SCHEDULE: BlackRock Discloses 6.5% Stake in United Microelectronics Corp

BlackRock, Inc. has filed a Schedule 13G, reporting beneficial ownership of 6.5% of United Microelectronics Corp.'s common stock as of March 31, 2026.

Summary

• BlackRock, Inc. has reported a significant ownership stake in United Microelectronics Corp. (UMC).
• As of March 31, 2026, BlackRock beneficially owns 817,485,069 shares of UMC's common stock.
• This represents approximately 6.5% of the total outstanding shares of UMC's common stock.
• BlackRock holds sole voting power over 771,583,164 shares and sole dispositive power over 817,485,069 shares.
• The filing is an amendment to a previous Schedule 13G filing.
• BlackRock, Inc. is a Delaware-incorporated entity with its principal business office located at 50 Hudson Yards, New York, NY 10001.
• The filing clarifies that the reported ownership reflects securities beneficially owned by certain business units of BlackRock, Inc. and its subsidiaries and affiliates.

Sentiment

Score: 6

Explanation: StockSavvy.ai views this as a neutral to slightly positive filing, primarily due to the significant investment by a major institutional player like BlackRock, indicating a level of confidence in UMC. However, the lack of operational or financial details limits a more strongly positive assessment.

Positives

• BlackRock, a major global investment management corporation, holds a substantial stake in United Microelectronics Corp., indicating confidence in the company's value or future prospects.
• The clear disclosure of ownership percentages and voting/dispositive power provides transparency to the market regarding significant institutional holdings.

Negatives

• No specific financial performance data or operational updates are provided in this filing, making it difficult to assess the underlying reasons for BlackRock's investment or potential changes in strategy.

Risks

• The filing does not explicitly mention any risks associated with the investment or the company itself.
• Potential risks for UMC could include increased competition in the semiconductor industry, geopolitical tensions affecting supply chains, and fluctuations in global demand for electronic components.

Future Outlook

This filing is a disclosure of current ownership and does not contain forward-looking statements or guidance from United Microelectronics Corp. or BlackRock regarding future performance or strategy.

Management Comments

• "In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release."
• "Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of UNITED MICROELECTRONICS CORP. No one person's interest in the common stock of UNITED MICROELECTRONICS CORP is more than five percent of the total outstanding common shares."
• "By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under 240.14a-11."

Industry Context

StockSavvy.ai notes that BlackRock's increased stake in United Microelectronics Corp. (UMC) aligns with broader trends of significant institutional investment in the semiconductor industry, particularly in foundries. UMC, as a major player in chip manufacturing, is central to global technology supply chains, and substantial holdings by large asset managers like BlackRock often signal perceived stability and growth potential within this critical sector.

Stakeholder Impact

• Shareholders: The disclosure of a significant stake by BlackRock may be viewed positively by other shareholders, potentially indicating institutional confidence in the company's long-term value. It also provides transparency regarding major ownership.
• Employees: While not directly impacted by this filing, sustained institutional interest can contribute to company stability and growth, indirectly benefiting employees.
• Creditors: Increased institutional ownership can be seen as a sign of financial stability, which may be viewed favorably by creditors.
• Suppliers and Customers: No direct impact is indicated by this filing.

Next Steps

• BlackRock will continue to monitor its investment in United Microelectronics Corp.
• Further filings may be required if BlackRock's ownership stake changes significantly.

Key Dates

Keywords

United Microelectronics Corp, UMC, BlackRock, Schedule 13G, SEC Filing, Common Stock, Beneficial Ownership, Institutional Investor, Semiconductor, Taiwan