UMC
insider transactions NYSEUNITED MICROELECTRONICS CORP — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 90d
-1.9M
0 buy · 1.9M sell
Net value · 90d
-$296.0M
$0 in · $296.0M out
Sentiment · 90d
Net selling
0% buying · 100% selling
Open-market trades · 90d
2
0 buy · 1.9M sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for the daily net. Green = net buying, red = net selling.
Transactions · 90d
-
Sell·S
Chitung Liu KEY
CFO & SVP
$294.3M · $154.89/sh
1.9M sh
Own -36%
-
Sell·S
Che-Jen Hu KEY
Vice President
$1.7M · $171.30/sh
10.0K sh
Own -0%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jul 13, 2026 |
Chitung Liu
KEY
|
Sell S | 1.9M | $294.3M |
| Jun 30, 2026 |
Che-Jen Hu
KEY
|
Sell S | 10.0K | $1.7M |
Buy Sell Non-market (grant · exercise · gift)
About UMC insider trading
This page tracks insider transactions for UNITED MICROELECTRONICS CORP (UMC) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.