# United Microelectronics Corp: overview UMC · NYSE · CIK 1033767 · [Technology](/sectors/technology.md) · fiscal year ends Dec 31 Pages: [Overview](/companies/umc.md) · [Financials](/companies/umc/financials.md) · [Filings](/companies/umc/filings.md) · [Insiders](/companies/umc/insiders.md) Revenue is not reported in this company’s XBRL financial statements. ## Last eight quarters Not reported. ## Last five fiscal years | Line item | Unit | FY2020 (2020-12-31) | FY2021 (2021-12-31) | FY2022 (2022-12-31) | FY2023 (2023-12-31) | FY2024 (2024-12-31) | | --- | --- | ---: | ---: | ---: | ---: | ---: | | Revenue | $m | [6,297](/filings/0001564590-21-021578.md) | [7,679](/filings/0001193125-22-125284.md) | [9,069](/filings/0001193125-23-119772.md) | [7,268](/filings/0001193125-24-111429.md) | [7,085](/filings/0001193125-25-092142.md) | | Gross margin | % | [22.1%](/filings/0001564590-21-021578.md) | [33.8%](/filings/0001193125-22-125284.md) | [45.1%](/filings/0001193125-23-119772.md) | [34.9%](/filings/0001193125-24-111429.md) | [32.6%](/filings/0001193125-25-092142.md) | | Operating margin | % | [12.4%](/filings/0001564590-21-021578.md) | [24.3%](/filings/0001193125-22-125284.md) | [37.4%](/filings/0001193125-23-119772.md) | [26.0%](/filings/0001193125-24-111429.md) | [22.2%](/filings/0001193125-25-092142.md) | | Net margin | % | [12.9%](/filings/0001564590-21-021578.md) | [24.1%](/filings/0001193125-22-125284.md) | [32.1%](/filings/0001193125-23-119772.md) | [26.8%](/filings/0001193125-24-111429.md) | [21.0%](/filings/0001193125-25-092142.md) | | Diluted EPS | $ per share | [0.07](/filings/0001564590-21-021578.md) | [0.15](/filings/0001193125-22-125284.md) | [0.23](/filings/0001193125-23-119772.md) | [0.16](/filings/0001193125-24-111429.md) | [0.12](/filings/0001193125-25-092142.md) | | Free cash flow | $m | [1,403](/filings/0001564590-21-021578.md) | [1,525](/filings/0001193125-22-125284.md) | [2,139](/filings/0001193125-23-119772.md) | [(179)](/filings/0001193125-24-111429.md) | [163](/filings/0001193125-25-092142.md) | - Revenue. XBRL Revenue: ifrs-full:Revenue. - Gross margin (gross profit / revenue). XBRL Gross profit: ifrs-full:GrossProfit; Revenue: ifrs-full:Revenue. - Operating margin (operating income / revenue). XBRL Operating income: ifrs-full:ProfitLossFromOperatingActivities; Revenue: ifrs-full:Revenue. - Net margin (net income / revenue). XBRL Net income: ifrs-full:ProfitLossAttributableToOwnersOfParent; Revenue: ifrs-full:Revenue. - Diluted EPS. XBRL Diluted EPS: ifrs-full:DilutedEarningsLossPerShare. - Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: ifrs-full:CashFlowsFromUsedInOperatingActivities; Capital expenditure: ifrs-full:PurchaseOfPropertyPlantAndEquipmentClassifiedAsInvestingActivities. Each value links to the filing it came from. d marks a derived value. A ratio is not reported when any input is missing. ## Insider purchases and sales The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/umc/insiders.md) None in coverage. ## Funds that report holding it From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md) | Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before | | --- | --- | ---: | ---: | --- | --- | | [BlackRock, Inc.](/funds/2012383.md) | 2026-06-30 | $858.3m | 31,544,454 | | Added +4,048,574 | | [UBS Group AG](/funds/1610520.md) | 2026-06-30 | $316.5m | 11,632,967 | | Added +3,457,823 | | [GOLDMAN SACHS GROUP INC](/funds/886982.md) | 2026-06-30 | $302.3m | 11,109,785 | | Added +5,234,921 | | [BANK OF AMERICA CORP /DE/](/funds/70858.md) | 2026-06-30 | $277.0m | 10,181,208 | | Added +7,577,990 | | [VANGUARD CAPITAL MANAGEMENT LLC](/funds/2100119.md) | 2026-06-30 | $234.1m | 8,601,967 | | Reduced −386,476 | | [MORGAN STANLEY](/funds/895421.md) | 2026-06-30 | $225.5m | 8,285,573 | | Reduced −492,330 | | [AQR CAPITAL MANAGEMENT LLC](/funds/1167557.md) | 2026-06-30 | $210.0m | 7,718,125 | | Reduced −6,995,905 | | [Rafferty Asset Management, LLC](/funds/1389426.md) | 2026-06-30 | $208.2m | 7,653,378 | | Added +2,669,725 | | [Man Group plc](/funds/1637460.md) | 2026-06-30 | $152.2m | 5,593,427 | | Reduced −135,474 | | [CITIGROUP INC](/funds/831001.md) | 2026-06-30 | $147.3m | 5,414,362 | | Added +1,117,640 | ## Recent filings [All 576 filings](/companies/umc/filings.md) | Filed | Accepted | Form | What it is | Accession | | --- | --- | --- | --- | --- | | 2026-10-28 | 06:04 ET | [6-K](/filings/0001193125-26-435003.md) | Report of a foreign private issuer, period 2026-10-28 | 0001193125-26-435003 | | 2026-10-28 | 06:01 ET | [6-K](/filings/0001193125-26-434992.md) | Report of a foreign private issuer, period 2026-10-28 | 0001193125-26-434992 | | 2026-10-23 | 06:00 ET | [6-K](/filings/0001193125-26-429369.md) | Report of a foreign private issuer, period 2026-10-23 | 0001193125-26-429369 | | 2026-10-13 | 06:01 ET | [6-K](/filings/0001193125-26-419602.md) | Report of a foreign private issuer, period 2026-10-13 | 0001193125-26-419602 | | 2026-10-06 | 06:02 ET | [6-K](/filings/0001193125-26-414888.md) | Report of a foreign private issuer, period 2026-10-06 | 0001193125-26-414888 | | 2026-10-05 | 09:27 ET | [6-K](/filings/0001193125-26-413371.md) | Report of a foreign private issuer, period 2026-10-05 | 0001193125-26-413371 | | 2026-09-29 | 06:03 ET | [6-K](/filings/0001193125-26-405903.md) | Report of a foreign private issuer, period 2026-09-29 | 0001193125-26-405903 | | 2026-09-04 | 06:03 ET | [6-K](/filings/0001193125-26-382689.md) | Report of a foreign private issuer, period 2026-09-04 | 0001193125-26-382689 | | 2026-09-02 | 06:03 ET | [6-K](/filings/0001193125-26-379275.md) | Report of a foreign private issuer, period 2026-09-02 | 0001193125-26-379275 | | 2026-08-26 | 06:20 ET | [6-K](/filings/0001193125-26-365826.md) | Report of a foreign private issuer, period 2026-08-26 | 0001193125-26-365826 | ## Latest annual report [Form 20-F for the fiscal year ended Dec 31, 2025](/filings/0001193125-26-193757.md), filed Apr 30, 2026. ## Forecast league Not in this season’s league. [This season’s league](/leagues.md) ## About the filer - CIK: 1033767 - Tickers: UMC - Exchange: NYSE - SIC code: 3674 Semiconductors & Related Devices - State of incorporation: F5 - Filer category: Large accelerated filer Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 28, 2026, 06:06 ET. No prices; not investment advice.