# Koppers Holdings Inc.: overview

KOP · NYSE · CIK 1315257 · [Materials](/sectors/materials.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/kop.md) · [Financials](/companies/kop/financials.md) · [Filings](/companies/kop/filings.md) · [Insiders](/companies/kop/insiders.md)

Latest reported revenue: [$520.1m](/filings/0001315257-26-000048.md) for Q2 FY2026, three months to 2026-06-30, from the 10-Q filed Aug 6, 2026 (XBRL us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax, accession 0001315257-26-000048).

## Last eight quarters

| Line item | Unit | Q3 FY2024 (2024-09-30) | Q4 FY2024 (2024-12-31) | Q1 FY2025 (2025-03-31) | Q2 FY2025 (2025-06-30) | Q3 FY2025 (2025-09-30) | Q4 FY2025 (2025-12-31) | Q1 FY2026 (2026-03-31) | Q2 FY2026 (2026-06-30) |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [554](/filings/0001315257-25-000012.md) | [477 d](/filings/0001315257-26-000012.md) | [457](/filings/0001315257-26-000038.md) | [505](/filings/0001315257-26-000048.md) | [485](/filings/0001315257-25-000012.md) | [433 d](/filings/0001315257-26-000012.md) | [455](/filings/0001315257-26-000038.md) | [520](/filings/0001315257-26-000048.md) |
| Gross margin | % | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported |
| Operating margin | % | [9.0%](/filings/0001315257-25-000012.md) | [1.3% d](/filings/0001315257-26-000012.md) | [5.9%](/filings/0001315257-26-000038.md) | [7.7%](/filings/0001315257-26-000048.md) | [10.7%](/filings/0001315257-25-000012.md) | [11.5% d](/filings/0001315257-26-000012.md) | [4.8%](/filings/0001315257-26-000038.md) | [(31.9%)](/filings/0001315257-26-000048.md) |
| Net margin | % | [4.1%](/filings/0001315257-25-000012.md) | [(2.1%) d](/filings/0001315257-26-000012.md) | [(3.0%)](/filings/0001315257-26-000038.md) | [3.2%](/filings/0001315257-26-000048.md) | [4.9%](/filings/0001315257-25-000012.md) | [6.9% d](/filings/0001315257-26-000012.md) | [1.6%](/filings/0001315257-26-000038.md) | [(28.4%)](/filings/0001315257-26-000048.md) |
| Diluted EPS | $ per share | [1.09](/filings/0001315257-25-000012.md) | not reported | [(0.68)](/filings/0001315257-26-000038.md) | [0.81](/filings/0001315257-26-000048.md) | [1.17](/filings/0001315257-25-000012.md) | not reported | [0.35](/filings/0001315257-26-000038.md) | [(7.71)](/filings/0001315257-26-000048.md) |
| Free cash flow | $m | [14.4 d](/filings/0001315257-25-000012.md) | [56.1 d](/filings/0001315257-26-000012.md) | [(37.0)](/filings/0001315257-26-000038.md) | [38.4 d](/filings/0001315257-26-000048.md) | [37.6 d](/filings/0001315257-25-000012.md) | [28.5 d](/filings/0001315257-26-000012.md) | [34.9](/filings/0001315257-26-000038.md) | [37.7 d](/filings/0001315257-26-000048.md) |

- Revenue. XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Gross margin (gross profit / revenue). XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. Derived values: 9-month figure less the 6-month figure; 12-month figure less the 9-month figure; 6-month figure less the 3-month figure.

## Last five fiscal years

| Line item | Unit | FY2021 (2021-12-31) | FY2022 (2022-12-31) | FY2023 (2023-12-31) | FY2024 (2024-12-31) | FY2025 (2025-12-31) |
| --- | --- | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [1,679](/filings/0000950170-24-021787.md) | [1,981](/filings/0000950170-25-028542.md) | [2,154](/filings/0001315257-26-000012.md) | [2,092](/filings/0001315257-26-000012.md) | [1,879](/filings/0001315257-26-000012.md) |
| Gross margin | % | not reported | not reported | not reported | not reported | not reported |
| Operating margin | % | [9.3%](/filings/0000950170-24-021787.md) | [7.0%](/filings/0000950170-25-028542.md) | [9.1%](/filings/0001315257-26-000012.md) | [7.1%](/filings/0001315257-26-000012.md) | [8.9%](/filings/0001315257-26-000012.md) |
| Net margin | % | [5.1%](/filings/0000950170-24-021787.md) | [3.2%](/filings/0000950170-25-028542.md) | [4.1%](/filings/0001315257-26-000012.md) | [2.5%](/filings/0001315257-26-000012.md) | [3.0%](/filings/0001315257-26-000012.md) |
| Diluted EPS | $ per share | [3.88](/filings/0000950170-24-021787.md) | [2.98](/filings/0000950170-25-028542.md) | [4.14](/filings/0001315257-26-000012.md) | [2.46](/filings/0001315257-26-000012.md) | [2.74](/filings/0001315257-26-000012.md) |
| Free cash flow | $m | [(22.0)](/filings/0000950170-24-021787.md) | [(3.0)](/filings/0000950170-25-028542.md) | [25.6](/filings/0001315257-26-000012.md) | [42.0](/filings/0001315257-26-000012.md) | [67.5](/filings/0001315257-26-000012.md) |

- Revenue. XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Gross margin (gross profit / revenue). XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment.

Each value links to the filing it came from. d marks a derived value. A ratio is not reported when any input is missing.

## Insider purchases and sales

The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/kop/insiders.md)

None in coverage.

## Funds that report holding it

From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md)

| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | --- | --- |
| [BlackRock, Inc.](/funds/2012383.md) | 2026-06-30 | $136.8m | 3,047,603 |  | Added +2,491 |
| [Simcoe Capital Management, LLC](/funds/1633362.md) | 2026-06-30 | $63.6m | 1,416,160 |  | Added +471,730 |
| [DIMENSIONAL FUND ADVISORS LP](/funds/354204.md) | 2026-06-30 | $55.6m | 1,237,249 |  | Added +45,891 |
| [PZENA INVESTMENT MANAGEMENT LLC](/funds/1027796.md) | 2026-06-30 | $47.7m | 1,061,285 |  | Reduced −148,091 |
| [FULLER & THALER ASSET MANAGEMENT, INC.](/funds/1082327.md) | 2026-06-30 | $42.4m | 943,279 |  | Reduced −35,311 |
| [AMERICAN CENTURY COMPANIES INC](/funds/748054.md) | 2026-06-30 | $38.1m | 848,068 |  | Added +313,066 |
| [VANGUARD CAPITAL MANAGEMENT LLC](/funds/2100119.md) | 2026-06-30 | $36.5m | 812,629 |  | Reduced −27,817 |
| [STATE STREET CORP](/funds/93751.md) | 2026-06-30 | $36.1m | 804,553 |  | Added +52,289 |
| [VANGUARD PORTFOLIO MANAGEMENT LLC](/funds/2100121.md) | 2026-06-30 | $24.2m | 539,047 |  | Added +8,515 |
| [GEODE CAPITAL MANAGEMENT, LLC](/funds/1214717.md) | 2026-06-30 | $21.7m | 483,417 |  | Added +15,808 |

## Recent filings

[All 1,697 filings](/companies/kop/filings.md)

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-22 | 18:28 ET | [SCHEDULE 13D/A](/filings/0000921895-26-002844.md) | Ownership report, active investor, amended | 0000921895-26-002844 |
| 2026-08-06 | 12:05 ET | [10-Q](/filings/0001315257-26-000048.md) | Quarterly report, period 2026-06-30 | 0001315257-26-000048 |
| 2026-08-06 | 08:14 ET | [8-K](/filings/0001315257-26-000046.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0001315257-26-000046 |
| 2026-05-19 | 17:33 ET | [SCHEDULE 13D](/filings/0000921895-26-001441.md) | Ownership report, active investor | 0000921895-26-001441 |
| 2026-05-11 | 09:05 ET | [8-K](/filings/0001315257-26-000041.md) | 5.02 Departure or appointment of officers or directors; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001315257-26-000041 |
| 2026-05-08 | 12:05 ET | [10-Q](/filings/0001315257-26-000038.md) | Quarterly report, period 2026-03-31 | 0001315257-26-000038 |
| 2026-05-08 | 09:10 ET | [8-K](/filings/0001315257-26-000036.md) | 2.02 Results of operations; 2.05 Exit or disposal costs; 5.02 Departure or appointment of officers or directors; 5.07 Shareholder vote results; 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001315257-26-000036 |
| 2026-05-07 | 16:18 ET | [8-K/A](/filings/0001315257-26-000030.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001315257-26-000030 |
| 2026-03-27 | 16:30 ET | [DEF 14A](/filings/0001315257-26-000026.md) | Proxy statement, period 2026-05-07 | 0001315257-26-000026 |
| 2026-03-18 | 16:45 ET | [8-K/A](/filings/0001315257-26-000017.md) | 5.02 Departure or appointment of officers or directors; 9.01 Financial statements and exhibits | 0001315257-26-000017 |

## Latest annual report

[Form 10-K for the fiscal year ended Dec 31, 2025](/filings/0001315257-26-000012.md), filed Feb 26, 2026.

## Forecast league

Q3 FY2026, the quarter ended 2026-09-30, is open for forecasts until the first results filing for it is accepted by EDGAR. Results are due by \[object Promise\]. [Forecast this quarter](/leagues/2026q3/targets/b3918db8-2637-4505-b5a9-1c25c5261ff2)

## About the filer

- CIK: 1315257
- Tickers: KOP
- Exchange: NYSE
- SIC code: 2400 Lumber & Wood Products (No Furniture)
- State of incorporation: PA
- Filer category: Large accelerated filer

Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 30, 2026, 12:04 ET. No prices; not investment advice.