UMC vs AOSL Stock Comparison

United Microelectronics and Alpha & Omega Semiconductor Prices as of Oct 26, 2026 Peers: Industry group
UMC United Microelectronics Corp
$19.18 -21.1% 1M +154.4% 1Y
Market cap
$47.64B
P/E
18.1x
Revenue (TTM)
$13.76B
Div. yield
–
Semiconductor Manufacturing Technology
8 wins

Head to Head

9 decided of 12

United Microelectronics leads on 8 of the 12 questions below (United Microelectronics 8, Alpha & Omega Semiconductor 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionUMCAOSLLeader
Larger companyMarket capitalisation $47.64B $732.00M UMC
Cheaper on earningsLower P/E, profitable companies only 18.1x -17.4x –
Cheaper on forward earningsLower price / next fiscal year consensus EPS 17.4x — –
Faster revenue growthRevenue growth, trailing twelve months +85.6% -2.5% UMC
More profitableNet margin, trailing twelve months 19.1% -6.2% UMC
Better return on capitalReturn on invested capital 10.6% -5.4% UMC
Less leveragedLower net debt / EBITDA -0.9x -12.6x AOSL
Higher dividend yieldTrailing dividend yield 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months +154.4% -27.4% UMC
Better 5-year returnAnnualised price return, 5 years +12.1%/yr -7.6%/yr UMC
Less volatileAnnualised volatility, 1 year 64.5% 90.3% UMC
Higher overall scoreMean of the five percentile scores vs peers 72/100 32/100 UMC

Percentile Scorecard

UMCAOSL

Each axis is the mean percentile of its metrics against the company's industry group. 100 is the best in the group, 50 the middle.

Scores by Axis

AxisUMCAOSL
Valuation 82 #18 of 95 47 #51 of 95
Growth 58 #40 of 93 2 #91 of 93
Profitability 72 #26 of 91 24 #69 of 91
Financial Health 56 #45 of 101 63 #38 of 101
Shareholder Returns 91 #8 of 75 22 #59 of 75
Overall 72 32
  • UMC ranked among 104 companies in Semiconductors
  • AOSL ranked among 104 companies in Semiconductors

Price Performance

Price return, split-adjusted, before dividends. Click a name to hide or show it.

Returns

PeriodUMCAOSLSPY
1 month -21.1%-21.3% -0.8%
3 months +0.5%-28.7% +3.5%
6 months +64.1%-48.1% +7.0%
Year to date +144.0%+10.9% +12.2%
1 year +154.4%-27.4% +13.0%
3 years +171.3%-8.5% +86.3%
3 years, per year +39.5%-2.9% +23.1%
5 years +76.6%-32.5% +68.6%
5 years, per year +12.1%-7.6% +11.0%
10 years +948.1%+1.9% +258.0%
10 years, per year +26.5%+0.2% +13.6%

Risk

MeasureUMCAOSLSPY
Volatility, 1Y 64.5%90.3% 12.7%
Downside volatility, 1Y 56.8%98.1% 12.7%
Beta vs S&P 500, 1Y 1.793.44 1.00
Return / volatility, 1Y 2.39-0.30 1.02
Max drawdown, 5Y -57.3%-75.3% -25.4%
From 52-week high -31.5%-58.8% -1.8%
52-week high $28.01$53.32 $779.14
52-week low $7.02$17.47 $631.97

Valuation History

Weekly multiples on trailing twelve-month fundamentals. Negative or extreme readings (a loss year, a collapsed denominator) are left out so the chart stays readable.

MultipleUMCAOSL
P/E now vs peer median 17.8xmedian 42.1x -15.7xmedian 42.1x
P/S now vs peer median 3.5xmedian 7.1x 1.0xmedian 7.1x
EV/EBITDA now vs peer median 12.8xmedian 27.5x 34.7xmedian 27.5x
P/FCF now vs peer median 24.4xmedian 37.2x -9.8xmedian 37.2x
P/B now vs peer median 3.5xmedian 4.2x 0.8xmedian 4.2x
PEG now vs peer median 26.03median 2.23 0.21median 2.23

Financial History

Reported figures by fiscal period, placed on the calendar year (or quarter) each period ended in, so companies with different fiscal years line up.

Trailing twelve monthsUMCAOSL
Revenue $13.76B $678.93M
Gross profit $2.47B $151.54M
Operating income $1.60B -$43.20M
Net income $2.62B -$42.27M
Free cash flow $1.98B -$68.07M
R&D $609.13M $103.86M
EPS (diluted) $1.07 $-1.40
Cash & equivalents $3.91B $180.77M
Total debt $4.90B $18.90M
Shares (diluted) 2.47B 29.95M
Enterprise value $32.89B -$58.87M

All Metrics

58 metrics · best in bold

Bold marks the best reading: the lowest positive value for multiples, leverage and payout, the highest for everything else. The bar under each value is its percentile against that company's own peers. Hover a value for its rank and the peer median.

Valuation

12 metrics
MetricUMCAOSL
P/E 17.8x -15.7x
P/FCF 24.4x -9.8x
P/Operating cash flow 13.7x -40.7x
P/S 3.5x 1.0x
P/B 3.5x 0.8x
P/Tangible book 3.5x 0.8x
EV/EBITDA 12.8x 34.7x
EV/EBIT 28.3x -11.3x
EV/Revenue 3.3x 0.7x
EV/FCF 22.8x -7.2x
EV/Operating cash flow 12.8x -29.9x
PEG (3Y EPS CAGR) 26.03 0.21

Growth

14 metrics
MetricUMCAOSL
Revenue growth (1Y) 85.6% -2.5%
Revenue CAGR (3Y) 18.5% -0.6%
Gross profit growth (1Y) 11.3% -5.9%
Gross profit CAGR (3Y) -10.1% -8.8%
Operating income growth (1Y) 9.6% -51.9%
Operating income CAGR (3Y) -16.5% -57.6%
Net income growth (1Y) 104.8% 56.4%
Net income CAGR (3Y) -0.2% -75.6%
EPS growth (1Y) 116.8% -101.0%
EPS CAGR (3Y) 0.7% -74.9%
Operating cash flow growth (1Y) 17.5% -155.0%
Operating cash flow CAGR (3Y) -3.7% -40.9%
Free cash flow growth (1Y) 447.4% -806.2%
Free cash flow CAGR (3Y) -7.5% 8.9%

Profitability

14 metrics
MetricUMCAOSL
Gross margin 18.0% 22.3%
EBITDA margin 25.6% 2.1%
Operating margin 11.6% -6.4%
Pretax margin 30.3% -5.2%
Net margin 19.1% -6.2%
FCF margin 14.4% -10.0%
Operating cash flow margin 25.6% -2.4%
Return on equity 19.7% -5.3%
Return on assets 13.2% -4.3%
Return on invested capital 10.6% -5.4%
Return on capital employed 9.7% -5.1%
Asset turnover 0.7x 0.7x
Cash conversion (OCF / net income) 1.3x 0.4x
Stock comp / revenue 0.1% 3.9%

Financial Health

11 metrics
MetricUMCAOSL
Debt / assets 3.5% 0.4%
Debt / equity 0.1x 0.0x
Net debt / EBITDA -0.9x -12.6x
Debt / FCF 0.4x -0.1x
Liabilities / assets 33.3% 17.2%
Equity / assets 66.7% 82.8%
Interest coverage 30.3x -55.7x
Current ratio 2.2x 3.4x
Quick ratio 1.6x 1.8x
Cash ratio 1.2x 1.4x
Altman Z-score – 4.06

Shareholder Returns

7 metrics
MetricUMCAOSL
Dividend yield 2.1% –
Net buyback yield – -0.6%
Shareholder yield 2.1% -0.6%
Payout ratio (earnings) – –
Payout ratio (FCF) – –
Dividend growth (1Y) – –
Dividend CAGR (3Y) – –

Analyst Estimates

Solid lines are reported fiscal-year results; dashed lines are the consensus for the years ahead. Hover a year for the analysts' high and low, and how each result compared with its estimate.

ConsensusUMCAOSL
Forward P/E 17.4xFY2026 –
EPS, next fiscal year $1.10FY2026 $-0.59FY2027
EPS growth, next FY +107.5%FY2026 –
EPS growth, the year after -2.7% –
Revenue, next fiscal year $8.52BFY2026 $660.97MFY2027
Revenue growth, next FY +12.1%FY2026 -2.6%FY2027
Revenue growth, the year after +24.7% +9.5%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersUMCAOSL
Held by institutions 7.1% 75.5%
Institutions holding 362 217
Change in shares held, QoQ +3.2% +3.2%
Institutions buying 220 125
Institutions selling 109 65
Buyers to sellers 2.02 1.92

Return Correlation

Daily returns, last 12 months

1.00 means two stocks move in lockstep, 0 that they move independently. Pairs below about 0.5 diversify each other.

UMCAOSL
UMC 1.00 0.48
AOSL 0.48 1.00

Add a Peer

Largest companies in the same industry

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Frequently Asked Questions

Which is bigger, UMC and AOSL?

United Microelectronics (UMC) is the largest by market capitalisation: United Microelectronics (UMC) $47.64B, Alpha & Omega Semiconductor (AOSL) $732.00M.

Which company is growing faster?

United Microelectronics (UMC) grew revenue fastest over the trailing twelve months: United Microelectronics (UMC) +85.6%, Alpha & Omega Semiconductor (AOSL) -2.5%.

Which company is more profitable?

United Microelectronics (UMC) has the highest net margin (United Microelectronics (UMC) 19.1%, Alpha & Omega Semiconductor (AOSL) -6.2%). On return on invested capital, United Microelectronics (UMC) leads (United Microelectronics (UMC) 10.6%, Alpha & Omega Semiconductor (AOSL) -5.4%).

Which stock has performed better?

Over the past year United Microelectronics (UMC) returned the most: United Microelectronics (UMC) +154.4%, Alpha & Omega Semiconductor (AOSL) -27.4%. Over five years, United Microelectronics (UMC) compounded fastest (United Microelectronics (UMC) +12.1%/yr, Alpha & Omega Semiconductor (AOSL) -7.6%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, United Microelectronics (UMC) has been the steadiest (United Microelectronics (UMC) 64.5%, Alpha & Omega Semiconductor (AOSL) 90.3%). Volatility measures how widely the price swings, not the risk of the business.

Do UMC and AOSL move together?

Their daily returns over the past year have a correlation of 0.48, a moderate positive relationship. Holding both diversifies more than two closely linked stocks would.

Which is the better stock, UMC and AOSL?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, United Microelectronics (UMC) leads on 8. Business Quant does not give investment advice; use the comparison as a starting point for your own research.

Data from SEC filings, exchange prices and consensus estimates, via Business Quant. Percentile scores compare each company with its own peer group, so two companies' scores are each relative to different peers unless you rank against the whole market. Price returns exclude dividends. Nothing on this page is investment advice.