SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16 OF THE

SECURITIES EXCHANGE ACT OF 1934

October 2010

Commission File Number: 333-153452

ECOPETROL S.A.

(Exact name of registrant as specified in its Charter)

Carrera 7 No. 37 – 69

BOGOTA – COLOMBIA

(Address of registrant’s principal executive offices)

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

Form 20-F x Form 40-F o

 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        o 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        o No x

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

Yes        o 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   

PRESS RELEASE

Ecopetrol Announces Results for the third quarter of 2010

and the nine-month period ended Sep. 30 of 2010

· Production for the Ecopetrol Corporate Group for the quarter was 632.1 MBOED, up 16.4% compared to the same period last year.

· Ecopetrol S.A.’s net income for the quarter reached COL$1.7 trillion, and COL$5.6 trillion between January and September of 2010, increasing 42.7% and 57.2% respectively compared to 2009.

· EBITDA margin increased to 46% during the quarter and to 44% for the nine-month period ended September 30, 2010.

· The hydro-treatment plant began producing diesel and gasoline according to the highest international quality standards.

· A new subsidiary was incorporated for the construction of the Oleoducto Bicentenario.

BOGOTA, Oct. 26 / — Ecopetrol S.A. (BVC: ECOPETROL; NYSE: EC; BVL: EC; TSX: ECP) (“Ecopetrol” or the “Company”) announced today its unaudited unconsolidated and consolidated financial results for the third quarter of 2010 and the nine-month period ended Sep. 30, 2010, prepared and filed in accordance with the Public Accountancy Legal Framework (Regimen de Contabilidad Publica – RCP) of the Colombian General Accounting Office and in Colombian pesos (COL$).

This current report on Form 6-k is hereby incorporated by reference into the Company’s registration statement on Form F-3 filed with the U.S. Securities and Exchange Commission on February 12, 2010.

The table below sets forth the highlights of Ecopetrol’s financial results for the periods indicated

Highlights of Ecopetrol’s financial results

	Unconsolidated																		Consolidated
(COP$ Billion)	3Q 2010			3Q 2009			%			Nine-month period ended Sep 30, 2010			Nine-month period ended Sep 30, 2009			%			3Q 2010			3Q 2009			%			Nine-month period ended Sep 30, 2010			Nine-month period ended Sep 30, 2009			%
Total sales		8,586.7			7,370.0			16.5	%		26,461.5			19,168.3			38.0	%		9,892.2			8,901.8			11.1	%		30,324.2			21,418.4			41.6	%
Operating profit		2,865.9			2,224.1			28.9	%		8,757.3			5,377.5			62.9	%		2,767.4			2,330.3			18.8	%		8,927.2			5,493.8			62.5	%
Operating margin		33	%		30	%					33	%		28	%					28	%		26	%					29	%		26	%
EBITDA		3,952.1			3,037.6			30.1	%		11,694.3			7,474.4			56.5	%		4,033.0			3,212.4			25.5	%		12,067.3			8,102.0			48.9	%
EBITDA margin		46	%		41	%					44	%		39	%					41	%		36	%					40	%		38	%
Net Income		1,702.4			1,193.4			42.7	%		5,604.1			3,564.9			57.2	%		1,723.5			1,109.8			55.3	%		5,444.8			3,410.6			59.6	%
Net margin		20	%		16	%					21	%		19	%					17	%		12	%					18	%		16	%
Earnings per share (COP$)		42.06			29.49						138.46			88.08

Ecopetrol’s CEO, Javier Gutierrez, said: “The third quarter’s results were very important for our strategic plan. Beside the production growth above 16%, the discovery of hydrocarbons in two exploratory wells and the acquisition of a 51% interest in BP in Colombia, are evidence that we are headed in the right direction to strengthen our E&P business.

The start in operations of the hydro-treatment plant which allows us to supply cleaner fuels with the highest international standards, the advances in the structuring of the Oleoducto Bicentenario project, and the beginning of production and transportation of biodiesel were also highlights of the quarter. As we had anticipated, today we are reporting important achievements. Another important milestone was the listing of the company’s ADR on the Toronto Stock Exchange, allowing us to continue strengthening our presence in the international capital markets. With this listing, Canadian investors with growing interest in Colombia and Ecopetrol are now able to follow our results and strategy more closely.

In summary, it was a positive quarter for the Company, which gives us confidence in achieving the goals for 2010, and accomplishing the objectives set for 2015 and 2020.”

1

PRESS RELEASE

Ecopetrol Announces Results for the third quarter of 2010 and

the nine-month period ended September 30, 2010

Table of Contents

I. Financial and operating results		3
a.	Availability of crude oil and products	3
b.	Ecopetrol sales volumes	4
c.	Price behavior	5
d.	Financial Results	6
e.	Cash flow and position	7
f.	Results by Segment	8
g.	Balance sheet	8
a.	Exploration	10
b.	Production	11
c.	Refining	13
d.	Transportation	14
e.	Biofuels	15
III. Corporate Social Responsibility		16
a.	Human talent and recognition	16
b.	Science and technology	17
d.	Health, Safety and Environmental Performance	17
IV.  Financial Results of Ecopetrol and Subsidiaries (consolidated)		18
V. Presentation of Results		20
VI. Tables		22

2

PRESS RELEASE

I. Financial and operating results

a. Availability of crude oil and products

The availability of Ecopetrol crudes and products is summarized in the following table of volumes produced, purchased and imported:

Ecopetrol S.A. (does not include subsidiaries) Gross oil and gas production
(MBOED)	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude Oil		498.9		412.8		20.9	%		471.9		394.1		19.7	%
Natural Gas		98.4		96.0		2.5	%		97.5		90.4		7.9	%
Total		597.3		508.8		17.4	%		569.4		484.5		17.5	%

(-) Royalties
(MBOED)	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude Oil		77.8		62.1		25.3	%		71.3		59.9		19.0	%
Natural Gas		20.3		19.0		6.8	%		19.1		18.0		6.1	%
Total		98.1		81.1		21.0	%		90.4		77.9		16.0	%

(=) Net oil and gas production
(MBOED)	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude oil		421.1		350.7		20.1	%		400.6		334.2		19.9	%
Gas natural		78.1		77.0		1.4	%		78.4		72.4		8.3	%
Total		499.2		427.7		16.7	%		479.0		406.6		17.8	%

Purchase volume (mboed)*	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude Oil		174.4		164.1		6.3	%		175.1		163.1		7.4	%
Refined products		3.5		7.3		(52.1	)%		5.2		8.1		(35.8	)%
Natural Gas		36.4		38.6		(5.7	)%		37.9		36.9		2.7	%
Total Purchases		214.3		210.0		2.0	%		218.2		208.1		4.9	%

Imports volume (mbd)	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Products		48.1		41.5		15.9	%		59.5		37.5		58.7	%

	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Total available**		761.6		679.2		12.1	%		756.7		652.2		16.0	%

* Purchase volume includes royalties from Ecopetrol and other companies

** Does not include inventories variations

The Company’s growing crude and gas production was the main source of supply for the Company’s operations increasing 17.4% from the third quarter of 2009 to the same period of 2010. In terms of purchased volumes, total purchases grew 2% and third-party crude purchases increased 6.3% compared to the third quarter of 2009.

The 15.9% growth in imports was due to 1) the purchase of diesel with very low sulphur content in order to comply with the environmental regulations before the Company’s hydro-treatment plant became operational, and 2) increased naphtha imports to act as a diluent for the transportation of heavy crude oils.

3

PRESS RELEASE

b. Ecopetrol sales volumes

Local Sales Volume (mboed)	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude Oil		4.8		0.4		1,100.0	%		3.6		0.3		1,100.0	%
Natural Gas		87.1		75.5		15.4	%		96.1		67.8		41.7	%
Gasoline		59.3		73.5		(19.3	)%		61.8		73.9		(16.4	)%
Medium Distillates		99.9		82.8		20.7	%		101.7		79.1		28.6	%
LPG and fuel oil		14.5		18.9		(23.3	)%		15.2		19.7		(22.8	)%
Industrial and Petrochemical		17.1		13.8		23.9	%		16.7		12.8		30.5	%
Total Local Sales		282.7		264.9		6.7	%		295.1		253.6		16.4	%

Export Sales Volume (mboed)	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude Oil		303.0		248.0		22.2	%		294.0		216.4		35.9	%
Products		54.0		40.3		34.0	%		50.7		50.7		0.0	%
Natural Gas		5.6		23.1		(75.8	)%		2.3		24.1		(90.5	)%
Total Export Sales		362.6		311.4		16.4	%		347.0		291.2		19.2	%

Sales to Free Trade Zone (mboed)	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude Oil		75.9		76.2		(0.4	)%		77.5		79.5		(2.5	)%
Products		2.9		2.3		26.1	%		2.3		2.0		15.0	%
Natural Gas		2.1		1.9		10.5	%		2.4		2.0		20.0	%
Total Sales to Free Trade Zone		80.9		80.4		0.6	%		82.2		83.5		(1.6	)%
Total Sales Volume		726.2		656.7		10.6	%		724.3		628.3		15.3	%

The increase in sales shown in the table above is primarily the result of:

International market:

The most significant developments in the Company’s international sales activity during the third quarter were:

· The exporting of six shipments of Castilla crude of one million barrels each.

· Growth in gas exports to Venezuela.

· Increase in sales to refineries in United States, from 5.5 million barrels in the third quarter 2009 to 6.4 million barrels in the same period this year.

As shown above, there was an increase in crude exports to Africa, Canada and Central and South America in the third quarter of 2010 compared to the same period in 2009. Product exports to the Caribbean and Central America were also significantly higher during the period.

Export destinations: Crudes
Destination	3Q 2010			3Q 2009
US Gulf Coast		56.6	%		58.6	%
Far east		12.5	%		21.6	%
Central America		6.5	%		0.3	%
South America		6.5	%		2.8	%
Africa		5.5	%		2.4	%
US West Coast		3.9	%		5.5	%
Caribbean		3.7	%		4.2	%
Canada		3.6	%		0.0	%
US Atlantic Coast		1.2	%		2.4	%
Europe		0.0	%		2.2	%
		100.0	%		100.0	%

Export destinations: Products
Destination	3Q 2010			3Q 2009
US Gulf Coast		46.2	%		20.5	%
Far east		23.4	%		7.2	%
Central America		9.4	%		13.3	%
South America		0.0	%		6.9	%
Caribbean		3.2	%		22.2	%
US Atlantic Coast		0.0	%		19.0	%
Europe		17.8	%		10.9	%
		100.0	%		100.0	%

4

PRESS RELEASE

Local market:

Local sales increased by 6.7% in the third quarter of 2010.  Such increase was largely the result of the growth in sales of medium distillates, natural gas and industrial and petrochemical products.

Growing sales of medium distillates is the result of constraints in the supply of B100 (100% palm biofuel) to wholesalers, who had to purchase higher B2 volumes from Ecopetrol to supply the market. Additionally, there was an increase on JET fuel demand due to a lower price of this fuel in Colombia compared to the close references and a growth of frequencies in the airlines in the country.

Gasoline sales decreased during the third quarter of 2010 compared to the same period of 2009 due to a lower demand in the north coast as well as in the western region of the country. The lower demand was partially offset by the reduction in ethanol content on gasoline, which decreased from 10% to 8%, requiring additional 2% of gasoline in the blend.

In the nine month period ended September 2010, local sales represented 52% of total sales, rising 12% when compared to the same period 2009. The growth is mainly because of the higher deliveries of natural gas (80GBTU) and diesel to thermal plants (1.4 MBD).

c. Price behavior

Average price export basket	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
WTI (average)		76.2		68.3		11.6	%		77.6		57.0		36.1	%
Export crude oil basket		69.9		62.4		12.0	%		70.7		50.4		40.3	%
Export products basket		68.1		61.2		11.3	%		68.8		47.7		44.2	%
Natural gas basket		4.0		3.1		29.0	%		3.8		3.4		11.8	%

Crude differentials of Ecopetrol crude oil basket in the third quarter were close to those of the same period one year ago (US$-6.3/Bl in the third quarter of 2010 vs US$-5.9/Bl in the third quarter of 2009). The price of Castilla crude has been recovering as a result of 1) improvements in refining margins, 2) the reduction in heavy crude production by OPEC countries and Mexico, and 3) the lack of supply in the market of the Canadian Cold Lake crude due to the disruption of its transport lines between the West and East coasts and to within the United States.

Product differentials increased during the third quarter 2010 compared to the third quarter of 2009 (US$-8,1/Bl in the third quarter of 2010 vs US$-7,1/Bl in the third quarter of 2009) as a result of steeper discounts on fuel oils in the international markets. However, the discount for the nine-month period ended September 30, 2010 was lower than in 2009 due to the consolidation of Colombian fuel oil shipments using larger capacity tankers for transporting products to Singapore (a country with high demand and an attractive bunker price for shipping fuel).

The price of the natural gas basket rose on an increase in the price of Guajira gas, (which is the most significant gas production in respect of the Company’s gas revenue).  According to CREG (Colombian energy and gas regulatory commission) regulation this price is indexed to fuel oil prices.

5

PRESS RELEASE

d. Financial Results

Ecopetrol S.A. (does not include subsidiaries)

Income Statement (COP$ Billion)	3Q 2010			3Q 2009			%			Nine-month period ended Sep 30, 2010			Nine- month period ended Sep 30, 2009			%
Local Sales		3,115.4			2,765.6			12.6	%		9,871.0			7,697.6			28.2	%
Export Sales*		5,137.5			4,356.8			17.9	%		15,615.2			10,755.3			45.2	%
Sales of services		333.8			247.6			34.8	%		975.3			715.4			36.3	%
Total Sales		8,586.7			7,370.0			16.5	%		26,461.5			19,168.3			38.0	%
Variable Costs		3,851.6			3,383.2			13.8	%		12,169.7			9,009.0			35.1	%
Fixed Costs		1,415.0			1,247.4			13.4	%		4,014.4			3,298.3			21.7	%
Cost of Sales		5,266.6			4,630.6			13.7	%		16,184.1			12,307.3			31.5	%
Gross profit		3,320.1			2,739.4			21.2	%		10,277.4			6,861.0			49.8	%
Operating Expenses		454.2			515.2			(11.8	)%		1,520.1			1,483.5			2.5	%
Operating Profit		2,865.9			2,224.2			28.9	%		8,757.3			5,377.5			62.9	%
Non Operating Profit/(Loss)		(556.4	)		(588.9	)		(5.5	)%		(1,167.4	)		(425.6	)		174.3	%
Income tax		607.1			441.8			37.4	%		1,985.8			1,387.0			43.2	%
Net Income		1,702.4			1,193.5			42.6	%		5,604.1			3,564.9			57.2	%
Earnings per share (COP$)	$	42.06		$	29.49			42.6	%	$	138.46		$	88.08			57.2	%
EBITDA		3,952.1			3,037.6			30.1	%		11,694.3			7,474.4			56.5	%
EBITDA Margin		46	%		41	%					44	%		39	%
Operating Margin		33	%		30	%					33	%		28	%
Net Margin		20	%		16	%					21	%		19	%

* Sales to Free trade zones for the year 2009 were reclasified as export sales to make financial statements comparable

Ecopetrol’s net income in third quarter 2010 exceeded that of the same period one year ago, while the first nine months of 2010 also saw an increase compared to 2009. The higher net income primarily was the result of higher operating income derived from increases in volume and international prices. The increase in revenues was higher than the increase in costs which resulted in higher operating margin (33% in the third quarter of 2010 vs. 30% in the third quarter 2009). EBITDA margin was significantly higher for the quarter by 46%, and 44% cumulative for the year.

The following key factors are noted when comparing the third quarter 2010 financial results with those of last year as well as cumulative through the end of September 2010 and 2009:

· Total sales increased primarily due to: 1) higher sales volume, and 2) higher crude and product prices.

· Variable costs increased mainly as a result of an increase in hydrocarbon purchases, imports as well as amortization and depletion stemming from new capitalizations and greater production. The effect of the peso revaluation against the U.S. dollar had a favorable effect by reducing costs.

· Fixed costs increased due to the higher contracted services both for direct as well as subsidiary operations, maintenance, well renovations and depreciations.

· Operating expenses decreased due to lower exploratory expenses and projects as a result of fewer dry well recognitions,

· Trade expenses increased derived from the economic recognition to customers of natural gas delivery cancellations resulting from operating and weather factors.

6

PRESS RELEASE

· A non-operating loss of COL$556.4 billion was recorded for the third quarter primarily because of:

o A loss in registered interests, according to the equity method, of COL$293 billion primarily a result of: 1) dry well recognition at Ecopetrol Brasil (COL$160 billion); 2) negative margins of the Cartagena refinery margins (COL$63 billion), and 3) recognition of exploratory expenses in Ecopetrol Peru (COL$57 billion).

o Net loss of COL$128.5 billion due to the effect of the peso revaluation in the mark to market of dollar-denominated portfolio investments. However, it is important to highlight that the net position in foreign currency that resulted from the debt acquired in dollars has decreased the Company’s exposure to these exchange rate factors. The Company’s active net position in U.S. dollars at September 30, 2010 was US$511 million.

o Net allowances of COL$25.6 billion, primarily in the line item “allowance of property, plant and equipment”

o Net financial income of COL$98.4 billion corresponding to interest, and mark to market of the investment portfolio.

o Other minor expenditures of COL$10.8 billion.

e. Cash flow and position

Col$ Billion*	3Q 2010			3Q 2009			Nine-month period ended Sep 30, 2010
Initial Cash		7,885			5,535			4,840
Cash generated from operations (+)		8,736			9,129			26,456
Cash used in operations (-)		(6,133	)		(6,058	)		(17,140	)
Capex (-)		(1,449	)		(1,408	)		(4,164	)
Acquisitions (-)		(1,161	)		-			(1,161	)
Dividend payments (-)		(1,214	)		(2,938	)		(2,469	)
New debt (+)		-			3,509			-
Other inflows (+/-)		358			263			968
Fx differences (+)		(230	)		(238	)		(538	)
Final Cash		6,792			7,794			6,792

*For purposes of registration, the balances in U.S. dollars are converted to pesos each month at the average exchange rate. The initial cash in each quarter is calculated at the average first month rate and final cash is calculated with the average rate of the last month of the quarter.

As of September 30, 2010, Ecopetrol registered approximately COL$6.8 trillion in its total portfolio of liquidity surpluses, equivalent to cash and investments, including investments in portfolios held to maturity of COP$118.5 billion.

The company generated COL$ 8.7 trillion in cash from operations, which is less than the COL$9.1 trillion generated the year before, mainly because in the third quarter of 2010 only COL$144 billion of subsidies were received, compared to COL$1.6 trillion in the same period of 2009.

7

PRESS RELEASE

f. Results by Segment

Results by Segment

COP$ Billion

	E&P						Refining						Transportation						Sales and Marketing						Eliminations						Ecopetrol
	3Q2010			Nine- month period endedSep 30,2010			3Q2010			Nine- month period endedSep 30,2010			3Q2010			Nine- month period endedSep 30,2010			3Q2010			Nine- month period endedSep 30,2010			3Q2010			Nine- month period endedSep 30,2010			3Q2010			Nine- month period endedSep 30,2010
Domestic Sales		2,528.8			7,228.5			2,866.0			8,968.4			787.4			2,244.9			234.4			751.2			(2,967.3	)		(8,346.7	)		3,449.3			10,846.3
International Sales		2,973.5			8,920.3			650.8			1,895.6			-			-			1,513.2			4,799.3			-			-			5,137.5			15,615.2
Total Sales		5,502.3			16,148.8			3,516.8			10,864.0			787.4			2,244.9			1,747.6			5,550.5			(2,967.3	)		(8,346.7	)		8,586.8			26,461.5
Operating Revenues		2,845.7			8,526.5			(209.6	)		(490.2	)		167.0			549.1			41.2			171.8			-			-			2,844.3			8,757.2
Operating Margin		51.7	%		52.8	%		(6.0	)%		(4.5	)%		21.2	%		24.5	%		2.4	%		3.1	%		-			-			33.1	%		33.1	%
Net Income		1,835.4			5,769.2			(190.3	)		(613.9	)		74.8			426.0			39.3			22.7			-			-			1,759.1			5,604.0
Net Margin		33.4	%		35.7	%		(5.4	)%		(5.7	)%		9.5	%		19.0	%		2.2	%		0.4	%		-			-			20.5	%		21.2	%
EBITDA		3,768.8			11,000.7			(114.6	)		(238.8	)		237.7			760.8			40.6			171.6			-			-			3,932.5			11,694.3
Ebitda Margin		68.5	%		68.1	%		(3.3	)%		(2.2	)%		30.2	%		33.9	%		2.3	%		3.1	%		-			-			45.8	%		44.2	%

Note: The report by segment is calculated based on transfer prices between business units, using as reference export parity prices.

Exploration and Production:

The Exploration and Production segment generated a net income of COL$1,835.4 billion in third quarter of 2010 as a result of the continued growth of the Company’s production. Net income corresponding to this segment totaled COL$5,769.2 billion in the nine-month period ended September 30, 2010. The Ebitda margin of the segment was 68.5% during the third quarter and 68.1% for the nine-month period ended September 30, 2010.

Refining:

The Refining and Petrochemical segment recorded a loss of COL$190.3 billion in the third quarter of 2010 and a loss of COL$613.9 billion for the nine-month period ended September 30, 2010, with an operating margin of US$-3.7/barrel. Starting September, imports of Premium Diesel decreased from 39MBD to 24MBD as a result of the commencement of operations of the hydro-treatment plant at the Barrancabermeja refinery. The Ebitda margin of the segment was -3.3% during the third quarter and     -2.2% for the nine-month period ended September 30, 2010.

Transportation:

The Transportation segment generated net income of COP$74.8 billion in the third quarter of 2010 and net income of COP$426.0 billion for the nine-month period ended September 30, 2010. These increases were primarily due to the increase in volumes transported, which resulted from higher volumes of crude, biodiesel and other fuels. The Ebitda margin of the segment was 30.2% during the third quarter and 33.9% for the nine-month period ended September 30, 2010.

Supply and Marketing:

The Supply and Marketing segment generated net income of COP$39.3 billion in the third quarter of 2010 and net income of COP$22.7 billion for the nine-month period ended September 30, 2010, mainly as a result of higher volumes traded of crude and premium diesel. The Ebitda margin of the segment was 2.3% during the third quarter and 3.1% for the nine-month period ended September 30, 2010.

g. Balance sheet

The following table sets forth a summary of Ecopetrol’s unconsolidated balance sheet as of the periods indicated:

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Unconsolidated
Balance Sheet (COP$ Billion)	As of September 30, 2010		As of June 30, 2010		%
Current Assets		11,554.3		11,278.8		2.4	%
Long Term Assets		48,604.7		47,815.9		1.6	%
Total Assets		60,159.0		59,094.7		1.8	%
Current Liabilities		10,608.1		11,211.5		(5.4	)%
Long Term Liabilities		13,127.6		13,358.1		(1.7	)%
Total Liabilities		23,735.7		24,569.6		(3.4	)%
Equity		36,423.3		34,525.1		5.5	%
Total Liabilities and Shareholders´ Equity		60,159.0		59,094.7		1.8	%
Debit Memorandum accounts		85,123.2		88,299.8		(3.6	)%
Credit Memorandum accounts		63,519.1		62,875.8		1.0	%

During the third quarter of 2010 the main variations in assets were 1) Higher mark to market due to the valuation of variable income portfolio investments, and adjustments made to fixed assets amounting to COL$210 billion; 2) Payment of the second installment of the dividend to the shareholders amounting to COL$1.2 trillion; 3) Depletion of the Company’s investment portfolio which was used for the payment of the acquisition of 51% of BP Exploration Company Colombia Limited; 4) Incorporation and capitalization of Oleoducto Bicentenario de Colombia S.A.S. for COL$306 billion, registered as an account payable; 5) Increase in property, plant and equipment of COL$804 billion, principally attributable to capitalizations associated with the start in operation of the hydro-treatment plant at the Barrancabermeja refinery.

The Company’s liabilities declined 3% in the third quarter of 2010 mainly as a result of the payment of the second installment of the dividend to the Company’s shareholders, in August 2010.

The Company’s equity increased 5.5% during the quarter mainly due to 1) recognition of the valuation surplus in property, plant and equipment investments, 2) revaluation of long-lifed assets, and 3) a decrease in the surplus from the equity method.

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II. Aspects of the Business

a. Exploration

Exploration in Colombia (does not include subsidiaries):

During the nine-month period ended September 30, 2010, the following exploratory drilling was carried out in Colombia:

A-3 and stratigraphic wells

Nine-month period ended Sep 30, 2010

Typeofwell	Numberof wells	Hydrocarbon Presence	Underevaluation	Dry
A-3	12	3	0	9
Stratigraphic	8	4	0	4

Wells with hydrocarbon presence

Nine-month period ended Sep 30, 2010

Well	Type	Basin	Province
Quifa-6	A-3	Llanos	Meta
Rio Zulia West	A-3	Catatumbo	Norte de Santander
Oripaya	A-3	Catatumbo	Norte de Santander
Quifa-20x	Stratigraphic	Llanos	Meta
Quifa-22x	Stratigraphic	Llanos	Meta
Quifa-24x	Stratigraphic	Llanos	Meta
Quifa-26x	Stratigraphic	Llanos	Meta

During the third quarter of 2010, Ecopetrol concluded the drilling of two exploratory wells. The Oripaya well, of which Ecopetrol is operator with 100% participation rights, is located in Uribante Block (Catabumbo Basin – Norte de Santander Province) and has shown the presence of surface hydrocarbons. The Gouda well in the El Queso block (Valle Superior del Magdalena Basin – Tolima and Huila provinces), in which Ecopetrol is a 50% risk participant, was plugged and abandoned.

At the end of the third quarter of 2010, Ecopetrol was involved in drilling the Odin and Tinkhana wells in Valle Superior del Magdalena Basin and the Akacias well in the Llanos Basin.

Corporate Group Exploration:

International wells

Nine-month period ended Sep 30, 2010

Type of well	Number of wells	Hydrocarbon Presence	In evaluation	Dry
A-3	5	0	2	3

During the third quarter international exploratory activities were conducted on three wells: the Malbec and Itauna wells in Brazil, and the Runtusapa well in Peru.

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The Malbec well was plugged and abandoned. As of September 30, 2010, the Runtusapa well was being drilled, as was the Itauna well, which showed the presence of hydrocarbons.

In Colombia, the subsidiary Hocol conducted activities on four wells during the third quarter, adding to six wells in the nine month period ended September 2010. Five of the wells were plugged and abandoned and one is still on evaluation.

Seismic:

Total seismic data acquired during the nine-month period ended September 30, 2010 increased by 465% compared to the same period in 2009. 75% percent of acquired seismic in 2010 was at the international level by subsidiaries.

The following table summarizes the Company’s seismic activity:

Seismic Activity KM Eq
	Jan-Sep2010		Jan-Sep2009		%
Direct		1,295		1,443		-10	%
Joint ventures		2,761		130	2024		%
Association contracts		-		627		-100	%
Hocol		1,095		416		163	%
International		11,022		249		4327	%
Total		16,173		2,865		465	%

b. Production

Production of Ecopetrol S.A.:

Gross production equivalent of Ecopetrol S.A. crude and gas increased 17.4% from 508.8 mboed in the third quarter of 2009 to 597.3 mboed in the third quarter of 2010, 83.5% of which was crude. Average production in the nine-month period ended September 30, 2010 reached 569.4 mboed, which represents an increase of 17.5% from the same period in 2009.  In such nine-month period, Ecopetrol’s direct production share of total production was 43%.

The following table summarizes the Company’s production per crude for the periods indicated:

Production per crude
	3Q 2010		3Q 2009		%			Nine-month periodended Sep 30, 2010		Nine-month periodended Sep 30, 2009		%
Light crudes		55.8		44.6		25.1	%		46.0		44.3		3.8	%
Medium crudes		227.3		221.9		2.4	%		224.0		212.5		5.4	%
Heavy crudes		215.8		146.3		47.5	%		201.9		137.3		47.1	%
Total		498.9		412.8		20.9	%		471.9		394.1		19.7	%

Does not include subsidiaries

During the third quarter 2010, heavy crude accounted for 43% of total crude production compared to 35% in the same period of 2009. The increase is in line with initiatives implemented by the Company during 2010 to develop direct operations at the Castilla and Chichimene fields, and partnerships at the Rubiales and Quifa fields. In particular, Castilla’s results stood out with gross production in excess of 100 MBOD in the months of August (101 MBOD) and September (102 MBOD).

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During the quarter, natural gas production increased to 562 MCFD compared to 548 MCFD in the same period in 2009. The nine-month period ended September 30, 2010 has shown a 7.7% increase reaching a natural gas production of 555 MCFD.

The following table summarizes the Company’s development well drilling activity for the periods indicated:

DevelopmentWells
	3Q2010		3Q2009		%			Nine-month periodended Sep30,2010		Nine-month periodended Sep30,2009		%
Direct		60		38		58	%		122		105		16	%
In partnership		155		103		50	%		400		320		25	%
Total		215		141		52	%		522		425		23	%

During the nine-month period ended September 30, 2010, 522 wells were drilled, with an increase of 23% compared with the same period in 2009. Direct drilling activity rose by 16%. The details of drilling per region during the nine-month period ended September 30, 2010 are summarized in the following table:

Developmentwells
Region	Directwells		Asociatedwells
Magdalena		39		213
Central		74		141
North east		0		4
Catatumbo Orinoquia		0		8
South		9		31
Others		0		3
Total		122		400

Costs for Ecopetrol S.A:

The lifting cost per barrel produced by Ecopetrol (including royalties) was US$7.28/BL for the nine-month period ended September 30, 2010, compared to US$6.40/BL for the same period of 2009. The US$0.88/BL rise was a result of the revaluation of the Colombian peso vs. the U.S. dollar and higher costs associated with maintaining surface, subsoil and subsidiary infrastructures. The growth of the Company’s volumes produced had a favorable effect by reducing the cost.

Lifting cost calculated over barrels produced net of royalties is US$9.21/Bl for the nine month period ended September 2010, compared to US$7.71/Bl in the same period of 2009.

Corporate group:

The following table summarizes the Ecopetrol Corporate Group’s production on a consolidated basis:

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Oil and gas production including royalties (mboed)
Ecopetrol S.A.	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude Oil		498.9		412.8		20.9	%		471.9		394.1		19.7	%
Natural Gas		98.4		96.0		2.5	%		97.5		90.4		7.9	%
Total		597.3		508.8		17.4	%		569.4		484.5		17.5	%

Hocol	3Q 2010		3Q 2009				Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude Oil		25.4		23.8	6.7	%		24.8		23.6		5.1	%
Natural Gas		-		1.9	-100.0	%		1.1		1.4		(21.4	)%
Total		25.4		25.7	-1.2	%		25.9		25.0		3.6	%

Savia	3Q 2010		3Q 2009				Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude Oil		6.4		5.8	10.3	%		6.5		5.6		16.1	%
Natural Gas		1.1		1.4	-21.4	%		0.9		1.4		-35.7	%
Total		7.5		7.2	4.2	%		7.4		7.0		5.7	%

Ecopetrol America INC (K2)	3Q 2010		3Q 2009				Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Crude Oil		1.7		1.2	41.7	%		1.7		0.7		142.9	%
Natural Gas		0.2		0.1	100.0	%		0.2		-		100.0	%
Total		1.9		1.3	46.2	%		1.9		0.7		171.4	%
Total Group's production		632.1		543.0	16.4	%		604.6		517.2		16.9	%

c. Refining

Barrancabermeja refinery:

Despite the completion of scheduled maintenance in two units, through-put at the Barrancabermeja Refinery during the third quarter of 2010 was higher compared to the same period in 2009.

The following table summarizes the refinery runs at the Barrancabermeja refinery:

Refinery runs Barrancabermeja

Mbod	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Barrancabermeja		232.3		211.9		9.6	%		222.2		212.9		4.4	%

In terms of the hydro-treatment project, the diesel plant began operations in August followed by the gasoline plant in September, allowing for the delivery of clean fuels from the Company’s own production.

Margins and costs for Ecopetrol S.A.:

The cash operating cost of the Barrancabermeja refinery for the nine-month period ended September 30, 2010 was US$5.48/BL, a decrease of US$0.07BL from the same period in 2009, resulting from 1) higher through-put, 2) lower costs generated from optimization of chemical product and fuel usage; 3) better management of planned stoppages; and 4) lower general costs.

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Refining margin of the Barrancabermeja Refinery (average price of sold products minus average price of raw materials purchases) for the nine-month period ended September 30, 2010 was US$7.29/Bl, compared to US$4.74/Bl during the same period in 2009. The increase was a result of a higher average price of the product basket (US$81.24/Bl vs. US$59.00/Bl) that offset the growth on crude oil and product purchases (diesel imports mainly) which increased from US$54.30/Bl to US$73.95/Bl. The improvement of the margin is driven by a better crack spread and a cheaper feed.

Cartagena refinery:

At the Cartagena Refinery (Reficar S.A.) through-put during the third quarter of 2010 was lower than that of the third quarter of last year as a result restrictions on the operation of the refinery’s crude unit which will undergo general maintenance during the fourth quarter of 2010.

Refinery runs Cartagena

Mbod	3Q 2010		3Q 2009		%			Nine-month period ended Sep 30, 2010		Nine-month period ended Sep 30, 2009		%
Cartagena		75.7		80.1		(5.5	)%		77.7		79.1		(1.8	)%

For the nine-month period ended September 30, 2010, execution for the Development Master Plan in the Cartagena Refinery amounted to COL$690.5 billion. According to latest estimates, the mechanical end date will be February 28 of 2013.

d. Transportation

Volumes transported:

Volume transported during the third quarter of 2010 rose by 33% compared to the same period of 2009, from 785.5 MBOD to 1,048.0 MBOD. Most of the growth was in the transportation of crude, which increased from 557.1 MBOD during the third quarter of 2009 to 792.7 MBOD during the third quarter of 2010 (42.3% increase). The growth in crude transport results from: 1) Expansion of transportation capacity of the Galan-Ayacucho 18” Pipeline; 2) Expansion of the transportation capacity of the Apiay-Porvenir oil pipelines and; 3) Optimization of the Ayacucho-Covenas 16” and Vasconia-GRB 20” pipelines. In terms of refined products, the increase in volume transported during the period reflected an increase in the transportation capacity of the Pozos Colorados-Galan 14” pipeline.

Infrastructure expansion:

The Company’s Program for Crude Extraction led to significant growth in the Company’s transportation capacity, coming mainly from 1) The Llanos Orientales region with an increase in the transport capacity of the Castilla – Apiay pipeline from 80 to 120 MBOD, 2) The Mid Magdalena Valley with an increase in the transport capacity of the Vasconia – Barrancabermeja pipeline from 140 to 160 MBOD and 3) The pumping capacity between the Ayacucho and Covenas pipeline increased from 40 to 48 MBOD.

Regarding undergoing projects, the construction of the 170,000 barrel storage tank at the Altos del Porvenir station was 40% completed; the expansion of the truck unloading facility in Ayacucho and Banadia was 56% completed; and the construction of the Andino multi-use pipeline for transporting refined hydrocarbons was 43% completed.

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Costs:

The barrel/kilometer transport cost for the nine-month period ended September 30, 2010 was COL$7.95 BKM in real terms, a decrease from the COL$8.10 BKM recorded in the same period of 2009.  This decrease results from higher volumes transported, notwithstanding greater maintenance activity and higher energy consumption (mainly resulting from oil pipeline operations).

Relevant Transportation Activities of the Group

Ocensa and ODL continued with the execution of expansion projects. Transported volumes by Ocensa during the third quarter increased significantly compared to the same period in 2009. The Porvenir-Vasconia section transported volume grew 57.1%, while the increase in the Vasconia-Coveñas section was 37.1%.

Ecopetrol incorporated the new subsidiary “Oleoducto Bicentenario de Colombia S.A.S.” in charge of the execution of the Oleoducto Bicenterario project. Interested parties will make their respective contributions and capitalize the company in the necessary amounts to start the construction. In order to meet the expected timelime, the environmental licenses for the first phase of the pipeline (section Araguaney – Banadía) were requested.

e. Biofuels

On August 1, 2010, Ecopetrol began blending Biodiesel and Diesel (Extra and Regular) at the Barrancabermeja refinery, which resulted in the delivery of two new products B2 and B2E (2% Biodiesel and 98% Diesel) to customers.

The biodiesel is being supplied by Ecodiesel Colombia S.A. from its Biodiesel plant to the refinery’s blending unit. The biodiesel is then transported via its multi-use pipeline system positioning Colombia as the first country in Latin America to use multi-purpose lines to transport biofuel mixtures.

During the months of August and September 2010, Ecodiesel production was stable and the biofuel produced was of optimum quality. The operation of this project helps ensure the Ecopetrol Corporate Group’s synergies, the sustainability of Ecopetrol’s biodiesel program at the Barrancabermeja refinery, and the consolidation of Ecopetrol’s new biofuels business.

f. 2010 investment plan

During the nine-month period ended September 30, 2010, Ecopetrol’s organic investments totaled US$3,364 billion, a 45.5% increase from the same period in 2009. Additionally, the Company acquired a 51% interest in BP Exploration Company Colombia Limited for US$645 million, which was announced on August 3, 2010. As of September 30 the transaction is undergoing the required necessary legal authorizations process on behalf of the Colombian authorities in order to finalize the transaction.

The total amount invested during the nine-month period ended September 30, 2010 reached US$4.0 billion, out of which 48% was allocated to production (US$1.9 billion), 16% to acquisitions (US$645 million), 12% to transport (US$459 million), 10% for refining and petrochemicals (US$415 million), 7% for subsidiaries (US$288 million), 4% for exploration (US$171 million) and the remaining 3% for the corporate segment and others (US$107 million).

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III. Corporate Social Responsibility

a. Human talent and recognition

In order to ensure the results of the work environment index, Ecopetrol continued with the execution of the necessary steps to become one of the best companies to work according to the Great Place to Work methodology. Additionally, the Company made progress in developing the technical, organizational and leadership skill of its employees.

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b. Science and technology

The Company’s primary achievements in science and technology during the third quarter of 2010 were:

· Ecopetrol was one of the 51 finalists for the MAKE (Most Admired Knowledge Enterprises) award. This award recognizes the most admired worldwide companies in knowledge management.

· Five patent requests were made in Colombia during the quarter and PCT (Patent Cooperation Treaty) international phase corresponding to the same number of innovative technologies for current application into the company. These requests are added to the 15 requests during the year, which reflects the innovation strategy of the company and its mechanism of protection of those innovative components.

c. Social investment

Several social investment agreements were signed during the third quarter of 2010, bringing the total amount committed to social investment to COL$52,894 million for the year, with resources being negotiated with other entities at the rate of $1.52 for each peso invested in Ecopetrol. In this quarter we highlight the following agreements of social management: “Strengthening of Labor Opportunities Program”, “Territorial connectivity program: Via Barranca” and “Environmental Preservation in the Catatumbo basin and tributaries”.

In addition, phase one of the Company’s environmental management program and phase two of the Company’s environmental emissions project began, through which the Company aims to make environmental management an active component of its strategic plan.

d. Health, Safety and Environmental Performance

The following is a summary of the Company’s performance in the area of Health, Safety and Environment (HSE) during the third quarter of 2010:

· Reduction in the number of environmental incidents for operational reasons to 15 during the third quarter of 2010, compared to 43 incidents in the same period of 2009.

· Reduction in the frequency of absenteeism during the quarter due to job-related illnesses (events per one million man hours) from 0.5 in the third quarter of 2009 to 0.2 in the third quarter of 2010.

· The combined accidental frequency rate, which measures the number of accidents per million man working hours, was 1.54 in the nine-month period ended September 30, 2010, which represents a 24% increase over the rate for the same period in 2009. In order to reduce the number of accidents the Company is adopting a cultural model based on behaviors, which aims to identify and control risks through HSE case methodologies, and implementing a training program for critical activities in order to develop HSE skills. The program also emphasizes the role of managers and leaders in reducing the number of accidents.

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IV.  Financial Results of Ecopetrol and Subsidiaries (consolidated)1

For the third quarter of 2010, over 34 mboed of the 632.1 mboed of the Corporate Group’s daily production came from our subsidiary upstream companies: Hocol, Savia Peru, and Ecopetrol America Inc. Similarly, subsidiaries like Hocol, Propilco, Comai and Ecopetrol America Inc made significant contributions to the Ecopetrol Corporate group’s business and operations.

However, there are some subsidiary companies that do not yet make any financial contribution to the results of the Ecopetrol Corporate group, as these are still in a pre-operating stage or are conducting exploratory activities but do not yet have production. For the third quarter of 2010, Ecopetrol’s subsidiaries had an overall net loss which was primarily the result of the exploratory activity of Ecopetrol del Peru (Blocks 101, 134 and 158) and Ecopetrol del Brasil (well BM ES 29) and the pre-operating activities of Bioenergy.

The following tables summarize Ecopetrol’s consolidated financial results for the periods indicated:

Consolidated Income Statement*
(COP$ Billion)	3Q 2010			3Q 2009			%			Nine- month period ended Sep 30, 2010			Nine- month period ended Sep 30, 2009			%
Local Sales		3,816.9			3,361.5			13.5	%		11,800.4			10,049.0			17.4	%
Export Sales*		5,694.3			5,292.5			7.6	%		17,017.7			10,654.1			59.7	%
Sales of services		381.0			247.8			53.8	%		1,506.1			715.4			110.5	%
Total Sales		9,892.2			8,901.8			11.1	%		30,324.2			21,418.4			41.6	%
Variable Costs		4,739.9			4,593.6			3.2	%		14,638.9			10,284.2			42.3	%
Fixed Costs		1,585.7			1,478.0			7.3	%		4,484.7			4,230.1			6.0	%
Cost of Sales		6,325.6			6,071.6			4.2	%		19,123.6			14,514.3			31.8	%
Gross profit		3,566.6			2,830.2			26.0	%		11,200.6			6,904.1			62.2	%
Operating Expenses		799.2			499.9			59.9	%		2,273.4			1,410.3			61.2	%
Operating Profit		2,767.4			2,330.3			18.8	%		8,927.2			5,493.8			62.5	%
Non Operating Profit/(Loss)		(435.6	)		(689.5	)		(36.8	)%		(1,238.7	)		(584.1	)		112.1	%
Income tax		599.7			532.4			12.6	%		2,131.1			1,507.7			41.3	%
Minority interest		8.6			(1.4	)		(714.3	)%		112.6			(8.6	)		(1,409.3	)%
Net Income		1,723.5			1,109.8			55.3	%		5,444.8			3,410.6			59.6	%
EBITDA		4,033.0			3,212.4			25.5	%		12,067.3			8,102.0			48.9	%
EBITDA Margin		41	%		36	%					40	%		38	%
Operating Margin		28	%		26	%					29	%		26	%
Net Margin		17	%		12	%					18	%		16	%

* For ilustration purposes only

** Sales to Free trade zones for the year 2009 were reclasified as export sales to make financial statements comparable

1 For purposes of preparing the consolidated results for third quarter 2010, in addition to Ecopetrol’s results, those of the following affiliates were included:

Ecopetrol Oleo e Gas Do Brasil, Ecopetrol America Inc, Ecopetrol del Peru S.A., ECP Global Energy, Hocol, Bioenergy S.A., Andean Chemicals Limited, Propilco S.A., Comai, ODL Finance S.A., Ecopetrol Transportation Company, Oleoducto de Colombia, Ocensa S.A., Reficar S.A. and Black Gold Re Ltd.

The consolidated financial results for the third quarter of 2009 include the following companies:  Ecopetrol Oleo e Gas Do Brasil, Ecopetrol America Inc, Ecopetrol del Peru S.A.,Hocol, Bioenergy S.A., Andean Chemicals Limited, ECP Global Energy, Propilco S.A., Comai, ODL Finance S.A., Black Gold Re Ltd., Ecopetrol Transportation Company, Oleoducto de Colombia, Ocensa S.A., and Reficar S.A.

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Balance Sheet (COP$ Billion)	As of September 30, 2010		As of June 30, 2010		%
Current Assets		14,012.2		14,359.2		(2.4	)%
Long Term Assets		49,960.7		47,922.5		4.3	%
Total Assets		63,972.9		62,281.7		2.7	%
Current Liabilities		11,025.2		11,957.6		(7.8	)%
Long Term Liabilities		15,729.0		15,006.6		4.8	%
Total Liabilities		26,754.2		26,964.2		(0.8	)%
Equity		36,265.9		34,348.7		5.6	%
Minority interest		952.8		968.8		(1.7	)%
Total Liabilities and Shareholders´ Equity		63,972.9		62,281.7		2.7	%
Debit Memorandum accounts		86,525.3		89,667.0		(3.5	)%
Credit Memorandum accounts		62,422.6		63,812.0		(2.2	)%

The subsidiaries that contributed the most to total sales for nine-month period ended September 30, 2010 (without taking into account eliminations) were Reficar with COL$3,549.0 billion, Hocol with COL$ 1,817.1 billion, Ocensa S.A. with COL$1,044.6 billion, and Propilco S.A. with  COL$991.1 billion.

Among subsidiaries, the highest contributors to the Group’s net income during the nine-month period ended September 30, 2010 were Ocensa with COL$292.6 billion, Hocol with COL$182.3 billion and Propilco (including Comai) with COL$43.6 billion. On the other hand, subsidiaries with the highest net losses were Ecopetrol America Inc. with a net loss of COL$266.9 billion, Ecopetrol del Brasil with a net loss of COL$182.9 billion and Ecopetrol del Peru with a net loss of COL$57.6.

Under the equity method, Offshore International Group contributed net income of COL$40.3 billion.

Consolidated Ebitda as of September 30, 2010 was COL$12,067.3 billion, which represents an Ebitda margin of 40%, driven mainly by the Corporate Group’s outstanding operating results.

In the third quarter of 2010, the subsidiaries with the highest net income were Hocol with COL$35.6 billion, and Propilco S.A with COL$9.3 billion. The subsidiaries with the highest net losses were Ecopetrol Brasil with a net loss of COL$171.1 billion and Ecopetrol del Peru with a net loss of COL$56.9 billion.

Consolidated Ebitda for the nine-month period ended September 30, 2010 was COL$4,033.0 billion, and an Ebitda margin of 41%. Ebitda increase was mainly driven by the revenue growth for the Corporate Group.

19

PRESS RELEASE

V. Presentation of Results

On Wednesday, October 27, Ecopetrol’s management will hold two presentations on the Web to discuss results for the third quarter of 2010 and the nine-month period ended September 30, 2010.

In Spanish	In English
October 27, 2010	October 27, 2010
1:00 p.m. Bogota-Lima	2:30 pm Bogota-Lima
2:00 p.m. New York-Toronto	3:30 p.m. New York-Toronto

The webcast will be available on Ecopetrol’s website: www.ecopetrol.com.co.

Please access the site 10 minutes beforehand in order to download any necessary software. A copy of the webcast will remain available throughout the year following the live event.

About Ecopetrol S.A.

Ecopetrol S.A. (BVC: ECOPETROL; NYSE: EC) is the largest company in Colombia in terms of revenue, profit, assets and shareholders’ equity. Ecopetrol is Colombia’s only vertically integrated crude oil and natural gas company with operations in Colombia, Brazil, Peru and the U.S. Gulf Coast.  Its affiliates include Propilco, as well as Black Gold Re Ltda., Ecopetrol Oleo e Gas do Brazil Ltda., Ecopetrol America Inc., Ecopetrol del Peru S.A., Hocol, Andean Chemicals Limited, COMAI, Bioenergy S.A., ODL Finance S.A., ECP Global Energy, Ecopetrol Transportation Company, Ocensa S.A., Oleoducto de Colombia and Refineria de Cartagena. Ecopetrol is one of the 40 largest oil companies in the world and one of the four principal oil companies in Latin America. It is majority owned by the Republic of Colombia, and its shares are traded on the Bolsa de Valores de Colombia S.A. (BVC) under the symbol ECOPETROL, on the New York Stock Exchange (NYSE) through its ADR and on the Bolsa de Valores de Lima (BVL) under the symbol EC. The company divides its operations into five business segments that include exploration and production, transport, refining, petrochemicals, marketing and sale of petroleum, and corporate.

For more information on Ecopetrol, visit www.ecopetrol.com.co

Forward-looking statements

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.

20

PRESS RELEASE

Contact information:

Investor Relations Director

Alejandro Giraldo

Telephone: +571-234-5190

Fax: +571-234-5628

E-mail: investors@ecopetrol.com.co

Media Relations (Colombia)

Jorge Mauricio Tellez

Telephone: + 571-234-4329

Fax: +571-234-4480

E-mail: mauricio.tellez@ecopetrol.com.co

21

PRESS RELEASE

VI. Tables

 Unaudited Income Statement

 Ecopetrol S.A.

COP$ Million	3Q-10			3Q-09			%			2Q-10			As of September 30, 2010			As of September 30, 2009			%
Income
Local Sales		3,115,437			2,765,553			12.7	%		3,372,841			9,871,035			7,697,566			28.2	%
Export Sales		5,137,480			4,356,821			17.9	%		5,437,495			15,615,222			10,755,334			45.2	%
Sale of Services		333,802			247,647			34.8	%		322,847			975,252			715,383			36.3	%
Total Income		8,586,719			7,370,021			16.5	%		9,133,183			26,461,509			19,168,283			38.0	%
Cost of Sales											-
Variable Costs											-
Purchase of Hydrocarbons		2,085,145			1,954,898			6.7	%		2,273,654			6,525,217			5,096,133			28.0	%
Amortization and Depletion		759,901			530,033			43.4	%		642,430			2,007,738			1,353,891			48.3	%
Imported products		710,195			628,336			13.0	%		1,148,515			2,868,381			1,574,851			82.1	%
Transportation Cost for Refineries		197,153			188,873			4.4	%		162,254			554,882			549,661			0.9	%
Inventories		68,524			(65,002	)		205.4	%		114,515			5,843			(16,594	)		135.2	%
Other		30,707			146,096			(79.0	)%		158,210			207,657			451,099			(54.0	)%
Fixed Costs
Depreciation		212,186			158,983			33.5	%		199,801			605,624			472,717			28.1	%
Contracted Services		463,326			377,971			22.6	%		439,635			1,299,963			1,055,637			23.1	%
Maintenance		250,882			221,867			13.1	%		239,121			659,068			522,045			26.2	%
Labor Costs		238,700			233,904			2.1	%		232,742			722,737			598,178			20.8	%
Other		249,919			254,675			(1.9	)%		255,831			727,055			649,746			11.9	%
Total Cost of Sales		5,266,638			4,630,634			13.7	%		5,866,708			16,184,165			12,307,364			31.5	%
Gross Profits		3,320,081			2,739,387			21.2	%		3,266,475			10,277,344			6,860,919			49.8	%
Operating Expenses
Administration		120,343			146,866			(18.1	)%		120,311			333,817			363,938			(8.3	)%
Selling expenses		246,404			200,502			22.9	%		306,721			772,130			609,953			26.6	%
Exploration and Projects		87,480			167,829			(47.9	)%		146,284			414,174			509,613			(18.7	)%
Operating Income		2,865,854			2,224,190			28.8	%		2,693,159			8,757,223			5,377,415			62.9	%
Non Operating Income (expenses)
Financial Income		888,412			1,530,205			(41.9	)%		1,207,951			3,058,543			6,008,832			(49.1	)%
Financial Expenses		(920,255	)		(1,755,377	)		47.6	%		(1,078,370	)		(3,004,504	)		(5,661,911	)		46.9	%
Non Financial Income		138,474			119,279			16.1	%		173,142			504,426			439,833			14.7	%
Non Financial Expenses		(370,007	)		(526,803	)		29.8	%		(474,533	)		(1,556,877	)		(1,292,186	)		20.5	%
Income before income tax		2,309,500			1,635,323			41.2	%		2,407,435			7,589,867			4,951,785			53.3	%
Provision for Income Tax		607,144			441,803			37.4	%		602,437			1,985,847			1,386,995			43.2	%
Minority interest		-			-			0.0	%		-
Net Income		1,702,356			1,193,520			42.6	%		1,804,998			5,604,020			3,564,790			57.2	%
EBITDA		3,952,142			3,037,569			30.1	%		3,635,691			11,694,283			7,474,437			56.5	%
EBITDA MARGIN		46	%		41	%					40	%		44	%		39	%
EARNINGS PER SHARE	$	42.06		$	29.49			42.6	%	$	44.60		$	138.46		$	88.08			57.2	%

Notes

-Beginning 2010 transportation service's cost are reclasified as variable costs

- Amounts reported of purchases and imports in the third quarter of 2009 were adjusted in order to make them comparable as an effect of the assignation of price differences generated in the purchase process

- Sales to Free trade zones for the year 2009 were reclasified as export sales to make financial statements comparable

22

PRESS RELEASE

Unaudited Income Statement

Ecopetrol S.A. and Subsidiaries *

COP$ Million	3Q-10			3Q-09			%			2Q-10			As of September 30, 2010			As of September 30, 2009			%
Income
Local Sales		3,816,906			3,361,491			13.5	%		4,102,371			11,800,425			10,048,973			17.4	%
Export Sales		5,694,256			5,292,486			7.6	%		5,783,161			17,017,673			10,654,058			59.7	%
Sale of Services		380,969			247,829			53.7	%		328,811			1,506,147			715,383			110.5	%
Total Income		9,892,131			8,901,806			11.1	%		10,214,343			30,324,245			21,418,414			41.6	%
Cost of Sales
Variable Costs		4,739,929
Purchase of Hydrocarbons		2,203,762			2,660,045			(17.2	)%		2,863,218			7,839,507			5,829,569			34.5	%
Amortization and Depletion		851,846			569,576			49.6	%		783,941			2,274,092			1,463,372			55.4	%
Imported products		1,542,964			964,901			59.9	%		1,445,074			4,095,276			2,019,117			102.8	%
Transportation Cost for Refineries		170,523			137,049			24.4	%		171,062			553,250			497,837			11.1	%
Inventories		(7,520	)		(99,681	)		(92.5	)%		176,537			(110,403	)		(51,273	)		115.3	%
Other		(21,646	)		361,667			(106.0	)%		(34,137	)		(12,839	)		525,564			(102.4	)%
Fixed Costs		1,585,695												-			-			0.0	%
Depreciation		325,938			441,920			(26.2	)%		170,816			762,185			1,004,143			(24.1	)%
Contracted Services		486,868			369,474			31.8	%		431,152			1,321,754			1,078,521			22.6	%
Maintenance		311,947			284,409			9.7	%		289,360			811,322			669,203			21.2	%
Labor Costs		250,521			253,347			(1.1	)%		244,832			759,139			639,779			18.7	%
Other		210,421			128,898			63.2	%		261,655			830,319			838,475			(1.0	)%
Total Cost of Sales		6,325,624			6,071,605			4.2	%		6,803,510			19,123,602			14,514,307			31.8	%
Gross Profits		3,566,507			2,830,201			26.0	%		3,410,833			11,200,643			6,904,107			62.2	%
Operating Expenses
Administration		145,654			167,060			(12.8	)%		154,387			427,495			453,572			(5.7	)%
Selling expenses		272,691			123,736			120.4	%		321,795			855,311			405,563			110.9	%
Exploration and Projects		380,893			209,087			82.2	%		391,249			990,579			551,160			79.7	%
Operating Income		2,767,269			2,330,318			18.8	%		2,543,402			8,927,258			5,493,812			62.5	%
Non Operating Income (expenses)
Financial Income		2,272,762			3,513,002			(35.3	)%		2,410,906			6,267,295			13,695,750			(54.2	)%
Financial Expenses		(2,419,468	)		(3,789,805	)		(36.2	)%		(2,268,341	)		(6,377,481	)		(13,422,061	)		52.5	%
Non Financial Income		126,043			131,279			(4.0	)%		203,012			535,822			483,906			10.7	%
Non Financial Expenses		(414,887	)		(543,935	)		(23.7	)%		(505,387	)		(1,664,319	)		(1,341,718	)		24.0	%
														-			-			0.0	%
Income before income tax		2,331,719			1,640,859			42.1	%		2,383,592			7,688,575			4,909,689			56.6	%
Provision for Income Tax		599,658			532,408			12.6	%		618,731			2,131,148			1,507,719			41.3	%
Minority interest		8,590			(1,414	)		(707.5	)%		(2,205	)		112,560			(8,605	)		1,408.1	%
Net Income		1,723,471			1,109,865			55.3	%		1,767,066			5,444,867			3,410,575			59.6	%
EBITDA		4,032,956			3,212,357			25.5	%		3,579,622			12,067,310			8,102,023			48.9	%
EBITDA MARGIN		41	%		36	%					35	%		40	%		38	%

Notes

* According to the Public Accounting Framework, Colombian companies only have the obligation to consolidate their financial statements at the end of each fiscal year, wherefore the quarterly figures in this report do not constitute a formal consolidation of Ecopetrol's financial statement, though they do adjust to the methodology defined for this purpose.

23

PRESS RELEASE

Unaudited Balance Sheet

	Ecopetrol S.A.							Ecopetrol S.A. and Subsidiaries
	As of September 30,		As of June 31,					As of September 30,		As of June 31,
COP$ Million	2010		2010		%			2010		2010		%
Assets
Current Assets
Cash and cash equivalents		3,421,565		3,427,341		(0.2	)%		4,992,972		4,867,304		2.6	%
Investments		606,356		1,243,708		(51.2	)%		1,201,318		1,924,788		(37.6	)%
Accounts and notes receivable		2,529,688		2,748,775		(8.0	)%		1,915,839		2,849,060		(32.8	)%
Other		4,996,692		3,858,983		29.5	%		5,902,032		4,718,082		25.1	%
Total Current Assets		11,554,301		11,278,807		2.4	%		14,012,161		14,359,234		(2.4	)%
Non Current Assets
Investments		11,000,767		11,440,259		(3.8	)%		4,271,101		4,819,758		(11.4	)%
Accounts and notes receivable		1,281,974		1,266,844		1.2	%		1,301,625		163,680		695.2	%
Property, plant and equipment, net		13,215,809		12,447,635		6.2	%		20,118,828		19,029,927		5.7	%
Natural and environmental properties, Net		9,255,484		9,094,740		1.8	%		9,897,361		9,803,951		1.0	%
Resources delivered to administration
Other		13,850,688		13,566,478		2.1	%		14,371,817		14,105,183		1.9	%
Total Non Current Assets		48,604,722		47,815,956		1.6	%		49,960,732		47,922,499		4.3	%
Total Assets		60,159,023		59,094,763		1.8	%		63,972,893		62,281,733		2.7	%
Liabilities and Equity
Current Liabilities
Financial obligations		92,703		125,422		(26.1	)%		450,403		523,299		(13.9	)%
Accounts payable and related parties		6,745,659		7,832,596		(13.9	)%		5,026,134		5,143,659		(2.3	)%
Estimated liabilities and provisions		1,285,328		1,341,710		(4.2	)%		1,605,487		1,682,844		(4.6	)%
Other		2,484,428		1,911,804		30.0	%		3,943,220		4,607,796		(14.4	)%
Total Current Liabilities		10,608,118		11,211,532		(5.4	)%		11,025,244		11,957,598		(7.8	)%
Long Term Liabilities
Financial obligations		4,920,035		5,094,890		(3.4	)%		6,823,507		6,043,270		12.9	%
Labor and pension plan obligations		3,036,238		2,911,912		4.3	%		3,044,303		2,920,183		4.3	%
Estimated liabilities and provisions		3,127,080		3,127,565		(0.0	)%		3,202,488		3,201,613		0.0	%
Other		2,044,257		2,223,756		(8.1	)%		2,658,666		2,841,507		(6.4	)%
Total Long Term Liabilities		13,127,610		13,358,123		(1.7	)%		15,728,964		15,006,573		4.8	%
Total Liabilities		23,735,728		24,569,655		(3.4	)%		26,754,208		26,964,171		(0.8	)%
Minoritary Interest									952,805		968,792		(1.7	)%
Equity		36,423,295		34,525,108		5.5	%		36,265,880		34,348,770		5.6	%
Total Liabilities and Shareholders' Equity		60,159,023		59,094,763		1.8	%		63,972,893		62,281,733		2.7	%
Memorandum Debtor Accounts **		85,123,221		88,299,767					86,525,302		89,666,986
Memorandum Creditor Accounts **		63,519,144		62,875,849					62,422,642		63,812,042

Notes

* According to the Public Accounting Framework, Colombian companies only have the obligation to consolidate their financial statements at the end of each fiscal year, wherefore the figures for interim periods  in this report do not constitute a formal consolidation of Ecopetrol's financial statement, though they do adjust to the methodology defined for this purpose.

**Under Colombian GAAP, Ecopetrol must maintain in its accounting the recording of financial information and transactions not reflected in financial statements

24

PRESS RELEASE

Unaudited Cash Flow  Statement

Ecopetrol S.A.

COP$ million													As of September 30,			As of September 30,
	3Q 2010			3Q 2009			%			2Q 2010			2010			2009			%
Cash flow provided by operating activities:
Net income		1,702,355			1,193,520			42.6	%		1,804,998			5,604,019			3,564,790			57.2	%
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, depletion and amortization		1,086,289			813,379			33.6	%		942,531			2,937,060			2,097,022			40.1	%
Provisions		752,500			539,753			39.4	%		913,334			2,191,158			1,178,150			86.0	%
Net changes in operating assets and liabilities:
Accounts and notes receivable		(1,015,830	)		1,204,911			(184.3	)%		934,554			(701,846	)		119,182			(688.9	)%
Inventories		72,862			(67,660	)		207.7	%		219,192			10,893			(17,317	)		162.9	%
Deferred and other assets		(152,998	)		(308,978	)		50.5	%		(458,962	)		(575,513	)		(2,525,923	)		77.2	%
Accounts payable and related parties		112,212			90,763			23.6	%		831,951			2,095,181			2,625,462			(20.2	)%
Taxes payable		(175,601	)		(599,246	)		70.7	%		(1,347,745	)		(1,880,749	)		(3,441,842	)		45.4	%
Labor obligations		20,021			35,971			(44.3	)%		(12,210	)		(6,952	)		6,825			(201.9	)%
Estimated liabilities and provisions		(24,473	)		(18,087	)		35.3	%		391,230			358,506			(31,640	)		1,233.1	%
Cash provided by operating activities		2,523,456			2,945,046			(14.3	)%		4,576,086			10,352,680			3,725,230			177.9	%
Cash flows from investing activities:
Purchase of investment securities		(1,821,683	)		(3,741,998	)		51.3	%		(2,025,193	)		(7,439,317	)		(4,607,977	)		61.4	%
Redemption of investment securities		2,556,856			3,508,213			(27.1	)%		1,219,327			5,944,364			9,853,692			(39.7	)%
Investment in natural and environmental resources - Reserves		(922,366	)		(592,436	)		(55.7	)%		(759,920	)		(2,144,366	)		(1,392,662	)		54.0	%
Additions to property, plant and equipment		(916,915	)		(939,905	)		2.4	%		(1,030,436	)		(2,698,228	)		(3,138,107	)		14.0	%
Net cash used in investing activities		(1,104,108	)		(1,766,126	)		37.5	%		(2,596,222	)		(6,337,547	)		714,946			(986.4	)%
Cash flows from financing activities:
Financial obligations		(179,524	)		3,338,500			(105.4	)%		(13,526	)		(366,510	)		5,103,200			(107.2	)%
Debts from credit and financing operations		(28,050	)		91,295			(130.7	)%		19,655			(42,205	)		112,623			(137.5	)%
Received from associates - capitalization		219			29,664			(99.3	)%		(826	)		556			35,063			(98.4	)%
Payment of dividends		(1,217,769	)		(2,935,994	)		58.5	%		(1,254,644	)		(2,472,405	)		(5,962,183	)		58.5	%
Net cash used in financing activities		(1,425,124	)		523,465			(372.2	)%		(1,249,341	)		(2,880,564	)		(711,297	)		305.0	%
Net increase in cash and cash equivalent		(5,776	)		1,702,385			(100.3	)%		730,523			1,134,569			3,728,879			(69.6	)%
Cash and cash equivalent at beginnig of year		3,427,341			3,896,740			(12.0	)%		2,696,818			2,286,996			1,870,246			22.3	%
Cash and cash equivalent at end of year		3,421,565			5,599,125			(38.9	)%		3,427,341			3,421,565			5,599,125			(38.9	)%

25

PRESS RELEASE

Unaudited Cash Flow  Statement

Ecopetrol S.A. and subdiaries

COP$ million													As of September 30,			As of September 30,
	3Q 2010*			3Q 2009 *			%			2Q 2010 *			2010			2009			%
Cash flow provided by operating activities:
Net income		1,723,470			1,109,865			55.3	%		1,767,065			5,444,865			3,410,575			59.6	%
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, depletion and amortization		1,296,201			1,074,965			20.6	%		1,056,806			3,371,987			2,801,137			20.4	%
Provisions		770,749			605,342			27.3	%		980,724			2,422,157			1,298,874			86.5	%
Net changes in operating assets and liabilities:
Accounts and notes receivable		(1,681,163	)		1,015,910			265.5	%		1,506,742			(994,746	)		867,708			(214.6	)%
Inventories		86,979			(17,273	)		603.6	%		178,967			1,622			(212,950	)		100.8	%
Deferred and other assets		(2,322,012	)		198,815			(1,267.9	)%		1,636,041			(576,646	)		(939,492	)		38.6	%
Accounts payable and related parties		(126,384	)		2,529,226			(105.0	)%		848,588			2,190,041			2,939,393			(25.5	)%
Taxes payable		1,136,885			(639,596	)		277.8	%		(2,979,625	)		(1,055,476	)		(3,372,817	)		68.7	%
Labor obligations		23,959			418,009			(94.3	)%		(9,731	)		(7,106	)		53,694			(113.2	)%
Estimated liabilities and provisions		(57,798	)		(32,175	)		79.6	%		464,292			479,298			297,286			61.2	%
Cash provided by operating activities		762,637			3,890,683			(80.4	)%		5,724,095			10,005,186			7,413,837			35.0	%
Cash flows from investing activities:
Payment for purchase of Companies, net of cash acquired		-			-			0.0	%		-			-			(1,082,580	)		100.0	%
Purchase of investment securities		(1,821,683	)		(3,741,998	)		(51.3	)%		(2,025,193	)		(7,439,317	)		(4,607,977	)		61.4	%
Redemption of investment securities		3,042,968			3,219,297			(5.5	)%		1,003,682			6,107,395			12,862,680			(52.5	)%
Investment in natural and environmental resources - Reserves		(1,165,021	)		122,586			(1,050.4	)%		(746,399	)		(2,373,500	)		(1,430,201	)		66.0	%
Additions to property, plant and equipment		(163,527	)		(2,684,643	)		93.9	%		(2,448,817	)		(3,531,031	)		(9,019,429	)		60.9	%
Net cash used in invesment activities		(107,263	)		(3,084,758	)		(96.5	)%		(4,216,727	)		(7,236,453	)		(3,277,507	)		120.8	%
Cash flows financing activities:
Minority interest		(15,987	)		(69,809	)		77.1	%		(83,424	)		11,494			644,735			(98.2	)%
Financial obligations		775,569			3,494,101			(77.8	)%		247,819			1,109,153			5,801,403			(80.9	)%
Debts from credit and financing operations		(68,227	)		99,872			(168.3	)%		87,488			13,322			(27,351	)		148.7	%
Received from associates - capitalization		219			29,664			(99.3	)%		(826	)		556			35,063			(98.4	)%
Payment of dividends		(1,221,279	)		(3,275,110	)		100.0	%		(1,254,628	)		(2,472,405	)		(6,317,736	)		60.9	%
Net cash used in financing activities		(529,705	)		278,718			(290.1	)%		(1,003,571	)		(1,337,880	)		136,114			(1,082.9	)%
Net increase in cash and cash equivalent		125,668			1,084,643			(88.4	)%		503,798			1,430,853			4,272,444			(66.5	)%
Cash and cash equivalent at beginnig of year		4,867,304			5,301,604			(8.2	)%		4,363,506			3,562,119			2,113,803			68.5	%
Cash and cash equivalent at end of year		4,992,972			6,386,247			-21.8	%		4,867,304			4,992,972			6,386,247			-21.8	%

Notes

* According to the Public Accounting Framework, Colombian companies only have the obligation to consolidate their financial statements at the end of each fiscal year, wherefore the quarterly figures in this report do not constitute a formal consolidation of Ecopetrol's financial statement, though they do adjust to the methodology defined for this purpose.

26

PRESS RELEASE

Calculation and Reconciliation of EBITDA

Ecopetrol S.A.

COP$ Millions	3Q 2010			3Q 2009			%			2Q 2010			As of September 30 2010			As of September 30 2009			%
EBITDA CALCULATION
Operating income		2,693,160			2,224,190			21.1	%		2,693,160			8,757,223			5,377,415			62.9	%
Plus: Depreciations, depletions and amortizations		942,531			813,379			15.9	%		942,531			2,937,060			2,097,022			40.1	%
NON CONSOLIDATED EBITDA		3,635,691			3,037,569			19.7	%		3,635,691			11,694,283			7,474,437			56.5	%
RECONCILIATION NET INCOME TO EBITDA		-			-			0.0	%		-			-			-			0.0	%
Net Income		1,804,998			1,193,520			51.2	%		1,804,998			5,604,019			3,564,790			57.2	%
Depreciations, depletions and amortizations		942,531			813,379			15.9	%		942,531			2,937,060			2,097,022			40.1	%
Financial income		(1,207,951	)		(1,530,205	)		(21.1	)%		(1,207,951	)		(3,058,543	)		(6,008,832	)		(49.1	)%
Financial expenses		1,078,370			1,755,377			(38.6	)%		1,078,370			3,004,504			5,661,911			(46.9	)%
Non financial income		(173,142	)		(119,279	)		45.2	%		(173,142	)		(504,426	)		(439,833	)		14.7	%
Non financial expenses		474,533			526,803			(9.9	)%		474,533			1,556,877			1,292,186			20.5	%
Results in subsidiaries		113,914			(43,829	)		(359.9	)%		113,914			168,944			(79,802	)		(311.7	)%
Provision for income tax		602,438			441,803			36.4	%		602,438			1,985,848			1,386,995			43.2	%
NON CONSOLIDATED EBITDA		3,635,691			3,037,569			19.7	%		3,635,691			11,694,283			7,474,437			56.5	%
Ecopetrol and Subsidiaries
	3Q 2010			3Q 2009			%			2Q 2010			As of September 30 2010			As of September 30 2009			%
EBITDA CALCULATION
Operating income		2,767,268			2,330,318			18.8	%		2,543,402			8,927,257			5,493,812			62.5	%
Plus: Depreciations, depletions and amortizations		1,296,201			1,074,965			20.6	%		1,056,806			3,371,987			2,801,137			20.4	%
Minority interest		(30,513	)		(192,926	)					(20,586	)		(231,934	)		(192,926	)
CONSOLIDATED EBITDA		4,032,956			3,212,357			25.5	%		3,579,622			12,067,310			8,102,023			48.9	%
RECONCILIATION NET INCOME TO EBITDA		-			-			0.0	%		-			-			-
Net income		1,723,470			1,109,865			55.3	%		1,767,065			5,444,865			3,410,575			59.6	%
Depreciations, depletions and amortizations		1,296,201			1,074,965			20.6	%		1,056,806			3,371,987			2,801,137			20.4	%
Financial income		(2,272,762	)		(3,513,002	)		(35.3	)%		(2,410,905	)		(6,267,294	)		(13,695,750	)		(54.2	)%
Financial expenses		2,419,468			3,789,805			(36.2	)%		2,268,340			6,377,480			13,422,061			(52.5	)%
Non financial income		(126,043	)		(131,279	)		(4.0	)%		(203,011	)		(535,821	)		(483,906	)		10.7	%
Non financial expenses		414,887			543,935			(23.7	)%		505,388			1,664,320			1,341,718			24.0	%
Minority interest on net income		8,590			(1,414	)		(707.5	)%		(2,205	)		112,560			(8,605	)		(1,408.1	)%
Provision for income taxes		599,658			532,408			12.6	%		618,731			2,131,148			1,507,719			41.3	%
Minority interest on Ebitda		(30,512	)		(192,926	)					(20,587	)		(231,934	)		(192,926	)
TOTAL EBITDA		4,032,956			3,212,357			25.5	%		3,579,622			12,067,310			8,102,023			48.9	%

27

PRESS RELEASE

Subsidiaries

Exploration and Production

· Hocol

Production including royalties (MBOED)	3Q 2010		3Q 2009		As of Sep. 2010		As of Sep. 2009
Crude Oil		25.4		23.8		24.8		23.6
Natural gas		-		1.9		1.1		1.4
Total		25.4		25.7		25.9		25.0
Royalties (MBOED)	3Q 2010		3Q 2009		As of Sep. 2010		As of Sep. 2009
Crude Oil		2.90		3.00		2.90		3.00
Natural gas		0.00		0.10		0.10		0.10
Total		2.9		3.1		3.0		3.1
Net Production (MBOED)	3Q 2010		3Q 2009		As of Sep. 2010		As of Sep. 2009
Crudo Oil		22.50		20.80		21.90		20.6
Natural Gas		0.00		1.80		1.0		1.3
Total		22.5		22.6		22.9		21.9

Income Statement
US$ million	3Q 2010			3Q 2009		As of sept. 2010			As of sept. 2009
Local Sales		5.6			8.5		22.9			26.9
Export Sales		675.2			564.6		1,794.2			1,278.7
Total Sales		680.8			573.1		1,817.1			1,305.6
Variable Costs		458.0			119.1		1,185.6			729.3
Fixed Costs		65.8			311.2		213.5			311.2
Cost of Sales		523.8			430.3		1,399.1			1,040.5
Gross profit		157.0			142.8		418.0			265.1
Operating Expenses		111.5			0.3		158.1			8.8
Operating Profit		45.5			142.5		259.9			256.3
Non Operating Profit/(Loss)		(16.0	)		5.0		(41.4	)		(5.5	)
Income tax		(6.1	)		50.9		36.4			81.7
Net Income/Loss		35.6			96.6		182.1			169.1
EBITDA		101.7			192.7		430.0			406.2
EBITDA Margin		0.1			0.3		0.2			0.3

Balance Sheet
US$ million	As of Sep. 30, 2010		As of June 30, 2010
Current Assets		851.9		884.3
Long Term Assets		1,149.1		1,115.4
Total Assets		2,001.0		1,999.7
Current Liabilities		431.8		437.6
Long Term Liabilities		141.4		148.1
Total Liabilities		573.2		585.7
Equity		1,427.8		1,414.0
Total Liabilities and Shareholders´ Equity		2,001.0		1,999.7

28

PRESS RELEASE

· Offshore International Group (OIG)

Production for Ecopetrol (MBOED)	3Q 2010		3Q 2009		As of sep. 2010		As of sep. 2009
Crude oil		6.4		5.8		6.5		5.6
Natural gas		1.1		1.4		0.9		1.4
Total		7.5		7.2		7.4		7.0
Production Royalties (MBOED)	3Q 2010		3Q 2009		As of sep. 2010		As of sep. 2009
Crude oil		1.0		0.9		1.0		0.9
Natural gas		0.2		0.2		0.1		0.2
Total		1.2		1.1		1.1		1.1
Production Net (MBOED)	3Q 2010		3Q 2009		As of sep. 2010		As of sep. 2009
Crude oil		5.4		4.9		5.5		4.7
Natural gas		0.9		1.2		0.8		1.2
Total		6.3		6.1		6.3		5.9

Income Statement
US$ million	3Q 2010			3Q 2009			As of sept. 2010		As of sept. 2009
Local Sales		81.4			68.8			230.2		158.0
Sales of services		(0.4	)		(31.9	)		0.6		2.0
Total Sales		81.0			36.9			230.8		160.0
Variable Costs		28.2			28.8			93.6		91.2
Fixed Costs		11.7			(0.3	)		35.3		23.3
Cost of Sales		39.9			28.5			128.9		114.5
Gross profit		41.1			8.4			101.9		45.5
Operating Expenses		23.0			(3.7	)		33.2		13.9
Operating Profit		18.1			12.1			68.7		31.6
Non Operating Profit/(Loss)		23.5			18.4			69.0		36.8
Income tax		4.7			5.6			16.4		13.2
Employee profit sharing		0.8			1.0			3.0		2.3
Deferred taxes		3.0			0.3			5.0		(1.8	)
Net Income/Loss		15.0			11.5			44.6		23.1

Balance Sheet
US$ million	As of Sep. 30, 2010		As of June 30, 2010
Current Assets		211.5		185.0
Long Term Assets		321.6		274.0
Total Assets		533.1		459.0
Current Liabilities		100.7		54.0
Long Term Liabilities		16.1		10.0
Deferred taxes		16.6		12.0
Total Liabilities		133.4		76.0
Equity		399.7		383.0
Total Liabilities and Shareholders´ Equity		533.1		459.0

29

PRESS RELEASE

Refining & Petrochemicals

· Propilco

Sales volume (tons)	3Q 2010		3Q 2009		As of sep. 2010		As of sep. 2009
Polypropylene		104,655		99,675		303,005		303,615
Polypropylene marketing for COMAI		2,493		2,270		7,464		6,868
Total		107,148		101,945		310,468		310,483

Income Statement
(COP$ Billion)	3Q 2010			3Q 2009		As of sept. 2010			As of sept. 2009
Local Sales		161.8			128.5		501.4			357.0
Export Sales		157.3			153.2		489.7			426.9
Total Sales		319.1			281.7		991.1			783.9
Variable Costs		278.9			178.3		866.1			615.6
Fixed Costs		21.7			63.0		63.0			63.0
Cost of Sales		300.6			241.3		929.1			678.6
Gross profit		18.5			40.4		62.0			105.3
Operating Expenses		23.9			21.1		69.9			67.3
Operating Profit		(5.4	)		19.3		(7.9	)		38.0
Non Operating Profit/(Loss)		16.3			4.2		55.9			8.4
Income tax		1.6			2.5		4.4			5.0
Net Income/Loss		9.3			21.0		43.6			41.4

Balance Sheet
COP$ Billion	As of Sep 30, 2010		As of Jun 30, 2010
Current Assets		500.3		522.3
Long Term Assets		530.7		526.3
Total Assets		1,031.0		1,048.6
Current Liabilities		376.6		404.0
Long Term Liabilities		30.9		30.3
Total Liabilities		407.5		434.3
Equity		623.5		614.3
Total Liabilities and Shareholders´ Equity		1,031.0		1,048.6

· Reficar S.A.

Refinery runs (MBD)	3Q 2010		3Q 2009		As of sep. 2010			As of sep. 2009
Utilization %	101.0	%	101.4	%		101.3	%		101.6	%

					As of sep.		As of sep.
Sales Volume Bls	3Q 2010		3Q 2009		2010		2009
Local		3,420,447		3,847,161		11,030,499		11,522,160
International		4,630,800		3,331,188		13,334,233		10,244,560
Total		8,051,247		7,178,349		24,364,732		21,766,720

30

PRESS RELEASE

Income Statement
(COP$ Billion)	3Q 2010			3Q 2009			As of sept. 2010			As of sept. 2009
Local Sales		618.7			571.8			1,711.9			1,383.6
Export Sales		695.9			504.9			1,837.1			1,087.1
Total Sales		1,314.6			1,076.7			3,549.0			2,470.7
Variable Costs		1,274.4			879.4			3,354.3			2,306.0
Fixed Costs		39.3			180.9			164.8			180.9
Cost of Sales		1,313.7			1,060.3			3,519.1			2,486.9
Gross profit		0.9			16.4			29.9			(16.2	)
Operating Expenses		11.7			8.3			40.5			34.4
Operating Profit		(10.8	)		8.1			(10.6	)		(50.6	)
Non Operating income		19.6			(32.2	)		50.4			(24.2	)
Non Operating expenses		(48.6	)		-			(80.2	)		-
Non Operating Profit/(Loss)		(39.8	)		(24.1	)		(40.4	)		(74.8	)
Income tax		2.0			5.8			5.4			15.4
Net Income/Loss		(41.8	)		(29.9	)		(45.8	)		(90.2	)

Balance Sheet
COP$ Billion	As of Sep 30, 2010		As of June 30 2010
Current Assets		736.7		1,048.7
Long Term Assets		2,639.0		2,319.2
Total Assets		3,375.7		3,367.9
Current Liabilities		933.2		884.8
Long Term Liabilities		17.3		16.0
Total Liabilities		950.5		900.8
Equity		2,425.2		2,467.1
Total Liabilities and Shareholders´ Equity		3,375.7		3,367.9

Transportation

· Ocensa

Transported  volumes (MBOD)	3Q 2010		3Q 2009		As of sep. 2010		As of sep- 2009
Cusiana-Porvenir		53.3		60.2		53.3		61.3
Porvenir-Vasconia		463.7		295.1		451.0		278.5
Vasconia-Coveñas		269.2		196.4		272.2		190.6
Coveñas-Export Port		227.6		209.5		255.2		220.1

Income Statement
(COP$ Billion)	3Q 2010			3Q 2009			As of sept. 2010			As of sept. 2009
Sales of services		234.2			163.9			1,044.6			509.1
Total Sales		234.2			163.9			1,044.6			509.1
Variable Costs		171.8			141.7			485.3			425.5
Fixed Costs		1.1			-			1.1			-
Cost of Sales		172.9			141.7			486.4			425.5
Gross profit		61.3			22.2			558.2			83.6
Operating Expenses		12.4			8.9			33.7			35.8
Operating Profit		48.9			13.3			524.5			47.8
Non Operating Profit/(Loss)		(74.8	)		(38.5	)		(135.8	)		(82.4	)
Income tax		(8.5	)		4.6			96.1			13.7
Net Income		(17.4	)		(29.8	)		292.6			(48.3	)

31

PRESS RELEASE

Balance Sheet
	As of Sep.		As of June 30,
COP$ Billion	30, 2010		2010
Current Assets		2,038.6		1,105.2
Long Term Assets		1,066.9		1,094.9
Total Assets		3,105.5		2,200.1
Current Liabilities		251.1		186.6
Long Term Liabilities		1,101.6		243.3
Total Liabilities		1,352.7		429.9
Equity		1,752.8		1,770.2
Total Liabilities and Shareholders´ Equity		3,105.5		2,200.1

· ODL

	3Q 2010		3Q 2009		As of sep. 2010		As of Sep. 2009
Transported  volumes (MBOD)		146.6		0.0		134.9		0.0

Income Statement
(COP$ Billion)	3Q 2010			3Q 2009			As of sept. 2010			As of sept. 2009
Sales of services		50.8			-			121.7			-
Total Sales		50.8			-			121.7			-
Variable Costs		7.6			-			18.8			-
Fixed Costs		37.6			-			71.2			-
Cost of Sales		45.2			-			90.0			-
Gross profit		5.6			-			31.7			-
Operating Expenses		2.0			(0.3	)		4.8			-
Operating Profit		3.6			0.3			26.9			-
Non Operating Profit/(Loss)		(9.0	)		11.9			(26.8	)		11.9
Income tax		(1.0	)		-			(3.0	)		-
Net Income		(6.4	)		12.2			(2.9	)		11.9

Balance Sheet
COP$ Billion	As of Sep. 30, 2010		As of Sep. 30, 2010
Current Assets		489.4		542.9
Long Term Assets		1,313.5		1,251.1
Total Assets		1,802.9		1,794.0
Current Liabilities		82.0		163.0
Long Term Liabilities		1,303.8		1,206.3
Total Liabilities		1,385.8		1,369.3
Equity		417.1		424.7
Total Liabilities and Shareholders´ Equity		1,802.9		1,794.0

Bio fuels

· Ecodiesel

Production (Barrels)	3Q 2010		3Q 2009		As of sep. 2010		As of sep. 2009
Biodiesel		140,419.0		-		144,287.0		-
Glycerine		12,192.0		-		12,378.0		-

32

PRESS RELEASE

Income Statement
(COP$ Billion)	3Q 2010
Domestic sales		38.2
Total Sales		38.2
Variable Costs		34.0
Fixed Costs		1.0
Cost of Sales		35.0
Gross profit		3.2
Operating Expenses		0.7
Operating Profit		2.5
Non Operating Profit/(Loss)		0.6
Net Income		0.6

Balance Sheet
COP$ Billion	As of Sep 30, 2010		As of June 30, 2010
Current Assets		27.0		15.5
Long Term Assets		107.0		106.5
Total Assets		134.0		122.0
Current Liabilities		54.0		28.3
Long Term Liabilities		59.0		73.1
Total Liabilities		113.0		101.4
Equity		21.0		20.6
Total Liabilities and Shareholders´ Equity		134.0		122.0

33

SIGNATURE

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, thereto duly authorized.

Date:   October 26, 2010

Ecopetrol S.A.
By:	/s/ Adriana M. Echeverri
Name:	Adriana M. Echeverri
Title:	Chief Financial Officer