UMC jumps 5% as investors focus on stronger monthly sales and an active share buyback

By: Quiver PriceTracker

Posted: 1 day, 23 hours ago / May 19, 2026 5:36 p.m. UTC

UMC

United Microelectronics Corporation (UMC) is up 5.0% today. Here is some analysis on what might have caused this price movement.

Analysis: The move appears tied to a combination of improving near-term demand signals and capital-return support. UMC recently reported a notably stronger April sales print and has been executing a board-authorized share repurchase plan, which can amplify bullish sentiment when semiconductor stocks are already volatile.

Details:

UMC reported April 2026 net sales of NT$22.66 billion, up 10.8% year over year, with January–April 2026 sales up 6.88% year over year.

In its Q1 2026 update (released April 29, 2026), UMC highlighted continued traction in 22nm (14% of Q1 revenue) and guided for Q2 wafer shipments to rise by a high single-digit percentage with a low single-digit USD ASP increase.

UMC’s board authorized a share repurchase program (April 30 to June 29, 2026) for up to 50 million common shares within a defined price range, signaling a willingness to deploy cash toward equity support.

Separate disclosures in May 2026 showed ongoing buyback activity and cumulative repurchases, which can help underpin the stock during broader sector swings.

Sources:

UMC Investor Relations, SEC (EDGAR), Business Wire

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

$UMC Hedge Fund Activity

We have seen 200 institutional investors add shares of $UMC stock to their portfolio, and 100 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.