BOGOTA, Colombia, May 23, 2017 /PRNewswire/ -- Ecopetrol S.A. (BVC: ECOPETROL; NYSE: EC) ("Ecopetrol" or the "Company) announced that it received a notification letter from the New York Stock Exchange (NYSE) on May 17, 2017, stating that as the Company had not filed in due time its Form 20-F for the fiscal year ended December 31, 2016 with the Securities Exchange Commission (SEC), it was not in compliance with the listing criteria of the NYSE. As a result, the procedures set forth in Section 802.01E of the NYSE Listed Company Manual will be applicable.

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On May 17, 2017 the Company issued a press release and filed a Form 6-K before the SEC, detailing that, as part of the Company's due diligence, the Audit Committee of the Board of Directors has retained a U.S.-based outside law firm to commence a third-party investigation into the matters set forth in the announcement made by the Prosecutor's Office on April 27, 2017. In light of this announcement, the Company's auditor for 2014-2015 has said it is not ready to consent to the use of its opinion in connection with the filing of the Form 20-F, and accordingly will continue to monitor the progress of the third-party investigation.

The Company's management is committed to file its annual report on Form 20-F and be again in compliance with applicable listing rules as soon as possible.

Ecopetrol is the largest company in Colombia and is an integrated oil & gas company; it is among the top 50 oil companies in the world and among the four top ones in Latin America. Besides Colombia - where it generates over 60% of the national production - it has exploration and production activities in Brazil, Peru & the US (Gulf of Mexico). Ecopetrol owns the largest refinery in Colombia and most of the pipeline and multi-product pipeline network in the country, and is significantly increasing its participation in bio-fuels.

This release contains statements that may be considered forward looking statements within the meaning of Section 27A of the U.S. Securities Act of 1933 and Section 21E of the U.S. Securities Exchange Act of 1934. All forward-looking statements, whether made in this release or in future filings or press releases or orally, address matters that involve risks and uncertainties, including in respect of the Company's prospects for growth and 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 of oil & gas, our exploration and production activities, market conditions, applicable regulations, the exchange rate, the Company's competitiveness and the performance of Colombia's economy and industry, to mention a few. We do not intend, and do not assume any obligation to update these forward-looking statements.

For further information, please contact:

Head of Corporate Finance and Investor Relations
María Catalina Escobar
Phone: (+571) 234 5190
E-mail: investors@ecopetrol.com.co

Media Relations (Colombia)
Jorge Mauricio Tellez
Phone: + 571-234-4329
Fax: +571-234-4480
E-mail: mauricio.tellez@ecopetrol.com.co

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SOURCE Ecopetrol S.A.