Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
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
Feb 20, 2026	34.81	35.16	34.16	35.11	35.03	1.44%	129,446
Feb 19, 2026	35.07	35.12	34.14	34.61	34.53	-1.28%	124,629
Feb 18, 2026	35.07	35.70	34.63	35.06	34.98	-0.03%	199,929
Feb 17, 2026	34.12	35.44	33.14	35.07	34.99	2.24%	178,621
Feb 13, 2026	34.29	34.81	34.00	34.30	34.22	0.23%	209,824
Feb 12, 2026	34.53	34.91	33.52	34.22	34.14	0.03%	243,463
Feb 11, 2026	33.35	34.21	32.92	34.21	34.13	3.04%	154,661
Feb 10, 2026	32.63	33.62	32.63	33.20	33.12	2.15%	154,975
Feb 9, 2026	32.25	32.77	31.66	32.50	32.42	0.62%	112,335
Feb 6, 2026	31.83	32.51	31.57	32.30	32.22	2.54%	168,548
Feb 5, 2026	31.24	31.67	30.83	31.50	31.43	0.90%	174,848
Feb 4, 2026	30.57	31.88	30.46	31.22	31.15	3.00%	200,277
Feb 3, 2026	29.58	30.74	29.33	30.31	30.24	2.09%	145,660
Feb 2, 2026	29.47	30.00	29.15	29.69	29.62	0.78%	155,739