6-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of January, 2025

Commission File Number 001-34175

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F x      Form 40-F ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1)

Yes ¨      No x

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7)

Yes ¨      No x

Indicate by check mark whether the registrant by furnishing the information contained in this form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ¨      No x

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- N/A

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: January 30, 2025

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Ecopetrol S.A. submitted the Report on the Implementationof

Best Corporate Practices – “CódigoPaís” for FY2024

Ecopetrol S.A. (BVC: ECOPETROL; NYSE: EC), submitted today the Report on the Implementation of Best Corporate Practices – “Código País” - to the Financial Superintendency of Colombia. The report describes the corporate governance practices adopted and implemented by the company between January 1, 2024 and December 31, 2024. The Código Pais Survey was digitally signed by the Legal Representative.

For more information, please consult the report at the following link:

https://www.ecopetrol.com.co/wps/portal/Home/es/ResponsabilidadEtiqueta/Gobernabilidad/ResCorpMediciones/

Likewise, you may consult the report on the website of the Financial Superintendence of Colombia through the following link:

https://www.superfinanciera.gov.co/publicacion/10085968. Access route: Generate Report to File/2023/Public Entities/ Ecopetrol S.A.

Bogota D.C., January 30, 2025

Ecopetrol is the largest company in Colombia andone of the main integrated energy companies in the American continent, with more than 18,000 employees. In Colombia, it is responsiblefor more than 60% of the hydrocarbon production of most transportation, logistics, and hydrocarbon refining systems, and it holds leadingpositions in the petrochemicals and gas distribution segments. With the acquisition of 51.4% of ISA’s shares, the company participatesin energy transmission, the management of real-time systems (XM), and the Barranquilla - Cartagena coastal highway concession. At theinternational level, Ecopetrol has a stake in strategic basins in the American continent, with Drilling and Exploration operations inthe United States (Permian basin and the Gulf of Mexico), Brazil, and Mexico, and, through ISA and its subsidiaries, Ecopetrol holds leadingpositions in the power transmission business in Brazil, Chile, Peru, and Bolivia, road concessions in Chile, and the telecommunicationssector. This press release contains business prospect statements, operating and financial result estimates, and statements related toEcopetrol's growth prospects. These are all projections and, as such, they are based solely on the expectations of the managers regardingthe future of the company and their continued access to capital to finance the company's business plan. The realization of said estimatesin the future depends on the behavior of market conditions, regulations, competition, and the performance of the Colombian economy andthe industry, among other factors, and are consequently subject to change without prior notice.

This release contains statements that may be consideredforward-looking statements within the meaning of Section 27A of the U.S. Securities Act of 1933, as amended, and Section 21E of the U.S.Securities Exchange Act of 1934, as amended. All forward-looking statements, whether made in this release or in future filings or pressreleases, or orally, address matters that involve risks and uncertainties, including in respect of the Company’s prospects for growthand its ongoing access to capital to fund the Company’s business plan, among others. Consequently, changes in the following factors,among others, could cause actual results to differ materially from those included in the forward-looking statements: market prices ofoil & gas, our exploration, and production activities, market conditions, applicable regulations, the exchange rate, the Company’scompetitiveness and the performance of Colombia’s economy and industry, to mention a few. We do not intend and do not assume anyobligation to update these forward-looking statements.

For more information, please contact:

Head of Capital Markets (A)

Cristhian Vicente Prado Castillo

Email: investors@ecopetrol.com.co

Head of Corporate Communications (Colombia)

Marcela Ulloa

Email: marcela.ulloa@ecopetrol.com.co