# EDGAR Filing Document

**Accession Number:** 0001666134
**File Stem:** 0001140361-23-014252
**Filing Date:** 2023-3
**Character Count:** 2225
**Document Hash:** 21124623ec7c7e4ec8c8bc49b91268e9
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-23-014252.hdr.sgml**: 20230328

**ACCESSION NUMBER**: 0001140361-23-014252

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20230328

**DATE AS OF CHANGE**: 20230328

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BLACKLINE, INC.
- **CENTRAL INDEX KEY:** 0001666134
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **IRS NUMBER:** 463354276
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37924
- **FILM NUMBER:** 23769819

**BUSINESS ADDRESS:**
- **STREET 1:** 21300 VICTORY BOULEVARD
- **STREET 2:** 12TH FLOOR
- **CITY:** WOODLAND HILLS
- **STATE:** CA
- **ZIP:** 91367
- **BUSINESS PHONE:** 818-223-9008

**MAIL ADDRESS:**
- **STREET 1:** 21300 VICTORY BOULEVARD
- **STREET 2:** 12TH FLOOR
- **CITY:** WOODLAND HILLS
- **STATE:** CA
- **ZIP:** 91367

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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### <br>

### SCHEDULE 14A

#### PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE

#### SECURITIES EXCHANGE ACT OF 1934

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

---

| | |
|:---|:---|
| ☐ | Preliminary Proxy Statement |
| ☐ | **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))** |
| ☐ | Definitive Proxy Statement |
| ☒ | Definitive Additional Materials |
| ☐ | Soliciting Material Pursuant to §240.14a-12 |
| **BLACKLINE, INC.** | **BLACKLINE, INC.** |
| **(Name of Registrant as Specified in Its Charter)** | **(Name of Registrant as Specified in Its Charter)** |
| **(Name of Person(s) Filing Proxy Statement, if other than the Registrant)** | **(Name of Person(s) Filing Proxy Statement, if other than the Registrant)** |

---

Payment of Filing Fee (Check the appropriate box):

☒ No fee required.

☐ Fee paid previously with preliminary materials.

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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