X0202 SCHEDULE 13D/A 0001104659-26-039944 0002016373 XXXXXXXX LIVE 1 Common Shares, par value S/1.00 per share 06/15/2026 false 0001221029 15126Q109 CEMENTOS PACASMAYO SAA

Calle La Colonia 150 Urbanizacion El Vivero Surco Lima R5 00000

Paul K. Humphreys, Esq. (212) 277-4000 Freshfields US LLP, 3 World Trade Center 175 Greenwich Street New York NY 10007 Michael A. Levitt, Esq. (212) 277-4000 Freshfields US LLP, 3 World Trade Center 175 Greenwich Street New York NY 10007 Jeremy Barr, Esq. (212) 277-4000 Freshfields US LLP, 3 World Trade Center 175 Greenwich Street New York NY 10007 Y Inversiones ASPI S.A. b AF N R5 211985547.00 0.00 211985547.00 0.00 211985547.00 N 50.01 CO All calculations of percentage ownership in this Schedule 13D with respect to the Reporting Persons are based upon a total of 423,868,449 common shares, par value S/1.00 per share (the "Common Shares"), of Cementos Pacasmayo S.A.A., a publicly held corporation (sociedad anonima abierta) organized under the laws of Peru (the "Company"), outstanding as of June 16, 2026, as disclosed on the Company's website on such date. 0002016373 N Holcim Ltd. b WC N V8 211985547.00 0.00 211985547.00 0.00 211985547.00 N 50.01 CO HC All calculations of percentage ownership in this Schedule 13D with respect to the Reporting Persons are based upon a total of 423,868,449 Common Shares of the Company outstanding as of June 16, 2026, as disclosed on the Company's website on such date. Common Shares, par value S/1.00 per share CEMENTOS PACASMAYO SAA Calle La Colonia 150 Urbanizacion El Vivero Surco Lima R5 00000 This Amendment No. 1 ("Amendment No. 1") supplements and amends the Schedule 13D filed on April 4, 2026 (the "Original Schedule 13D") which relates to the Common Shares of the Company. Unless specifically amended hereby, the disclosures set forth in the Original Schedule 13D remain unchanged. Capitalized terms used but not otherwise defined herein have the meanings given to them in the Original Schedule 13D. Item 4 of the Original Schedule 13D is hereby amended by adding the following sentence to the end of the third paragraph under the heading "Share Purchase Agreement": On June 15, 2026, Holcim's Executive Committee determined that the Public Tender Offer would be made for any and all of the issued and outstanding Common Shares. Inversiones ASPI S.A. /s/ Sara Jimenez Fandino 06/17/2026 /s/ Norberto German Ledea 06/17/2026 Holcim Ltd. /s/ Grant Earnshaw 06/17/2026 /s/ Lukas Studer 06/17/2026