KOP · NYSE · CIK 0001315257

Koppers Holdings Inc.

Koppers Holdings Inc.’s most recent SEC filing in our snapshot is a Form SCHEDULE 13D/A filed on Oct 22, 2026. In fiscal 2025 (year ended Dec 31, 2025) it reported revenue of $1.9B and net income of $56.0M, according to its XBRL data on EDGAR. Its EDGAR record lists 65 Form 4 insider filings from the 12 months before our last refresh.

SEC EDGAR snapshot updated Oct 27, 2026, 11:27 PM EDT. See all filings on sec.gov.

Revenue, FY2025
$1.9B
Net income, FY2025
$56.0M
Form 4 filings on record, past 12 months
65

Company overview

Legal name (as filed)
Koppers Holdings Inc.
Ticker
KOP
SEC Central Index Key (CIK)
0001315257
Industry (SIC)
Lumber & Wood Products (No Furniture) (code 2400)
Business address
PITTSBURGH, PA
State or country of incorporation
PA
Fiscal year ends
December 31
SEC filer category
Large accelerated filer
Position in SEC ticker list
#2600 of the 3,000 companies we track

Five-year financial highlights

Full-year figures from Koppers Holdings Inc.’s annual reports, as tagged in XBRL and published by the SEC. Amounts are in U.S. dollars; the fiscal year is named for the calendar year in which it ends.

Revenue
$1.7BFY2021$2.0BFY2022$2.2BFY2023$2.1BFY2024$1.9BFY2025
Net income
$85.2MFY2021$63.4MFY2022$89.2MFY2023$52.4MFY2024$56.0MFY2025
KOP annual results
ItemFY2021
ended Dec 31, 2021		FY2022
ended Dec 31, 2022		FY2023
ended Dec 31, 2023		FY2024
ended Dec 31, 2024		FY2025
ended Dec 31, 2025
Revenue$1.7B$2.0B$2.2B$2.1B$1.9B
Net income$85.2M$63.4M$89.2M$52.4M$56.0M
Diluted EPS$3.88$2.98$4.14$2.46$2.74
Total assets$1.7B$1.7B$1.8B$1.9B$1.9B
Cash and equivalents$45.5M$33.3M$66.5M$43.9M$38.0M

XBRL tags used: revenue = RevenueFromContractWithCustomerExcludingAssessedTax; netIncome = NetIncomeLoss; assets = Assets; eps = EarningsPerShareDiluted; cash = CashAndCashEquivalentsAtCarryingValue. EPS is shown as originally reported for each year and may not be adjusted for later stock splits. A dash means the company did not report that item in a form we could match.

How to read these numbers

Revenue is the money a company brings in from selling its products and services; net income is what is left after all expenses, interest and taxes. Diluted EPS spreads net income across every share that could exist if options and convertible securities were exercised. Total assets and cash are balance-sheet figures measured on the last day of the fiscal year. For the full story — segment results, one-time charges, guidance — read Management’s Discussion and Analysis in the Form 10-K.

Latest key reports

The most recent filing of each major report type, even if it falls outside the 40 newest filings below.

KOP latest annual, quarterly, current and proxy reports
FiledFormWhat it isOriginal
Feb 26, 202610-KAnnual report· period Dec 31, 2025Document · Index
Aug 6, 202610-QQuarterly report· period Jun 30, 2026Document · Index
Aug 6, 20268-KResults of operations· period Aug 6, 2026Document · Index
Mar 27, 2026DEF 14ADefinitive proxy statement· period May 7, 2026Document · Index

Recent SEC filings

The 40 newest documents filed by or about Koppers Holdings Inc., by form type:

4 ×26144 ×4SCHEDULE 13G/A ×48-K ×23 ×1SCHEDULE 13D/A ×110-Q ×1SCHEDULE 13D ×1
KOP recent filings
FiledFormWhat it isOriginal
Oct 22, 2026SCHEDULE 13D/AActive beneficial ownership report (over 5%)Document · Index
Oct 19, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
Oct 8, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
Sep 15, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 14, 2026Document · Index
Sep 15, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 14, 2026Document · Index
Sep 15, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 14, 2026Document · Index
Sep 15, 20264Statement of changes in beneficial ownership (insider trade)· period Sep 14, 2026Document · Index
Sep 1, 20264Statement of changes in beneficial ownership (insider trade)· period Aug 31, 2026Document · Index
Aug 20, 20264Statement of changes in beneficial ownership (insider trade)· period Aug 19, 2026Document · Index
Aug 13, 20264Statement of changes in beneficial ownership (insider trade)· period Aug 12, 2026Document · Index
Aug 12, 2026144Notice of proposed sale of securitiesDocument · Index
Aug 12, 20264Statement of changes in beneficial ownership (insider trade)· period Aug 11, 2026Document · Index
Aug 11, 2026144Notice of proposed sale of securitiesDocument · Index
Aug 11, 20264Statement of changes in beneficial ownership (insider trade)· period Aug 10, 2026Document · Index
Aug 11, 20264Statement of changes in beneficial ownership (insider trade)· period Aug 7, 2026Document · Index
Aug 10, 2026144Notice of proposed sale of securitiesDocument · Index
Aug 7, 2026144Notice of proposed sale of securitiesDocument · Index
Aug 6, 202610-QQuarterly report· period Jun 30, 2026Document · Index
Aug 6, 20268-KResults of operations· period Aug 6, 2026Document · Index
Jul 31, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
Jun 23, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 18, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 17, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 15, 2026Document · Index
Jun 15, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 11, 2026Document · Index
Jun 4, 20264Statement of changes in beneficial ownership (insider trade)· period Jun 3, 2026Document · Index
May 27, 20264Statement of changes in beneficial ownership (insider trade)· period May 26, 2026Document · Index
May 27, 20263Initial statement of beneficial ownership· period May 26, 2026Document · Index
May 19, 2026SCHEDULE 13DActive beneficial ownership report (over 5%)Document · Index
May 14, 20264Statement of changes in beneficial ownership (insider trade)· period May 12, 2026Document · Index
May 14, 20264Statement of changes in beneficial ownership (insider trade)· period May 13, 2026Document · Index
May 13, 2026SCHEDULE 13G/APassive beneficial ownership report (over 5%)Document · Index
May 11, 20264Statement of changes in beneficial ownership (insider trade)· period May 7, 2026Document · Index
May 11, 20264Statement of changes in beneficial ownership (insider trade)· period May 7, 2026Document · Index
May 11, 20264Statement of changes in beneficial ownership (insider trade)· period May 7, 2026Document · Index
May 11, 20264Statement of changes in beneficial ownership (insider trade)· period May 7, 2026Document · Index
May 11, 20264Statement of changes in beneficial ownership (insider trade)· period May 7, 2026Document · Index
May 11, 20264Statement of changes in beneficial ownership (insider trade)· period May 7, 2026Document · Index
May 11, 20268-KDirector or officer change; Regulation FD disclosure· period May 11, 2026Document · Index

Insider filing activity

65 Form 4 filings appear in Koppers Holdings Inc.’s EDGAR record between Oct 28, 2025 and our last refresh. Most are reports by the company’s own directors, officers and 10% owners, but EDGAR also lists a Form 4 under a company when the company itself is the insider — for example, when it owns more than 10% of another public company. Foreign private issuers’ own insiders generally do not file Form 4. A high count is not by itself a signal: many Form 4s report routine stock awards, tax withholding or sales under pre-arranged Rule 10b5-1 plans. Open each filing to see the transaction code, share count and price. What a Form 4 shows.

Other companies in Lumber & Wood Products (No Furniture)

All 3 companies in Lumber & Wood Products (No Furniture)· Companies headquartered in Pennsylvania

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Source

  • U.S. Securities and Exchange Commission, EDGAR submissions for CIK 0001315257 and XBRL company facts. Koppers Holdings Inc. on EDGAR.
  • Snapshot updated Oct 27, 2026, 11:27 PM EDT. The SEC does not endorse OpenFilings. Company names and tickers are used only to identify the filer; no logos are shown.

Not investment advice. This page summarizes public SEC filings for information only. Figures may contain errors or omissions; confirm everything in the original filing before relying on it.