United Microelectronics ($UMC) Insider Trading & Smart Money Activity
United Microelectronics Corporation ($UMC) has 3 insider trades and 1 13F position change on file. In the last 12 months on the open market, no insider bought and 2 insiders sold ($5.06M), net -$5.06M.
- Insider buyers (12 mo)
- 0
- Insider sellers (12 mo)
- 2
- Net insider $ (12 mo)
- -$5.06M
- Congress trades (12 mo)
- 0
- 13F moves on file
- 1
- Analyst ratings on file
- 0
UMC insider buying and selling by quarter
| Quarter | Insider buys | Insider sales | Congress buys / sales | 13F added / cut |
|---|---|---|---|---|
| Q1 2026 | 0 | 0 | 0 / 0 | 0 / 0 |
| Q2 2026 | 0 | 2 · $3.43M | 0 / 0 | 0 / 0 |
| Q3 2026 | 0 | 1 · $1.63M | 0 / 0 | 0 / 0 |
| Q4 2026 | 0 | 0 | 0 / 0 | 1 / 0 |
Insider buys and sales count open-market trades only (Form 4 codes P and S). Grants, option exercises and tax withholding are left out.
All UMC insider, congress, 13F and analyst activity
| Date | Source | Who | Action | Shares | Value / amount | ΔOwn | 1W | 1M | 6M | Filing | Story |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 13F | Euro Pacific Asset Management | Added | +519 sh | $364.46K | Read | ||||||
| Insider | Jen-Tsung LinVice President | Sell (Open-market sale) | 10K sh | $1.63M | -4.1% | — | |||||
| Insider | Che-Jen HuVice President | Sell (Open-market sale) | 10K sh | $1.71M | -12.4% | -29.2% | Read | ||||
| Insider | Che-Jen HuVice President | Sell (Open-market sale) | 10K sh | $1.71M | -12.4% | -29.2% | Read |
1W / 1M / 6M = how UMC moved from the trade or filing date.
Insider trading in UMC: who is buying and selling
| Insider | Role | Trades | Open-market net | Shares held | Last trade |
|---|---|---|---|---|---|
| Jen-Tsung Lin | Vice President | 1 | -$1.63M | Sep 22, 2026 | |
| Che-Jen Hu | Vice President | 2 | -$3.43M | Jun 30, 2026 |
Institutions moving UMC (13F)
Frequently asked questions
Are UMC insiders buying or selling?
Over the last 12 months 0 insiders made 0 open-market purchases worth $0 and 2 insiders made 3 open-market sales worth $5.06M, a net -$5.06M.
What is the latest insider trade in UMC?
Jen-Tsung Lin, Vice President filed a sell (open-market sale) of 10K sh worth $1.63M on Sep 22, 2026.
Which institutions changed their UMC positions?
Recent 13F filers moving the stock include Euro Pacific Asset Management.
Other semiconductors stocks
Data comes from public SEC Form 4 and 13F filings and STOCK Act disclosures. Dates are the trade or filing date reported. This page is for research only and is not investment advice.
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