UNITED MICROELECTRONICS CORP (UMC) Insider Trading & SEC Filings
Last SEC filing
UNITED MICROELECTRONICS CORP (UMC) has filed 2 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-13. Insider sales over the same period: 2 transactions worth $296.00M. InsiderAlpha tracks every UMC SEC filing - Form 4, Form 144, and 8-K - in real time, including Rule 10b5-1 plan detection.
About UNITED MICROELECTRONICS CORP (UMC)
UNITED MICROELECTRONICS CORP trades under the ticker UMC. InsiderAlpha tracks 2 primary SEC Form 4 filings from 2 reporting insiders for UMC since 2026, sourced directly from SEC EDGAR.
| SEC CIK | 0001033767 |
|---|
90-Day SEC Filing Activity
| Insider sales (90d) | 2 ($296.00M) |
|---|---|
| Form 4 filings (90d) | 2 |
| Latest Form 4 filing | 2026-07-13 |
Recent UMC Insider Transactions (Form 4)
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Chitung Liu | CFO & SVP | S - Open-market sale | 1.90M | $154.89 | $294.29M | SEC | |
| Che-Jen Hu | Vice President | S - Open-market sale | 10.0K | $171.30 | $1.71M | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for UNITED MICROELECTRONICS CORP (UMC). Updated in real time as new filings are submitted to the SEC.
Most-Active UMC Insiders - Last 90 Days
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Che-Jen Hu | 1 | $1.71M |
| Chitung Liu | 1 | $294.29M |
Recent Insider Filings
- - Chitung Liu (CFO & SVP)
- - Che-Jen Hu (Vice President)
Form 4 Transaction Code Reference
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in UMC insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
UMC Insider Trading - FAQ
- What is the latest insider trade for UMC?
- UNITED MICROELECTRONICS CORP (UMC) had 2 insider filings in the last 90 days, with the most recent on 2026-07-13. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
- How many insiders are buying UMC stock?
- 0 insider purchases of UMC were filed in the last 90 days.
- How many insiders are selling UMC stock?
- 2 insider sales of UMC were filed in the last 90 days, totaling $296.00M.
- Where can I see UMC SEC filings (Form 4, 10-K, 10-Q, 8-K)?
- This page tracks UMC Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Learn More
- What is SEC Form 4?
- How to read insider buying signals
- Rule 10b5-1 trading plans explained
- The cluster buying signal
Open the live UMC dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.