UNITED MICROELECTRONICS CORP (UMC)
Data as of , from SEC Form 4 filings.
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- Jen-Tsung Lin - OfficerOpen-market sale$1.63M
Chitung Liu - Officer
About UNITED MICROELECTRONICS CORP (UMC)
UNITED MICROELECTRONICS CORP files with the SEC under CIK 0001033767 and is classified as semiconductors and related devices. It is grouped with Information Technology companies on this site.
UMC Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 3 | 1,610,000 | $230.43M |
| Other acquisition / disposition | 2 | 2,000,000 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
UMC insider transactions (Form 4)
75 Form 4 filings on record, the earliest from Jul 1, 2026, newest first.
| Traded | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jen-Tsung Lin - Officer | Open-market sale | Commin Shares | 10,000 | $163.00 footnote F1 | $1.63M | |
| ||||||
| Chitung Liu - Officer | Open-market sale | Common Shares | 1,200,000 | $142.33 footnote F1 | $170.80M | |
| Chitung Liu - Officer | Open-market sale | Common Shares | 400,000 | $145.00 footnote F1 | $58.00M | |
| ||||||
| Chitung Liu - Officer | Other | Common Shares | 1,000,000 | $0.00 | - | |
| Chitung Liu - Officer | Other | Common Shares | 1,000,000 | $0.00 | - | |
| Chitung Liu - Officer | Open-market sale | Common Shares | 1,900,000 | $154.89 footnote F1 | $294.29M | |
| ||||||
| Che-Jen Hu - Officer | Open-market sale | Common Shares | 10,000 | $171.30 footnote F1 | $1.71M | |
| ||||||
UMC insider trading FAQ
What is the latest insider trade for UMC?
UNITED MICROELECTRONICS CORP (UMC) had 3 insider filings in the last 90 days, with the most recent on 22 September 2026. The full record for UMC runs to 5 Form 4 filings, the earliest from 1 July 2026. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying UMC stock?
No insider purchases of UMC were filed in the last 90 days.
How many insiders are selling UMC stock?
3 insider sales of UMC were filed in the last 90 days, totaling $230.43M.
Where can I see UMC SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects UMC Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Information Technology companies with insider activity
Recent insider filings
5The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Jen-Tsung Lin view on EDGAR
- - Chitung Liu view on EDGAR
- - Chitung Liu view on EDGAR
- - Chitung Liu view on EDGAR
- - Che-Jen Hu view on EDGAR
Related companies with recent insider activity
Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Insider activity in Information Technology
- Where UMC's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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