QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGEACT OF 1934 For the quarterly period ended March 31, 2026or ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGEACT OF 1934 For the transition period fromtoCommission File Number: 001-37924______________________________________________________________ BlackLine, Inc. (Exact name of Registrant as specified in its charter)______________________________________________________________ (I.R.S. EmployerIdentification No.) 21300 Victory Boulevard, 12th FloorWoodland Hills, CA 91367(Address of principal executive offices, including zip code) (818) 223-9008(Registrant’s telephone number, including area code)______________________________________________________________ Securities registered pursuant to Section 12(b) of the Act: Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the SecuritiesExchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file suchreports), and (2) has been subject to such filing requirements for the past 90 days.Yes☒No Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submittedpursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period thatthe registrant was required to submit such files).Yes☒No Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smallerreporting company, or an emerging growth company.See the definitions of “large accelerated filer,” “accelerated filer,” “smallerreporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act. Large accelerated filer☒Accelerated filer☐Non-accelerated filer☐Smaller reporting company☐Emerging growth company☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the ExchangeAct).Yes☐No☒ The number of shares of the registrant’s common stock outstanding at April30, 2026 was 58,660,917. BlackLine, Inc.Quarterly Report on Form 10-QFor the Quarterly Period Ended March31, 2026 TABLE OF CONTENTS Part I. Financial Information Item 1.Unaudited Condensed Consolidated Financial Statements4Unaudited Condensed Consolidated Balance Sheets atMarch31, 2026andDecember31, 20254Unaudited Condensed Consolidated Statements of Operations for the Quarters EndedMarch31,2026and20255Unaudited Condensed Consolidated Statements of Comprehensive Income for the Quarters EndedMarch31, 2026and20256Unaudited Condensed Consolidated Statements of Stockholders’ Equity for the Quarters EndedMarch31, 2026and20257Unaudited Condensed Consolidated Statements of Cash Flows for the Quarters EndedMarch31,2026and20258Notes to Unaudited Condensed Consolidated Financial Statements10Item 2.Management’s Discussion and Analysis of Financial Condition and Results of Operations21Item 3.Quantitative and Qualitative Disclosures About Market Risk31Item 4.Controls and Procedures32Part II. Other InformationItem 1.Legal Proceedings33Item 1A.Risk Factors33Item 2.Unregistered Sales of Equity Securities and Use of Proceeds61Item 5.Other Information61Item 6.Exhibits61 SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of Section 27A of the SecuritiesAct of 1933, as amended, andSection 21Eof the Securities Exchange Act of 1934, as amended, which statements involvesubstantial risk and uncertainties. In some cases, you can identify forward-looking statements by terminology such as“may,” “will,”“should,” “could,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “intend,” “potential,” “would,” “continue,” “ongoing” orthe negative of these terms or other comparable terminology. All statements other than statements of historical fact are statementsthat could be deemed forward-looking statements, including, but not limited to, statements regarding future financial andoperational performance; statements concerning growth strategies including acquisitions, extension of distribution channels andstrategic relationships, product innovation, international expansion, customer growth and expansion, customer retention, customerservice initiatives, expectations regarding our acquisitions, expectations regarding contract size and increased focus on strategicproducts, expectations for hiring new talent; our ability to accurately forecast revenue and appropriately plan expenses andinvestments; the demand for and benefits from the use of our current and future soluti