Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
May 4, 2026	41.70	41.74	39.50	39.84	39.84	-4.94%	148,337
May 1, 2026	41.09	41.93	41.00	41.91	41.91	2.65%	145,878
Apr 30, 2026	39.73	41.06	39.73	40.83	40.83	2.59%	109,562
Apr 29, 2026	41.61	41.61	39.75	39.80	39.80	-4.00%	166,361
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%	153,497
Apr 24, 2026	39.00	40.49	38.85	40.28	40.28	4.22%	168,548
Apr 23, 2026	38.12	38.80	37.66	38.65	38.65	1.68%	128,923
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%	150,159
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%	125,408
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%	122,335
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%	147,536
Apr 8, 2026	37.20	37.50	36.93	37.36	37.36	1.88%	186,727
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%	212,492
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%	205,022
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%	272,470
Mar 25, 2026	37.47	37.88	36.83	37.87	37.87	1.77%	175,099
Mar 24, 2026	35.88	37.30	35.88	37.21	37.21	3.07%	155,836
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%	1,274,507
Mar 19, 2026	37.43	37.75	36.81	37.45	37.45	0.27%	290,284
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%	225,180
Mar 16, 2026	37.92	39.07	37.92	38.39	38.39	1.64%	258,789
Mar 13, 2026	37.50	37.81	37.22	37.77	37.77	1.10%	272,566
Mar 12, 2026	37.17	38.39	37.17	37.36	37.36	0.21%	251,918
Mar 11, 2026	37.05	38.17	36.89	37.28	37.28	0.24%	291,886
Mar 10, 2026	38.01	38.11	37.07	37.19	37.19	-3.48%	327,545
Mar 9, 2026	37.14	38.77	36.41	38.53	38.53	2.61%	418,786
Mar 6, 2026	37.60	38.08	36.93	37.55	37.55	-1.24%	290,709
Mar 5, 2026	37.97	39.27	37.20	38.02	37.93	-1.37%	247,401
Mar 4, 2026	36.89	38.74	35.95	38.55	38.46	4.96%	342,220
Mar 3, 2026	35.12	36.76	34.59	36.73	36.64	0.85%	257,267
Mar 2, 2026	37.51	37.51	35.30	36.42	36.33	-3.65%	327,819
Feb 27, 2026	36.74	38.21	36.10	37.80	37.71	1.50%	342,723
Feb 26, 2026	35.50	37.52	34.92	37.24	37.15	7.88%	186,674
Feb 25, 2026	34.51	34.59	33.44	34.52	34.44	0.29%	104,716
Feb 24, 2026	33.89	34.68	33.76	34.42	34.34	2.08%	120,553
Feb 23, 2026	34.98	34.98	33.51	33.72	33.64	-3.96%	161,014