AMBA vs ARM vs UMC Stock Comparison

Ambarella, Arm Holdings and United Microelectronics Prices as of Oct 26, 2026 Peers: Industry group
AMBA Ambarella Inc
$66.82 -8.1% 1M -22.0% 1Y
Market cap
$2.96B
P/E
–
Revenue (TTM)
$417.80M
Div. yield
–
Semiconductor Design Technology
ARM Arm Holdings Plc /Uk
$223.35 -28.0% 1M +30.9% 1Y
Market cap
$240.51B
P/E
230.4x
Revenue (TTM)
$5.16B
Div. yield
–
Semiconductor Design Technology
2 wins
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
7 wins

Head to Head

9 decided of 12

United Microelectronics leads on 7 of the 12 questions below (United Microelectronics 7, Arm Holdings 2). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionAMBAARMUMCLeader
Larger companyMarket capitalisation $2.96B $240.51B $47.64B ARM
Cheaper on earningsLower P/E, profitable companies only -52.5x 230.4x 18.1x UMC
Cheaper on forward earningsLower price / next fiscal year consensus EPS 86.8x 107.9x 17.4x UMC
Faster revenue growthRevenue growth, trailing twelve months +20.0% +25.1% +85.6% UMC
More profitableNet margin, trailing twelve months -13.5% 20.2% 19.1% ARM
Better return on capitalReturn on invested capital — — 10.6% –
Less leveragedLower net debt / EBITDA — — -0.9x –
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months -22.0% +30.9% +154.4% UMC
Better 5-year returnAnnualised price return, 5 years -18.1%/yr — +12.1%/yr UMC
Less volatileAnnualised volatility, 1 year 74.6% 79.0% 64.5% UMC
Higher overall scoreMean of the five percentile scores vs peers 40/100 62/100 72/100 UMC

Percentile Scorecard

AMBAARMUMC

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

AxisAMBAARMUMC
Valuation 31 #66 of 95 7 #88 of 95 82 #18 of 95
Growth 55 #42 of 93 88 #12 of 93 58 #40 of 93
Profitability 26 #68 of 91 77 #22 of 91 72 #26 of 91
Financial Health 59 #42 of 101 77 #24 of 101 56 #45 of 101
Shareholder Returns 31 #52 of 75 – 91 #8 of 75
Overall 40 62 72
  • AMBA ranked among 104 companies in Semiconductors
  • ARM ranked among 104 companies in Semiconductors
  • UMC ranked among 104 companies in Semiconductors

Price Performance

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

Returns

PeriodAMBAARMUMCSPY
1 month -8.1%-28.0%-21.1% -0.8%
3 months -2.1%-16.1%+0.5% +3.5%
6 months +3.0%+3.5%+64.1% +7.0%
Year to date -5.7%+104.3%+144.0% +12.2%
1 year -22.0%+30.9%+154.4% +13.0%
3 years +42.8%+355.0%+171.3% +86.3%
3 years, per year +12.6%+65.8%+39.5% +23.1%
5 years -63.2%—+76.6% +68.6%
5 years, per year -18.1%—+12.1% +11.0%
10 years +6.9%—+948.1% +258.0%
10 years, per year +0.7%—+26.5% +13.6%

Risk

MeasureAMBAARMUMCSPY
Volatility, 1Y 74.6%79.0%64.5% 12.7%
Downside volatility, 1Y 79.6%71.2%56.8% 12.7%
Beta vs S&P 500, 1Y 2.613.471.79 1.00
Return / volatility, 1Y -0.290.392.39 1.02
Max drawdown, 5Y -81.7%-54.0%-57.3% -25.4%
From 52-week high -30.0%-49.2%-31.5% -1.8%
52-week high $95.51$439.46$28.01 $779.14
52-week low $48.65$104.55$7.02 $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.

MultipleAMBAARMUMC
P/E now vs peer median -52.2xmedian 42.1x 227.0xmedian 42.1x 17.8xmedian 42.1x
P/S now vs peer median 7.1xmedian 7.1x 46.0xmedian 7.1x 3.5xmedian 7.1x
EV/EBITDA now vs peer median -72.0xmedian 27.5x 201.3xmedian 27.5x 12.8xmedian 27.5x
P/FCF now vs peer median 303.4xmedian 37.2x 117.8xmedian 37.2x 24.4xmedian 37.2x
P/B now vs peer median 4.8xmedian 4.2x 27.5xmedian 4.2x 3.5xmedian 4.2x
PEG now vs peer median -2.66median 2.23 6.40median 2.23 26.03median 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 monthsAMBAARMUMC
Revenue $417.80M $5.16B $13.76B
Gross profit $244.50M $5.03B $2.47B
Operating income -$62.24M $877.00M $1.60B
Net income -$56.32M $1.04B $2.62B
Free cash flow $9.72M $2.01B $1.98B
R&D $228.69M $2.96B $609.13M
EPS (diluted) $-1.28 $0.98 $1.07
Cash & equivalents $101.85M $3.06B $3.91B
Total debt – – $4.90B
Shares (diluted) 44.01M 1.07B 2.47B
Enterprise value $1.80B $226.22B $32.89B

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
MetricAMBAARMUMC
P/E -52.2x 227.0x 17.8x
P/FCF 303.4x 117.8x 24.4x
P/Operating cash flow 107.9x 113.2x 13.7x
P/S 7.1x 46.0x 3.5x
P/B 4.8x 27.5x 3.5x
P/Tangible book 5.2x 28.2x 3.5x
EV/EBITDA -72.0x 201.3x 12.8x
EV/EBIT -43.0x 265.8x 28.3x
EV/Revenue 6.4x 45.2x 3.3x
EV/FCF 275.4x 115.8x 22.8x
EV/Operating cash flow 98.0x 111.3x 12.8x
PEG (3Y EPS CAGR) -2.66 6.40 26.03

Growth

14 metrics
MetricAMBAARMUMC
Revenue growth (1Y) 20.0% 25.1% 85.6%
Revenue CAGR (3Y) 12.9% 24.7% 18.5%
Gross profit growth (1Y) 17.4% 25.6% 11.3%
Gross profit CAGR (3Y) 11.3% 25.4% -10.1%
Operating income growth (1Y) 36.9% 14.9% 9.6%
Operating income CAGR (3Y) 18.4% 21.6% -16.5%
Net income growth (1Y) 36.4% 49.4% 104.8%
Net income CAGR (3Y) 16.9% 37.2% -0.2%
EPS growth (1Y) 38.6% 48.7% 116.8%
EPS CAGR (3Y) 19.6% 35.5% 0.7%
Operating cash flow growth (1Y) -47.8% 105.5% 17.5%
Operating cash flow CAGR (3Y) 1.3% 34.7% -3.7%
Free cash flow growth (1Y) -73.7% 121.8% 447.4%
Free cash flow CAGR (3Y) -5.8% 33.3% -7.5%

Profitability

14 metrics
MetricAMBAARMUMC
Gross margin 58.5% 97.5% 18.0%
EBITDA margin -8.9% 22.5% 25.6%
Operating margin -14.9% 17.0% 11.6%
Pretax margin -12.9% 24.5% 30.3%
Net margin -13.5% 20.2% 19.1%
FCF margin 2.3% 39.0% 14.4%
Operating cash flow margin 6.5% 40.6% 25.6%
Return on equity -9.2% 16.3% 19.7%
Return on assets -7.2% 12.6% 13.2%
Return on invested capital – – 10.6%
Return on capital employed -9.6% 9.0% 9.7%
Asset turnover 0.5x 0.5x 0.7x
Cash conversion (OCF / net income) -0.5x 2.0x 1.3x
Stock comp / revenue 21.9% 22.4% 0.1%

Financial Health

11 metrics
MetricAMBAARMUMC
Debt / assets – – 3.5%
Debt / equity – – 0.1x
Net debt / EBITDA – – -0.9x
Debt / FCF – – 0.4x
Liabilities / assets 20.5% 22.9% 33.3%
Equity / assets 79.5% 77.1% 66.7%
Interest coverage – – 30.3x
Current ratio 2.8x 5.3x 2.2x
Quick ratio 2.2x 4.9x 1.6x
Cash ratio 2.0x 3.2x 1.2x
Altman Z-score 11.10 57.27 –

Shareholder Returns

7 metrics
MetricAMBAARMUMC
Dividend yield – – 2.1%
Net buyback yield -0.1% – –
Shareholder yield -0.1% – 2.1%
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.

ConsensusAMBAARMUMC
Forward P/E 86.8xFY2026 107.9xFY2026 17.4xFY2026
EPS, next fiscal year $0.77FY2026 $2.07FY2026 $1.10FY2026
EPS growth, next FY +24.2%FY2026 +16.9%FY2026 +107.5%FY2026
EPS growth, the year after +40.3% +49.8% -2.7%
Revenue, next fiscal year $454.23MFY2026 $5.71BFY2026 $8.52BFY2026
Revenue growth, next FY +16.3%FY2026 +16.0%FY2026 +12.1%FY2026
Revenue growth, the year after +3.4% +38.7% +24.7%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersAMBAARMUMC
Held by institutions 81.7% 9.3% 7.1%
Institutions holding 337 955 362
Change in shares held, QoQ -1.5% +12.4% +3.2%
Institutions buying 203 593 220
Institutions selling 89 257 109
Buyers to sellers 2.28 2.31 2.02

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.

AMBAARMUMC
AMBA 1.00 0.41 0.29
ARM 0.41 1.00 0.46
UMC 0.29 0.46 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, AMBA, ARM and UMC?

Arm Holdings (ARM) is the largest by market capitalisation: Ambarella (AMBA) $2.96B, Arm Holdings (ARM) $240.51B, United Microelectronics (UMC) $47.64B.

Which stock is cheaper, AMBA, ARM and UMC?

United Microelectronics (UMC) trades on the lowest price-to-earnings ratio (Ambarella (AMBA) -52.5x, Arm Holdings (ARM) 230.4x, United Microelectronics (UMC) 18.1x). On next year's consensus earnings, United Microelectronics (UMC) is cheapest (Ambarella (AMBA) 86.8x, Arm Holdings (ARM) 107.9x, United Microelectronics (UMC) 17.4x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

United Microelectronics (UMC) grew revenue fastest over the trailing twelve months: Ambarella (AMBA) +20.0%, Arm Holdings (ARM) +25.1%, United Microelectronics (UMC) +85.6%.

Which company is more profitable?

Arm Holdings (ARM) has the highest net margin (Ambarella (AMBA) -13.5%, Arm Holdings (ARM) 20.2%, United Microelectronics (UMC) 19.1%).

Which stock has performed better?

Over the past year United Microelectronics (UMC) returned the most: Ambarella (AMBA) -22.0%, Arm Holdings (ARM) +30.9%, United Microelectronics (UMC) +154.4%. Over five years, United Microelectronics (UMC) compounded fastest (Ambarella (AMBA) -18.1%/yr, United Microelectronics (UMC) +12.1%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, United Microelectronics (UMC) has been the steadiest (Ambarella (AMBA) 74.6%, Arm Holdings (ARM) 79.0%, United Microelectronics (UMC) 64.5%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, AMBA, ARM and UMC?

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 7. 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.