Exhibit 99.1

Calle La Colonia N° 150,

Urb. El Vivero - Santiago de Surco

Telf: 317-6000

Lima, October 23, 2026

Sirs

Superintendencia del Mercado De Valores – SMV

Lima.-

Reference: Material Event

In accordance with 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,

CEMENTOS PACASMAYO S.A.A.

José Félix Villafuerte Mendoza

Stock Exchange Representative

Calle La Colonia N° 150,

Urb. El Vivero - Santiago de Surco

Telf: 317-6000

●

Notice Published in the Official Gazette “El Peruano”

Calle La Colonia N° 150,

Urb. El Vivero - Santiago de Surco

Telf: 317-6000

●

Notice Published in the Newspaper “La República”