Koppers Holdings Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Sep 2, 2025	28.65	28.89	28.24	28.32	28.32	-2.28%	174,823
Aug 29, 2025	29.04	29.16	28.65	28.98	28.98	-0.10%	135,657
Aug 28, 2025	29.40	29.47	28.94	29.01	28.93	-0.75%	172,918
Aug 27, 2025	29.23	29.74	28.75	29.23	29.15	-0.54%	129,990
Aug 26, 2025	29.65	29.79	29.23	29.39	29.31	-1.04%	138,870
Aug 25, 2025	30.22	30.22	29.23	29.70	29.62	-1.53%	127,390
Aug 22, 2025	29.27	30.47	28.94	30.16	30.08	4.76%	148,847
Aug 21, 2025	28.85	29.30	28.64	28.79	28.71	-1.84%	266,681
Aug 20, 2025	29.78	29.90	29.25	29.33	29.25	-1.74%	138,447
Aug 19, 2025	29.78	30.30	29.53	29.85	29.77	0.78%	143,088
Aug 18, 2025	29.54	29.90	29.46	29.62	29.54	0.03%	160,388
Aug 15, 2025	30.81	30.89	29.52	29.61	29.53	-3.36%	223,009
Aug 14, 2025	30.44	31.01	30.43	30.64	30.56	-1.35%	168,414
Aug 13, 2025	30.00	31.18	30.00	31.06	30.97	4.76%	169,137
Aug 12, 2025	28.93	30.40	28.50	29.65	29.57	4.59%	265,579
Aug 11, 2025	28.74	29.04	26.82	28.35	28.27	-1.70%	308,064
Aug 8, 2025	28.76	29.57	26.79	28.84	28.76	-13.32%	405,339
Aug 7, 2025	32.95	33.46	32.72	33.27	33.18	2.56%	96,893
Aug 6, 2025	32.49	32.60	32.24	32.44	32.35	-0.55%	79,040
Aug 5, 2025	31.91	32.75	31.91	32.62	32.53	2.42%	102,931
Aug 4, 2025	31.99	32.36	31.73	31.85	31.76	-0.13%	87,478
Aug 1, 2025	32.49	32.49	31.41	31.89	31.80	-2.95%	116,697
Jul 31, 2025	32.67	33.12	32.51	32.86	32.77	-0.73%	121,450
Jul 30, 2025	33.76	33.76	32.83	33.10	33.01	-2.13%	113,950
Jul 29, 2025	34.18	34.18	33.69	33.82	33.73	-0.68%	99,793
Jul 28, 2025	34.50	34.70	33.84	34.05	33.96	-1.56%	94,690
Jul 25, 2025	33.43	34.65	33.40	34.59	34.50	3.28%	100,772
Jul 24, 2025	33.84	34.08	33.29	33.49	33.40	-2.33%	116,093
Jul 23, 2025	33.60	34.31	33.32	34.29	34.20	3.91%	110,269
Jul 22, 2025	32.41	33.19	32.33	33.00	32.91	2.42%	180,766
Jul 21, 2025	32.63	32.96	32.14	32.22	32.13	-0.37%	94,166
Jul 18, 2025	32.62	32.62	31.92	32.34	32.25	0.25%	120,439
Jul 17, 2025	32.26	32.52	32.17	32.26	32.17	-0.55%	105,557
Jul 16, 2025	32.93	32.93	32.14	32.44	32.35	-1.04%	164,871
Jul 15, 2025	33.69	33.80	32.71	32.78	32.69	-2.82%	124,630
Jul 14, 2025	33.80	33.94	33.07	33.73	33.64	-0.88%	112,223
Jul 11, 2025	34.05	34.76	33.76	34.03	33.94	-1.62%	87,925
Jul 10, 2025	34.75	35.61	34.53	34.59	34.50	-0.46%	129,968
Jul 9, 2025	34.03	34.75	33.34	34.75	34.65	3.18%	190,036
Jul 8, 2025	33.26	34.38	33.00	33.68	33.59	2.09%	178,694
Jul 7, 2025	33.36	33.84	32.93	32.99	32.90	-2.08%	141,474
Jul 3, 2025	34.12	34.12	33.41	33.69	33.60	-1.20%	81,766
Jul 2, 2025	33.44	34.20	33.04	34.10	34.01	2.62%	157,412
Jul 1, 2025	31.97	33.76	31.95	33.23	33.14	3.36%	156,272
Jun 30, 2025	32.68	32.99	31.55	32.15	32.06	-1.83%	112,586
Jun 27, 2025	31.91	32.84	31.90	32.75	32.66	3.02%	319,181
Jun 26, 2025	31.78	32.03	31.54	31.79	31.70	0.38%	117,023
Jun 25, 2025	32.29	32.46	31.61	31.67	31.58	-1.95%	107,123
Jun 24, 2025	32.01	32.53	31.98	32.30	32.21	1.60%	100,186
Jun 23, 2025	31.24	31.81	30.90	31.79	31.70	1.57%	77,803