Indicate the number of outstanding shares of each of the issuer’s classes of capital orcommon stock as of the close of the period covered by the annual report. 500,000,000 shares of common stock, par value W5,000 per share Indicate by check mark if the registrant is a well-known seasoned issuer, as defined inRule 405 of the Securities Act. YesNo If this report is an annual or transition report, indicate by check mark if the registrant isnot required to file reports pursuant to Section 13 or 15 (d) of the Securities Exchange Act of1934.YesNo Indicate by check mark whether the registrant (1) has filed all reports required to be filedby Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months(or for such shorter period that the registrant was required to file such reports), and (2) hasbeen subject to such filing requirements for the past 90 days.YesNo Indicate by check mark whether the registrant has submitted electronically everyInteractive Data File required to be submitted pursuant to Rule 405 of Regulation S-T(§232.405 of this chapter) during the preceding 12 months (or for such shorter period that theregistrant was required to submit such files).YesNo Indicate by check mark whether the registrant is a large accelerated filer, an acceleratedfiler, a non-accelerated filer, or an emerging growth company. See the definitions of “largeaccelerated filer,” “accelerated filer” and “emerging growth company” in Rule 12b-2 of theExchange Act. Large accelerated filer☒Accelerated filer☐Non-accelerated filer☐Emerging growth company☐ If an emerging growth company that prepares its financial statements in accordance withU.S. GAAP, indicate by check mark if the registrant has elected not to use the extendedtransition period for complying with any new or revised financial accounting standards†provided pursuant to Section 13(a) of the Exchange Act. † The term “new or revised financial accounting standard” refers to any update issued bythe Financial Accounting Standards Board to its Accounting Standards Codification afterApril 5, 2012. Indicate by check mark whether the registrant has filed a report on and attestation to itsmanagement’s assessment of the effectiveness of its internal control over financial reportingunder Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered publicaccounting firm that prepared or issued its audit report.YesNo If securities are registered pursuant to Section 12(b) of the Act, indicate by check markwhether the financial statements of the registrant included in the filing reflect the correction ofan error to previously issued financial statements. Indicate by check mark whether any of those error corrections are restatements thatrequired a recovery analysis of incentive-based compensation received by any of theregistrant’s executive officers during the relevant recovery period pursuant to § 240.10D-1(b). Indicate by check mark which basis of accounting the registrant has used to prepare thefinancial statements included in this filing:U.S. GAAP☐International FinancialReporting Standards as issued by the International Accounting Standards Board☒Other☐ Auditor Name: Samil PricewaterhouseCoopersAuditor Location: Seoul, KoreaAuditor Firm ID: 1103 If “Other” has been checked in response to the previous question, indicate by check markwhich financial statement item the registrant has elected to follow.Item 17Item 18 If this is an annual report, indicate by check mark whether the registrant is a shellcompany (as defined in Rule 12b-2 of the Exchange Act).YesNo TABLE OF CONTENTS (i)PagePresentation of Financial and Other Information1Forward-Looking Statements2PART IItem 1.Identity of Directors, Senior Management and Advisers3Item 2.Offer Statistics and Expected Timetable3Item 3.Key Information3Item 3.A. [RESERVED]3Item 3.B. Capitalization and Indebtedness3Item 3.C. Reasons for the Offer and Use of Proceeds3Item 3.D. Risk Factors3Item 4.Information on the Company24Item 4.A. History and Development of the Company24Item 4.B. Business Overview26Item 4.C. Organizational Structure38Item 4.D. Property, Plants and Equipment39Item 4A.Unresolved Staff Comments40Item 5.Operating and Financial Review and Prospects41Item 5.A. Operating Results41Item 5.B. Liquidity and Capital Resources53Item 5.C. Research and Development, Patents and Licenses, etc.58Item 5.D. Trend Information60Item 5.E. Critical Accounting Estimates60Item 6.Directors, Senior Management and Employees60Item 6.A. Directors and Senior Management60Item 6.B. Compensation63Item 6.C. Board Practices63Item 6.D. Employees65Item 6.E. Share Ownership66Item 6.F. Disclosure of a Registrant’s Action to Recover ErroneouslyAwarded Compensation66Item 7.Major Shareholders and Related Party Transactions66Item 7.A. Major Shareholders66Item 7.B. Related Party Transactions67Item 7.C. Interests of Experts and Counsel68Item 8.Financial Information69Item 8.A. Consolidated Statements