Ecopetrol S.A., 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".

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.

Bogotá, October 7 of  2009