Welcome to our dedicated page for United Microelec SEC filings (Ticker: UMC), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
United Microelectronics Corporation (UMC) (NYSE: UMC; TWSE: 2303) is a foreign private issuer that reports to the U.S. Securities and Exchange Commission primarily through Form 20-F and Form 6-K filings. These documents provide detailed information on the company’s semiconductor foundry operations, financial performance, risk factors, and material events. UMC’s recent SEC activity includes a series of Form 6-K current reports, each signed on behalf of the company and referencing attached exhibits with additional disclosures.
On this page, Stock Titan aggregates UMC’s SEC filings, including annual reports on Form 20-F, which typically contain audited financial statements, descriptions of the business, technology platforms, geographic footprint, and governance information. Form 6-K submissions are used to furnish interim updates such as operating results, monthly sales data, and other announcements that UMC also releases through news wires.
Investors can use these filings to analyze topics such as wafer capacity, revenue by region and application, customer mix between fabless companies and IDMs, and the company’s capital expenditures and cash flow. Regulatory documents may also discuss UMC’s quality certifications, climate-related commitments, and other operational considerations relevant to its role as a global semiconductor foundry.
Stock Titan enhances access to UMC’s regulatory history by pairing real-time updates from EDGAR with AI-powered summaries that explain the key points of lengthy filings. Users can quickly understand the implications of a new 6-K or annual 20-F without reading every line, while still having direct access to the original documents for deeper review.
BlackRock, Inc. filed an amended Schedule 13G/A reporting beneficial ownership of 817,485,069 shares of United Microelectronics Corp common stock, representing 6.5% of the class. The filing shows sole voting power for 771,583,164 shares and sole dispositive power for 817,485,069 shares.
The filing is signed by a Managing Director and includes Exhibit 24 (Power of Attorney) and Exhibit 99 (Item 7 information). The filing states the holdings reflect aggregated Reporting Business Units of BlackRock, Inc.
United Microelectronics Corporation (UMC) reported consolidated Q1 2026 revenue of NT$61.0 billion, up from NT$57.9 billion a year earlier, driven mainly by wafer sales. Gross profit rose to NT$17.8 billion, and operating income increased to NT$11.3 billion from NT$9.8 billion.
Net income more than doubled to NT$16.1 billion versus NT$7.7 billion in Q1 2025, helped by NT$2.8 billion of profit from associates and joint ventures and NT$2.1 billion of fair value gains. Basic and diluted earnings per share were NT$1.29, up from NT$0.62. Operating cash flow was NT$22.0 billion, with significant ongoing capital expenditure of NT$12.5 billion.
United Microelectronics Corporation reported first quarter 2026 consolidated revenue of NT$61.04 billion, up 5.5% year-on-year and down 1.2% from the prior quarter. Gross margin was 29.2%, with net income attributable to shareholders of NT$16.17 billion and basic earnings per share of NT$1.29.
Technology mix and utilization remained healthy, with 22/28nm accounting for 34% of revenue, 22nm alone contributing 14%, and capacity utilization at 79%. The board approved the Q1 2026 financial statements, a capital budget of NT$4.683 billion for capacity deployment, and a small capital reduction by cancelling 1,539,749 unvested employee restricted shares (0.0122% of capital).
The board also authorized a share repurchase program of up to 50,000,000 common shares, or 0.40% of issued shares, between April 30 and June 29, 2026, with a price range of NT$52.50 to NT$109.50 and a monetary ceiling of NT$212,951,478 thousand, to be transferred to employees. For second quarter 2026, UMC guides to high single-digit growth in wafer shipments, a low single-digit increase in average selling prices in USD, gross margin around 30%, low-80% capacity utilization, and 2026 capital expenditures of US$1.5 billion.
United Microelectronics Corporation filed a Form 6-K to announce scheduling details for its first-quarter 2026 financial reporting. The company’s board of directors was formally notified on 2026/04/21 of an upcoming meeting.
The board meeting is expected to be held on 2026/04/29 to review and approve the Q1 2026 consolidated financial report. No financial results or performance figures are included in this filing; it only provides the timetable for the board’s consideration of the quarterly report.
United Microelectronics Corporation filed an update covering two main items. First, the company will hold its Q1 2026 investor conference on April 29, 2026 at 17:00 via an online teleconference to discuss Q1 2026 financial and operating results.
Second, the report lists March 2026 shareholding changes for several senior executives and a 10% shareholder, showing modest reductions in their UMC common share holdings compared with February 28, 2026, and notes that there were no new share pledges or pledge releases during the period.
United Microelectronics Corporation reported steady March 2026 operating data. March net sales were NT$20,830,626 thousand, up 4.89% from March 2025. Year-to-date 2026 net sales reached NT$61,037,902 thousand, a 5.49% increase over the same period in 2025.
The company reported no funds lent to other parties and no endorsements or guarantees in March 2026. For financial derivatives, UMC had unwritten-off forward trading contracts with a notional amount of NT$1,118,250 thousand, a negative fair value of NT$11,945 thousand, a net loss from fair value of NT$11,292 thousand, and realized losses of NT$6,276 thousand on written-off forwards.
United Microelectronics Corporation filed a report explaining new U.S. disclosure requirements for its leaders. Due to the Holding Foreign Insiders Accountable Act, effective from March 18, 2026, the company’s directors and officers must publicly report their ownership of, and transactions in, UMC equity securities under Section 16(a) of the U.S. Securities Exchange Act of 1934.
These insider ownership and trading disclosures will be available on the U.S. SEC’s EDGAR website, giving investors a direct view into how key insiders hold and trade UMC stock.
UNITED MICROELECTRONICS CORP CFO & SVP Liu Chitung has filed an initial Form 3 reporting his ownership of UMC common shares. He reports 5,222,917 common shares held directly, including 1,210,000 Restricted Stock Awards that will vest annually on December 5 from 2026 to 2029.
He also reports indirect ownership of 150,000 common shares held by his spouse and 2,000,000 common shares held through CTBC Bank Trust, which is described as a trust with discretion reserved.
UNITED MICROELECTRONICS CORP director reports initial holdings. Director Wang Su-Lin has reported beneficial ownership of 101,000 Common Shares, held directly, with no specific buy or sell transactions disclosed. This Form 3 mainly establishes the director’s starting ownership position for future insider reporting.
UNITED MICROELECTRONICS CORP filed a Form 3 insider report for director Wu Ling-Ling. This filing identifies Wu as a board member and provides an initial disclosure of beneficial ownership status. The excerpt shows no reportable transactions or derivative positions and no specific share holdings listed.