Ecopetrol S.A. Announces Delivery and NYSE Listing of its Registered 7.625% Notes Due 2019

BOGOTA, Oct. 7 /PRNewswire-FirstCall/ — Ecopetrol S.A. (NYSE: EC), a
Colombian mixed economy company (the “Company”), announced that following the
October 2, 2009 expiration of the Company’s offer to exchange its registered
7.625% Notes due 2019 (the “New Notes”) for up to U.S.$1,500,000,000 aggregate
principal amount of its unregistered 7.625% Notes due 2019 (the “Old Notes”),
upon the terms and subject to the conditions described in the prospectus dated
September 3, 2009 (the “Prospectus”), the Company today issued
U.S.$1,492,541,000 aggregate principal amount of New Notes and cancelled
U.S.$1,492,541,000 aggregate principal amount of the Old Notes. In addition,
the New Notes began trading on the New York Stock Exchange today under the
symbol “EC19″.

(Logo: http://www.newscom.com/cgi-bin/prnh/20090209/ARM001LOGO )

Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of the New Notes, nor have they
determined if the Prospectus is truthful or complete. Any representation to
the contrary is a criminal offense.

Ecopetrol is Colombia’s largest integrated oil company and is among the
top 40 oil companies in the world and the four largest oil companies in Latin
America. Besides Colombia, where it accounts for 60% of total production, the
Company is involved in exploration and production activities in Brazil, Peru
and the United States (Gulf of Mexico). Ecopetrol has the principal refinery
in Colombia, most of the network of oil and multiple purpose pipelines in the
country, and it is considerably increasing its participation in biofuels.

This release contains forward-looking statements relating to the prospects
of the business, estimates for operating and financial results, and those
related to growth prospects of Ecopetrol. These are merely projections and, as
such, are based exclusively on the expectations of management concerning the
future of the business and its continued access to capital to fund the
Company’s business plan. Such forward-looking statements depend,
substantially, on changes in market conditions, government regulations,
competitive pressures, the performance of the Colombian economy and the
industry, among other factors; therefore, they are subject to change without
prior notice.

    Contact us for any additional information:

    Investor Relations
    Alejandro Giraldo
    Phone: +571-234-5190
    Email: investors@ecopetrol.com.co

    Media Relations (Colombia)
    Mauricio Tellez
    Phone: + 571-2345377
    Fax: +571-2344480
    Email: mtellez@ecopetrol.com.co

    Website: www.ecopetrol.com.co

SOURCE Ecopetrol