Table of Contents As filed with the Securities and Exchange Commission on April 29, 2021 | UNITED STATES SECURITIES AND EXCHANGE COMMISSION | | | --- | --- | | Washington, D.C. 20549 | | | Form 20-F | | | (Mark One) | | | (Address of principal executive offices) | | | POSCO Center, 440 Teheran-ro, Gangnam-gu | | | ☒ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 | | For the fiscal year ended December 31, 2020 | | | OR | | | ☐ | TRANSITION REPORT PURSUANT TO SECTION 13 ...