United Microelectronics rises as revenue growth and silicon photonics progress lift sentiment

United Microelectronics (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 mix of improving near-term revenue trends and fresh enthusiasm around UMC’s silicon photonics manufacturing progress. Investors also seem to be rewarding signs that the company is gaining exposure to AI-related connectivity demand, which can support sentiment even before the next quarterly report.

Details:

UMC’s reported June 2026 net sales reached about NT$23.1 billion, up 22.85% from a year earlier, extending the company’s recent run of year-over-year monthly revenue gains.

In its last quarterly outlook, management said second-quarter wafer shipments were expected to rise by a high-single-digit percentage and average selling prices in U.S. dollars were expected to increase by a low-single-digit percentage.

UMC and SILITH announced the first mass-production wafer delivery of photonic integrated circuits from UMC’s Singapore fab, marking a tangible step in scaling silicon photonics for high-speed AI and hyperscale data-center interconnects.

UMC has been building a broader photonics roadmap, including prior work on a 12-inch silicon photonics platform aimed at next-generation connectivity, which could be reinforcing expectations for longer-term specialty growth.

Sources:

UMC, SEC, LEDinside

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 194 institutional investors add shares of $UMC stock to their portfolio, and 77 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

ACADIAN ASSET MANAGEMENT LLC added 5,826,613 shares (+253.6%) to their portfolio in Q1 2026, for an estimated $52,322,984
AQR CAPITAL MANAGEMENT LLC added 5,249,718 shares (+55.5%) to their portfolio in Q1 2026, for an estimated $47,142,467
QUBE RESEARCH & TECHNOLOGIES LTD added 4,838,763 shares (+1839.0%) to their portfolio in Q1 2026, for an estimated $43,452,091
MARSHALL WACE, LLP removed 4,533,912 shares (-95.7%) from their portfolio in Q1 2026, for an estimated $40,714,529
TWO SIGMA INVESTMENTS, LP added 3,980,009 shares (+70.1%) to their portfolio in Q1 2026, for an estimated $35,740,480
SCHRODER INVESTMENT MANAGEMENT GROUP removed 3,811,881 shares (-92.9%) from their portfolio in Q1 2026, for an estimated $34,230,691
UBS GROUP AG added 3,604,697 shares (+78.9%) to their portfolio in Q1 2026, for an estimated $32,370,179

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.