UMC
UNITED MICROELECTRONICS CORP · Technology · Market cap $247.6B(Price slightly stale)
Insiders sold $526.4M net in the last 90 days ·3 sellers, 0 buyers· latest Form 4 filed Sep 22, 2026
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$526.4M
reported sales (SEC code S)
Unique Insiders
3
in the rolling window
Latest filing
Sep 22, 2026
LIN JEN-TSUNG
UNITED MICROELECTRONICS CORP (UMC) has 5 SEC Form 4 filings (7 transaction rows) in the rolling window, disclosed by 3 distinct insiders. Most recent filing: Sep 22, 2026.
Inside the rolling window, 3 insiders at UNITED MICROELECTRONICS CORP reported no open-market purchases and 5 open-market sales totaling $526.4M. The most active filer is CFO & SVP Liu Chitung with 3 filings. Insiders have net sold $526.4M over the trailing 6 months. The most recent open-market filing is a sale of 10,000 shares by Vice President LIN JEN-TSUNG, dated Sep 22, 2026, worth $1.6M.
- Industry:Semiconductors
- CEO:Jason S. Wang
- Employees:20,000
- HQ:Hsinchu City, TP, TW
- IPO:2000-09-19
| Source | |||||||
|---|---|---|---|---|---|---|---|
LIN JEN-TSUNGFirst filing | Vice President | Sale | 10,000 | $1.6M | Sep 22 | -23.7% | SEC ↗ |
| CFO & SVP | Sale | 1,200,000 | $170.8M | Sep 17 | -19.6% | SEC ↗ | |
| CFO & SVP | Sale | 400,000 | $58.0M | Sep 17 | -19.6% | SEC ↗ | |
Liu ChitungFirst filing | CFO & SVP | Sale | 1,900,000 | $294.3M | Jul 13 | -16.2% | SEC ↗ |
HU CHE-JENFirst filing | Vice President | Sale | 10,000 | $1.7M | Jul 1 | -23.5% | SEC ↗ |
Earnings: last 7 quarters
Frequently asked questions
How many SEC Form 4 insider filings does UMC have?
UNITED MICROELECTRONICS CORP (UMC) has 5 SEC Form 4 filings (7 transaction rows) in the rolling 365-day window, disclosed by 3 distinct insiders. Most recent filing: Sep 22, 2026.
When was the most recent SEC Form 4 filing for UMC?
The most recent Form 4 filing for UMC on Tracefour is dated Sep 22, 2026.
Who is the most active insider at UMC?
The most active SEC Form 4 filer at UMC in the rolling window is CFO & SVP Liu Chitung, with 3 filings.
What is the net insider flow at UMC over the last 6 months?
Over the trailing 180 days, insiders at UMC have net sold $526.4M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at UMC in the current window?
Inside the rolling window, insiders at UMC bought $0 and sold $526.4M based on SEC Form 4 filings.
Can I get alerts for UMC insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at UNITED MICROELECTRONICS CORP (UMC). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
UNITED MICROELECTRONICS CORP is in the Technology sector.