Core Viewpoint - Ecopetrol S.A. is facing a proposed tax adjustment and penalty from the Colombian Tax and Customs Authority (DIAN) amounting to COP 1.2 trillion, plus estimated interest of COP 0.5 trillion, related to VAT on diesel fuel imports from 2022 to 2024 [1][2]. Group 1: Tax and Customs Issues - On June 3, 2025, DIAN notified Ecopetrol of Special Customs Requirement No. 525, indicating its intention to issue an official adjustment assessment related to VAT on diesel fuel imports [1]. - Ecopetrol formally opposed the proposed tax adjustment and penalty in its response submitted on July 1, 2025, highlighting differing legal interpretations between DIAN and the Company [2]. - Since January 2025, Ecopetrol has been making VAT payments on diesel and gasoline imports at a 19% rate, which does not affect its right to challenge DIAN's interpretation [3]. Group 2: Company Overview - Ecopetrol is the largest company in Colombia and a major integrated energy company in the Americas, employing over 19,000 people [5]. - The Company is responsible for more than 60% of Colombia's hydrocarbon production and holds leading positions in petrochemicals and gas distribution [5]. - Ecopetrol has expanded its operations internationally, with drilling and exploration activities in the United States, Brazil, and Mexico, and holds significant positions in power transmission in Brazil, Chile, Peru, and Bolivia [5].