Koppers Holdings Inc. (KOP)
Showing Closing Date Range from Jul 25 to Oct 23, 2026 compared to Apr 25 to Jul 24, 2026.
Compare Last 3 Months with Previous Period
Current Period Close
$40.18
Jul 25, 2026 - Oct 23, 2026
Previous Period Close
$50.22
Apr 25, 2026 - Jul 24, 2026
Net Comparison Delta
$-10.04 (-19.99%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(64 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Oct 23, 2026 | $40.18 | - | - | - |
| Oct 22, 2026 | $40.75 | - | - | - |
| Oct 21, 2026 | $41.34 | Jul 24, 2026 | $50.22 | -17.68% |
| Oct 20, 2026 | $41.70 | Jul 23, 2026 | $49.96 | -16.53% |
| Oct 19, 2026 | $42.91 | Jul 22, 2026 | $51.17 | -16.14% |
| Oct 16, 2026 | $43.32 | Jul 21, 2026 | $51.47 | -15.83% |
| Oct 15, 2026 | $43.44 | Jul 20, 2026 | $49.20 | -11.71% |
| Oct 14, 2026 | $43.67 | Jul 17, 2026 | $49.14 | -11.13% |
| Oct 13, 2026 | $44.41 | Jul 16, 2026 | $49.05 | -9.46% |
| Oct 12, 2026 | $43.10 | Jul 15, 2026 | $48.47 | -11.08% |
| Oct 09, 2026 | $43.41 | Jul 14, 2026 | $48.53 | -10.55% |
| Oct 08, 2026 | $44.24 | Jul 13, 2026 | $47.77 | -7.39% |
| Oct 07, 2026 | $43.88 | Jul 10, 2026 | $47.56 | -7.74% |
| Oct 06, 2026 | $46.03 | Jul 09, 2026 | $46.59 | -1.20% |
| Oct 05, 2026 | $47.04 | Jul 08, 2026 | $47.40 | -0.76% |
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