Company: BL
Filing Date: 2025-03-27
Form Type: DEF 14A
Source: 0001666134-25-000011
Chunk: 13

Company: BLACKLINE, INC.
Filing Date: 2025-03-27
Form: DEF 14A
Chunk 13
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 will continue to be able to access and receive separate proxy cards. Upon written or oral request, we will deliver promptly a separate copy of the Notice of Internet Availability and, if applicable, the proxy materials and annual report, to any stockholder at a shared address to which we delivered a single copy of any of these documents. To receive a separate copy, or, if you are receiving multiple copies, to request that we only send a single copy of next year’s proxy materials and annual report, you may contact us as follows:

<div align='center'>BlackLine, Inc.

Attention: Investor Relations

21300 Victory Boulevard, 12th Floor

Woodland Hills, CA 91367

Tel: (818) 223-9008</div>

Stockholders who hold shares in street name may contact their broker, bank or other nominee to request information about householding.

Is there a list of stockholders entitled to vote at the annual meeting?

The names of stockholders of record entitled to vote at the annual meeting will be available for ten days before the annual meeting during regular business hours at our corporate headquarters located at 21300 Victory Boulevard, 12th Floor, Woodland Hills, California 91367. Please contact our Corporate Secretary a reasonable time in advance to make appropriate arrangements, but in no event less than two business days in advance of your desired visiting time.

When are stockholder proposals due for next year’s annual meeting?

Please see the section entitled Stockholder Proposal Deadlines for 2026 Annual Meeting in this proxy statement for more information regarding the deadlines for the submission of stockholder proposals for our 2026 annual meeting.

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TABLE OF CONTENTS

Whom do I contact if I have questions about the Annual Meeting?

If you have any questions or require any assistance with voting your shares, please contact our proxy solicitor:

<div align='center'>430 Park Avenue, 14th Floor

New York, New York 10022

Stockholders Call Toll Free: (800) 662-5200

Brokers, Banks, Trustees and Other Nominees Call Collect: (203) 658-9400

Email: BL@info.sodali.com

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TABLE OF CONTENTS

### BOARD OF DIRECTORS AND CORPORATE GOVERNANCE

#### Composition of the Board
Our Board is currently comprised of eleven members, divided into three classes of directors, each serving staggered three-year terms. Upon expiration of the term of a class of