Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
May 22, 2026	40.05	40.58	39.54	40.36	40.36	1.84%	119,925
May 21, 2026	38.56	39.67	38.50	39.63	39.63	1.10%	150,836
May 20, 2026	38.22	39.49	38.14	39.20	39.20	2.32%	160,698
May 19, 2026	39.86	39.96	38.13	38.31	38.31	-5.15%	223,623
May 18, 2026	40.73	41.96	40.39	40.39	40.39	-0.71%	204,426
May 15, 2026	42.23	42.23	40.33	40.68	40.68	-4.08%	233,653
May 14, 2026	43.23	43.88	41.94	42.41	42.41	-0.66%	367,472
May 13, 2026	43.77	44.67	42.30	42.69	42.69	-1.97%	294,096
May 12, 2026	42.99	44.10	42.42	43.55	43.55	1.09%	328,906
May 11, 2026	44.00	44.00	41.91	43.08	43.08	-2.07%	253,107
May 8, 2026	44.38	46.40	42.45	43.99	43.99	6.88%	334,016
May 7, 2026	41.49	42.41	41.09	41.16	41.16	-1.08%	176,878
May 6, 2026	41.80	42.04	40.18	41.61	41.61	0.63%	102,791
May 5, 2026	40.04	41.89	39.50	41.35	41.35	3.79%	121,112
May 4, 2026	41.70	41.74	39.50	39.84	39.84	-4.94%	148,469
May 1, 2026	41.09	41.93	41.00	41.91	41.91	2.65%	145,904
Apr 30, 2026	39.73	41.06	39.73	40.83	40.83	2.59%	109,595
Apr 29, 2026	41.61	41.61	39.75	39.80	39.80	-4.00%	166,536
Apr 28, 2026	41.50	42.17	40.91	41.46	41.46	0.27%	193,660
Apr 27, 2026	40.47	41.42	40.31	41.35	41.35	2.66%	153,692
Apr 24, 2026	39.00	40.49	38.85	40.28	40.28	4.22%	168,990
Apr 23, 2026	38.12	38.80	37.66	38.65	38.65	1.68%	129,033
Apr 22, 2026	38.06	38.06	37.42	38.01	38.01	1.31%	83,166
Apr 21, 2026	37.58	38.19	36.74	37.52	37.52	0.21%	150,685
Apr 20, 2026	37.58	37.96	37.35	37.44	37.44	-0.66%	71,675
Apr 17, 2026	36.92	38.13	36.56	37.69	37.69	1.92%	161,846
Apr 16, 2026	37.35	37.85	36.77	36.98	36.98	-1.49%	125,415
Apr 15, 2026	38.27	38.27	37.43	37.54	37.54	-2.34%	102,118
Apr 14, 2026	38.28	38.89	37.90	38.44	38.44	0.05%	122,342
Apr 13, 2026	37.46	38.46	37.14	38.42	38.42	2.62%	118,009
Apr 10, 2026	37.07	37.50	37.07	37.44	37.44	1.08%	87,577
Apr 9, 2026	37.21	37.61	36.70	37.04	37.04	-0.86%	147,546
Apr 8, 2026	37.20	37.50	36.93	37.36	37.36	1.88%	186,732
Apr 7, 2026	35.75	36.73	35.62	36.67	36.67	2.46%	217,679
Apr 6, 2026	37.18	37.19	35.68	35.79	35.79	-4.02%	212,520
Apr 2, 2026	36.94	37.84	36.31	37.29	37.29	-0.96%	237,320
Apr 1, 2026	38.59	38.93	37.54	37.65	37.65	-2.66%	200,581
Mar 31, 2026	38.61	39.09	37.97	38.68	38.68	1.15%	171,492
Mar 30, 2026	38.47	38.54	38.00	38.24	38.24	0.84%	205,026
Mar 27, 2026	38.32	38.67	37.54	37.92	37.92	-2.19%	136,562
Mar 26, 2026	37.65	38.84	37.65	38.77	38.77	2.38%	272,527
Mar 25, 2026	37.47	37.88	36.83	37.87	37.87	1.77%	175,188
Mar 24, 2026	35.88	37.30	35.88	37.21	37.21	3.07%	155,842
Mar 23, 2026	35.97	36.73	35.73	36.10	36.10	2.85%	235,365
Mar 20, 2026	37.87	38.14	35.01	35.10	35.10	-6.28%	1,281,177
Mar 19, 2026	37.43	37.75	36.81	37.45	37.45	0.27%	291,922
Mar 18, 2026	37.57	38.05	37.31	37.35	37.35	-0.98%	310,265
Mar 17, 2026	38.68	39.50	37.65	37.72	37.72	-1.75%	225,181
Mar 16, 2026	37.92	39.07	37.92	38.39	38.39	1.64%	258,792
Mar 13, 2026	37.50	37.81	37.22	37.77	37.77	1.10%	272,566