UNITED MICROELECTRONICS (UMC) stock: insider trades, news & valuation
Heavy sellingShare price and insider trades
UNITED MICROELECTRONICS insider trading at a glance (Oct 9, 2026): in the past 12 months, 0 insiders bought $0 and 3 sold $526M of UMC stock on the open market.
Get emailed when insiders cluster-buy stocks like UMC
Free alerts the day a new cluster buy is filed, plus the Monday report of the week's biggest insider trades.
Free · unsubscribe anytime · not investment advice · see a sample issue
UMC insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | — | 0 |
| Q3 2026 | — | 0 | $525M | 4 |
| Q2 2026 | — | 0 | $1.7M | 1 |
Valuation, profit and volume
Summary
Over the past 12 months, 0 UNITED MICROELECTRONICS CORP insiders reported open-market purchases totaling $0, while 3 insiders reported sales totaling $526M. 0 of 5 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Sep 22SEC | Jen-tsung LinPresident | Sell | 10,0001,172,140 held (−1%) | $163.00 | $1.6M | -85.9% | — |
| Sep 17SEC | Chitung LiuCFO | Sell | 1,200,0003,039,757 held (−28%) | $142.33 | $171M | -83.9% | — |
| Sep 17SEC | Chitung LiuCFO | Sell | 400,0002,639,757 held (−13%) | $145.00 | $58.0M | -84.2% | — |
| Jul 13SEC | Chitung LiuCFO | Sell | 1,900,0003,322,917 held (−36%) | $154.89 | $294M | -85.2% | — |
| Jun 30SEC | Che-jen HuPresident | Sell | 10,0003,214,080 held (−0%) | $171.30 | $1.7M | -86.6% | — |
Insiders at UNITED MICROELECTRONICS CORP
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Chitung LiuCFO | — | $523M | Sep 17, 2026 | — |
| Che-jen HuPresident | — | $1.7M | Jun 30, 2026 | — |
| Jen-tsung LinPresident | — | $1.6M | Sep 22, 2026 | — |
UMC stock: common questions
Are UNITED MICROELECTRONICS CORP insiders buying UMC stock?
In the past 12 months, 0 insiders reported open-market purchases of UMC worth $0.
Are UNITED MICROELECTRONICS CORP insiders selling UMC stock?
3 insiders reported sales worth $526M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is UMC's 52-week range?
Over the past year UMC has traded between $6.90 and $27.53. It last closed at $22.96 on Oct 9, 2026.