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United Microelectronics Corporation (UMC)

United Microelectronics Corporation at a glance — key fundamentals, SEC filings, insider buying and selling, and earnings dates.

United Microelectronics Corporation (UMC) is a Semiconductors company based in TW with a market capitalization of $55.7B. Revenue grew 2.3% year-over-year and the company generated $1.6B in free cash flow. This page tracks UMC's SEC filings, insider buying and selling, earnings dates, and key fundamentals in one place.

TW · 20K employees · IPO Sep 19, 2000

Valuation

Valuation & price

$17.20 · as of May 17, 2026 · -38.6% vs 52w high

1.0

P/E ratio

Latest-FY diluted EPS

0.15

P/B ratio

Market cap ÷ book equity

—

Dividend yield

Price — last 12 months

$28.02$17.30$6.58Jul 25Dec 25Jul 26Jul 7, 25$7.55Jul 9, 25$7.70Jul 11, 25$7.50Jul 15, 25$7.48Jul 17, 25$7.53Jul 21, 25$7.50Jul 23, 25$7.48Jul 25, 25$7.30Jul 29, 25$7.12Jul 31, 25$6.84Aug 4, 25$6.81Aug 6, 25$6.74Aug 11, 25$6.72Aug 13, 25$6.84Aug 15, 25$6.88Aug 19, 25$6.80Aug 21, 25$6.74Aug 25, 25$6.66Aug 27, 25$6.72Aug 29, 25$6.58Sep 3, 25$6.65Sep 5, 25$6.80Sep 9, 25$6.87Sep 11, 25$6.77Sep 16, 25$6.83Sep 18, 25$6.99Sep 22, 25$7.26Sep 24, 25$7.48Sep 26, 25$7.54Sep 30, 25$7.58Oct 2, 25$7.29Oct 6, 25$7.35Oct 8, 25$7.55Oct 10, 25$7.18Oct 14, 25$7.40Oct 16, 25$7.43Oct 21, 25$7.45Oct 23, 25$7.52Oct 27, 25$7.57Oct 29, 25$7.39Oct 31, 25$7.71Nov 4, 25$7.60Nov 6, 25$7.31Nov 10, 25$7.43Nov 12, 25$7.24Nov 14, 25$7.14Nov 18, 25$7.06Nov 20, 25$7.12Nov 25, 25$7.27Nov 28, 25$7.46Dec 2, 25$7.78Dec 4, 25$7.87Dec 8, 25$8.05Dec 10, 25$8.00Dec 12, 25$7.87Dec 16, 25$7.89Dec 18, 25$8.07Dec 22, 25$8.13Dec 24, 25$8.00Dec 29, 25$7.97Jan 2, 26$7.84Jan 6, 26$8.12Jan 8, 26$8.55Jan 12, 26$8.85Jan 14, 26$8.79Jan 16, 26$9.30Jan 21, 26$11.13Jan 23, 26$10.54Jan 27, 26$12.48Jan 29, 26$10.58Feb 2, 26$10.04Feb 4, 26$9.95Feb 9, 26$10.05Feb 11, 26$10.30Feb 13, 26$10.42Feb 18, 26$10.23Feb 20, 26$10.40Feb 24, 26$10.92Feb 26, 26$10.30Mar 2, 26$10.51Mar 4, 26$9.88Mar 6, 26$9.60Mar 10, 26$9.48Mar 12, 26$9.35Mar 17, 26$9.52Mar 19, 26$9.26Mar 23, 26$9.09Mar 25, 26$9.31Mar 27, 26$8.87Mar 31, 26$8.98Apr 2, 26$8.67Apr 7, 26$9.31Apr 9, 26$9.53Apr 13, 26$9.70Apr 15, 26$9.95Apr 17, 26$11.66Apr 22, 26$12.71Apr 24, 26$12.28Apr 28, 26$11.66Apr 30, 26$13.06May 4, 26$12.98May 6, 26$15.22May 8, 26$15.42May 12, 26$16.06May 14, 26$17.13May 18, 26$17.12May 20, 26$17.56May 22, 26$18.22May 28, 26$22.68Jun 1, 26$22.89Jun 3, 26$21.42Jun 5, 26$19.70Jun 9, 26$19.88Jun 11, 26$20.68Jun 15, 26$23.08Jun 17, 26$21.76Jun 22, 26$27.50Jun 24, 26$28.02Jun 26, 26$25.58Jul 2, 26$24.54
$6.5852-week range$28.02
Loading valuation history…

Fundamentals

Key fundamentals

$55.7B

Market cap

2.3%

Revenue growth (YoY)

29.0%

Gross margin

$1.6B

Free cash flow (USD)

-$68.6B

Net debt

Net cash position

-1.1%

Share dilution

5/5

Graham criteria passed

Defensive-investor screen

Technology

Sector

Trajectory

Long-term trends

Revenue by year

2016 → 2025

FY 2016$147.9BFY 2017$149.3BFY 2018$151.3BFY 2019$148.2BFY 2020$176.8BFY 2021$213.0BFY 2022$278.7BFY 2023$222.5BFY 2024$232.3BFY 2025$237.6B
$147.9B$237.6B

Free cash flow by year

2016 → 2025

FY 2016$-46.7BFY 2017$7.0BFY 2018$30.5BFY 2019$35.9BFY 2020$37.4BFY 2021$40.4BFY 2022$63.0BFY 2023$-8.0BFY 2024$5.3BFY 2025$52.4B
-$46.7B$52.4B

Gross margin by year

2021 → 2025

FY 202133.8%FY 202245.1%FY 202334.9%FY 202432.6%FY 202529.0%
33.8%29.0%

Value screen

Graham defensive-investor tests

Computing the scorecard — refreshing any stale inputs…

0

Insider buys · 90 days

1

Insider sells · 90 days

Earnings

Last report: 6-K filed Jun 23, 2026

Next expected: not yet scheduled

On the tape

Recent SEC & insider activity

  • Insider sellInsider Sell $1.7MHU CHE-JEN · Vice President · $1.7MJun 30, 2026Filing
  • 6-K filingStock Buy-Back CompletionJun 29, 2026Filing
  • Quarterly reportQuarterly Report FiledJun 23, 2026Filing
  • 6-K filingClarification and Securities DisposalJun 22, 2026Filing
  • 6-K filingSecurities Disposal AnnouncementJun 18, 2026Filing
  • 6-K filingSecurities Disposal AnnouncementJun 16, 2026Filing
  • Quarterly reportQuarterly Report FiledJun 5, 2026Filing
  • 6-K filingConvertible Bond IssuanceJun 3, 2026Filing
  • 6-K filingAcquisition AnnouncementMay 27, 2026Filing
  • 6-K filingInvestor Conference AttendanceMay 22, 2026Filing

Questions

Frequently asked questions

What is United Microelectronics Corporation's market cap?

United Microelectronics Corporation (UMC) has a market capitalization of $55.7B.

What is UMC's P/E ratio?

UMC trades at a price-to-earnings ratio of 1.0, based on its latest fiscal-year diluted earnings per share and the most recent cached price.

What is UMC's price-to-book (P/B) ratio?

UMC trades at 0.15 times book value per share.

Are insiders buying UMC stock?

SEC Form 4 filings show no open-market insider buys at United Microelectronics Corporation in the last 90 days (1 sell).

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Timeline

Every filing, insider trade & earnings on a price-anchored timeline

Filing Analyzer

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News

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Data: SEC EDGAR filings and cached fundamental data; prices and ratios use the most recent cached quote and statements (may lag by up to a day). Educational and research purposes only. Not investment advice.