Are insiders buying UMC?

This page tracks SEC Form 4 open-market insider purchases for UMC. We surface a cluster when 2 or more distinct insiders buy within 90 days.

What is an insider cluster buy?

A cluster buy is when two or more distinct company insiders make open-market purchases (SEC Form 4, transaction code P) of the same stock within a short window. Multiple insiders buying at once is a stronger conviction signal than a single purchase.

Where does InsiderCluster get insider data?

Directly from SEC EDGAR Form 4 filings. We track open-market purchases (code P); price and sentiment come from Yahoo Finance and StockTwits.

UMC

NYSE

United Microelectronics Corporation

$24.08

▲ 2.32 (+10.66%)

Price

+3.37% over 1D

Key statistics

Previous close$21.76

Day range23.12 – 24.17

52-week range6.56 – 24.17

Volume26.08M

CurrencyUSD

ExchangeNYSE

Crowd sentiment

100Bullish

Insider activity

SEC EDGAR ↗

No recent Form 4 insider transactions found.

Social sentiment

100

Bullish

Volume-weighted across live social sources

StockTwitsLIVE

18 bull1000 bear

Recent posts

@manojaggarwal· StockTwits8h ago

$UMC still holding all 500 shares

@topstockalerts· StockTwits8h ago

$UMC this strength feels real… not just a quick pop

@MorganHoratio· StockTwits10h ago

All these stocks hit new 52 WEEK HIGHS at some point today $BNY $IBKR $UMC $NVT $TD Today's 52-week high list represents a flawless liquidity wave, with smart money clustering into AI electrical infrastructure, global broker expansion, and lagging foundry pricing power. Liquid cooling and electrical hardware sovereign $NVT (nVent) continues its powerful right-side run, driven by intense data-center grid spend. Concurrently, online brokerage vanguard $IBKR scales record highs as explosive trading volumes compound, while trust bank titan $BNY prints fresh momentum post-ticker transition. Wafer-fab giant $UMC (United Microelectronics) executed a clean technical breakout following high-conviction guidance to adjust wafer prices upward in late 2026 to defend its margins. As the rally spreads beyond core AI logic chips, where are you chasing the premium alpha?

@Jblack500· StockTwits12h ago

@WAJeff @cynicaloptimist @MaverikIT @BustaCapital @IsabellaDC @No_Face_character $UMC new atch

@Hdawg1YOLO· StockTwits12h ago

🚨 NEXT DAY WATCHLIST SCANNER Join: https://bullish-signals.replit.app $KMX Score: 9.5/10 - Why:** Massive 13.14% gain on strong relative volume. Institutional favorite with high volume expansion. - Key Technical:** Broke out of a multi-week range; bullish Marubozu candle; volume >3x average. $WYFI Score: 9/10 - Why:** Explosive 14.83% gain, price at all-time highs, and exceptional relative volume. - **Key Technical:** New highs, minimal overhead supply, high closing range. $SLDB Score: 8.8/10 - Why: 13.95% surge, high momentum biotech, consistent volume spikes. - Key Technical: Cleared daily resistance; 2.5x relative volume. $UMC Score: 8.7/10 - Why: 10.66% jump, semiconductor strength, high liquidity/volume surge. - **Key Technical:** Multi-month trend breakout, strong close in upper range. $CIFR | BULLISH Score: 8.6/10 - Why: 10.74% gain, crypto-related, sector strength, huge volume. - Key Technical: Cup & handle breakout above resistance, strong relative strength.

@PatienceMakesWealth· StockTwits14h ago

$UMC let's go! My shares are still being shorted!!!!!!!!!!!!!!!!!!!!

@PatienceMakesWealth· StockTwits14h ago

$UMC

@KornieAwareness7· StockTwits14h ago

$UMC darn missed this just took off after March reset!

@MaoZedong· StockTwits17h ago

$UMC $INTC run

@JuliusW· StockTwits19h ago

$UMC rolling stock

@Bear_Police· StockTwits19h ago

$UMC Mark it! 😁