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Insider Trading

Last Updated: 6 days, 5 hours ago

Chitung Liu has an estimated net worth of at least $612.4 million*, as of Sept. 23, 2026. They own 3.6 million shares of UMC stock. They have sold 3.5 million shares of UMC stock since 2021, for an estimated $523.1 million.

Chitung Liu $UMC SEC Form 4 Insider Trading

Chitung Liu has filed a total of 3 insider trades in $UMC since 2021. Their most recent trade was a sale of 1.2 million shares, made on Sep 16, 2026. Their largest trade was a sale of 1.9 million shares, made on Jul 13, 2026. We estimate that they now own 3.6 million shares of $UMC, worth an estimated $89.3 million.



Insider Trading at $UMC

There have been a total of 5 insider trades reported at $UMC since 2021, with 0 shares purchased and 3.5 million shares sold. The most active insider traders in $UMC stock have been Chitung Liu, Che-Jen Hu, and Jen-Tsung Lin. The most recent trade was a sale of 10,000 shares reported by JEN-TSUNG LIN (Vice President), made on Sep 22, 2026.



History of Insider Stock Trades by Chitung Liu

Company Ticker Purchase / Sale Shares Date Disclosed (EST)
UMC logo UMC Sale 1.2 million Sep 16, 2026 Sept. 17, 2026, 7 a.m.
UMC logo UMC Sale 400,000 Sep 17, 2026 Sept. 17, 2026, 7 a.m.
UMC logo UMC Sale 1.9 million Jul 13, 2026 July 13, 2026, 6:04 a.m.




$UMC Executives and Stock Owners with Insider Trades



*This is only based off of information found in SEC filings, and may not reflect actual net worth. There may also be inaccuracies due to privately holdings filing errors, parsing errors, accidental double-counting of shares, incorrect classification of indirectly owned shares, sales prior to dataset start date, or any other number of issues.