Company: BL
Filing Date: 2025-03-27
Form Type: DEF 14A
Source: 0001666134-25-000011
Chunk: 6

Company: BLACKLINE, INC.
Filing Date: 2025-03-27
Form: DEF 14A
Chunk 6
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 a legal proxy from your broker, bank or other nominee.

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TABLE OF CONTENTS

#### Can I change my vote or revoke my proxy?
Stockholder of Record: Shares Registered in Your Name. If you are a stockholder of record, you can change your vote or revoke your proxy by:

• entering a new vote by telephone or online (until the applicable deadline for each method as set forth above);

• returning a later-dated proxy card (which automatically revokes the earlier proxy);

• providing a written notice of revocation prior to the annual meeting to our corporate secretary at our principal executive offices as follows: BlackLine, Inc., 21300 Victory Boulevard, 12th Floor, Woodland Hills, California 91367, Attn: Corporate Secretary; or

• attending the virtual annual meeting and voting electronically. Attendance at the virtual annual meeting will not cause your previously granted proxy to be revoked unless you specifically so request or cast your vote electronically at the virtual annual meeting.

Beneficial Owner of Shares Held in “Street Name”: Shares Registered in the Name of a Broker, Bank or Other Nominee. If you are the beneficial owner of your shares, you must contact the broker, bank or other nominee holding your shares and follow their instructions to change your vote or revoke your proxy.

Why did I receive a notice in the mail regarding the Internet availability of the proxy materials instead of a paper copy of the full set of proxy materials?

In accordance with the rules of the Securities and Exchange Commission (“SEC”), we have elected to distribute our proxy materials, including the notice of annual meeting of stockholders, this proxy statement and our 2024 annual report, primarily via the Internet. As a result, we are mailing to our stockholders a Notice of Internet Availability instead of a paper copy of the proxy materials. The Notice of Internet Availability contains instructions on how to access our proxy materials online, how to vote on the proposals, how to request printed copies of the proxy materials and 2024 annual report, and how to request to receive all future proxy materials in printed form by mail or electronically by e-mail. We encourage stockholders to take advantage of the availability of the proxy materials on the Internet to help reduce our costs and the environmental impact of our annual meetings.

#### What is the effect of giving a proxy?
Proxies are solicited by and on behalf of our Board. The persons named in the proxy, Patrick Villanova, our Chief Financial Officer, and Karole Morgan-Prager,