Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Oct 22, 2026	40.98	41.51	40.48	40.75	40.75	-1.43%	173,322
Oct 21, 2026	41.96	41.96	40.93	41.34	41.34	-0.86%	333,472
Oct 20, 2026	43.08	43.56	41.62	41.70	41.70	-2.82%	101,562
Oct 19, 2026	43.43	43.78	42.82	42.91	42.91	-0.95%	100,289
Oct 16, 2026	43.31	44.20	43.06	43.32	43.32	-0.28%	107,918
Oct 15, 2026	43.92	44.39	43.14	43.44	43.44	-0.53%	110,585
Oct 14, 2026	43.92	44.23	43.12	43.67	43.67	-1.67%	116,612
Oct 13, 2026	43.09	44.43	42.69	44.41	44.41	3.04%	144,417
Oct 12, 2026	42.92	43.60	42.92	43.10	43.10	-0.71%	115,126
Oct 9, 2026	44.22	44.22	42.88	43.41	43.41	-1.88%	134,136
Oct 8, 2026	43.71	45.06	43.71	44.24	44.24	0.82%	164,781
Oct 7, 2026	45.21	45.54	43.75	43.88	43.88	-4.67%	140,089
Oct 6, 2026	47.35	47.45	45.97	46.03	46.03	-2.15%	140,491
Oct 5, 2026	45.88	47.79	45.51	47.04	47.04	2.17%	217,471
Oct 2, 2026	45.81	46.39	45.31	46.04	46.04	1.88%	158,974
Oct 1, 2026	45.20	45.46	44.33	45.19	45.19	-0.88%	196,201
Sep 30, 2026	46.34	46.34	45.46	45.59	45.59	-1.06%	149,788
Sep 29, 2026	46.26	46.44	45.52	46.08	46.08	-0.19%	103,874
Sep 28, 2026	46.06	46.98	45.95	46.17	46.17	-0.22%	102,582
Sep 25, 2026	46.00	46.51	45.51	46.27	46.27	0.67%	98,772
Sep 24, 2026	46.34	46.45	45.55	45.96	45.96	-0.65%	106,977
Sep 23, 2026	45.98	46.43	45.09	46.26	46.26	0.35%	125,131
Sep 22, 2026	45.90	46.90	45.82	46.10	46.10	1.07%	170,700
Sep 21, 2026	45.72	46.31	45.19	45.61	45.61	0.62%	138,996
Sep 18, 2026	45.98	45.98	44.83	45.33	45.33	-1.84%	458,207
Sep 17, 2026	47.42	47.42	45.83	46.18	46.18	-1.16%	170,167
Sep 16, 2026	45.99	47.64	45.69	46.72	46.72	2.03%	312,860
Sep 15, 2026	46.12	46.40	45.43	45.79	45.79	-0.46%	150,372
Sep 14, 2026	45.92	46.20	45.27	46.00	46.00	-0.76%	110,260
Sep 11, 2026	46.62	47.00	46.19	46.35	46.35	-	109,958
Sep 10, 2026	45.96	46.94	45.71	46.35	46.35	0.63%	136,476
Sep 9, 2026	47.20	47.29	45.74	46.06	46.06	-2.25%	138,065
Sep 8, 2026	47.94	47.94	46.73	47.12	47.12	-1.38%	174,060
Sep 4, 2026	46.57	47.83	46.22	47.78	47.78	1.96%	169,947
Sep 3, 2026	47.25	47.43	46.16	46.86	46.86	0.30%	169,431
Sep 2, 2026	45.84	47.94	45.42	46.72	46.72	1.72%	203,537
Sep 1, 2026	45.28	46.08	44.49	45.93	45.93	0.13%	177,118
Aug 31, 2026	47.10	47.61	45.76	45.87	45.87	-1.48%	160,800
Aug 28, 2026	46.74	47.00	46.00	46.56	46.56	0.71%	117,708
Aug 27, 2026	46.05	46.63	45.35	46.32	46.23	-0.04%	112,893
Aug 26, 2026	46.56	47.09	45.92	46.34	46.25	0.46%	149,229
Aug 25, 2026	45.87	46.62	44.81	46.13	46.04	0.65%	108,674
Aug 24, 2026	45.43	46.00	44.89	45.83	45.74	1.42%	145,674
Aug 21, 2026	45.88	46.74	44.16	45.19	45.10	-1.50%	313,679
Aug 20, 2026	44.47	46.27	44.47	45.88	45.79	2.18%	194,313
Aug 19, 2026	45.72	47.02	44.76	44.90	44.81	-1.19%	157,278
Aug 18, 2026	47.29	47.82	45.15	45.44	45.35	-4.24%	162,790
Aug 17, 2026	47.05	47.57	46.13	47.45	47.36	0.66%	167,453
Aug 14, 2026	46.14	47.41	45.90	47.14	47.05	1.99%	220,388
Aug 13, 2026	45.36	46.72	44.91	46.22	46.13	1.94%	259,227