Company: BL
Filing Date: 2025-03-27
Form Type: DEF 14A
Source: 0001666134-25-000011
Chunk: 5

Company: BLACKLINE, INC.
Filing Date: 2025-03-27
Form: DEF 14A
Chunk 5
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 obtain a legal proxy from your broker, bank or other nominee.

#### How can I vote my shares?
Stockholder of Record: Shares Registered in Your Name

If you are a stockholder of record, you may vote in one of the following ways:

• You may vote 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.

• You may vote by 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.

• You may vote by 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 7, 2025.

• You may vote 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 7, 2025.

Beneficial Owner of Shares Held in “Street Name”: Shares Registered in the Name of a Broker, Bank or Other Nominee

If you are a beneficial owner of shares held of record by a broker, bank or other nominee, you will receive voting instructions from your broker, bank or other nominee. You must follow your voting instructions in order to direct your broker, bank or other nominee on how to vote your shares. Beneficial owners should generally be able to vote by returning the voting instruction card to their broker, bank or other nominee, or by telephone or online. However, the availability of telephone or online voting will depend on the voting process of your broker, bank or other nominee. As discussed above, if you are a beneficial owner, you may not be able to vote your shares electronically at the annual meeting unless you obtain