Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
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
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
Jan 30, 2026	29.22	29.84	28.99	29.46	29.39	-0.54%	155,989
Jan 29, 2026	29.44	29.68	29.00	29.62	29.55	1.30%	147,501
Jan 28, 2026	29.12	29.28	28.79	29.24	29.17	0.41%	91,703
Jan 27, 2026	29.06	29.17	28.77	29.12	29.05	-0.03%	83,820
Jan 26, 2026	29.03	29.22	28.65	29.13	29.06	0.55%	94,390
Jan 23, 2026	29.34	29.46	28.88	28.97	28.90	-1.63%	97,124
Jan 22, 2026	29.85	30.22	29.37	29.45	29.38	-0.24%	123,812
Jan 21, 2026	28.22	29.60	28.22	29.52	29.45	4.83%	126,543
Jan 20, 2026	28.50	28.56	27.96	28.16	28.09	-3.16%	112,377
Jan 16, 2026	28.92	29.25	28.75	29.08	29.01	-0.55%	170,390
Jan 15, 2026	29.39	29.66	29.02	29.24	29.17	-0.41%	100,453
Jan 14, 2026	28.90	29.72	28.67	29.36	29.29	2.16%	133,286
Jan 13, 2026	28.92	29.91	28.71	28.74	28.67	-0.66%	116,976
Jan 12, 2026	28.25	29.01	27.49	28.93	28.86	2.12%	115,563
Jan 9, 2026	27.04	28.47	26.81	28.33	28.26	2.57%	220,024
Jan 8, 2026	26.80	27.83	26.77	27.62	27.55	2.56%	85,747
Jan 7, 2026	27.65	27.77	26.79	26.93	26.87	-2.53%	123,935
Jan 6, 2026	26.75	27.72	26.55	27.63	27.56	2.60%	247,845
Jan 5, 2026	26.52	27.49	26.52	26.93	26.87	0.97%	102,511
Jan 2, 2026	27.04	27.29	26.65	26.67	26.61	-1.51%	122,918
Dec 31, 2025	27.39	27.48	27.00	27.08	27.02	-0.99%	116,443
Dec 30, 2025	27.20	27.60	27.01	27.35	27.29	0.22%	115,629
Dec 29, 2025	26.94	27.31	26.64	27.29	27.23	1.26%	139,875
Dec 26, 2025	27.15	27.24	26.76	26.95	26.89	-1.10%	119,255
Dec 24, 2025	26.89	27.29	26.88	27.25	27.19	1.49%	54,899
Dec 23, 2025	27.26	27.33	26.76	26.85	26.79	-1.54%	80,812
Dec 22, 2025	27.42	28.13	27.21	27.27	27.21	-0.80%	182,021
Dec 19, 2025	27.92	28.00	27.08	27.49	27.42	-2.28%	325,893
Dec 18, 2025	28.17	28.68	27.88	28.13	28.06	-0.60%	143,065
Dec 17, 2025	28.51	28.83	28.17	28.30	28.23	-1.12%	106,645
Dec 16, 2025	28.47	29.04	28.12	28.62	28.55	0.46%	220,602
Dec 15, 2025	29.06	29.47	28.42	28.49	28.42	-1.79%	120,286
Dec 12, 2025	29.25	29.80	28.92	29.01	28.94	-0.85%	151,539
Dec 11, 2025	29.04	29.34	28.72	29.26	29.19	1.67%	109,517
Dec 10, 2025	27.69	29.09	27.69	28.78	28.71	3.56%	192,756
Dec 9, 2025	28.25	28.41	27.47	27.79	27.72	-0.93%	165,243
Dec 8, 2025	28.08	28.61	27.87	28.05	27.98	0.14%	153,996
Dec 5, 2025	27.84	28.49	27.84	28.01	27.94	-0.14%	106,218
Dec 4, 2025	29.08	29.25	27.99	28.05	27.98	-3.94%	115,218
Dec 3, 2025	29.24	29.71	28.81	29.20	29.13	-0.07%	105,850