Table of Contents As filed with the Securities and Exchange Commission on April 30, 2019 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F (Mark One) | ☐ | REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 | | --- | --- | | | OR | | ☒ | ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 | | | For the fiscal year ended December 31, 2018 | | | OR | | ☐ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ...