6-K

UNITED STATES 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 March, 2025

Commission File Number: 001-38262

_______________

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)

_______________

_______________

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.

notificacionhrconvocator

City of Buenos Aires, March 6, 2025 Messrs. Comisión Nacional de Valores (National Securities Commission) Messrs. Bolsas y Mercados Argentinos S.A. (BYMA) (Buenos Aires Stock Exchange) Messrs. Mercado Abierto Electrónico S.A. (MAE) S / D Ref.: LOMA NEGRA C.I.A.S.A. - Call for Ordinary General Shareholders’ Meeting to be held on April 23rd, 2025 – Approval of Sustainability Report for the period 2024 Dear Sirs, We are writing to you in order to comply with the provisions of subparagraph a) of Section 4 of Chapter II, Title II of the Rules of the National Securities Commission (T.O. 2013). In this regard, we inform that the Board of Directors of the Company decided at its meeting held on March 6, 2025 to convene an Ordinary General Shareholders’ Meeting to be held on April 23rd, 2025 at 10:00 a.m. on the first call and at 12:00 p.m. on second call, remotely from the corporate headquarters located at Cecilia Grierson 355, 4th floor of the City of Buenos Aires, allowing the shareholders or their representatives and other participants to participate in person or remotely. Also, we hereby inform that the Board of Directors of the Company today has approved the publication of the fourth Sustainability Report for the period 2024, which can be accessed at https://www.lomanegra.com/sostenibilidad/. Sincerely, ____________________ Marcos I. Gradin Investor Relations Officer LOMA NEGRA C.I.A.S.A.