# EDGAR Filing Document

**Accession Number:** 0001315257
**File Stem:** 0001315257-25-000014
**Filing Date:** 2025-12
**Character Count:** 7139
**Document Hash:** 026e245657eb71e16fc2f9c109e5d01d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001315257-25-000014.hdr.sgml**: 20251203

**ACCESSION NUMBER**: 0001315257-25-000014

**CONFORMED SUBMISSION TYPE**: 8-K/A

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20241108

**ITEM INFORMATION**: Cost Associated with Exit or Disposal Activities

**FILED AS OF DATE**: 20251203

**DATE AS OF CHANGE**: 20251203

**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/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-32737
- **FILM NUMBER:** 251546935

**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-20241108

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

_________________________________________________________

**FORM 8-K/A**

**(Amendment No. 1)**

_________________________________________________________

**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 8, 2024**

_________________________________________________________

**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)** |

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**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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**Explanatory Note**

This amended Current Report on Form 8-K (this "Amendment") is being filed by Koppers Holdings Inc. (the "Company") for the purpose of amending Item 2.05 of that certain Current Report on Form 8-K originally filed by the Company on November 8, 2024 (the "Original Form 8-K") in connection with its workforce reduction program in the U.S. As noted in the Original Form 8-K, all of the specific cost reduction actions related to the workforce reduction program were not fully defined and the Company was unable at the time to make a good faith determination of the cost estimates, or ranges of cost estimates, associated with actions to be implemented in connection with the workforce reduction program. This Amendment is being filed to provide updates on the Company's additional cost estimates or ranges of cost estimates. Except as described below, all other information in the Original Form 8-K remains unchanged.

**Item 2.05 Costs Associated with Exit or Disposal Activities.**

The Company estimates pre-tax restructuring charges, employee severance charges and related benefit costs for actions associated with the workforce reduction program to be in the range of $4 million to $5 million, which the Company anticipates will result in future cash expenditures of approximately $1 million.

In accordance with paragraph (d) of Item 2.05, the Company will timely file additional amendment(s) to this Current Report on Form 8-K should any of the information previously disclosed need to be updated.

**Safe Harbor Statement**

Certain statements in this Current Report on Form 8-K are "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 and may include, but are not limited to, statements about the Company's cost reduction efforts, including the Company's workforce reduction program, and the resulting restructuring charges, employee severance charges and related benefit costs. All forward-looking statements involve risks and uncertainties. Actual results, performance or achievements may differ materially from anticipated results, performance or achievements. Factors that might affect such forward-looking statements include, among other things, the risk that timing for completion of these actions may be delayed, or the risk that restructuring, employee severance or related benefit expenses may be more or less than anticipated, as well as those discussed more fully elsewhere in this report and in documents filed with the Securities and Exchange Commission by the Company, particularly our latest annual report on Form 10-K and any subsequent filings by the Company with the Securities and Exchange Commission. Any forward-looking statements in this report speak only as of the date of this report, and we undertake no obligation to update any forward-looking statement to reflect events or circumstances after that date or to reflect the occurrence of unanticipated events.

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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: December 3, 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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