United Microelectronics Corp (UMC) insider trading.
In Q3 2026, insiders at United Microelectronics Corp reported 6 non-derivative transactions on 5 Forms 3, 4 and 5: 0 open-market purchases and 4 sales worth $524.7M.
- Transactions
- 6
- Purchases (P)
- 0
- Sales (S)
- 4
- Net shares, P minus S
- -3,510,000
- Insiders
- 2
- Last filed
- 2026-09-22
Insiders
| Insider | Relationship | Transactions | Buys | Sales |
|---|---|---|---|---|
| Liu Chitung | Officer · CFO & SVP | 5 | 0 | 3 |
| Lin Jen-Tsung | Officer · Vice President | 1 | 0 | 1 |
Transactions
| Date | Insider | Code | Shares | Price | Owned after | Filing |
|---|---|---|---|---|---|---|
| 2026-09-22 | Lin Jen-Tsung | S (D) | 10,000 | $163 | 1,172,140 | Form 4 |
| 2026-09-17 | Liu Chitung | S (D) | 400,000 | $145 | 2,639,757 | Form 4 |
| 2026-09-16 | Liu Chitung | S (D) | 1,200,000 | $142.33 | 3,039,757 | Form 4 |
| 2026-09-07 | Liu Chitung | J (D) | 1,000,000 | $0 | 1,000,000 | Form 4 |
| 2026-09-07 | Liu Chitung | J (A) | 1,000,000 | $0 | 4,322,917 | Form 4 |
| 2026-07-13 | Liu Chitung | S (D) | 1,900,000 | $154.89 | 3,322,917 | Form 4 |
Transaction codes in this quarter
Get UMC insider transactions through the API
curl "https://sec-api.dev/api/v1/insider-transactions?period=2026q3&cik=1033767&limit=100" \
-H "Authorization: Bearer $SEC_API_KEY"Insider trading API guide · UMC company page · United Microelectronics Corp on SEC.gov
Questions
Are insiders buying or selling United Microelectronics Corp (UMC)?
In Q3 2026, insiders at United Microelectronics Corp reported 6 non-derivative transactions on 5 Forms 3, 4 and 5: 0 open-market purchases and 4 sales worth $524.7M. Grants, tax withholding and option exercises are counted as transactions but are not purchases or sales.
Where do these United Microelectronics Corp insider trades come from?
From the SEC Insider Transactions Data Sets for Q3 2026, which republish the Forms 3, 4 and 5 filed on EDGAR. Each row links to its filing on SEC.gov.
Plain-text version for agents and LLMs: /insider-trading/umc.md
Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.