OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 ☐ 1934 For the transition period from _______________ to _______________ ORION ENGINEERED CARBONS S.A. (Exact name of registrant as specified in its charter) | | | (I.R.S. Employer Identification No.) (State ...

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, 2019 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 001-36563 ORION ENGINEERED CARBONS S.A. (Exact name of registrant as specified in its charter) Grand Duchy of Luxemb ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 o Transition report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 or FORM 20-F o Registration statement pursuant to Section 12(b) or 12(g) of the Securities Exchange Act of 1934 o Shell company report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 or Commission file number: 001- 36563 ORION ENGINEERED CARBONS S.A. x Annual report pursuant to Section 13 or 15(d) of the Securities Exchange ...