LOS ANGELES – July 28, 2025 – BlackLine, Inc. (Nasdaq: BL), the future-ready financial operations platform for the Office of the CFO, today announced the appointment of Greg Hughes to its Board of Directors effective July 25, 2025. A seasoned enterprise software executive, Hughes brings decades of experience leading strategic transformation at scale.

Hughes most recently served as CEO of Veritas, a global leader in data protection and other mission-critical software. Under his leadership, Veritas re-ignited ARR growth, successfully transitioned to a new subscription pricing model, and created and scaled a cloud business. The transformation of Veritas culminated in a merger of the data protection business with Cohesity, an AI-powered data security and management company. Hughes continues to serve on the board of the merged entity.

In addition to his executive roles, Hughes brings significant public board experience, having served on the board of LogMeIn, a publicly traded collaboration software company, from 2011 to 2017.

Hughes’ appointment follows the addition of Sam Balaji, former CEO of Deloitte Consulting, to BlackLine’s board in June 2025. Together, Hughes and Balaji bring decades of executive leadership across enterprise software, consulting, cybersecurity, and digital transformation—adding to an already experienced and engaged board that continues to play a vital role in guiding BlackLine’s growth and innovation strategy.

“We are thrilled to welcome Greg to BlackLine’s Board of Directors,” said Owen Ryan, Co-CEO and Chairman of the Board of BlackLine. “With Greg and Sam joining an already strong and strategic board, we are deepening our bench of expertise in enterprise technology, global operations, and transformation at scale. The collective leadership and experience of our board is a powerful asset as we continue executing our strategy and delivering long-term value to our customers and shareholders.”

“Greg’s track record of scaling companies and leading through inflection points makes him a natural fit for BlackLine,” added Therese Tucker, Co-CEO and Founder of BlackLine. “He understands what it takes to build and grow category-defining platforms, and I’m excited to welcome him as we continue to innovate for the Office of the CFO.”

“BlackLine has built a differentiated platform with significant opportunities ahead,” said Greg Hughes. “I’m honored to join the board and look forward to working with the other board members and leadership team to help advance the company’s strategy and support its continued momentum as a category leader in financial operations.”

BlackLine, Inc. (Nasdaq: BL), the future-ready platform for the Office of the CFO, drives digital finance transformation by empowering organizations with accurate, efficient, and intelligent financial operations.

BlackLine’s comprehensive platform addresses mission-critical processes, including record-to-report and invoice-to-cash, enabling unified and accurate data, streamlined and optimized processes, and real-time insight through visibility, automation, and AI. BlackLine’s proven, collaborative approach ensures continuous transformation, delivering immediate impact and sustained value. With a proven track record of innovation, industry-leading R&D investment, and world-class security practices, more than 4,400 customers across multiple industries partner with BlackLine to lead their organizations into the future.

For more information, please visit blackline.com.

# # #

Samantha Darilek

VP, Communications

samantha.darilek@blackline.com

Matt Humphries

SVP, Investor Relations

matt.humphries@blackline.com

Safe Harbor

This document contains forward-looking statements. These statements may relate to, but are not limited to, expectations of future operating results or financial performance of BlackLine, Inc. (“BlackLine” or the “Company”), the calculation of certain key financial and operating metrics, capital expenditures, introduction of new solutions or products, expansion into new markets, regulatory compliance, plans for growth and future operations, technological capabilities, and strategic relationships, as well as assumptions relating to the foregoing. Forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified. 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” or the negative of these terms or other comparable terminology. You should not put undue reliance on any forward-looking statements. Forward-looking statements should not be read as a guarantee of future performance or results, and will not necessarily be accurate indications of the times at, or by, which such performance or results will be achieved, if at all.

Forward-looking statements are based on information available at the time those statements are made and/or management’s good faith beliefs and assumptions as of that time with respect to future events, and are subject to risks and uncertainties that could cause actual performance or results to differ materially from those expressed in or suggested by the forward looking statements. In light of these risks and uncertainties, the forward-looking events and circumstances discussed in this presentation may not occur and actual results could differ materially from those anticipated or implied in the forward-looking statements. These risks and uncertainties are described in greater detail under the heading “Risk Factors” in the filings we make with the Securities and Exchange Commission (“SEC”) from time to time, which are available on our website at http://investors.BlackLine.com and on the SEC’s website at www.sec.gov. Except as required by law, BlackLine does not undertake any obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future developments or otherwise.

In addition, statements that “we believe” and similar statements reflect our beliefs and opinions on the relevant subject. These statements are based upon information available to us as of the date of this presentation, and while we believe such information forms a reasonable basis for such statements, such information may be limited or incomplete, and our statements should not be read to indicate that we have conducted an exhaustive inquiry into, or review of, all potentially available relevant information. These statements are inherently uncertain and investors are cautioned not to unduly rely upon these statements.

In addition to U.S. GAAP financials, this document includes certain non-GAAP financial measures, including non-GAAP revenue, gross profit, gross margin, free cash flow, sales and marketing expense, research and development expense, general and administrative expense, loss from operations and operating margin (loss). These non-GAAP measures are in addition to, not a substitute for or superior to, measures of financial performance prepared in accordance with U.S. GAAP. The non-GAAP financial measures we use may differ from the non-GAAP financial measures used by other companies.