UMC rises as AI-fueled semiconductor momentum and recent operating updates lift shares

United Microelectronics Corporation (UMC) is up 3.2% today. Here is some analysis on what might have caused this price movement.

Analysis: The move appears tied to a broader semiconductor rally in Taiwan after a major AI partnership announcement boosted sentiment across the chip supply chain. Investors also seem to be leaning on UMC’s own recent positives, including strong second-quarter results, a raised capital spending plan, and healthy monthly revenue growth.

Details:

Taiwan semiconductor stocks climbed on September 1, with UMC’s local shares gaining alongside a tech-led jump in the broader market after new AI-related collaboration news energized the sector.

UMC said in late July that second-quarter revenue rose 17.0% year over year to NT$68.73 billion, while operating income increased 32.6% sequentially.

The company said third-quarter utilization is expected to exceed 90%, suggesting demand remained solid heading into the current quarter.

UMC also approved a phased expansion plan in Singapore and Tainan and raised its 2026 capital expenditure budget to support future AI, edge computing, and silicon photonics demand; separately, July revenue increased 18.98% from a year earlier.

Sources:

UMC, NVIDIA Newsroom, Focus Taiwan

Disclaimer: This price movement analysis was generated with the help of AI. Please double-check the information provided for mistakes.

$UMC Insider Trading Activity

$UMC insiders have traded $UMC stock on the open market 2 times in the past 6 months. Of those trades, 0 have been purchases and 2 have been sales.

Here’s a breakdown of recent trading of $UMC stock by insiders over the last 6 months:

CHITUNG LIU (CFO & SVP) sold 1,900,000 shares for an estimated $294,291,000
CHE-JEN HU (Vice President) sold 10,000 shares for an estimated $1,713,000

To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.

$UMC Hedge Fund Activity

We have seen 222 institutional investors add shares of $UMC stock to their portfolio, and 155 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

BANK OF AMERICA CORP /DE/ added 7,577,990 shares (+291.1%) to their portfolio in Q2 2026, for an estimated $206,197,107
AQR CAPITAL MANAGEMENT LLC removed 6,995,905 shares (-47.5%) from their portfolio in Q2 2026, for an estimated $190,358,575
TWO SIGMA INVESTMENTS, LP removed 6,566,550 shares (-68.0%) from their portfolio in Q2 2026, for an estimated $178,675,825
GOLDMAN SACHS GROUP INC added 5,234,921 shares (+89.1%) to their portfolio in Q2 2026, for an estimated $142,442,200
QUBE RESEARCH & TECHNOLOGIES LTD removed 5,101,879 shares (-100.0%) from their portfolio in Q2 2026, for an estimated $138,822,127
BLACKROCK, INC. added 4,048,574 shares (+14.7%) to their portfolio in Q2 2026, for an estimated $110,161,698
NEUBERGER BERMAN GROUP LLC added 4,020,723 shares (+3524.9%) to their portfolio in Q2 2026, for an estimated $109,403,872

To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.

This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.