Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
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
Jun 10, 2026	41.70	42.31	41.49	41.68	41.68	-0.43%	167,193
Jun 9, 2026	41.90	42.60	40.80	41.86	41.86	1.55%	145,684
Jun 8, 2026	41.22	41.76	40.62	41.22	41.22	1.00%	178,072
Jun 5, 2026	42.04	42.38	40.62	40.81	40.81	-3.20%	167,214
Jun 4, 2026	43.36	43.57	41.72	42.16	42.16	-2.16%	272,194
Jun 3, 2026	42.09	43.52	41.88	43.09	43.09	1.44%	230,140
Jun 2, 2026	41.17	42.61	40.63	42.48	42.48	3.13%	124,485
Jun 1, 2026	40.58	41.29	40.20	41.19	41.19	0.96%	114,955
May 29, 2026	40.97	41.36	40.64	40.80	40.80	-0.97%	228,356
May 28, 2026	42.46	42.61	41.10	41.29	41.20	-3.37%	107,796
May 27, 2026	41.70	42.77	41.70	42.73	42.64	2.86%	142,015
May 26, 2026	41.57	42.00	40.85	41.54	41.45	2.92%	174,078
May 22, 2026	40.05	40.58	39.54	40.36	40.27	1.84%	120,134
May 21, 2026	38.56	39.67	38.50	39.63	39.54	1.10%	150,846
May 20, 2026	38.22	39.49	38.14	39.20	39.11	2.32%	160,698
May 19, 2026	39.86	39.96	38.13	38.31	38.23	-5.15%	223,631
May 18, 2026	40.73	41.96	40.39	40.39	40.30	-0.71%	204,426
May 15, 2026	42.23	42.23	40.33	40.68	40.59	-4.08%	233,653
May 14, 2026	43.23	43.88	41.94	42.41	42.32	-0.66%	367,472
May 13, 2026	43.77	44.67	42.30	42.69	42.60	-1.97%	294,096
May 12, 2026	42.99	44.10	42.42	43.55	43.46	1.09%	328,906
May 11, 2026	44.00	44.00	41.91	43.08	42.99	-2.07%	253,107
May 8, 2026	44.38	46.40	42.45	43.99	43.89	6.88%	334,016
May 7, 2026	41.49	42.41	41.09	41.16	41.07	-1.08%	176,878
May 6, 2026	41.80	42.04	40.18	41.61	41.52	0.63%	102,791
May 5, 2026	40.04	41.89	39.50	41.35	41.26	3.79%	121,112
May 4, 2026	41.70	41.74	39.50	39.84	39.75	-4.94%	148,469
May 1, 2026	41.09	41.93	41.00	41.91	41.82	2.65%	145,904
Apr 30, 2026	39.73	41.06	39.73	40.83	40.74	2.59%	109,595
Apr 29, 2026	41.61	41.61	39.75	39.80	39.71	-4.00%	166,536
Apr 28, 2026	41.50	42.17	40.91	41.46	41.37	0.27%	193,660
Apr 27, 2026	40.47	41.42	40.31	41.35	41.26	2.66%	153,692
Apr 24, 2026	39.00	40.49	38.85	40.28	40.19	4.22%	168,990
Apr 23, 2026	38.12	38.80	37.66	38.65	38.57	1.68%	129,033
Apr 22, 2026	38.06	38.06	37.42	38.01	37.93	1.31%	83,166
Apr 21, 2026	37.58	38.19	36.74	37.52	37.44	0.21%	150,685
Apr 20, 2026	37.58	37.96	37.35	37.44	37.36	-0.66%	71,675
Apr 17, 2026	36.92	38.13	36.56	37.69	37.61	1.92%	161,846
Apr 16, 2026	37.35	37.85	36.77	36.98	36.90	-1.49%	125,415
Apr 15, 2026	38.27	38.27	37.43	37.54	37.46	-2.34%	102,118
Apr 14, 2026	38.28	38.89	37.90	38.44	38.36	0.05%	122,342
Apr 13, 2026	37.46	38.46	37.14	38.42	38.34	2.62%	118,009
Apr 10, 2026	37.07	37.50	37.07	37.44	37.36	1.08%	87,577
Apr 9, 2026	37.21	37.61	36.70	37.04	36.96	-0.86%	147,546
Apr 8, 2026	37.20	37.50	36.93	37.36	37.28	1.88%	186,732