UMC · United Microelectronics Corp · Insider Trading
Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 4 and 5. Form 3 supplies initial ownership rather than a trade; Form 4 must be filed within two business days of the trade.
Insider Sentiment Score
Peer-relative 0–100 rank of how aggressively insiders accumulated over the trailing 90 days. See the full ranking.
| Date | Insider | Role | Type | Security | Shares |
|---|---|---|---|---|---|
| 2026-09-22 | LIN JEN-TSUNG |
Vice President |
Sell↓
Filing footnotes — Commin Shares (Direct)
New Taiwan Dollars Includes 667,080 shares of Restricted Stock Award (RSA) and a specified number of shares subject to the RSA will vest annually on December 5 from 2026 to 2029. |
Commin Shares
|
10,000 |
| 2026-09-17 | Liu Chitung |
CFO & SVP |
Sell↓
Filing footnotes — Common Shares (Direct)
New Taiwan Dollars Includes 1,126,840 shares of Restricted Stock Award (RSA) and a specified number of shares subject to the RSA will vest annually on December 5 from 2026 to 2029. |
Common Shares
|
400,000 |
| 2026-09-16 | Liu Chitung |
CFO & SVP |
Sell↓
Filing footnotes — Common Shares (Direct)
New Taiwan Dollars Includes 1,126,840 shares of Restricted Stock Award (RSA) and a specified number of shares subject to the RSA will vest annually on December 5 from 2026 to 2029. |
Common Shares
|
1,200,000 |
| 2026-09-07 | Liu Chitung |
CFO & SVP |
Other↓
Filing footnotes — Common Shares (Indirect)
On September 7, 2026, the CTBC Bank Trust distributed 1,000,000 Common Shares of the Issuer to the Reporting Person due to the expiration and termination of the trust, resulting in a change in the form of the Reporting Person's ownership from indirect to direct. The shares are under Trust with Discretion Reserved. |
Common Shares
(I)
|
1,000,000 |
| 2026-09-07 | Liu Chitung |
CFO & SVP |
Other↑
Filing footnotes — Common Shares (Direct)
On September 7, 2026, the CTBC Bank Trust distributed 1,000,000 Common Shares of the Issuer to the Reporting Person due to the expiration and termination of the trust, resulting in a change in the form of the Reporting Person's ownership from indirect to direct. Includes 1,210,000 shares of Restricted Stock Award (RSA) and a specified number of shares subject to the RSA will vest annually on December 5 from 2026 to 2029. |
Common Shares
|
1,000,000 |
| 2026-07-13 | Liu Chitung |
CFO & SVP |
Sell↓
Filing footnotes — Common Shares (Direct)
New Taiwan Dollars Includes 1,210,000 shares of Restricted Stock Award (RSA) and a specified number of shares subject to the RSA will vest annually on December 5 from 2026 to 2029. |
Common Shares
|
1,900,000 |
| 2026-06-30 | HU CHE-JEN |
Vice President |
Sell↓
Filing footnotes — Common Shares (Direct)
New Taiwan Dollars Includes 828,800 shares of Restricted Stock Award (RSA) and a specified number of shares subject to the RSA will vest annually on December 5 from 2026 to 2029. |
Common Shares
|
10,000 |