Insider activity on UMC over the last 12 months.
Price & insider trades
Where insiders bought and sold against UMC's price — tap a bubble for the P&L since.
Graded signals
AI-scored insider events on UMC — tap any signal for the full read.
BEARISHUMC CFO Sells $294M — 36% of Direct Stake, First-Ever Filing, 16 Days Pre-Earnings4h ago
CFO Liu Chitung sold 1.9M shares at $154.89 for $294.3M, cutting 36.4% of directly held shares in a single transaction filed the same day it occurred, 16 days ahead of the July 29 earnings report. A CFO liquidating more than a third of directly held shares in one move — with no prior filing history on this ticker — is a high-conviction bearish signal; the timing just before earnings, when insiders are typically restricted, adds further weight to the urgency implied by this sale. Bull case: stock holds current levels through the July 29 earnings beat on the $1.01 consensus EPS and recovers; Bear case: any miss or guidance cut with this level of insider distribution already on record accelerates downside.
Where it could go — Our 7-8 conviction officer sells: 35% beat SPY at 30d (avg -6.8% vs SPY, n=108); bear breaks pre-earnings support.
BEARISHUMC VP Hu Che-Jen Sells $1.7M — First-Ever Filing, Minimal 0.3% Trim13d ago
Vice President Hu Che-Jen sold 10,000 shares at $171.30 for $1.7M, trimming directly held shares by 0.3% from 3,224,080 to 3,214,080 — a de minimis reduction of a very large position. With no cluster of other sellers, a mixed analyst consensus of 13 buy / 14 hold / 5 sell, and earnings 29 days out on July 29, this reads as routine portfolio management rather than a conviction-driven exit ahead of a negative catalyst. Bull case: stock holds current levels into the July 29 print with EPS consensus at $1.01 and beats; Bear case: a miss or guidance cut with insiders already trimming could pressure shares toward the 30-day low of $18.70.
Where it could go — Broad base rate 41.7% positive at 90d for similar sells; bull holds $171, bear breaks $18.70 support.
Recent insider trades
The open-market buys and sells filed on UMC.