Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
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
Aug 12, 2026	46.38	46.74	44.10	45.34	45.25	-1.46%	344,563
Aug 11, 2026	50.00	50.20	45.77	46.01	45.92	-8.96%	301,024
Aug 10, 2026	51.01	51.49	49.62	50.54	50.44	-1.37%	200,381
Aug 7, 2026	51.15	51.31	48.80	51.24	51.14	-2.08%	478,656
Aug 6, 2026	48.63	53.00	47.81	52.33	52.23	2.55%	251,531
Aug 5, 2026	51.68	52.05	50.96	51.03	50.93	-1.85%	156,043
Aug 4, 2026	50.47	52.15	49.83	51.99	51.89	2.48%	175,925
Aug 3, 2026	49.46	51.06	48.98	50.73	50.63	3.49%	144,833
Jul 31, 2026	48.41	49.60	47.81	49.02	48.92	0.08%	145,860
Jul 30, 2026	49.57	50.29	48.57	48.98	48.88	-0.47%	135,162
Jul 29, 2026	50.54	51.45	48.67	49.21	49.11	-1.97%	135,191
Jul 28, 2026	50.00	51.13	48.89	50.20	50.10	1.19%	111,990
Jul 27, 2026	50.07	50.76	48.50	49.61	49.51	-1.21%	117,291
Jul 24, 2026	49.60	50.66	48.83	50.22	50.12	0.52%	148,194