UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Securities Registered Pursuant to Section 12(b) of the Act: FORM 10-K (Mark One) x 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(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File No. 001-36876 BABCOCK & WILCOX ENTERPRISES, INC. (Exact name of registrant as specif ...