United Microelectronics Corporation (UMC)

NYSE: UMC · Real-Time Price · USD

20.77

+0.91 (4.58%)

At close: Sep 4, 2026, 4:00 PM EDT

20.55

-0.22 (-1.06%)

After-hours: Sep 4, 2026, 7:59 PM EDT

United Microelectronics Stock Price History

Historical Data

Date	Open	High	Low	Close	Adj. Close	Change	Volume
Sep 4, 2026	20.48	21.03	20.33	20.77	20.77	4.58%	9,960,542
Sep 3, 2026	19.57	19.95	19.45	19.86	19.86	-0.55%	5,941,307
Sep 2, 2026	19.54	20.14	19.49	19.97	19.97	-2.44%	8,748,368
Sep 1, 2026	20.43	20.84	20.19	20.47	20.47	2.97%	17,836,155
Aug 31, 2026	20.00	20.31	19.74	19.88	19.88	0.45%	8,830,560
Aug 28, 2026	20.65	20.78	19.59	19.79	19.79	3.78%	19,171,757
Aug 27, 2026	18.80	19.08	18.68	19.07	19.07	0.21%	9,116,097
Aug 26, 2026	19.41	19.46	18.84	19.03	19.03	-2.91%	6,089,635
Aug 25, 2026	19.50	20.00	19.42	19.60	19.60	2.89%	10,102,301
Aug 24, 2026	19.50	19.50	18.77	19.05	19.05	3.87%	14,180,653
Aug 21, 2026	18.45	18.61	18.28	18.34	18.34	1.89%	5,928,772
Aug 20, 2026	18.03	18.24	17.88	18.00	18.00	-0.66%	9,860,935
Aug 19, 2026	18.80	18.97	17.97	18.12	18.12	-1.95%	11,825,605
Aug 18, 2026	18.56	18.76	18.14	18.48	18.48	-5.38%	15,922,275
Aug 17, 2026	19.38	19.77	19.27	19.53	19.53	1.98%	7,622,573
Aug 14, 2026	18.94	19.17	18.75	19.15	19.15	-1.19%	7,134,650
Aug 13, 2026	19.25	19.72	19.23	19.38	19.38	0.36%	7,645,172
Aug 12, 2026	19.67	19.67	19.30	19.31	19.31	1.95%	10,475,194
Aug 11, 2026	19.35	19.45	18.91	18.94	18.94	0.80%	7,485,604
Aug 10, 2026	19.27	19.35	18.77	18.79	18.79	0.37%	9,060,318
Aug 7, 2026	18.59	18.82	18.18	18.72	18.72	-2.50%	13,316,627
Aug 6, 2026	18.90	19.57	18.73	19.20	19.20	-0.47%	11,944,826
Aug 5, 2026	19.66	19.95	19.20	19.29	19.29	-6.50%	14,254,336
Aug 4, 2026	19.78	20.85	19.59	20.63	20.63	10.38%	20,030,932
Aug 3, 2026	17.69	18.76	17.49	18.69	18.69	-1.79%	12,054,476
Jul 31, 2026	19.78	20.08	18.82	19.03	19.03	0.48%	15,217,801
Jul 30, 2026	17.53	19.02	17.53	18.94	18.94	10.70%	23,250,080
Jul 29, 2026	17.05	18.13	16.96	17.11	17.11	-1.44%	24,621,817
Jul 28, 2026	16.90	17.70	16.54	17.36	17.36	-9.01%	26,420,527
Jul 27, 2026	20.03	20.15	18.57	19.08	19.08	-2.05%	14,178,472
Jul 24, 2026	19.84	20.08	18.97	19.48	19.48	-6.66%	16,397,830
Jul 23, 2026	20.72	21.11	20.44	20.87	20.87	-1.97%	9,174,700
Jul 22, 2026	21.00	21.60	20.99	21.29	21.29	0.47%	7,335,615
Jul 21, 2026	21.51	21.51	20.89	21.19	21.19	4.38%	17,340,378
Jul 20, 2026	20.69	21.23	20.27	20.30	20.30	-4.47%	11,848,462
Jul 17, 2026	20.55	21.74	20.16	21.25	21.25	-4.67%	20,761,250
Jul 16, 2026	22.73	23.20	22.06	22.29	22.29	-10.55%	20,879,307
Jul 15, 2026	25.60	25.80	24.21	24.92	24.92	4.53%	15,692,122
Jul 14, 2026	24.17	24.40	23.57	23.84	23.84	1.62%	13,168,833
Jul 13, 2026	23.56	23.73	23.01	23.46	23.46	-3.62%	18,469,835
Jul 10, 2026	24.39	24.63	23.77	24.34	24.34	-2.09%	6,695,081
Jul 9, 2026	25.02	25.49	24.65	24.86	24.86	0.53%	11,953,735
Jul 8, 2026	24.41	25.04	24.04	24.73	24.73	5.17%	14,127,560
Jul 7, 2026	24.10	24.47	23.34	23.83	23.51	-7.74%	21,687,918
Jul 6, 2026	25.70	26.78	25.59	25.83	25.49	5.26%	13,180,631
Jul 2, 2026	26.06	26.29	24.15	24.54	24.21	-4.55%	21,014,028
Jul 1, 2026	26.39	26.66	25.68	25.71	25.37	-5.51%	19,750,319
Jun 30, 2026	26.33	27.27	26.14	27.21	26.85	1.38%	14,475,715
Jun 29, 2026	25.70	26.86	24.82	26.84	26.48	4.93%	11,871,422
Jun 26, 2026	25.48	26.09	24.87	25.58	25.24	-7.75%	19,297,927