# EDGAR Filing Document

**Accession Number:** 0001315257
**File Stem:** 0001315257-25-000006
**Filing Date:** 2025-11
**Character Count:** 9789
**Document Hash:** ef6c8b9789f9c7ad265b3b0a4cf6ec9c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001315257-25-000006.hdr.sgml**: 20251105

**ACCESSION NUMBER**: 0001315257-25-000006

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 14

**CONFORMED PERIOD OF REPORT**: 20251105

**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**: 20251105

**DATE AS OF CHANGE**: 20251105

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Koppers Holdings Inc.
- **CENTRAL INDEX KEY:** 0001315257
- **STANDARD INDUSTRIAL CLASSIFICATION:** LUMBER & WOOD PRODUCTS (NO FURNITURE) [2400]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 201878963
- **STATE OF INCORPORATION:** PA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-32737
- **FILM NUMBER:** 251454646

**BUSINESS ADDRESS:**
- **STREET 1:** 436 SEVENTH AVENUE
- **CITY:** PITTSBURGH
- **STATE:** PA
- **ZIP:** 15219
- **BUSINESS PHONE:** 412-227-2001

**MAIL ADDRESS:**
- **STREET 1:** 436 SEVENTH AVENUE
- **CITY:** PITTSBURGH
- **STATE:** PA
- **ZIP:** 15219

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** KI Holdings Inc.
- **DATE OF NAME CHANGE:** 20050124

?xml version='1.0' encoding='ASCII'? kop-20251105

**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): November 5, 2025**

_________________________________________________________

**KOPPERS HOLDINGS INC.**

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

_________________________________________________________

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| | | |
|:---|:---|:---|
| **Pennsylvania** | **1-32737** | **20-1878963** |
| **(State or other jurisdiction<br>of incorporation)** | **(Commission File Number)** | **(IRS Employer<br>Identification No.)** |
| **436 Seventh Avenue** | | |
| **Pittsburgh, Pennsylvania** | | **15219** |
| **(Address of principal executive offices)** | | **(Zip Code)** |

---

**Registrant's telephone number, including area code: (412) 227-2001**

**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: (see General Instruction A.2. below)

□ 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))

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading Symbol(s)** | **Name of each exchange on which registered** |
| Common Stock | KOP | The New York Stock Exchange |

---

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. □

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

On November 5, 2025, the Board of Directors (the "Board") of Koppers Holdings Inc. (the "Company") increased the size of the Board from eight to nine directors and elected Laura Posadas as a director of the Company. The committees on which Ms. Posadas will serve have not been determined. Ms. Posadas will receive compensation for her services as a non-employee director in accordance with the Company's standard compensatory arrangement described in the Company's Definitive Proxy Statement for its 2025 Annual Meeting under the caption "Director Compensation" filed pursuant to Regulation 14A with the Securities and Exchange Commission on March 28, 2025.

Since October 2024, Ms. Posadas has served as Chief Executive Officer of Canlak Coatings Inc., a formulator and manufacturer of high-quality wood coating systems. Ms. Posadas served as Chief Commercial Officer of Matrix Adhesives Group, a provider of advanced adhesive and sealant solutions, from January 2023 to October 2024 and as Regional President, Americas of Castrol for BP p.l.c., the global integrated energy company, from December 2019 to December 2022.

The Board has determined that Ms. Posadas is an independent director under applicable New York Stock Exchange listing requirements and the Board's own independence standards, which are included in the Company's Corporate Governance Guidelines. Ms. Posadas will stand for election by the Company's shareholders at the Company's 2026 Annual Meeting.

There are no transactions between Ms. Posadas and the Company that would be reportable under Item 404(a) of Regulation S-K, and there is no arrangement or understanding with any person pursuant to which Ms. Posadas was selected as a director.

The Company issued a press release on November 5, 2025 regarding the election of Ms. Posadas as a director. A copy of the press release is furnished herewith as Exhibit 99.1.

**Item 9.01 Financial Statements and Exhibits.**

(d)Exhibits.

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| | |
|:---|:---|
| <u>[99.1](ex991newboardmember.htm)</u> | Press Release dated November 5, 2025 |
| 104 | Cover Page Interactive Data File (embedded within the Inline XBRL document). |

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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.

**Dated: November 5, 2025**

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| | |
|:---|:---|
| KOPPERS HOLDINGS INC. | KOPPERS HOLDINGS INC. |
| By: | /s/ Jimmi Sue Smith |
|  | Jimmi Sue Smith |
|  | Chief Financial Officer and Treasurer |

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## Exhibit 99.1

**Exhibit 99.1**

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| | |
|:---|:---|
| News Release<br>**FOR IMMEDIATE RELEASE**<br>For Information:<br>Quynh McGuire<br>Vice President, Investor Relations<br>412 227 2049<br><u>McGuireQT@koppers.com</u> | ![a1.jpg](a1.jpg)<br>**Koppers Holdings Inc.**<br>436 Seventh Avenue<br>Pittsburgh, PA 15219-1800<br>Tel 412 227 2001<br>www.koppers.com |

---

**Koppers Holdings Names Laura Posadas to Board**

***Company Expands Board of Directors from Eight to Nine Members***

**PITTSBURGH, November 5, 2025** — Koppers Holdings Inc. (NYSE: KOP), an integrated global provider of treated wood products, wood treatment chemicals, and carbon compounds, today announced that the company has increased the size of its Board of Directors from eight to nine members and has elected Laura Posadas as a director of the company, effective November 5, 2025.

Ms. Posadas currently serves as Chief Executive Officer of Canlak Coatings Inc., a portfolio company of SK Capital Partners and leading formulator and manufacturer of high-quality wood coating systems. An accomplished executive with more than 20 years of experience in global leadership roles within the specialty chemicals industry, Ms. Posadas has a proven ability to drive innovation, operational excellence and strategic growth.

She also serves on the Board of Directors and chairs the advisory arm of Coqual, a global think tank that helps companies redesign how they work and lead. Ms. Posadas holds a degree in chemistry from The University of Delaware.

Koppers Board Chair and Chief Executive Officer Leroy Ball added, "I'm happy to welcome Laura as the latest high-quality addition to our Board. She is the latest example of how we have worked to refresh the backgrounds and skillsets of our board members to better reflect the future direction of Koppers. Laura's record of driving growth and innovation is especially exciting as we seek to build around our higher performing businesses. On behalf of the Board, we are all excited to have her joining us and look forward to the positive contribution she will make to our continued transformation."

###

**About Koppers**

Koppers (NYSE: KOP) is an integrated global provider of essential treated wood products, wood preservation technologies and carbon compounds. Our team of approximately 1,850 employees create, protect and preserve key elements of our global infrastructure – including railroad crossties, utility poles, outdoor wooden structures, and production feedstocks for steel, aluminum and construction materials, among others – applying decades of industry-leading expertise while constantly innovating to anticipate the needs of tomorrow. Together we are providing safe and sustainable solutions to enable rail transportation, keep power flowing, and create spaces of enjoyment for people everywhere. Protecting What Matters, Preserving The Future. Learn more at Koppers.com.

Inquiries from the media should be directed to Ms. Jessica Franklin Black at BlackJF@koppers.com or 412-227-2025. Inquiries from the investment community should be directed to Ms. Quynh McGuire at McGuireQT@koppers.com or 412-227-2049.

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