UMC American Shares Fall Over 10% in Pre-Market Trading
United Microelectronics Corporation (UMC) American depositary shares declined more than 10% in pre-market trading on July 28, 2026. The drop occurred during the pre-market session ahead of the regular trading day on US exchanges. The move marks a significant decline for the Taiwan-based semiconductor manufacturer's US-listed securities, which trade under the UMC ticker symbol.
United Microelectronics Corporation (UMC) American depositary shares declined more than 10% in pre-market trading on July 28, 2026. The drop occurred during the pre-market session, which precedes the regular trading day on US exchanges.