AAOI vs AUDC vs CALX Stock Comparison

Applied Optoelectronics, Audiocodes and Calix Prices as of Oct 27, 2026 Peers: Industry group
AUDC Audiocodes Ltd
$11.70 +9.8% 1M +29.3% 1Y
Market cap
$331.14M
P/E
46.9x
Revenue (TTM)
$249.25M
Div. yield
–
Networking Equipment Technology
4 wins
CALX Calix, Inc
$38.33 +15.6% 1M -37.2% 1Y
Market cap
$2.41B
P/E
47.1x
Revenue (TTM)
$1.11B
Div. yield
–
Networking Equipment Technology
3 wins

Head to Head

11 decided of 12

Applied Optoelectronics leads on 4 of the 12 questions below (Applied Optoelectronics 4, Audiocodes 4, Calix 3). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionAAOIAUDCCALXLeader
Larger companyMarket capitalisation $6.46B $331.14M $2.41B AAOI
Cheaper on earningsLower P/E, profitable companies only -113.3x 46.9x 47.1x AUDC
Cheaper on forward earningsLower price / next fiscal year consensus EPS 108.4x 18.3x 23.7x AUDC
Faster revenue growthRevenue growth, trailing twelve months +61.8% +2.5% +27.8% AAOI
More profitableNet margin, trailing twelve months -9.6% 2.8% 4.6% CALX
Better return on capitalReturn on invested capital -4.2% 9.1% — AUDC
Less leveragedLower net debt / EBITDA 13.8x -2.9x — AUDC
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months +106.7% +29.3% -37.2% AAOI
Better 5-year returnAnnualised price return, 5 years +58.7%/yr -19.5%/yr -8.8%/yr AAOI
Less volatileAnnualised volatility, 1 year 138.8% 42.0% 41.6% CALX
Higher overall scoreMean of the five percentile scores vs peers 33/100 56/100 76/100 CALX

Percentile Scorecard

AAOIAUDCCALX

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

AxisAAOIAUDCCALX
Valuation 13 #98 of 112 87 #16 of 112 60 #45 of 112
Growth 56 #49 of 109 17 #91 of 109 82 #20 of 109
Profitability 17 #87 of 104 68 #34 of 104 64 #38 of 104
Financial Health 72 #33 of 116 70 #36 of 116 76 #29 of 116
Shareholder Returns 9 #74 of 81 38 #51 of 81 98 #3 of 81
Overall 33 56 76
  • AAOI ranked among 122 companies in Computer Hardware
  • AUDC ranked among 122 companies in Computer Hardware
  • CALX ranked among 122 companies in Computer Hardware

Price Performance

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

Returns

PeriodAAOIAUDCCALXSPY
1 month -24.1%+9.8%+15.6% -0.2%
3 months -12.7%+19.8%+3.3% +3.9%
6 months -43.9%+33.7%-8.8% +8.2%
Year to date +120.7%+34.0%-27.6% +12.9%
1 year +106.7%+29.3%-37.2% +12.3%
3 years +993.0%+62.7%+17.2% +87.4%
3 years, per year +122.0%+17.6%+5.4% +23.3%
5 years +904.6%-66.2%-36.9% +67.9%
5 years, per year +58.7%-19.5%-8.8% +10.9%
10 years +284.9%+118.3%+508.4% +261.1%
10 years, per year +14.4%+8.1%+19.8% +13.7%

Risk

MeasureAAOIAUDCCALXSPY
Volatility, 1Y 138.8%42.0%41.6% 12.7%
Downside volatility, 1Y 126.6%47.1%44.0% 12.7%
Beta vs S&P 500, 1Y 4.311.150.88 1.00
Return / volatility, 1Y 0.770.70-0.89 0.97
Max drawdown, 5Y -82.6%-81.0%-65.3% -25.4%
From 52-week high -65.5%0.0%-44.0% -1.2%
52-week high $223.10$11.70$68.42 $779.14
52-week low $19.49$7.03$33.15 $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.

MultipleAAOIAUDCCALX
P/E now vs peer median -110.1xmedian 33.2x 47.2xmedian 33.2x 47.6xmedian 33.2x
P/S now vs peer median 10.9xmedian 2.8x 1.3xmedian 2.8x 2.2xmedian 2.8x
EV/EBITDA now vs peer median -188.5xmedian 20.0x 13.9xmedian 20.0x 28.0xmedian 20.0x
P/FCF now vs peer median -10.8xmedian 29.8x 9.7xmedian 29.8x 28.3xmedian 29.8x
P/B now vs peer median 3.9xmedian 3.0x 2.2xmedian 3.0x 3.4xmedian 3.0x
PEG now vs peer median -3.32median 1.17 -2.80median 1.17 6.72median 1.17

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 monthsAAOIAUDCCALX
Revenue $595.97M $249.25M $1.11B
Gross profit $172.33M $163.86M $628.73M
Operating income -$67.41M $14.36M $61.25M
Net income -$57.02M $7.06M $51.19M
Free cash flow -$600.81M $32.61M $85.42M
R&D $107.61M $54.05M $207.99M
EPS (diluted) $-0.70 $0.24 $0.78
Cash & equivalents $499.74M $51.41M $68.91M
Total debt $57.26M $27.00M –
Shares (diluted) 81.57M 28.98M 65.51M
Enterprise value $5.18B $58.01M $1.25B

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
MetricAAOIAUDCCALX
P/E -110.1x 47.2x 47.6x
P/FCF -10.8x 9.7x 28.3x
P/Operating cash flow -49.3x 11.7x 22.0x
P/S 10.9x 1.3x 2.2x
P/B 3.9x 2.2x 3.4x
P/Tangible book 3.9x 2.9x 3.4x
EV/EBITDA -188.5x 13.9x 28.0x
EV/EBIT -89.8x 18.3x 36.2x
EV/Revenue 10.2x 1.1x 2.0x
EV/FCF -10.1x 8.1x 26.0x
EV/Operating cash flow -45.9x 9.7x 20.3x
PEG (3Y EPS CAGR) -3.32 -2.80 6.72

Growth

14 metrics
MetricAAOIAUDCCALX
Revenue growth (1Y) 61.8% 2.5% 27.8%
Revenue CAGR (3Y) 40.9% -1.3% 3.9%
Gross profit growth (1Y) 62.0% 3.5% 30.3%
Gross profit CAGR (3Y) 73.3% -0.2% 7.4%
Operating income growth (1Y) -40.6% -5.7% 273.3%
Operating income CAGR (3Y) -2.8% -5.0% 3.8%
Net income growth (1Y) 63.4% -48.7% 290.5%
Net income CAGR (3Y) 6.2% -20.0% 4.9%
EPS growth (1Y) 74.5% -45.8% 287.6%
EPS CAGR (3Y) 33.2% -16.9% 7.1%
Operating cash flow growth (1Y) 15.2% -38.9% 24.5%
Operating cash flow CAGR (3Y) -168.6% 50.4% 41.8%
Free cash flow growth (1Y) -146.3% -42.4% 19.4%
Free cash flow CAGR (3Y) -294.2% 39.0% 62.0%

Profitability

14 metrics
MetricAAOIAUDCCALX
Gross margin 28.9% 65.7% 56.6%
EBITDA margin -5.4% 7.6% 7.1%
Operating margin -11.3% 5.8% 5.5%
Pretax margin -10.6% 4.5% 6.5%
Net margin -9.6% 2.8% 4.6%
FCF margin -100.8% 13.1% 7.7%
Operating cash flow margin -22.1% 10.9% 9.9%
Return on equity -4.1% 10.3% 7.1%
Return on assets -2.9% 5.0% 5.4%
Return on invested capital -4.2% 9.1% –
Return on capital employed -4.5% 6.5% 8.2%
Asset turnover 0.3x 0.8x 1.2x
Cash conversion (OCF / net income) 2.3x 3.8x 2.1x
Stock comp / revenue 2.6% 2.4% 7.2%

Financial Health

11 metrics
MetricAAOIAUDCCALX
Debt / assets 2.5% 2.4% –
Debt / equity 0.0x 0.1x –
Net debt / EBITDA 13.8x -2.9x –
Debt / FCF -0.1x 0.2x –
Liabilities / assets 27.5% 52.8% 25.6%
Equity / assets 72.5% 47.2% 74.4%
Interest coverage -19.1x – –
Current ratio 2.8x 1.9x 2.8x
Quick ratio 1.9x 1.4x 1.6x
Cash ratio 1.2x 0.7x 0.9x
Altman Z-score 6.39 – 7.28

Shareholder Returns

7 metrics
MetricAAOIAUDCCALX
Dividend yield – 3.4% –
Net buyback yield -20.8% -13.1% 7.9%
Shareholder yield -20.8% -9.6% 7.9%
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.

ConsensusAAOIAUDCCALX
Forward P/E 108.4xFY2026 18.3xFY2026 23.7xFY2026
EPS, next fiscal year $0.71FY2026 $0.64FY2026 $1.62FY2026
EPS growth, next FY – +4.9%FY2026 +20.9%FY2026
EPS growth, the year after +646.5% +3.1% +48.1%
Revenue, next fiscal year $994.70MFY2026 $265.51MFY2026 $1.11BFY2026
Revenue growth, next FY +118.3%FY2026 +8.1%FY2026 +11.0%FY2026
Revenue growth, the year after +185.6% +1.2% +18.8%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersAAOIAUDCCALX
Held by institutions 60.5% 33.5% 94.5%
Institutions holding 481 67 288
Change in shares held, QoQ -3.5% +7.5% +0.5%
Institutions buying 313 31 148
Institutions selling 143 20 111
Buyers to sellers 2.19 1.55 1.33

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.

AAOIAUDCCALX
AAOI 1.00 0.21 0.24
AUDC 0.21 1.00 0.20
CALX 0.24 0.20 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, AAOI, AUDC and CALX?

Applied Optoelectronics (AAOI) is the largest by market capitalisation: Applied Optoelectronics (AAOI) $6.46B, Audiocodes (AUDC) $331.14M, Calix (CALX) $2.41B.

Which stock is cheaper, AAOI, AUDC and CALX?

Audiocodes (AUDC) trades on the lowest price-to-earnings ratio (Applied Optoelectronics (AAOI) -113.3x, Audiocodes (AUDC) 46.9x, Calix (CALX) 47.1x). On next year's consensus earnings, Audiocodes (AUDC) is cheapest (Applied Optoelectronics (AAOI) 108.4x, Audiocodes (AUDC) 18.3x, Calix (CALX) 23.7x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Applied Optoelectronics (AAOI) grew revenue fastest over the trailing twelve months: Applied Optoelectronics (AAOI) +61.8%, Audiocodes (AUDC) +2.5%, Calix (CALX) +27.8%.

Which company is more profitable?

Calix (CALX) has the highest net margin (Applied Optoelectronics (AAOI) -9.6%, Audiocodes (AUDC) 2.8%, Calix (CALX) 4.6%). On return on invested capital, Audiocodes (AUDC) leads (Applied Optoelectronics (AAOI) -4.2%, Audiocodes (AUDC) 9.1%).

Which stock has performed better?

Over the past year Applied Optoelectronics (AAOI) returned the most: Applied Optoelectronics (AAOI) +106.7%, Audiocodes (AUDC) +29.3%, Calix (CALX) -37.2%. Over five years, Applied Optoelectronics (AAOI) compounded fastest (Applied Optoelectronics (AAOI) +58.7%/yr, Audiocodes (AUDC) -19.5%/yr, Calix (CALX) -8.8%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Calix (CALX) has been the steadiest (Applied Optoelectronics (AAOI) 138.8%, Audiocodes (AUDC) 42.0%, Calix (CALX) 41.6%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, AAOI, AUDC and CALX?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Applied Optoelectronics (AAOI) leads on 4. 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.