# EDGAR Filing Document

**Accession Number:** 0001666134
**File Stem:** 0001193125-25-328789
**Filing Date:** 2025-12
**Character Count:** 7434
**Document Hash:** 7420e406e1de2084ee79691d9e31b955
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-328789.hdr.sgml**: 20251222

**ACCESSION NUMBER**: 0001193125-25-328789

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 13

**CONFORMED PERIOD OF REPORT**: 20251219

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20251222

**DATE AS OF CHANGE**: 20251222

**FILER**: 

**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:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-37924
- **FILM NUMBER:** 251592749

**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

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of Report (Date of earliest event reported)

#### December 19, 2025

## BLACKLINE, INC.

#### (Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-37924** | **46-3354276** |
| **(State or other jurisdiction**<br> **of incorporation)** | **(Commission**<br> **File Number)** | **(I.R.S. Employer**<br> **Identification Number)** |

---

#### 21300 Victory Boulevard, 12<sup>th</sup> Floor

#### Woodland Hills, California 91367

#### (Address of principal executive offices) (Zip Code)
(818) 223-9008

#### (Registrant's telephone number, including area code)

#### Not Applicable

#### (Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | |
|:---|:---|
| **Title of each class** | **Name of each exchange**<br> **on which registered** |
| Common Stock, $0.01, par value BL | The Nasdaq Global Select Market |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

---

| | |
|:---|:---|
| **Item 5.02** | **Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.**  |

---

On December 19, 2025, Thomas Unterman informed the Company's board of directors (the "Board") of his decision not to stand for re-election as a member of the Board at the Company's 2026 annual meeting of stockholders (the "Annual Meeting"). Mr. Unterman will continue to serve as a director and member of the Board's Compensation Committee and the Nominating and Corporate Governance Committee until the completion of his term. Mr. Unterman's decision not to stand for re-election as a member of the Board is not the result of any disagreement with the Company on any matter.

The Board confirmed that it expects to reduce the size of the Board from 12 directors to 11 directors immediately following the election of directors at the Annual Meeting.

---

| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.**  |

---

(d) Exhibits

---

| | |
|:---|:---|
| **Exhibit**<br> **Number** | **Description** |
| 99.1 | [Press Release issued by BlackLine, Inc., dated December 22, 2025](d67115dex991.htm) |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document) |

---

------

#### SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **BLACKLINE, INC.** | **BLACKLINE, INC.** |
| Date: December 22, 2025 | By: | /s/ Karole Morgan-Prager |
|  |  | Karole Morgan-Prager |
|  |  | Chief Legal and Administrative Officer |

---

## Exhibit 99.1

**Exhibit 99.1** 

**BlackLine Board Member Tom Unterman Announces Intention to Retire** 

**LOS ANGELES – December 22, 2025 –** BlackLine (Nasdaq: BL) ("BlackLine" or the "Company") today announced that Tom Unterman has informed the Company that he intends to retire and will not stand for re-election to the BlackLine Board of Directors at the Company's next Annual Meeting of Stockholders in May 2026. Mr. Unterman has served on the Board since 2010, providing invaluable guidance and strategic oversight during his tenure.

"On behalf of the entire Board, I want to thank Tom for his many years of dedicated service to BlackLine, our Board and our shareholders," said Owen Ryan, CEO and Chairman of the Board of BlackLine. "His exceptional insights and unique perspective on strengthening our position within the Office of the CFO have been invaluable to the Board and pivotal in guiding BlackLine to the leadership position it holds today."

"Tom has had a tremendous impact on BlackLine since joining the Board," said Therese Tucker, Founder and Director of BlackLine. "He has been more than just a Board member; he has been a trusted advisor, a mentor and a friend. His deep belief in BlackLine's potential has left a mark on our Company and on me personally, and for that I am so grateful. His wisdom and steady leadership will be missed."

"It has been a honor to serve on BlackLine's Board," said Unterman. "It was my privilege to be a director as it grew from a startup to the leader in the transformation of the Office of the CFO. I am very confidant of its future and will remain a strong supporter."

The Company also announced that its Board of Directors expects to reduce the size of the Board to 11 directors immediately following the election of directors at the 2026 Annual Meeting of Stockholders.

**About BlackLine** 

For more information, please visit blackline.com.

**Investor Relations Contact:** 

Matt Humphries, CFA

<u>matt.humphries@blackline.com</u> 

**Media Contact** 

Samantha Darilek

<u>samantha.darilek@blackline.com</u>