Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Sep 29, 2025	28.60	28.63	27.75	27.75	27.75	-2.32%	138,789
Sep 26, 2025	28.15	28.68	28.15	28.41	28.41	0.92%	121,925
Sep 25, 2025	28.75	28.75	28.10	28.15	28.15	-2.32%	127,678
Sep 24, 2025	28.81	28.95	28.64	28.82	28.82	0.24%	114,550
Sep 23, 2025	28.87	29.49	28.73	28.75	28.75	-0.48%	224,766
Sep 22, 2025	28.83	29.02	28.57	28.89	28.89	-0.38%	227,062
Sep 19, 2025	29.32	29.36	28.56	29.00	29.00	-1.19%	591,356
Sep 18, 2025	29.22	29.55	28.86	29.35	29.35	1.28%	222,003
Sep 17, 2025	28.73	29.90	28.53	28.98	28.98	1.22%	290,260
Sep 16, 2025	28.67	29.16	28.43	28.63	28.63	-	132,842
Sep 15, 2025	28.88	28.96	28.29	28.63	28.63	-0.42%	139,985
Sep 12, 2025	28.65	28.98	28.14	28.75	28.75	-0.52%	177,708
Sep 11, 2025	27.49	28.98	27.49	28.90	28.90	4.98%	199,120
Sep 10, 2025	28.65	28.82	27.38	27.53	27.53	-4.04%	137,870
Sep 9, 2025	28.39	28.94	28.19	28.69	28.69	0.07%	198,366
Sep 8, 2025	28.91	28.94	28.35	28.67	28.67	-0.69%	170,843
Sep 5, 2025	28.59	29.99	28.50	28.87	28.87	0.87%	159,568
Sep 4, 2025	28.22	28.69	27.97	28.62	28.62	1.92%	171,977
Sep 3, 2025	28.14	28.98	27.24	28.08	28.08	-0.85%	173,089
Sep 2, 2025	28.65	28.89	28.24	28.32	28.32	-2.28%	174,828
Aug 29, 2025	29.04	29.16	28.65	28.98	28.98	-0.10%	135,657
Aug 28, 2025	29.40	29.47	28.94	29.01	28.93	-0.75%	172,918
Aug 27, 2025	29.23	29.74	28.75	29.23	29.15	-0.54%	129,990
Aug 26, 2025	29.65	29.79	29.23	29.39	29.31	-1.04%	138,870
Aug 25, 2025	30.22	30.22	29.23	29.70	29.62	-1.53%	127,390
Aug 22, 2025	29.27	30.47	28.94	30.16	30.08	4.76%	148,847
Aug 21, 2025	28.85	29.30	28.64	28.79	28.71	-1.84%	266,681
Aug 20, 2025	29.78	29.90	29.25	29.33	29.25	-1.74%	138,447
Aug 19, 2025	29.78	30.30	29.53	29.85	29.77	0.78%	143,088
Aug 18, 2025	29.54	29.90	29.46	29.62	29.54	0.03%	160,388
Aug 15, 2025	30.81	30.89	29.52	29.61	29.53	-3.36%	223,009
Aug 14, 2025	30.44	31.01	30.43	30.64	30.56	-1.35%	168,414
Aug 13, 2025	30.00	31.18	30.00	31.06	30.97	4.76%	169,137
Aug 12, 2025	28.93	30.40	28.50	29.65	29.57	4.59%	265,579
Aug 11, 2025	28.74	29.04	26.82	28.35	28.27	-1.70%	308,064
Aug 8, 2025	28.76	29.57	26.79	28.84	28.76	-13.32%	405,339
Aug 7, 2025	32.95	33.46	32.72	33.27	33.18	2.56%	96,893
Aug 6, 2025	32.49	32.60	32.24	32.44	32.35	-0.55%	79,040
Aug 5, 2025	31.91	32.75	31.91	32.62	32.53	2.42%	102,931
Aug 4, 2025	31.99	32.36	31.73	31.85	31.76	-0.13%	87,478
Aug 1, 2025	32.49	32.49	31.41	31.89	31.80	-2.95%	116,697
Jul 31, 2025	32.67	33.12	32.51	32.86	32.77	-0.73%	121,450
Jul 30, 2025	33.76	33.76	32.83	33.10	33.01	-2.13%	113,950
Jul 29, 2025	34.18	34.18	33.69	33.82	33.73	-0.68%	99,793
Jul 28, 2025	34.50	34.70	33.84	34.05	33.96	-1.56%	94,690
Jul 25, 2025	33.43	34.65	33.40	34.59	34.50	3.28%	100,772
Jul 24, 2025	33.84	34.08	33.29	33.49	33.40	-2.33%	116,093
Jul 23, 2025	33.60	34.31	33.32	34.29	34.20	3.91%	110,269
Jul 22, 2025	32.41	33.19	32.33	33.00	32.91	2.42%	180,766
Jul 21, 2025	32.63	32.96	32.14	32.22	32.13	-0.37%	94,166