SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Form 6-K
REPORT OF FOREIGN PRIVATE ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16 UNDER
THE SECURITIES EXCHANGE ACT OF 1934
For the month of December 2010
Woori Finance Holdings Co., Ltd.
(Translation of registrant’s name into English)
203, Hoehyon-dong, 1-ga, Chung-gu, Seoul, Korea
(Address of principal executive office)
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 þ 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): o
Note: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K if
submitted solely to provide an attached annual report to security holders.
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): o
Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if
submission to furnish a report or other document that the registration foreign private issuer must
furnish and make public under the laws of the jurisdiction in which the registrant is incorporated,
domiciled or legally organized (the registrant’s “home country”), or under the rules of the home
country exchange on which the registrant’s securities are traded, as long as the report or other
document is not a press release, is not required to be and has not been distributed to the
registrant’s security holders, and if discussing a material event, has already been the subject of
a Form 6-K submission or other Commission filing on EDGAR.
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 þ
Woori Finance Holdings Co., Ltd.’s Filing in Korea Regarding Net Income Forecast for Woori Bank for
2010 and 2011
On December 27, 2010, Woori Finance Holdings Co., Ltd. (“Woori Finance Holdings”) disclosed
in a filing with the Korea Exchange that Woori Bank, a wholly-owned subsidiary of Woori Finance
Holdings, noted in its comment to the press that its net income forecast for 2010 is estimated to
be approximately Korean Won 1.2 trillion, while its net income forecast for 2011 is estimated to be
approximately Korean Won 1.8 trillion assuming certain factors including an anticipated increase in
operating income and an anticipated decrease in expenses relating to loan losses. These estimates
are based on Woori Bank’s internal accounts only and may differ materially from the actual figures.
Forward-Looking Statement Disclaimer
The material above contains forward-looking statements. Statements that are not historical facts,
including statements about our beliefs and expectations, are forward-looking statements. These
statements are based on current plans, estimates and projections, and therefore you should not
place undue reliance on them. Such forward-looking statements involve known and unknown risks,
uncertainties and other factors which may cause our actual results or performance to be materially
different from any future results or performance expressed or implied by such forward-looking
statements. We do not make any representation or warranty, express or implied, as to the accuracy
or completeness of the information contained herein, and nothing contained herein is, or shall be
relied upon as, a promise or representation, whether as to the past or the future. Forward-looking
statements speak only as of the date they are made, and we undertake no obligation to update
publicly any of them in light of new information or future events.