Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Aug 21, 2026	45.88	46.74	44.16	45.19	45.19	-1.50%	313,678
Aug 20, 2026	44.47	46.27	44.47	45.88	45.88	2.18%	194,312
Aug 19, 2026	45.72	47.02	44.76	44.90	44.90	-1.19%	157,224
Aug 18, 2026	47.29	47.82	45.15	45.44	45.44	-4.24%	162,762
Aug 17, 2026	47.05	47.57	46.13	47.45	47.45	0.66%	167,429
Aug 14, 2026	46.14	47.41	45.90	47.14	47.14	1.99%	220,249
Aug 13, 2026	45.36	46.72	44.91	46.22	46.22	1.94%	195,187
Aug 12, 2026	46.38	46.74	44.10	45.34	45.34	-1.46%	338,699
Aug 11, 2026	50.00	50.20	45.77	46.01	46.01	-8.96%	233,611
Aug 10, 2026	51.01	51.49	49.62	50.54	50.54	-1.37%	200,375
Aug 7, 2026	51.15	51.31	48.80	51.24	51.24	-2.08%	478,655
Aug 6, 2026	48.63	53.00	47.81	52.33	52.33	2.55%	251,509
Aug 5, 2026	51.68	52.05	50.96	51.03	51.03	-1.85%	156,032
Aug 4, 2026	50.47	52.15	49.83	51.99	51.99	2.48%	175,924
Aug 3, 2026	49.46	51.06	48.98	50.73	50.73	3.49%	144,831
Jul 31, 2026	48.41	49.60	47.81	49.02	49.02	0.08%	145,859
Jul 30, 2026	49.57	50.29	48.57	48.98	48.98	-0.47%	135,087
Jul 29, 2026	50.54	51.45	48.67	49.21	49.21	-1.97%	135,183
Jul 28, 2026	50.00	51.13	48.89	50.20	50.20	1.19%	111,420
Jul 27, 2026	50.07	50.76	48.50	49.61	49.61	-1.21%	117,291
Jul 24, 2026	49.60	50.66	48.83	50.22	50.22	0.52%	148,193
Jul 23, 2026	51.02	51.28	49.86	49.96	49.96	-2.36%	180,369
Jul 22, 2026	51.47	52.25	50.37	51.17	51.17	-0.58%	100,289
Jul 21, 2026	49.73	51.54	48.67	51.47	51.47	4.61%	163,321
Jul 20, 2026	49.17	50.07	47.77	49.20	49.20	0.12%	205,387
Jul 17, 2026	48.59	49.46	48.32	49.14	49.14	0.18%	216,857
Jul 16, 2026	48.06	50.00	48.06	49.05	49.05	1.20%	222,306
Jul 15, 2026	48.74	49.30	48.00	48.47	48.47	-0.12%	145,064
Jul 14, 2026	48.27	49.00	48.05	48.53	48.53	1.59%	78,489
Jul 13, 2026	47.65	48.36	47.23	47.77	47.77	0.44%	116,303
Jul 10, 2026	46.93	48.12	46.49	47.56	47.56	2.08%	115,592
Jul 9, 2026	47.41	48.00	46.48	46.59	46.59	-1.71%	159,564
Jul 8, 2026	46.61	47.52	45.37	47.40	47.40	1.37%	144,516
Jul 7, 2026	46.84	47.32	45.13	46.76	46.76	-0.72%	202,924
Jul 6, 2026	45.97	47.68	45.75	47.10	47.10	1.93%	149,787
Jul 2, 2026	44.97	48.63	44.96	46.21	46.21	3.70%	255,728
Jul 1, 2026	44.78	45.56	44.48	44.56	44.56	-0.76%	126,250
Jun 30, 2026	45.09	45.54	44.65	44.90	44.90	-1.01%	123,147
Jun 29, 2026	44.88	45.45	43.95	45.36	45.36	0.53%	157,728
Jun 26, 2026	44.33	45.13	44.01	45.12	45.12	0.94%	311,222
Jun 25, 2026	44.45	44.75	43.68	44.70	44.70	1.87%	154,787
Jun 24, 2026	42.94	44.36	42.77	43.88	43.88	2.28%	157,408
Jun 23, 2026	43.80	43.90	42.78	42.90	42.90	-3.42%	136,008
Jun 22, 2026	43.49	44.46	42.65	44.42	44.42	1.58%	291,772
Jun 18, 2026	43.94	44.74	43.42	43.73	43.73	0.18%	381,302
Jun 17, 2026	44.53	45.44	43.64	43.65	43.65	-1.91%	153,445
Jun 16, 2026	44.65	45.33	44.26	44.50	44.50	0.23%	183,863
Jun 15, 2026	44.07	44.55	43.63	44.40	44.40	2.28%	183,942
Jun 12, 2026	41.92	43.66	41.87	43.41	43.41	4.55%	160,820
Jun 11, 2026	42.17	42.17	40.81	41.52	41.52	-0.38%	110,436