Koppers Inc.
KOP | NYSE
$45.61
+$0.28 (+0.62%)
At close: Sep 21, 2026, 4:00 PM ET
$45.61
$0 (0.00%)
After-hours:
Sep 21, 2026, 5:26 PM ET
Market Cap History History
Annual Market Cap Change Annual Change
| Date | Market Cap | Change | % Change |
|---|---|---|---|
| Sep 20, 2026 | $872.43M | $342.75M | +64.71% |
| Dec 25, 2025 | $529.68M | -$122.19M | -18.74% |
| Dec 26, 2024 | $651.86M | -$414.95M | -38.90% |
| Dec 28, 2023 | $1.07B | $477.51M | +81.03% |
| Dec 29, 2022 | $589.3M | -$74.05M | -11.16% |
| Dec 30, 2021 | $663.34M | $6.92M | +1.05% |
| Dec 30, 2020 | $656.42M | -$134.95M | -17.05% |
| Dec 26, 2019 | $791.37M | $425.44M | +116.26% |
| Dec 27, 2018 | $365.93M | -$690.04M | -65.35% |
| Dec 28, 2017 | $1.06B | $223.49M | +26.85% |
| Dec 29, 2016 | $832.48M | $457.37M | +121.93% |
| Dec 30, 2015 | $375.11M | -$156.94M | -29.50% |
| Dec 25, 2014 | $532.05M | -$420.66M | -44.15% |
| Dec 26, 2013 | $952.72M | $176.28M | +22.70% |
| Dec 27, 2012 | $776.44M | $68.52M | +9.68% |
| Dec 29, 2011 | $707.92M | -$28.18M | -3.83% |
| Dec 30, 2010 | $736.1M | $113.45M | +18.22% |
| Dec 30, 2009 | $622.65M | $249.12M | +66.69% |
| Dec 25, 2008 | $373.53M | -$521.99M | -58.29% |
| Dec 27, 2007 | $895.52M | $356.6M | +66.17% |
| Dec 28, 2006 | $538.92M | n/a | n/a |
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