Koppers Holdings Inc. (KOP)
Showing Closing Date Range from May 15 to Nov 11, 2026 compared to Nov 15, 2025 to May 14, 2026.
Compare Last 6 Months with Previous Period
Current Period Close
$31.26
May 15, 2026 - Nov 11, 2026
Previous Period Close
$42.41
Nov 15, 2025 - May 14, 2026
Net Comparison Delta
$-11.15 (-26.29%)
Relative performance vs prior benchmark
Historical Quotes & Breakdown(125 dates)
| Current Date | Current Close | Previous Date | Previous Close | Delta (%) |
|---|---|---|---|---|
| Nov 11, 2026 | $31.26 | - | - | - |
| Nov 10, 2026 | $29.61 | - | - | - |
| Nov 09, 2026 | $29.33 | May 14, 2026 | $42.41 | -30.84% |
| Nov 06, 2026 | $29.97 | May 13, 2026 | $42.69 | -29.80% |
| Nov 05, 2026 | $39.64 | May 12, 2026 | $43.55 | -8.98% |
| Nov 04, 2026 | $42.89 | May 11, 2026 | $43.08 | -0.44% |
| Nov 03, 2026 | $41.80 | May 08, 2026 | $43.99 | -4.98% |
| Nov 02, 2026 | $41.83 | May 07, 2026 | $41.16 | +1.63% |
| Oct 30, 2026 | $41.50 | May 06, 2026 | $41.61 | -0.26% |
| Oct 29, 2026 | $41.86 | May 05, 2026 | $41.35 | +1.23% |
| Oct 28, 2026 | $42.08 | May 04, 2026 | $39.84 | +5.62% |
| Oct 27, 2026 | $41.44 | May 01, 2026 | $41.91 | -1.12% |
| Oct 26, 2026 | $39.83 | Apr 30, 2026 | $40.83 | -2.45% |
| Oct 23, 2026 | $40.18 | Apr 29, 2026 | $39.80 | +0.95% |
| Oct 22, 2026 | $40.75 | Apr 28, 2026 | $41.46 | -1.71% |
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