Market Cap
$61.7B
UMC
UNITED MICROELECTRONICS CORP
$26.27 ▲ +4.20%
Prev close $25.21Market cap$61.7B
12-mo target$18.49 (-29.6%)
Insider Selling Cluster (2 insiders)31 New Institutional Positions19 Institutional Exits Semiconductors
Snapshot
The big-picture read on UMC right now — valuation, ownership and activity at a glance.
Cap Size
Large Cap
Inst. Holders
50 funds
Inst. Value
$4.6B
Inst. Activity
31 buys / 19 sells
Insider Activity
$0.00 buy / $526.4M sell
Insider Net $
-$526.4M
Social Sentiment
80° Bullish
SEC Reports
20
Price chart 30d +32.3%
Daily candles (open–high–low–close) with volume. Green = up day, red = down day.
No data for this timeframe.
Vol
Recent activity
The latest filings, insider trades, analyst actions, press and options flow — newest first.
Oct 1, 2026 short_volume
Short Volume: UMC — 60.5% short (1.1M / 1.9M)
Short: 1,136,777 | Exempt: 2,757 | TRF Vol: 1,878,832 | Short Ratio: 60.5% | Off-exchange volume (da
Sep 22, 2026 Insider
LIN JEN-TSUNG sold 10,000 shares
Vice President @ $163.00 ($1.6M)
Sep 17, 2026 Insider
Liu Chitung sold 400,000 shares
CFO & SVP @ $145.00 ($58.0M)
Sep 16, 2026 Insider
Sep 4, 2026 SEC Liu Chitung sold 1,200,000 shares
CFO & SVP @ $142.33 ($170.8M)
UMC reported August 2026 net sales of NT$25.04B, up 30.71% YoY, and YTD sales up 14.66% YoY. The strong monthly revenue
6-K — Impact 5/10
UMC filed a 6-K announcing that the proceeds from its 2nd domestic unsecured convertible corporate bond issuance have be
6-K — Impact 2/10
UMC's board has authorized the issuance of up to $1.8 billion in zero-coupon unsecured overseas convertible bonds (Tranc
6-K — Impact 5/10
Jun 30, 2026 Inst.
UBS Group AG — ADD
11,632,967 shares ($316.5M)
Analyst ratings buy % +79.4%
How Wall Street rates the stock today, and the latest firm-by-firm actions.
Recent analyst actions
| Date | Firm | Action | Rating | Firm rating |
|---|---|---|---|---|
| Jan 21, 2025 | Citigroup | DOWNGRADE | Sell | 55% |
| Oct 30, 2024 | JP Morgan | DOWNGRADE | Neutral | 55% |
| Oct 28, 2024 | Morgan Stanley | DOWNGRADE | Equal-Weight | 55% |
| Oct 17, 2024 | Goldman Sachs | DOWNGRADE | Neutral | 54% |
| Apr 24, 2024 | Citigroup | UPGRADE | Buy | 55% |
| Jan 16, 2024 | Goldman Sachs | DOWNGRADE | Neutral | 54% |
| Oct 26, 2023 | Goldman Sachs | MAINTAIN | Buy | 54% |
| Jun 8, 2021 | Bernstein | DOWNGRADE | Underperform | 51% |
| Feb 5, 2020 | China Renaissance | UPGRADE | Buy | 56% |
| Nov 25, 2019 | Citigroup | UPGRADE | Neutral | 55% |
Monthly consensus history
| Period | Str. Buy | Buy | Hold | Sell | Str. Sell | Buy % | Distribution |
|---|---|---|---|---|---|---|---|
| Sep 1, 2026 | 6 | 14 | 9 | 3 | 1 | 61% | |
| Aug 1, 2026 | 5 | 14 | 10 | 3 | 1 | 58% | |
| Jul 1, 2026 | 4 | 10 | 14 | 3 | 1 | 44% | |
| Jun 1, 2026 | 4 | 9 | 14 | 4 | 1 | 41% | |
| May 1, 2026 | 4 | 6 | 18 | 3 | 1 | 31% | |
| Apr 1, 2026 | 1 | 3 | 17 | 10 | 3 | 12% | |
| Mar 1, 2026 | 1 | 3 | 17 | 10 | 3 | 12% | |
| Feb 1, 2026 | 1 | 4 | 15 | 11 | 3 | 15% |
Price targets
Where 4 covering analysts think UMC trades over the next 12 months.
$18.49 -29.6% upside Strong Sell
Current$26.27 Low$10.80 Median$14.70 High$33.76 4 analysts
$10.80$33.76
Analyst rating None as of Oct 2, 2026
Social media sentiment mood +0.0%
Retail-investor mood aggregated across social media. 0° = very bearish, 100° = very bullish.
80°
Bullish
BearishNeutralBullish
Recent posts
I MUST be a moron...but I am buying the dip. HOW wrong am I?
▲ 1 · 💬 7· ⚡ 0.5
Smoltek Nanotech Holding (OTC: SMLTF) – DD on a Swedish Deep-Tech Microcap Entering Commercialization
▲ 1 · 💬 1· ⚡ 0.5
Intel UMC 12nm (satellite systems) + SpaceX
▲ 1 · 💬 0· ⚡ 0.5
$SVCO one for your watchlist, insane partnerships and micron has a stake
▲ 1 · 💬 0· ⚡ 0.5
Up 250k in the last month from 17k initial… INTC AMD 90% of what I played.
▲ 1 · 💬 1· ⚡ 0.5
Reports & filings
AI-scored summaries of recent SEC filings and press releases, with sentiment and impact.
20 SEC filing reports analyzed · 3 bullish, 2 bearish, 0 mixed, 15 neutral · avg impact 3.1/10.
BULLISH6-K5/10
UMC reported August 2026 net sales of NT$25.04B, up 30.71% YoY, and YTD sales up 14.66% YoY. The str
Sep 4, 2026
NEUTRAL6-K2/10
UMC filed a 6-K announcing that the proceeds from its 2nd domestic unsecured convertible corporate b
Sep 2, 2026
BEARISH6-K5/10
UMC's board has authorized the issuance of up to $1.8 billion in zero-coupon unsecured overseas conv
Aug 26, 2026
BEARISH6-K5/10
UMC's 6-K reports three items: a minor capital reduction (0.055% of shares) from RSA cancellation, t
Aug 14, 2026
Upcoming & catalyst events
Scheduled dates plus disclosed catalysts — earnings, dividends, enforcement, FDA and clinical-trial events. Colored dot = impact.
Oct 1, 2026
short_volume
Short Volume: UMC — 60.5% short (1.1M / 1.9M)
Short: 1,136,777 | Exempt: 2,757 | TRF Vol: 1,878,832 | Short Ratio: 60.5% | Off-exchange volume (dark pool + OTC)
Sep 30, 2026
short_volume
Short Volume: UMC — 57.5% short (1.0M / 1.8M)
Short: 1,022,968 | Exempt: 1,133 | TRF Vol: 1,779,043 | Short Ratio: 57.5% | Off-exchange volume (dark pool + OTC)
Sep 29, 2026
short_volume
Short Volume: UMC — 65.8% short (1.8M / 2.8M)
Short: 1,843,316 | Exempt: 3,676 | TRF Vol: 2,799,523 | Short Ratio: 65.8% | Off-exchange volume (dark pool + OTC)
Sep 25, 2026
short_volume
Short Volume: UMC — 65.4% short (1.0M / 1.5M)
Short: 1,004,785 | Exempt: 0 | TRF Vol: 1,537,497 | Short Ratio: 65.4% | Off-exchange volume (dark pool + OTC)
Sep 23, 2026
short_volume
Short Volume: UMC — 60.0% short (2.1M / 3.4M)
Short: 2,054,859 | Exempt: 51 | TRF Vol: 3,422,975 | Short Ratio: 60.0% | Off-exchange volume (dark pool + OTC)
Earnings estimates
Forecast earnings per share and revenue by period — and whether estimates are rising.
| Period | EPS Est. | Range | Growth | 30d Rev | Up/Dn | Revenue | # |
|---|---|---|---|---|---|---|---|
| Current Q | $0.12 | $0.03–$0.21 | -36.9% | -27.6% | 1↑ 0↓ | $75.7B | 2 |
| Next Q | $0.12 | $0.04–$0.20 | -6.9% | -25.5% | 1↑ 0↓ | $78.5B | 2 |
| Current FY | $0.92 | $0.70–$1.14 | 72.6% | +32.7% | 1↑ 0↓ | $282.6B | 2 |
| Next FY | $0.88 | $0.82–$0.93 | -4.4% | +7.7% | 1↑ 0↓ | $344.9B | 2 |
Current-quarter EPS estimate — revision history
| When | EPS estimate | Change vs now |
|---|---|---|
| Current | $0.123 | — |
| 7d ago | $0.168 | -0.045 |
| 30d ago | $0.170 | -0.047 |
| 60d ago | $0.170 | -0.047 |
| 90d ago | $0.170 | -0.047 |
Institutional ownership
Which big funds own UMC (from quarterly 13F filings) and who is adding or trimming.
50 institutional holders with $4.6B total value (167,758,869 shares) as of 2026-Q2. Top holders: Erste, BlackRock,, UBS. Net buying activity: 31 institutions added/increased vs 19 reduced.
Top holders — 2026-Q2
| Fund | Shares | Value | % Tracked | Last move |
|---|---|---|---|---|
| Erste Asset Management GmbH | 0 | $0.00 | 0.0% | — |
| BlackRock, Inc. | 31,544,454 | $858.3M | 18.8% | — |
| UBS Group AG | 11,632,967 | $316.5M | 6.9% | ADD +42.3% |
| GOLDMAN SACHS GROUP INC | 11,109,785 | $302.3M | 6.6% | ADD +89.1% |
| BANK OF AMERICA CORP /DE/ | 10,181,208 | $277.0M | 6.1% | DOUBLED +291.1% |
| VANGUARD CAPITAL MANAGEMENT LLC | 8,601,967 | $234.1M | 5.1% | — |
| MORGAN STANLEY | 8,285,573 | $225.5M | 4.9% | — |
| AQR CAPITAL MANAGEMENT LLC | 7,718,125 | $210.0M | 4.6% | — |
| Rafferty Asset Management, LLC | 7,653,378 | $208.2M | 4.6% | ADD +53.6% |
| Man Group plc | 5,593,427 | $152.2M | 3.3% | — |
Recent position changes
| Fund | Action | Prev | Current | Change | Value |
|---|---|---|---|---|---|
| UBS Group AG | ADD | 8,175,144 | 11,632,967 | +42.3% | $316.5M |
| GOLDMAN SACHS GROUP INC | ADD | 5,874,864 | 11,109,785 | +89.1% | $302.3M |
| BANK OF AMERICA CORP /DE/ | DOUBLED | 2,603,218 | 10,181,208 | +291.1% | $277.0M |
| Rafferty Asset Management, LLC | ADD | 4,983,653 | 7,653,378 | +53.6% | $208.2M |
| CITIGROUP INC | ADD | 4,296,722 | 5,414,362 | +26.0% | $147.3M |
| Neuberger Berman Group LLC | DOUBLED | 114,065 | 4,134,788 | +3524.9% | $111.0M |
| JPMORGAN CHASE & CO | DOUBLED | 260,704 | 3,660,899 | +1304.2% | $98.3M |
| Tidal Investments LLC | ADD | 1,596,151 | 2,355,267 | +47.6% | $64.1M |
| Empowered Funds, LLC | NEW | — | 1,891,076 | — | $51.5M |
| Connor, Clark & Lunn Investment Management Ltd. | ADD | 710,083 | 1,342,996 | +89.1% | $36.5M |
Insider activity
Buying and selling by company executives and directors (SEC Form 4).
3 insiders, 6 transactions. Net -$526.4M — $0.00 bought, $526.4M sold.
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 22, 2026 | LIN JEN-TSUNG | Vice President | SELL | 10,000 | $163.00 | $1.6M |
| Sep 17, 2026 | Liu Chitung | CFO & SVP | SELL | 400,000 | $145.00 | $58.0M |
| Sep 16, 2026 | Liu Chitung | CFO & SVP | SELL | 1,200,000 | $142.33 | $170.8M |
| Sep 7, 2026 | Liu Chitung | CFO & SVP | J | 1,000,000 | — | — |
| Jul 13, 2026 | Liu Chitung | CFO & SVP | SELL | 1,900,000 | $154.89 | $294.3M |
| Jun 30, 2026 | HU CHE-JEN | Vice President | SELL | 10,000 | $171.30 | $1.7M |
Short interest & halts
FINRA semi-monthly short positions, Reg SHO threshold status, and recent trading halts for UMC.
Shares short
38,400,261
Settlement Sep 15, 2026
Change vs prior
+14.1%
Semi-monthly cycle
Days to cover
3.6
At avg daily volume
Of shares outstanding
≈1.5%
Estimate — not % of float
All UMC filing & press-release reports (25)
- 6-K reportSep 4, 2026
- 6-K reportSep 2, 2026
- 6-K reportAug 26, 2026
- 6-K reportAug 14, 2026
- 6-K reportAug 5, 2026
- 6-K reportJul 21, 2026
- 6-K reportJul 15, 2026
- 6-K reportJul 14, 2026
- 6-K reportJul 6, 2026
- 6-K reportJul 3, 2026
- 6-K reportJun 29, 2026
- 6-K reportJun 23, 2026
- 6-K reportJun 18, 2026
- 6-K reportJun 16, 2026
- 6-K reportJun 5, 2026
- 6-K reportJun 3, 2026
- 6-K reportMay 27, 2026
- 6-K reportMay 15, 2026
- 6-K reportMay 13, 2026
- 6-K reportMay 12, 2026
- 6-K reportMay 8, 2026
- 6-K reportMay 7, 2026
- 6-K reportApr 21, 2026
- 6-K reportApr 15, 2026
- 6-K reportApr 8, 2026