Second Quarter of 2015 Earnings Release and Conference Call of Ecopetrol S.A.

Ecopetrol S.A. (NYSE:EC; BVC: ECOPETROL; TSX: ECP), will release on August 5th, 2015, after markets close, its results for the second quarter of 2015. Further, on Thursday, August 6th, Ecopetrol's senior management will host two conference calls to review the results:

Conference Call

Spanish English

08:00 a.m. Bogota 9:30 a.m. Bogota

09:00 a.m. New York / Toronto (EDT) 10:30 a.m. New York / Toronto (EDT)

US Dial In #: 844 452 6829 US Dial In #: 844 452 6829

International Dial In #: 760 666 3613 International Dial In #: 760 666 3613

Local Colombia Dial In #: 01800 913 0176 Local Colombia Dial In #: 01800 913 0176

Passcode: 85040318 Passcode: 85037844

The earnings release, slide presentation and live webcast of the conference calls will be available on

Ecopetrol's website: www.ecopetrol.com.coand at the following links:

http://edge.media-server.com/m/p/3j8v2bgf(Spanish)

http://edge.media-server.com/m/p/stwapynx(English)

Please verify in advance proper operation of the webcast in your browser. We recommend the usage of the latest versions of Internet Explorer, Google Chrome y Mozilla Firefox.

The replay of the calls will be available on Ecopetrol's website since August 13th (www.ecopetrol.com.co).

Bogota D.C., July 30, 2015 ------------------------------------------

Ecopetrol is the largest company in Colombia and is an integrated oil and gas company; it is among the top 40 oil companies in the world and among the top four oil companies 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) and Angola. Ecopetrol owns the largest refinery in Colombia, 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 and gas, our exploration and production activities, market conditions, applicable regulations, the exchange rate, Ecopetrol'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.

Contacts: Head of Corporate Finance and Investor Relations (A)

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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