BlackRock Reports 6.5% Stake in United Microelectronics Corp (UMC) via Schedule 13G/A

On April 29, 2026, BlackRock, Inc. filed a Schedule 13G/A with the SEC, reporting a significant stake in United Microelectronics Corp (UMC). As of the event date on March 31, 2026, BlackRock beneficially owns 817,485,069 shares of common stock, representing 6.5% of the company's outstanding shares. This filing marks an increase from a previously reported 0.0% position, indicating a substantial new or restored reporting threshold for the investment firm. The filing details that BlackRock holds sole dispositive power over all 817,485,069 shares and sole voting power over 771,583,164 shares. The securities were acquired in the ordinary course of business and are not intended to influence or change the control of the issuer. Various subsidiaries under the BlackRock corporate umbrella are credited with the ownership interest, though no single individual's interest exceeds 5%. The total value of the holdings is estimated at approximately $9.53 billion based on recent market data.