Exhibit 99.1
Free translation into English
COMPAÑIA DE MINAS BUENAVENTURA S.A.A.
Wednesday, April 29, 2026
To:
Superintendencia del Mercado de Valores
MATERIAL EVENT NOTICE: Communication of Changes in the Participation and Positions of Related Parties
In compliance with the provisions of the Material and Reserved Information Regulation, approved by Resolution SMV No. 005-2014-SMV/01, we inform you that:
Type of Governing Body: Board of Directors Meeting
Date of Resolution: April 29, 2026
Description of Material Event: Appointment of Mr. Roque Eduardo Benavides Ganoza as Chairman of the Board of Directors and Mr. Shehzad Bharmal as Lead Director.
Observations: On this date, April 29, 2026, the Board of Directors unanimously resolved to appoint Mr. Roque Eduardo Benavides Ganoza as Chairman of the Board of Directors. Additionally, the Board unanimously resolved to appoint Mr. Shehzad Bharmal as Lead Director.
Related Party Type: BOARD OF DIRECTORS
Type of Change: CHANGE
BOARD OF DIRECTORS: BENAVIDES GANOZA, ROQUE EDUARDO
Position: DIRECTOR
Start Date: March 30, 2026
Independent Director: NO
End Date: April 29, 2026
Related Party Type: BOARD OF DIRECTORS
Type of Change: CHANGE
BOARD OF DIRECTORS: BENAVIDES GANOZA, ROQUE EDUARDO
Position: CHAIRMAN OF THE BOARD OF DIRECTORS
Start Date: April 29, 2026
Independent Director: NO
Related Party Type: BOARD OF DIRECTORS
Type of Change: CHANGE
BOARD OF DIRECTORS: BHARMAL, SHEHZAD
Position: DIRECTOR
Start Date: March 30, 2026
Independent Director: YES
End Date: April 29, 2026
Related Party Type: BOARD OF DIRECTORS
Type of Change: CHANGE
BOARD OF DIRECTORS: BHARMAL, SHEHZAD
Position: Lead Director
Start Date: April 29, 2026
Independent Director: YES
Current Board of Directors Composition
| RELATIONSHIP TYPE | NAME | POSITION |
| BOARD OF DIRECTORS | ARRIAGADA HERRERA, IVAN DAGOBERTO | DIRECTOR |
| BOARD OF DIRECTORS | BENAVIDES GANOZA, RAUL EDUARDO PEDRO | DIRECTOR |
| BOARD OF DIRECTORS | BENAVIDES GANOZA, ROQUE EDUARDO | CHAIRMAN OF THE BOARD OF DIRECTORS |
| BOARD OF DIRECTORS | BERNEX WEISS DE FALEN, NICOLE EDEL LAURE MARIE | DIRECTOR |
| BOARD OF DIRECTORS | BETZHOLD HENZI, JORGE F. | DIRECTOR |
| BOARD OF DIRECTORS | BHARMAL, SHEHZAD | Lead Director |
| BOARD OF DIRECTORS | DE LA TORRE DE LA PIEDRA, DIEGO EDUARDO M. | DIRECTOR |
| BOARD OF DIRECTORS | ORTIZ JARA, MAURICIO | DIRECTOR |
| BOARD OF DIRECTORS | ZALDIVAR GARCIA, MARCO ANTONIO | DIRECTOR |
Respectfully,
PEDRO ANGEL TORRES TORRES
SECURITIES MARKET REPRESENTATIVE
COMPAÑÍA DE MINAS BUENAVENTURA S.A.A.