UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16 UNDER

SECURITIES EXCHANGE ACT OF 1934

For the month of June, 2010

(Commission File No. 001-34429),

PAMPA ENERGIA S.A.
(PAMPA ENERGY INC.)

Argentina

(Jurisdiction of incorporation or organization)

Ortiz de Ocampo 3302
Building #4
C1425DSR
Buenos Aires
Argentina

(Address of principal executive offices)

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

Form 20-F ___X___ Form 40-F ______

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

Yes ______ No ___X___

(If "Yes" is marked, indicate below the file number assigned to the
registrant in connection with Rule 12g3-2(b): 82- .)

Press Release

June 30, 2010

PAMPA ENERGÍA INFORMS TO THE MARKET THAT IT HAS FILED ITS ANNUAL REPORT ON FORM 20-F FOR THE FISCAL YEAR ENDED DECEMBER 31, 2009.

Buenos Aires, June 30, 2010.  Pampa Energía S.A. (NYSE: PAM; Buenos Aires Stock Exchange: PAMP) (“Pampa” or the “Company”), the largest integrated electricity company in Argentina that, through its subsidiaries, participates in the generation, transmission and distribution of electricity, announces today it has filed its annual report on Form 20-F for the fiscal year ended December 31, 2009 (the “2009 Annual Report”) with the U.S. Securities and Exchange Commission (the “SEC”).  The 2009 Annual Report can be accessed by visiting either the SEC’s website at www.sec.gov or the Company’s website at http://www.pampaenergia.com/ir.  In addition, shareholders may receive a hard copy of the Company’s complete audited financial statements free of charge by requesting a copy within a reasonable period of time from Pampa’s Investor Relations Office or from investor@pampaenergia.com.

For further information, contact:

Ricardo Torres - Chief Executive Officer

Mariano Batistella - Responsible for Strategic Planning and Investor Relations

3302 Ortiz de Ocampo, Building #4

(C1425DSR) Ciudad Autónoma de Buenos Aires, Argentina

Phone: 5411 4809 9500

http://www.pampaenergia.com/ir

investor@pampaenergia.com

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, thereunto duly authorized.

Date: June 30, 2010

Pampa Energía S.A.
By:	/S/ Roberto Maestretti
	Name: Roberto Maestretti Title:    Chief Financial Officer

FORWARD-LOOKING STATEMENTS

This press release may contain forward-looking statements. These statements are statements that are not historical facts, and are based on management's current view and estimates offuture economic circumstances, industry conditions, company performance and financial results. The words "anticipates", "believes", "estimates", "expects", "plans" and similar expressions, as they relate to the company, are intended to identify forward-looking statements. Statements regarding the declaration or payment of dividends, the implementation of principal operating and financing strategies and capital expenditure plans, the direction of future operations and the factors or trends affecting financial condition, liquidity or results of operations are examples of forward-looking statements. Such statements reflect the current views of management and are subject to a number of risks and uncertainties. There is no guarantee that the expected events, trends or results will a ctually occur. The statements are based on many assumptions and factors, including general economic and market conditions, industry conditions, and operating factors. Any changes in such assumptions or factors could cause actual results to differ materially from current expectations.