YPF 回购 Class XXVII 债券，金额约合面值 437.5 万美元

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 October 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 dated October 5, 2026.

Buenos Aires, October 5, 2026

COMISION NACIONAL DE VALORES

25 de Mayo 175

Buenos Aires

BOLSAS Y MERCADOS ARGENTINOS S.A. (“ByMA”)

Sarmiento 299

Buenos Aires

A3 Mercados S.A. (“A3 Mercados”)

Maipu 1210

Buenos Aires

Ref.: Relevant Information – Report on Repurchase of Notes.

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

We hereby inform that between September 28 and October 2, 2026, YPF S.A. (the “Company”) repurchased Class XXVII Notes (YMCTO) for a total amount of Ps. 6,660,251,170.56 (six billion six hundred sixty million two hundred fifty-one thousand one hundred seventy pesos and 56/100), equivalent to a par value of US$ 4,374,760, which will be held in portfolio.

The Class XXVII Notes were issued by the Company in October 2023 for a nominal value of US$ 127,904,997 under the Company’s Frequent Issuer framework, with maturity in October 2026.

The repurchase was made at an average price equivalent to 99.91% of their nominal value.

Sincerely,

Margarita Chun

Markets 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.