Chitung Liu sold $229M of UMC stock

Chitung Liu, CFO & SVP of United Microelectronics Corp (UMC), sold 1,600,000 shares of UMC stock worth $229M, per an SEC Form 4 filed Sep 17, 2026.

It was an open-market sale.

The trade happened on Sep 16, 2026, 1 day before it was made public.

UMC has moved -31.6% since the trade date, from $22.53 to $15.40 (Nov 13, 2026 close).