Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Jun 26, 2026	44.33	45.13	44.01	45.12	45.12	0.94%	311,222
Jun 25, 2026	44.45	44.75	43.68	44.70	44.70	1.87%	154,787
Jun 24, 2026	42.94	44.36	42.77	43.88	43.88	2.28%	157,408
Jun 23, 2026	43.80	43.90	42.78	42.90	42.90	-3.42%	136,008
Jun 22, 2026	43.49	44.46	42.65	44.42	44.42	1.58%	291,772
Jun 18, 2026	43.94	44.74	43.42	43.73	43.73	0.18%	381,302
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
Apr 7, 2026	35.75	36.73	35.62	36.67	36.59	2.46%	217,679
Apr 6, 2026	37.18	37.19	35.68	35.79	35.71	-4.02%	212,520
Apr 2, 2026	36.94	37.84	36.31	37.29	37.21	-0.96%	237,320
Apr 1, 2026	38.59	38.93	37.54	37.65	37.57	-2.66%	200,581
Mar 31, 2026	38.61	39.09	37.97	38.68	38.60	1.15%	171,492
Mar 30, 2026	38.47	38.54	38.00	38.24	38.16	0.84%	205,026
Mar 27, 2026	38.32	38.67	37.54	37.92	37.84	-2.19%	136,562
Mar 26, 2026	37.65	38.84	37.65	38.77	38.69	2.38%	272,527
Mar 25, 2026	37.47	37.88	36.83	37.87	37.79	1.77%	175,188
Mar 24, 2026	35.88	37.30	35.88	37.21	37.13	3.07%	155,842
Mar 23, 2026	35.97	36.73	35.73	36.10	36.02	2.85%	235,365
Mar 20, 2026	37.87	38.14	35.01	35.10	35.02	-6.28%	1,281,177
Mar 19, 2026	37.43	37.75	36.81	37.45	37.37	0.27%	291,922
Mar 18, 2026	37.57	38.05	37.31	37.35	37.27	-0.98%	310,265
Mar 17, 2026	38.68	39.50	37.65	37.72	37.64	-1.75%	225,181
Mar 16, 2026	37.92	39.07	37.92	38.39	38.31	1.64%	258,792
Mar 13, 2026	37.50	37.81	37.22	37.77	37.69	1.10%	272,566
Mar 12, 2026	37.17	38.39	37.17	37.36	37.28	0.21%	251,918
Mar 11, 2026	37.05	38.17	36.89	37.28	37.20	0.24%	292,244
Mar 10, 2026	38.01	38.11	37.07	37.19	37.11	-3.48%	327,545
Mar 9, 2026	37.14	38.77	36.41	38.53	38.45	2.61%	418,817
Mar 6, 2026	37.60	38.08	36.93	37.55	37.47	-1.00%	290,809
Mar 5, 2026	37.97	39.27	37.20	38.02	37.85	-1.37%	247,402
Mar 4, 2026	36.89	38.74	35.95	38.55	38.37	4.96%	342,220
Mar 3, 2026	35.12	36.76	34.59	36.73	36.56	0.85%	257,267
Mar 2, 2026	37.51	37.51	35.30	36.42	36.25	-3.65%	327,819
Feb 27, 2026	36.74	38.21	36.10	37.80	37.63	1.50%	342,723
Feb 26, 2026	35.50	37.52	34.92	37.24	37.07	7.88%	186,674
Feb 25, 2026	34.51	34.59	33.44	34.52	34.36	0.29%	104,716
Feb 24, 2026	33.89	34.68	33.76	34.42	34.26	2.08%	120,553
Feb 23, 2026	34.98	34.98	33.51	33.72	33.57	-3.96%	161,014
Feb 20, 2026	34.81	35.16	34.16	35.11	34.95	1.44%	129,446
Feb 19, 2026	35.07	35.12	34.14	34.61	34.45	-1.28%	124,629
Feb 18, 2026	35.07	35.70	34.63	35.06	34.90	-0.03%	199,929
Feb 17, 2026	34.12	35.44	33.14	35.07	34.91	2.24%	178,621
Feb 13, 2026	34.29	34.81	34.00	34.30	34.14	0.23%	209,824
Feb 12, 2026	34.53	34.91	33.52	34.22	34.06	0.03%	243,463
Feb 11, 2026	33.35	34.21	32.92	34.21	34.05	3.04%	154,661
Feb 10, 2026	32.63	33.62	32.63	33.20	33.05	2.15%	154,975
Feb 9, 2026	32.25	32.77	31.66	32.50	32.35	0.62%	112,335
Feb 6, 2026	31.83	32.51	31.57	32.30	32.15	2.54%	168,548
Feb 5, 2026	31.24	31.67	30.83	31.50	31.36	0.90%	174,848
Feb 4, 2026	30.57	31.88	30.46	31.22	31.08	3.00%	200,277
Feb 3, 2026	29.58	30.74	29.33	30.31	30.17	2.09%	145,660