UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D. C. 20549 FORM 10-K ☒ 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 or 15 (d) of the Securities Exchange Act of 1934 For the transition period from to Commission File Number 1-8472 Hexcel Corporation (Exact name of registrant as specified in its charter) Delaware 94-1109521 (State or Other Jurisdiction of Incorporation ...