AAOI vs ATEN vs CALX Stock Comparison

Applied Optoelectronics, A10 Networks and Calix Prices as of Nov 2, 2026 Peers: Industry group
ATEN A10 Networks, Inc.
$23.53 -14.9% 1M +31.9% 1Y
Market cap
$1.73B
P/E
40.2x
Revenue (TTM)
$310.17M
Div. yield
–
Networking Equipment Technology
5 wins
CALX Calix, Inc
$36.19 +4.0% 1M -47.1% 1Y
Market cap
$2.13B
P/E
41.7x
Revenue (TTM)
$1.11B
Div. yield
–
Networking Equipment Technology
2 wins

Head to Head

11 decided of 12

A10 Networks leads on 5 of the 12 questions below (A10 Networks 5, Applied Optoelectronics 4, Calix 2). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionAAOIATENCALXLeader
Larger companyMarket capitalisation $4.73B $1.73B $2.13B AAOI
Cheaper on earningsLower P/E, profitable companies only -83.0x 40.2x 41.7x ATEN
Cheaper on forward earningsLower price / next fiscal year consensus EPS 90.1x 24.3x 20.5x CALX
Faster revenue growthRevenue growth, trailing twelve months +61.8% +12.2% +27.8% AAOI
More profitableNet margin, trailing twelve months -9.6% 13.9% 4.6% ATEN
Better return on capitalReturn on invested capital -4.2% 8.9% — ATEN
Less leveragedLower net debt / EBITDA 13.8x -2.1x — ATEN
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months +75.8% +31.9% -47.1% AAOI
Better 5-year returnAnnualised price return, 5 years +49.5%/yr +8.1%/yr -13.0%/yr AAOI
Less volatileAnnualised volatility, 1 year 140.2% 40.4% 40.8% ATEN
Higher overall scoreMean of the five percentile scores vs peers 32/100 51/100 75/100 CALX

Percentile Scorecard

AAOIATENCALX

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

AxisAAOIATENCALX
Valuation 11 #100 of 112 45 #62 of 112 59 #47 of 112
Growth 54 #50 of 108 29 #77 of 108 82 #20 of 108
Profitability 16 #88 of 104 85 #16 of 104 64 #38 of 104
Financial Health 71 #34 of 116 32 #79 of 116 75 #30 of 116
Shareholder Returns 8 #74 of 80 65 #29 of 80 98 #3 of 80
Overall 32 51 75
  • AAOI ranked among 121 companies in Computer Hardware
  • ATEN ranked among 121 companies in Computer Hardware
  • CALX ranked among 121 companies in Computer Hardware

Price Performance

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

Returns

PeriodAAOIATENCALXSPY
1 month -45.9%-14.9%+4.0% -2.3%
3 months -43.3%-21.5%-3.2% -0.7%
6 months -63.9%-13.0%-16.7% +4.8%
Year to date +79.3%+33.0%-31.6% +10.3%
1 year +75.8%+31.9%-47.1% +10.3%
3 years +560.0%+115.3%+1.7% +73.0%
3 years, per year +87.7%+29.1%+0.6% +20.1%
5 years +646.7%+47.8%-50.0% +61.9%
5 years, per year +49.5%+8.1%-13.0% +10.1%
10 years +210.9%+208.4%+444.2% +258.6%
10 years, per year +12.0%+11.9%+18.5% +13.6%

Risk

MeasureAAOIATENCALXSPY
Volatility, 1Y 140.2%40.4%40.8% 12.8%
Downside volatility, 1Y 129.1%43.3%44.0% 12.8%
Beta vs S&P 500, 1Y 4.471.150.98 1.00
Return / volatility, 1Y 0.540.79-1.16 0.80
Max drawdown, 5Y -82.6%-44.6%-65.3% -25.4%
From 52-week high -72.0%-38.3%-46.2% -3.5%
52-week high $223.10$38.14$67.24 $779.14
52-week low $19.49$16.55$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.

MultipleAAOIATENCALX
P/E now vs peer median -89.4xmedian 29.9x 39.5xmedian 29.9x 44.9xmedian 29.9x
P/S now vs peer median 8.8xmedian 2.8x 5.5xmedian 2.8x 2.1xmedian 2.8x
EV/EBITDA now vs peer median -150.5xmedian 18.5x 23.6xmedian 18.5x 26.3xmedian 18.5x
P/FCF now vs peer median -8.8xmedian 28.0x 28.0xmedian 28.0x 26.7xmedian 28.0x
P/B now vs peer median 3.2xmedian 2.8x 7.2xmedian 2.8x 3.2xmedian 2.8x
PEG now vs peer median -2.69median 1.00 -18.40median 1.00 6.35median 1.00

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 monthsAAOIATENCALX
Revenue $595.97M $310.17M $1.11B
Gross profit $172.33M $246.21M $628.73M
Operating income -$67.41M $50.08M $61.25M
Net income -$57.02M $42.97M $51.19M
Free cash flow -$600.81M $60.94M $85.42M
R&D $107.61M $77.12M $207.99M
EPS (diluted) $-0.70 $0.57 $0.78
Cash & equivalents $499.74M $54.70M $68.91M
Total debt $57.26M $219.52M –
Shares (diluted) 81.57M 75.65M 65.51M
Enterprise value $3.45B $252.38M $968.18M

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
MetricAAOIATENCALX
P/E -89.4x 39.5x 44.9x
P/FCF -8.8x 28.0x 26.7x
P/Operating cash flow -40.0x 22.2x 20.8x
P/S 8.8x 5.5x 2.1x
P/B 3.2x 7.2x 3.2x
P/Tangible book 3.2x 7.6x 3.2x
EV/EBITDA -150.5x 23.6x 26.3x
EV/EBIT -71.7x 31.3x 34.0x
EV/Revenue 8.1x 5.1x 1.9x
EV/FCF -8.0x 25.7x 24.4x
EV/Operating cash flow -36.7x 20.4x 19.0x
PEG (3Y EPS CAGR) -2.69 -18.40 6.35

Growth

14 metrics
MetricAAOIATENCALX
Revenue growth (1Y) 61.8% 12.2% 27.8%
Revenue CAGR (3Y) 40.9% 4.3% 3.9%
Gross profit growth (1Y) 62.0% 11.7% 30.3%
Gross profit CAGR (3Y) 73.3% 4.0% 7.4%
Operating income growth (1Y) -40.6% 4.5% 273.3%
Operating income CAGR (3Y) -2.8% -0.2% 3.8%
Net income growth (1Y) 63.4% -15.8% 290.5%
Net income CAGR (3Y) 6.2% -2.1% 4.9%
EPS growth (1Y) 74.5% -18.6% 287.6%
EPS CAGR (3Y) 33.2% -2.1% 7.1%
Operating cash flow growth (1Y) 15.2% -9.8% 24.5%
Operating cash flow CAGR (3Y) -168.6% 8.6% 41.8%
Free cash flow growth (1Y) -146.3% -13.7% 19.4%
Free cash flow CAGR (3Y) -294.2% 7.4% 62.0%

Profitability

14 metrics
MetricAAOIATENCALX
Gross margin 28.9% 79.4% 56.6%
EBITDA margin -5.4% 21.4% 7.1%
Operating margin -11.3% 16.1% 5.5%
Pretax margin -10.6% 17.5% 6.5%
Net margin -9.6% 13.9% 4.6%
FCF margin -100.8% 19.6% 7.7%
Operating cash flow margin -22.1% 24.8% 9.9%
Return on equity -4.1% 18.7% 7.1%
Return on assets -2.9% 6.5% 5.4%
Return on invested capital -4.2% 8.9% –
Return on capital employed -4.5% 17.8% 8.2%
Asset turnover 0.3x 0.5x 1.2x
Cash conversion (OCF / net income) 2.3x 1.8x 2.1x
Stock comp / revenue 2.6% 7.5% 7.2%

Financial Health

11 metrics
MetricAAOIATENCALX
Debt / assets 2.5% 32.4% –
Debt / equity 0.0x 0.9x –
Net debt / EBITDA 13.8x -2.1x –
Debt / FCF -0.1x 3.6x –
Liabilities / assets 27.5% 64.9% 25.6%
Equity / assets 72.5% 35.1% 74.4%
Interest coverage -19.1x – –
Current ratio 2.8x 1.3x 2.8x
Quick ratio 1.9x 1.1x 1.6x
Cash ratio 1.2x 1.0x 0.9x
Altman Z-score 5.24 3.27 6.95

Shareholder Returns

7 metrics
MetricAAOIATENCALX
Dividend yield – 1.0% –
Net buyback yield -25.6% 1.2% 8.4%
Shareholder yield -25.6% 2.3% 8.4%
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.

ConsensusAAOIATENCALX
Forward P/E 90.1xFY2026 24.3xFY2026 20.5xFY2026
EPS, next fiscal year $0.71FY2026 $1.00FY2026 $1.62FY2026
EPS growth, next FY – +11.1%FY2026 +20.9%FY2026
EPS growth, the year after +646.5% +13.0% +48.1%
Revenue, next fiscal year $994.70MFY2026 $342.96MFY2026 $1.11BFY2026
Revenue growth, next FY +118.3%FY2026 +18.0%FY2026 +11.0%FY2026
Revenue growth, the year after +185.6% +3.4% +18.8%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersAAOIATENCALX
Held by institutions 60.5% 100.0% 94.5%
Institutions holding 482 312 290
Change in shares held, QoQ -3.5% +5.8% +0.5%
Institutions buying 313 172 148
Institutions selling 144 99 111
Buyers to sellers 2.17 1.74 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.

AAOIATENCALX
AAOI 1.00 0.31 0.25
ATEN 0.31 1.00 0.22
CALX 0.25 0.22 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, AAOI, ATEN and CALX?

Applied Optoelectronics (AAOI) is the largest by market capitalisation: Applied Optoelectronics (AAOI) $4.73B, A10 Networks (ATEN) $1.73B, Calix (CALX) $2.13B.

Which stock is cheaper, AAOI, ATEN and CALX?

A10 Networks (ATEN) trades on the lowest price-to-earnings ratio (Applied Optoelectronics (AAOI) -83.0x, A10 Networks (ATEN) 40.2x, Calix (CALX) 41.7x). On next year's consensus earnings, Calix (CALX) is cheapest (Applied Optoelectronics (AAOI) 90.1x, A10 Networks (ATEN) 24.3x, Calix (CALX) 20.5x). 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%, A10 Networks (ATEN) +12.2%, Calix (CALX) +27.8%.

Which company is more profitable?

A10 Networks (ATEN) has the highest net margin (Applied Optoelectronics (AAOI) -9.6%, A10 Networks (ATEN) 13.9%, Calix (CALX) 4.6%). On return on invested capital, A10 Networks (ATEN) leads (Applied Optoelectronics (AAOI) -4.2%, A10 Networks (ATEN) 8.9%).

Which stock has performed better?

Over the past year Applied Optoelectronics (AAOI) returned the most: Applied Optoelectronics (AAOI) +75.8%, A10 Networks (ATEN) +31.9%, Calix (CALX) -47.1%. Over five years, Applied Optoelectronics (AAOI) compounded fastest (Applied Optoelectronics (AAOI) +49.5%/yr, A10 Networks (ATEN) +8.1%/yr, Calix (CALX) -13.0%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, A10 Networks (ATEN) has been the steadiest (Applied Optoelectronics (AAOI) 140.2%, A10 Networks (ATEN) 40.4%, Calix (CALX) 40.8%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, AAOI, ATEN 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, A10 Networks (ATEN) leads on 5. 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.