United Microelectronics Corp. ADR (UMC) Insider Trading

Last 12 months

Insiders sold $526M and bought nothing on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. CFO & SVP Chitung Liu sold $294M on Jul 13, 26% of their stake, outside a plan. No executive or director has bought shares on the open market in the last two years.

Net open-market

−$526M

0 buys · 4 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

0 / 3

executives and directors

Last open-market buy

None

in the last two years

Get an email when UMC's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Sep 22	Jen-Tsung Lin Vice President	SoldNo plan	10,000	$163.00	$1.63M	0.8%	Form 4
Sep 16 – 17	Chitung Liu CFO & SVP	SoldNo plan 2 parts	1,600,000	$143.00 average	$229M	30%	Form 4
Jul 13	Chitung Liu CFO & SVP	SoldNo plan	1,900,000	$154.89	$294M	26%	Form 4
Jun 30	Che-Jen Hu Vice President	SoldNo plan	10,000	$171.30	$1.71M	0.3%	Form 4

Sep 22No plan
Jen-Tsung Lin
Vice President · sold 10,000 at $163.00
$1.63M
0.8% of stake
Sep 16 – 17No plan
Chitung Liu
CFO & SVP · sold 1,600,000 at avg $143.00
$229M
30% of stake
Jul 13No plan
Chitung Liu
CFO & SVP · sold 1,900,000 at $154.89
$294M
26% of stake
Jun 30No plan
Che-Jen Hu
Vice President · sold 10,000 at $171.30
$1.71M
0.3% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch UMC, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Data sourced from company filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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