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 October, 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.

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City of Buenos Aires, October 31, 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 order to comply with Articles 8°, Section II, Chapter III, Title II, and 3°, paragraph 3), Section II, Chapter I, Title XII of the Argentine National Securities Commission (Comisión Nacional de Valores) Rules (2013 revised version). In this regard, we hereby inform that today LOMA NEGRA C.I.A.S.A. (the “Company”) received the communications submitted by Messrs. (i) Carlos Boero Hughes resigning from his position as director of the Company, and (ii) Livio Hagime Kuze resigning from his position as a director of the Company. These resignations will be considered by the next Board of Directors' Meeting of the Company and they will be effective upon the Board's acceptance. Additionally, it is hereby inform that the resignations have not implied any intentional misconduct nor have been untimely filed, and do not affect the quorum of the Company's Board of Directors. Sincerely, Marcos I. Gradin Investor Relations Officer LOMA NEGRA C.I.A.S.A.