Employee Count History - Koppers Holdings Inc.
Historical employee count data from SEC filings.
Workforce Trend Analysis
Employee Count History
SEC Filing History
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| Filing Date | Period | Employee Count | Form Type | YoY Change |
|---|---|---|---|---|
| Feb 26, 2026 | Dec 31, 2025 | 425 | 10-K | -79.59% |
| Feb 27, 2025 | Dec 31, 2024 | 2,082 | 10-K | -1.23% |
| Feb 28, 2024 | Dec 31, 2023 | 2,108 | 10-K | -0.52% |
| Feb 27, 2023 | Dec 31, 2022 | 2,119 | 10-K | +1.48% |
| Feb 23, 2022 | Dec 31, 2021 | 2,088 | 10-K | +1.31% |
| Feb 24, 2021 | Dec 31, 2020 | 2,061 | 10-K | -2.78% |
Feb 27, 2020 | Dec 31, 2019 | — | — | — |
Mar 1, 2019 | Dec 31, 2018 | — | — | — |
Feb 27, 2018 | Dec 31, 2017 | — | — | — |
Feb 24, 2017 | Dec 31, 2016 | — | — | — |
Feb 29, 2016 | Dec 31, 2015 | — | — | — |
Mar 2, 2015 | Dec 31, 2014 | — | — | — |
Mar 3, 2014 | Dec 31, 2013 | — | — | — |
Feb 25, 2013 | Dec 31, 2012 | — | — | — |
Feb 27, 2012 | Dec 31, 2011 | — | — | — |
Feb 22, 2011 | Dec 31, 2010 | — | — | — |
Feb 19, 2010 | Dec 31, 2009 | — | — | — |
Feb 20, 2009 | Dec 31, 2008 | — | — | — |
Feb 22, 2008 | Dec 31, 2007 | — | — | — |
Feb 22, 2007 | Dec 31, 2006 | — | — | — |
Mar 21, 2006 | Dec 31, 2005 | — | — | — |