire: (i) indirectly, through the aforementioned 16.3% of the shares of Equinor Argentina S.A.U., a 4.9% working interest in the “Bandurria Sur” block, which, added to its current direct interest, will total 44.9% in that block; and (ii) a 15% working interest in the “Bajo del Toro” and “Bajo del Toro Norte” blocks, which, added to its current stake, will total 65% in those blocks.
We report that, immediately prior to the transactions described above, Vista Energy acquired from Equinor 100% of the shares and share capital of Equinor Argentina S.A.U., and a 50% working interest in the “Bajo del Toro” and “Bajo del Toro Norte” blocks.
Below are the most relevant operating data of the blocks that form part of the agreement:
On the one hand, Bandurria Sur is an unconventional hydrocarbon exploitation concession (“CENCH”) awarded in 2015 for a 35-year term and is operated by YPF. It covers 56.2 thousand acres of the Vaca Muerta formation and, during the third quarter of 2025 (“3Q25”), on a 100% basis, produced 84.9 thousand barrels of oil equivalent per day (79% shale oil).
On the other hand, Bajo del Toro Norte is also a CENCH awarded in 2021 for a 35-year term and operated by YPF. It covers 28.1 thousand acres and reached, in 3Q25, on a 100% basis, production of 3.6 thousand barrels of oil equivalent per day (100% shale oil); while Bajo del Toro corresponds to an unconventional hydrocarbon exploration permit with an area of 10.6 thousand acres.
Sincerely,
Margarita Chun
Market Relations Officer
YPF S.A.