UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ 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 number: 001-37924 BlackLine, Inc. (Exact name of registrant as specified in its charter) Delaware 46-3354276 (State or other jurisdiction of inc ...

BlackLine, Inc. (NASDAQ:BL) Q4 2018 Earnings Conference Call February 14, 2019 5:00 PM ET Company Participants Maria Riley - Investor Relations Therese Tucker - Founder and Chief Executive Officer Mark Partin - Chief Financial Officer Conference Call Participants Bhavan Suri - William Blair Robert Oliver - Robert W. Baird & Co. Patrick Walravens - JMP Securities LLC Brian Peterson - Raymond James Mark Murphy - JPMorgan Chase & Co. Brent Bracelin - KeyBanc Capital Markets, Inc. Christopher Merwin - Goldman ...