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 filings document the company’s reporting as a foreign issuer with U.S.-listed securities, including Form 20-F annual reporting and Form 6-K current reports. The filings cover consolidated financial statements, monthly sales volume, quarterly operating results, accounting differences between TIFRSs and IFRS Accounting Standards issued by the IASB, and disclosures on funds lent, endorsements and guarantees, and derivative transactions.
UMC’s regulatory documents also record board and governance actions, capital budget execution, share repurchase programs, cancellation of restricted employee share awards, and trading or pledging of common shares by directors, executive officers, and 10% shareholders. These filings tie the company’s semiconductor foundry business to formal disclosures on capital structure, financial reporting, ownership activity, and corporate approvals.
UNITED MICROELECTRONICS CORP director and President & COO Ming-Chih Hsu has filed an initial Form 3 reporting beneficial ownership of 8,403,220 common shares held directly. This total includes 1,777,700 shares of Restricted Stock Awards that are scheduled to vest annually on December 5 from 2026 through 2029.
UNITED MICROELECTRONICS CORP director and Chief Executive Officer Jason Shi Wang filed a Form 3 reporting beneficial ownership of 32,655,440 common shares. This filing establishes his reported equity position as an insider.
The reported holdings include 14,200,000 common shares pledged as collateral to secure certain obligations and 3,515,400 shares subject to Restricted Stock Awards. A specified number of these RSA shares are scheduled to vest annually on December 5 from 2026 through 2029.
UNITED MICROELECTRONICS CORP director Hung Chia-Tsung has filed an initial ownership report showing substantial common share holdings. He reports direct ownership of 63,241,892 common shares, which includes 3,515,400 shares of Restricted Stock Awards that are scheduled to vest annually on December 5 from 2026 to 2029.
He also reports indirect ownership of 1,269,435 common shares held by his spouse. This Form 3 does not reflect new buying or selling activity; it establishes Hung’s current equity position in the company as he serves as Chairman and Chief Strategy Officer.
United Microelectronics Corporation filed a Form 6-K covering several corporate updates. Its major subsidiary United Semiconductor (Xiamen) Co., Ltd. held a shareholders’ meeting on 2026/03/12, approving the 2025 annual audited financial report and the 2026 annual operating budget, and amending its asset acquisition and disposal procedures.
UMC also completed a small capital reduction related to cancellation of restricted stock awards. Paid-in capital decreased from NT$125,881,563,440 to NT$125,785,246,190, and shares outstanding fell from 12,588,156,344 to 12,578,524,619. Book value per share rose slightly from NT$30.17 to NT$30.19.
The filing notes changes in insider holdings: Senior Vice President Chitung Liu held 4,661,917 UMC common shares as of January 31, 2026 and 4,612,917 shares as of February 28, 2026, a decrease of 49,000 shares. No pledges or releases of pledges were reported for directors, executive officers, or 10% shareholders over the same period.
United Microelectronics Corporation reported February 2026 net sales of NT$ 19,345,126 thousand, up 6.33% from NT$ 18,193,515 thousand a year earlier. Year-to-date 2026 net sales reached NT$ 40,207,276 thousand, a 5.81% increase over NT$ 38,000,310 thousand in 2025.
The company reported no funds lent to other parties and no endorsements or guarantees for February 2026. In financial derivatives, unwritten-off forward contracts totaled NT$ 685,740 thousand with a fair value of NT$ 8,522 thousand and net profit from fair value of NT$ 9,176 thousand, alongside realized loss of NT$ 2,510 thousand on written-off forwards of NT$ 1,008,616 thousand.
UMC also plans to attend the “2026 Taiwan Corporate Day” hosted by Citi on March 9–10, 2026, and the “Taiwan CEO-CFO Conference” hosted by J.P. Morgan on March 11–12, 2026, both in Taipei.
United Microelectronics Corporation filed its audited consolidated financial statements for 2025, showing stable scale but lower profitability versus 2024. Operating revenues in 2025 were NT$237,553,199 thousand, up slightly from NT$232,302,584 thousand, while operating income declined to NT$43,948,688 thousand from NT$51,612,570 thousand.
Net income attributable to shareholders of the parent was NT$41,716,249 thousand in 2025, down from NT$47,210,930 thousand, with basic earnings per share decreasing from NT$3.80 to NT$3.34. Total assets were NT$578,996,009 thousand and total equity NT$379,855,440 thousand as of December 31, 2025.
The company generated strong cash flows from operations of NT$99,864,187 thousand in 2025, compared with NT$93,872,042 thousand in 2024, and ended 2025 with cash and cash equivalents of NT$110,660,052 thousand. Inventories, a key balance in a fast-moving semiconductor market, stood at NT$37,228,383 thousand at year-end 2025.
United Microelectronics Corporation reported its 2025 results and a series of major board decisions. Consolidated revenue reached NT$237,553 million, with net income attributable to stockholders of NT$41,716 million and basic EPS of NT$3.34. The board approved a cash dividend of NT$2.60 per share, totaling NT$32,704,164,009, returning substantial cash to shareholders.
The company approved acquisition of machinery and equipment from ASML Singapore for NT$1,578,719,526 to support production. It cancelled 9,631,725 restricted shares (capital reduction NT$96,317,250) and authorized up to 67,000,000 new restricted stock awards, about 0.54% of outstanding shares, with multi‑year performance and ESG vesting targets. Leadership changes were confirmed, with Jason Wang becoming CEO and Ming Hsu appointed President & COO and board member, while the board also approved a NT$16,800,000 donation to the UMC Science and Culture Foundation and set the 2026 AGM for May 27, 2026.
United Microelectronics Corporation filed a Form 6-K detailing several board actions involving its subsidiaries and governance. The board of major subsidiary United Semiconductor (Xiamen) Co., Ltd. approved convening a 2026 shareholders’ meeting on March 12, 2026 in Xiamen, China, to acknowledge its 2025 annual audited financial report and 2026 operating budget and to discuss amendments to its asset acquisition and disposal procedures.
Separately, the board resolved that subsidiary UMC GROUP (USA) will not distribute dividends, retaining remaining surplus as working capital based on an audit report. The filing also notes a governance change: Hsun Chieh Investment Co., Ltd., a juristic-person director, replaced its representative on UMC’s board, appointing Ming Hsu, Executive Vice President of UMC, to succeed former representative director SC Chien, effective February 24, 2026.
United Microelectronics Corporation filed a Form 6-K providing corporate schedule and insider ownership updates. The company announced that its board of directors is expected to meet on February 25, 2026 to review and approve the 2025 financial reports. The notice for this board meeting was issued on February 13, 2026. The filing also reports insider shareholdings for January 2026, showing that independent director Su Lin Wang held 101,000 UMC shares as of January 31, 2026, up from zero at December 31, 2025. No pledges or releases of pledges on UMC common shares by directors, executive officers, or 10% shareholders were reported for this period.
United Microelectronics Corporation reports that January 2026 net sales were NT$20,862,150 thousand, up from NT$19,806,795 thousand in January 2025, a 5.33% increase. Year-to-date net sales figures match January, reflecting the same 5.33% growth.
The company reports no funds lent to other parties and no endorsements or guarantees for January 2026. In financial derivatives not designated for hedging, UMC held forward contracts with an unwritten-off notional amount of NT$565,380 thousand, a fair value of NT$3,920 thousand, and a net profit from fair value changes of NT$4,574 thousand. Written-off forward contracts totaled NT$691,840 thousand with a realized loss of NT$3,346 thousand.