# EDGAR Filing Document

**Accession Number:** 0001559771
**File Stem:** 0000921895-26-000107
**Filing Date:** 2026-1
**Character Count:** 6285
**Document Hash:** 764acc6e271fe1e51db360f973df5ef7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000921895-26-000107.hdr.sgml**: 20260120

**ACCESSION NUMBER**: 0000921895-26-000107

**CONFORMED SUBMISSION TYPE**: DFAN14A

**PUBLIC DOCUMENT COUNT**: 4

**FILED AS OF DATE**: 20260120

**DATE AS OF CHANGE**: 20260120

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BLACKLINE, INC.
- **CENTRAL INDEX KEY:** 0001666134
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 463354276
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DFAN14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37924
- **FILM NUMBER:** 26543613

**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
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Engaged Capital LLC
- **CENTRAL INDEX KEY:** 0001559771

**ORGANIZATION NAME:**
- **EIN:** 454591052
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** DFAN14A

**BUSINESS ADDRESS:**
- **STREET 1:** 610 NEWPORT CENTER DRIVE
- **STREET 2:** SUITE 950
- **CITY:** NEWPORT BEACH
- **STATE:** CA
- **ZIP:** 92660
- **BUSINESS PHONE:** 949-734-7900

**MAIL ADDRESS:**
- **STREET 1:** 610 NEWPORT CENTER DRIVE
- **STREET 2:** SUITE 950
- **CITY:** NEWPORT BEACH
- **STATE:** CA
- **ZIP:** 92660

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**SCHEDULE 14A**

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

(Amendment No.)

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;☒ Soliciting Material Under § 240.14a-12

---

| |
|:---|
| BLACKLINE, INC. |
| (Name of Registrant as Specified In Its Charter) |
| ENGAGED CAPITAL FLAGSHIP MASTER FUND, LP<br> ENGAGED CAPITAL, LLC<br> ENGAGED CAPITAL HOLDINGS, LLC<br> GLENN W. WELLING<br> STORM DUNCAN<br> CHRISTOPHER HALLENBECK<br> CHRISTOPHER B. HETRICK<br> CHRISTOPHER L. YOUNG |
| (Name of Persons(s) Filing Proxy Statement, if other than the Registrant) |

---

Payment of Filing Fee (Check all boxes that apply):

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;☒ 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

Engaged Capital, LLC ("Engaged Capital"), together with the other participants named herein, intends to file a preliminary proxy statement and accompanying **BLUE** universal proxy card with the Securities and Exchange Commission to be used to solicit votes for the election of its slate of highly qualified director nominees at the 2026 annual meeting of stockholders (the "Annual Meeting") of BlackLine, Inc., a Delaware corporation (the "Company").

Item 1: On the evening of January 16, 2026, Glenn W. Welling of Engaged Capital posted the following material to X (formerly known as Twitter):

![](image_001.jpg)

Item 2: Also on the evening of January 16, 2026, Glenn W. Welling of Engaged Capital posted the following material to LinkedIn:

![](image_002.jpg)

Item 3: On January 20, 2026, Engaged Capital posted certain materials to www.SaveBlackLine.com, which are attached hereto as Exhibit 1 and incorporated herein by reference.

**CERTAIN INFORMATION CONCERNING THE PARTICIPANTS**

Engaged Capital, LLC ("Engaged Capital"), together with the other participants named herein, intends to file a preliminary proxy statement and accompanying **BLUE** universal proxy card with the Securities and Exchange Commission ("SEC") to be used to solicit votes for the election of its slate of highly qualified director nominees at the 2026 annual meeting of stockholders of BlackLine, Inc., a Delaware corporation (the "Company").

ENGAGED CAPITAL STRONGLY ADVISES ALL STOCKHOLDERS OF THE COMPANY TO READ THE PROXY STATEMENT AND OTHER PROXY MATERIALS, INCLUDING A PROXY CARD, AS THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. SUCH PROXY MATERIALS WILL BE AVAILABLE AT NO CHARGE ON THE SEC'S WEB SITE AT HTTP://WWW.SEC.GOV. IN ADDITION, THE PARTICIPANTS IN THIS PROXY SOLICITATION WILL PROVIDE COPIES OF THE PROXY STATEMENT WITHOUT CHARGE, WHEN AVAILABLE, UPON REQUEST. REQUESTS FOR COPIES SHOULD BE DIRECTED TO THE PARTICIPANTS' PROXY SOLICITOR.

The participants in the anticipated proxy solicitation are expected to be Engaged Capital Flagship Master Fund, LP ("Engaged Capital Flagship Master"), Engaged Capital, Engaged Capital Holdings, LLC ("Engaged Holdings"), Glenn W. Welling, Storm Duncan, Christopher Hallenbeck, Christopher L. Young and Christopher B. Hetrick.

As of the date hereof, Engaged Capital Flagship Master directly beneficially owns 1,015,619 shares of Common Stock, $0.01 par value per share (the "Common Stock"), of the Company. Engaged Capital, as the general partner and investment adviser of Engaged Capital Flagship Master, may be deemed to beneficially own the 1,015,619 shares of Common Stock owned by Engaged Capital Flagship Master. Engaged Holdings, as the managing member of Engaged Capital, may be deemed to beneficially own the 1,015,619 shares of Common Stock owned by Engaged Capital Flagship Master. Mr. Welling, as the Founder and Chief Investment Officer of Engaged Capital and sole member of Engaged Holdings, may be deemed to beneficially own the 1,015,619 shares of Common Stock owned by Engaged Capital Flagship Master. As of the date hereof, Messrs. Duncan, Hallenbeck, Young and Hetrick do not beneficially own any shares of Common Stock.

### Attached PDF Documents

**Attachment 1:** `ex1todfan14a09455064_012026.pdf`

_No text found in this document._