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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
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FORM 8-K
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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 7, 2025
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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
of incorporation) | (Commission File Number) | (IRS Employer
Identification No.) |
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| 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)
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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)
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| o | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) |
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| o | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) |
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| o | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |
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| o | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) |
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| 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 o
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. o
Item 2.02 Results of Operations and Financial Condition.
On November 7, 2025 we issued a press release announcing third quarter of 2025 results. A copy of the press release is included in this Current Report on Form 8-K as Exhibit 99.1 and is furnished herewith.
Item 9.01 Financial Statements and Exhibits.
(d)Exhibits.
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| | Press Release dated November 7, 2025 |
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| 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.
Dated: November 7, 2025
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| KOPPERS HOLDINGS INC. |
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| By: | | /s/ Jimmi Sue Smith |
| | | Jimmi Sue Smith |
| | | Chief Financial Officer and Treasurer |