Insider Trading for UMC
View recent insider trading activity including purchases, sales, and awards. Insider trading can provide insights into how executives view their company's prospects.
Insider Trading Summary
Shares Acquired
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Shares Disposed
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Net Position
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Recent Activity (30 Days)
Acquisitions: 0 shares
Dispositions: 1.9M shares
Net: -1.9M shares
Insiders have been net sellers recently, which could indicate concerns about current valuation or short-term outlook.
Quarterly Activity (3 Months)
Acquisitions: 0 shares
Dispositions: 1.9M shares
Net: -1.9M shares
Insiders have been net sellers over the quarter, which institutional investors may view as a cautionary signal.
Key Insider Activity: Mar 18, 2026 to Jul 13, 2026
Liu Chitung
ExecutiveChief Financial Officer
-1.9M shares
4 transactions
HU CHE-JEN
ExecutivePresident
-10.0K shares
2 transactions
TAN WEN YI
ExecutivePresident
0 shares
1 transactions
LU CHIA-AO
ExecutivePresident
0 shares
1 transactions
LIAO CHING YU
ExecutiveVice President
0 shares
1 transactions
Transaction Details
| Date | Insider | Role | Transaction | Shares | Price | Value | Owned After | SEC Filing |
|---|---|---|---|---|---|---|---|---|
| Jul 13, 2026 | Liu Chitung | EChief Financial Officer | Sale | 1.9M | $154.89 | $294,291,000.00 | 3.3M | View |
| Jun 30, 2026 | HU CHE-JEN | EPresident | Sale | 10.0K | $171.30 | $1,713,000.00 | 3.2M | View |
| May 1, 2026 | TAN WEN YI | EPresident | Unknown | 0 | $0.00 | $0.00 | 650.6K | View |
May 1, 2026 | Locked | — | — | — | — | — | — | — |
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Apr 29, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
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Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Mar 18, 2026 | Locked | — | — | — | — | — | — | — |
Click "View" in the SEC Filing column to access the detailed SEC form submission for each transaction.
Executive Activity:
Executives have been net sellers of UMC stock, though this may be part of planned diversification.