Exhibit 99.1

Calle La Colonia N° 150

Urb. El Vivero - Santiago de Surco

Tel: 317-6000

Lima, April 6, 2026

Sirs

Superintendencia del Mercado de Valores – SMV

Lima.-

Dear Sirs:

By means of the present, and within the framework of the provisions of the Regulations on Material Events and Reserved Information, approved by SMV Resolution No. 005-2014-SMV/01, we hereby report as a Material Event that, in a Board of Directors meeting held on April 6, 2026, the appointment of the members of the Board Committees was unanimously agreed upon, which shall be composed as follows:

Executive Committee:

Simon Rolf Kronenberg (Chairman)

José Raimundo Morales Dasso

Humberto Reynaldo Nadal Del Carpio

Audit Committee:

Esteban Chong León (Chairman)

Ana María Botella Serrano

Venkat Krishnamurthy

Good Corporate Governance Committee:

Santiago María Ojea Quintana (Chairman)

José Raimundo Morales Dasso

Humberto Reynaldo Nadal Del Carpio

Antitrust Best Practices Committee:

Santiago María Ojea Quintana (Chairman)

José Raimundo Morales Dasso

Humberto Reynaldo Nadal Del Carpio

Sustainability Committee:

Ana María Botella Serrano (Chairman)

Santiago María Ojea Quintana

Humberto Reynaldo Nadal Del Carpio

With nothing further to add, we remain yours truly.

Sincerely,

CEMENTOS PACASMAYO S.A.A.

Diego Roda Lynch

Stock Market Representative

CEMENTOS PACASMAYO SAA 6-K