Company: BL
Filing Date: 2025-03-27
Form Type: DEF 14A
Source: 0001666134-25-000011
Chunk: 11

Company: BLACKLINE, INC.
Filing Date: 2025-03-27
Form: DEF 14A
Chunk 11
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 executive officers, and Proposal No. 4 relating to the frequency of future advisory votes to approve the compensation of our named executive officers.

#### How can I contact BlackLine’s transfer agent?
You may contact our transfer agent, Equiniti Trust Company, LLC, by telephone at (800) 937-5449 (toll-free for United States residents), or by e-mail at helpAST@equiniti.com. Materials may be mailed to Equiniti Trust Company, LLC at:

<div align='center'>Equiniti Trust Company, LLC

PO Box 500

Newark, NJ 07101</div>

#### How can I attend the annual meeting?
The annual meeting will be a virtual meeting held online. You will be able to attend the virtual annual meeting, vote your shares electronically and submit your questions during the live webcast of the meeting by visiting www.virtualshareholdermeeting.com/BL2025 and entering the sixteen-digit control number located on your Notice of Internet Availability or, if you received printed proxy materials, your proxy card or voting instruction card. The annual meeting webcast will begin promptly at 9:00 a.m. Pacific time. We encourage you to access the meeting prior to the start time. Online check-in will begin at 8:45 a.m. Pacific time, and you should allow ample time for the check-in procedures. You will have the same rights and opportunities that would be afforded by an in-person meeting.

Beneficial Owner of Shares Held in “Street Name”: Shares Registered in the Name of a Broker, Bank or Other Nominee . If you were a beneficial owner of shares that are held in “street name” at the close of business on the Record Date, you may not be able to vote your shares electronically at the virtual annual meeting unless you obtain a legal proxy from your broker, bank or other nominee who is the stockholder of record with respect to your shares. You may still attend the virtual annual meeting even if you do not have a legal proxy. For admission to the virtual annual meeting, visit www.virtualshareholdermeeting.com/BL2025 and enter the sixteen-digit control number located on your proxy card.

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TABLE OF CONTENTS

How are proxies solicited for the annual meeting and who is paying for such solicitation?

Our directors, officers, and employees may solicit proxies on behalf of the Board in person, by mail, telephone, fax, and other electronic means. No additional compensation will be paid to these individuals for