Exhibit 99.1

Calle La Colonia N° 150,

Urb. El Vivero - Santiago de Surco

Telf: 317-6000

Lima, November 4, 2026

Sirs

Superintendencia del Mercado De Valores – SMV

Lima.-

Pursuant to Article 30 of the Consolidated Text of the Securities Market Law and the Regulations on Material Events and Reserved Information, approved by SMV Resolution No. 005-2014-SMV/01, we hereby report the following:

Today, we became aware of the publication in the Official Gazette “El Peruano” and the newspaper “La República” of the notice of the Tender Offer launched by Inversiones Aspi S.A. for the shares representing the share capital of Cementos Pacasmayo S.A.A.

Copies of the aforementioned publications are attached as an Annex to this communication.

Sincerely,

Without further business, we remain yours truly.

Sincerely,

CEMENTOS PACASMAYO S.A.A.

José Félix Villafuerte Mendoza

Representante Bursátil