FORM 10-Q x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period 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 Number 001-36632 EMCORE Corporation (Exact name of registrant as specified in its charter) New Jersey (State or other jurisdiction of incorporation or organization) 22-2746503 (I.R.S. Employer Identification No. ...