SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13A-16 OR 15D-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of January 2026

Commission File Number: 001-12102

YPF Sociedad Anónima

(Exact name of registrant as specified in its charter)

Macacha Güemes 515

C1106BKK Buenos Aires, Argentina

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F ☒ Form 40-F ☐

YPF Sociedad Anónima

TABLE OF CONTENT

ITEM 1

Translation of letter to the Argentine Securities Commission (Comisión Nacional de Valores) dated January 22, 2026.

LOGO

Buenos Aires, January 22, 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.: Changes in the Board of Directors of YPF S.A.

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 in relation with the Material Event filed on December 11, 2025, regarding the resignation of Class D Regular Director, Mrs. Marilina Jaramillo.

Furthermore, we hereby inform that, at its meeting held on January 22, 2026, the Class D Supervisory Committee appointed Mr. José Daniel Álvarez as Regular Director for Class D shares, replacing Ms. Jaramillo, with a term of office until the election of new directors by the Shareholders’ Meeting.

Sincerely,

Margarita Chun

Market Relations Officer

YPF S.A.

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

YPF Sociedad Anónima

Date: January, 22, 2026

/s/ Margarita Chun

Margarita Chun

Market Relations Officer

YPF SOCIEDAD ANONIMA 6-K