United Microelectronics Corporation (UMC) Insider Trading
Over the last 3 months, UMC insiders made 0 open-market buys and 2 sales, a net sale of -$296.0M (SEC Form 4). Over the last 6 months, 276 institutions increased and 173 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
2
Net (3m)
-$296.0M
Insider trades by month Buys Sells
Jun
Jul
Context3-month price -7%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jul 13, 2026 | Liu Chitungofficer: CFO & SVP | Sell | 1,900,000 | $154.89 |
| Jun 30, 2026 | HU CHE-JENofficer: Vice President | Sell | 10,000 | $171.30 |
Source: UMC SEC Form 4 filings, latest Jul 13, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their UMC positions over the last 6 months (SEC Form 13F).
Increased
276
New positions
169
Reduced
173
Sold out
38
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| BlackRock, Inc. | Increased | 31.5M | Aug 7, 2026 |
| BLACKROCK, INC. | Increased | 27.5M | May 13, 2026 |
| AQR CAPITAL MANAGEMENT LLC | Increased | 14.7M | May 15, 2026 |
| UBS Group AG | Increased | 11.8M | Aug 13, 2026 |
| GOLDMAN SACHS GROUP INC | Increased | 11.1M | Aug 14, 2026 |
| BANK OF AMERICA CORP /DE/ | Increased | 10.2M | Aug 14, 2026 |
| TWO SIGMA INVESTMENTS, LP | Increased | 9.7M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 9.0M | May 15, 2026 |
| MORGAN STANLEY | Reduced | 8.8M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 8.6M | Aug 13, 2026 |
| UBS GROUP AG | Increased | 8.5M | May 5, 2026 |
| MORGAN STANLEY | Reduced | 8.3M | Aug 13, 2026 |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 8.1M | May 13, 2026 |
| AQR CAPITAL MANAGEMENT LLC | Reduced | 7.7M | Aug 14, 2026 |
| Rafferty Asset Management, LLC | Increased | 7.7M | Aug 14, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.