6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

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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 November, 2024

Commission File Number: 001-38262

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LOMA NEGRA COMPAÑÍA INDUSTRIAL ARGENTINA SOCIEDAD ANÓNIMA (Exact Name of Registrant as Specified in its Charter)

LOMA NEGRA CORPORATION (Translation of Registrant’s name into English)

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

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

This Form 6-K for Loma Negra Compañía Industrial Argentina Sociedad Anónima (or the “Company”) contains:

Exhibit 1:Relevant Event

SIGNATURES

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.

ln-hr19112024eng

City of Buenos Aires, November 19th, 2024 Messrs. Comisión Nacional de Valores (CNV) Messrs. Bolsas y Mercados Argentinos S.A. (BYMA) Messrs. Mercado Abierto Electrónico S.A. (MAE) Ref.: LOMA NEGRA C.I.A.S.A. – Relevant Event Dear Sirs, We are writing in accordance with Section 2 of Chapter I, Title XII of the Argentine National Securities Commission (Comisión Nacional de Valores) Regulations (2013 revised version) following the information communicated before and particularly with respect to the information communicated on September 16, 2024, and September 18, 2024. In this regard, our indirect controlling shareholder, InterCement Participações S.A. (“InterCement”), informed to the market in general that in the context of both, the competitive process organized by Banco BTG Pactual and the non-judicial collection proceeding (recuperação extrajudicial) filed by InterCement and other companies of the group, that InterCement and its controlling shareholder Mover Participações S.A. signed an amendment to the agreement published on September 18, 2024 providing that the exclusivity rights to Companhia Siderúrgica Nacional (CSN) regarding a possible acquisition of shares representing 100% (one hundred percent) of its share capital is extended until December 16, 2024. The amendment to the agreement reflects the automatic extension of the deadline for purposes of concluding the non-judicial collection plan (recuperação extrajudicial). Notwithstanding the foregoing, InterCement has reported that there is no signed document that generates any binding obligation or firm commitment for InterCement or its shareholder Mover Participações S.A and/or any of its subsidiaries in connection with the potential transaction. As disclosed on September 16, 2024, it is important to emphasize that Loma Negra is not part of the non-judicial collection plan (recuperação extrajudicial). Loma Negra will keep its investors and the general market informed and reaffirms its transparency commitment. Sincerely, ______________________ Marcos Isabelino Gradin Investor Relations Officer LOMA NEGRA C.I.A.S.A.