6-K

UNITED STATES

  SECURITIES AND EXCHANGE COMMISSION

  Washington, D.C. 20549

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FORM 6‑K

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REPORT OF FOREIGN PRIVATE ISSUER

Pursuant to Rule 13a-16 or 15d-16 under the

Securities Exchange Act of 1934

For the month of December, 2022

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):   ☐

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.

City of Buenos Aires, December 22, 2022

Messrs.

Comisión Nacional de Valores (CNV)

Bolsas y Mercados Argentinos S.A. (BYMA)

Ref.: Loma Negra C.I.A.S.A. - Relevant Event

Dear Sirs:

We are writing in order to comply with section 2, Chapter I, Title XII of the Argentine securities regulator (Comisión Nacional de Valores) Rules (2013 revised version).

In this sense, we inform that by resolution of the Board of Directors of Loma Negra C.I.A.S.A. of December 21, 2022 it was approved to renew the amounts of all of the guarantees granted in favor of the banks with which its subsidiary Ferrosur Roca S.A. (“Ferrosur”) operates and, except in the case of Banco Santander Rio S.A. whose amount will remain the same, to increase the amount thereof, and to obtain a new line of credit with Banco de Galicia y Buenos Aires S.A.U. This, in order to guarantee the lines of bank´s overdraft that could be taken by Ferrosur in the ordinary course of its business and letters of credit to finance imports or exports in USD (U.S. dollars) and EUR (euros), all for up to a maximum amount of AR$ 2,100 million.

The guarantees will be granted to the extent that Ferrosur effectively takes overdrafts or requests letters of credit with the banks, and for the amounts actually taken in each case up to the maximum limit approved as above mentioned. Each new guaranty will be granted for a period of one year from its granting.

Sincerely,

Marcos I. Gradin

Investor Relations Officer

LOMA NEGRA C.I.A.S.A.