Trust is in the Balance

Proxy

2024 ANNUAL MEETING OF STOCKHOLDERS

Annual Meeting of Stockholders
Proxy Materials

The annual meeting of stockholders of BlackLine, Inc. will be held on May 09, 2024 at 9:00 a.m. Pacific Time.

The annual meeting will be a virtual meeting held over the Internet. 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/BL2024 and entering your sixteen-digit control number located on your proxy card.

 

Proxy Materials for the 2024 Annual Meeting of Stockholders:

Stockholders of Record:

You are a "stockholder of record" if, at the close of business on the Record Date for the annual meeting, your shares were registered directly in your name with our transfer agent, Equiniti Trust Company, LLC (previously known as American Stock Transfer & Trust Company, LLC). You should have received from Broadridge Financial Solutions, Inc. a Notice of Internet Availability of Proxy Materials. As a stockholder of record, you have the right to grant your voting proxy directly to the individuals listed on the proxy card, to vote electronically at the virtual annual meeting, or by Internet or by telephone, or, if you received paper copies of the proxy materials by mail, to vote by mail by following the instructions on the proxy card or voting instruction card. If you are a stockholder of record, you may vote in one of the following ways:

Electronically at the annual meeting: If you plan to attend the virtual annual meeting, you may vote by proxy or electronically at the annual meeting.

Mail: To vote by mail, complete, sign and date the proxy card that accompanies this proxy statement and return it promptly in the postage-prepaid envelope provided (if you received printed proxy materials). Your completed, signed and dated proxy card must be received prior to the annual meeting.

Telephone: To vote over the telephone, call toll-free 1-800-690-6903 and follow the instructions. Have your Notice of Internet Availability or proxy card available when you call. You will be asked to provide the control number from your Notice of Internet Availability or proxy card. Telephone voting is available 24 hours a day, 7 days a week, until 11:59 p.m., Eastern time, on Wednesday, May 8, 2024.

Online: To vote via the Internet, go to www.proxyvote.com to complete an electronic proxy card (have your Notice of Internet Availability or proxy card in hand when you visit the website). You will be asked to provide the control number from your Notice of Internet Availability or proxy card. Internet voting is available 24 hours a day, 7 days a week, until 11:59 p.m., Eastern time, on Wednesday, May 8, 2024.

Beneficial Stockholders:

You are a "beneficial stockholder" if on the record date you held your shares through a broker, bank or other nominee. Beneficial stockholders are also referred to as owning their shares in "street name."

You should have received from your broker, bank or other nominee a Notice of Availability of Proxy Materials.

In order to vote your shares, you will need the control number(s) printed on the Notice(s) of Availability of Proxy Materials you received.