RBBN vs DOX vs AAOI Stock Comparison

Ribbon Communications, Amdocs and Applied Optoelectronics Prices as of Oct 29, 2026 Peers: Industry group
DOX Amdocs Ltd
$62.22 +8.0% 1M -26.1% 1Y
Market cap
$6.75B
P/E
15.1x
Revenue (TTM)
$4.65B
Div. yield
3.60%
Networking Equipment Technology
7 wins

Head to Head

11 decided of 12

Amdocs leads on 7 of the 12 questions below (Amdocs 7, Applied Optoelectronics 3, Ribbon Communications 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionRBBNDOXAAOILeader
Larger companyMarket capitalisation $291.65M $6.75B $6.68B DOX
Cheaper on earningsLower P/E, profitable companies only 15.7x 15.1x -113.3x DOX
Cheaper on forward earningsLower price / next fiscal year consensus EPS 32.6x 7.9x 111.5x DOX
Faster revenue growthRevenue growth, trailing twelve months -7.8% +0.1% +61.8% AAOI
More profitableNet margin, trailing twelve months 2.3% 9.8% -9.6% DOX
Better return on capitalReturn on invested capital 0.0% — -4.2% RBBN
Less leveragedLower net debt / EBITDA 9.4x 0.9x 13.8x DOX
Higher dividend yieldTrailing dividend yield — 3.60% — –
Better 1-year returnPrice return, last 12 months -52.8% -26.1% +123.2% AAOI
Better 5-year returnAnnualised price return, 5 years -21.5%/yr -4.4%/yr +59.6%/yr AAOI
Less volatileAnnualised volatility, 1 year 69.3% 29.8% 139.0% DOX
Higher overall scoreMean of the five percentile scores vs peers 41/100 64/100 32/100 DOX

Percentile Scorecard

RBBNDOXAAOI

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

AxisRBBNDOXAAOI
Valuation 62 #43 of 112 90 #12 of 112 12 #99 of 112
Growth 21 #86 of 108 14 #93 of 108 54 #50 of 108
Profitability 34 #69 of 104 83 #19 of 104 16 #88 of 104
Financial Health 18 #95 of 116 37 #74 of 116 71 #34 of 116
Shareholder Returns 71 #23 of 78 95 #5 of 78 9 #71 of 78
Overall 41 64 32
  • RBBN ranked among 121 companies in Computer Hardware
  • DOX ranked among 121 companies in Computer Hardware
  • AAOI ranked among 121 companies in Computer Hardware

Price Performance

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

Returns

PeriodRBBNDOXAAOISPY
1 month -8.9%+8.0%-21.3% +0.7%
3 months -23.1%+12.6%-12.1% +3.7%
6 months -38.3%-3.8%-51.8% +7.1%
Year to date -43.4%-22.7%+127.2% +12.8%
1 year -52.8%-26.1%+123.2% +11.9%
3 years -14.2%-21.2%+1,018.5% +85.2%
3 years, per year -5.0%-7.7%+123.8% +22.8%
5 years -70.2%-20.1%+935.2% +67.6%
5 years, per year -21.5%-4.4%+59.6% +10.9%
10 years -71.3%+6.3%+302.2% +262.0%
10 years, per year -11.7%+0.6%+14.9% +13.7%

Risk

MeasureRBBNDOXAAOISPY
Volatility, 1Y 69.3%29.8%139.0% 12.7%
Downside volatility, 1Y 79.5%32.6%127.1% 12.6%
Beta vs S&P 500, 1Y 1.330.254.32 1.00
Return / volatility, 1Y -0.76-0.870.89 0.94
Max drawdown, 5Y -78.9%-49.5%-82.6% -25.4%
From 52-week high -52.8%-27.2%-64.5% -1.2%
52-week high $3.45$85.49$223.10 $779.14
52-week low $1.32$49.87$19.49 $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.

MultipleRBBNDOXAAOI
P/E now vs peer median 15.7xmedian 32.9x 15.1xmedian 32.9x -113.3xmedian 32.9x
P/S now vs peer median 0.4xmedian 2.9x 1.5xmedian 2.9x 11.2xmedian 2.9x
EV/EBITDA now vs peer median 18.5xmedian 20.0x 9.0xmedian 20.0x -194.4xmedian 20.0x
P/FCF now vs peer median -10.0xmedian 30.2x 7.9xmedian 30.2x -11.1xmedian 30.2x
P/B now vs peer median 0.8xmedian 2.9x 2.0xmedian 2.9x 4.0xmedian 2.9x
PEG now vs peer median 0.48median 1.08 -4.14median 1.08 -3.41median 1.08

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 monthsRBBNDOXAAOI
Revenue $800.98M $4.65B $595.97M
Gross profit $386.62M $1.78B $172.33M
Operating income -$29.02M $626.70M -$67.41M
Net income $18.59M $457.53M -$57.02M
Free cash flow -$29.11M $858.80M -$600.81M
R&D $178.44M $343.21M $107.61M
EPS (diluted) $0.10 $4.17 $-0.70
Cash & equivalents $40.38M $206.45M $499.74M
Total debt $342.88M $3.25B $57.26M
Shares (diluted) 178.86M 109.66M 81.57M
Enterprise value $43.80M $5.79B $5.40B

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
MetricRBBNDOXAAOI
P/E 15.7x 15.1x -113.3x
P/FCF -10.0x 7.9x -11.1x
P/Operating cash flow -15.6x 9.0x -50.7x
P/S 0.4x 1.5x 11.2x
P/B 0.8x 2.0x 4.0x
P/Tangible book 1.1x 2.2x 4.0x
EV/EBITDA 18.5x 9.0x -194.4x
EV/EBIT -20.5x 11.9x -92.6x
EV/Revenue 0.7x 1.6x 10.5x
EV/FCF -20.4x 8.7x -10.4x
EV/Operating cash flow -31.8x 10.0x -47.3x
PEG (3Y EPS CAGR) 0.48 -4.14 -3.41

Growth

14 metrics
MetricRBBNDOXAAOI
Revenue growth (1Y) -7.8% 0.1% 61.8%
Revenue CAGR (3Y) -1.3% -1.1% 40.9%
Gross profit growth (1Y) -12.1% 2.9% 62.0%
Gross profit CAGR (3Y) -1.2% 1.5% 73.3%
Operating income growth (1Y) -240.9% -11.9% -40.6%
Operating income CAGR (3Y) 9.9% -3.0% -2.8%
Net income growth (1Y) 143.2% -18.0% 63.4%
Net income CAGR (3Y) 33.0% -7.0% 6.2%
EPS growth (1Y) 142.6% -14.5% 74.5%
EPS CAGR (3Y) 32.7% -3.7% 33.2%
Operating cash flow growth (1Y) -122.3% 1.6% 15.2%
Operating cash flow CAGR (3Y) -50.8% -0.8% -168.6%
Free cash flow growth (1Y) -155.4% 2.8% -146.3%
Free cash flow CAGR (3Y) -90.6% -3.2% -294.2%

Profitability

14 metrics
MetricRBBNDOXAAOI
Gross margin 48.3% 38.3% 28.9%
EBITDA margin 4.0% 17.9% -5.4%
Operating margin -3.6% 13.5% -11.3%
Pretax margin -8.9% 12.5% -10.6%
Net margin 2.3% 9.8% -9.6%
FCF margin -3.6% 18.5% -100.8%
Operating cash flow margin -2.3% 16.1% -22.1%
Return on equity 4.8% – -4.1%
Return on assets 1.6% 7.2% -2.9%
Return on invested capital 0.0% – -4.2%
Return on capital employed -3.5% 13.4% -4.5%
Asset turnover 0.7x 0.7x 0.3x
Cash conversion (OCF / net income) -1.0x 1.6x 2.3x
Stock comp / revenue 2.7% 2.4% 2.6%

Financial Health

11 metrics
MetricRBBNDOXAAOI
Debt / assets 29.8% 14.5% 2.5%
Debt / equity 0.9x 0.3x 0.0x
Net debt / EBITDA 9.4x 0.9x 13.8x
Debt / FCF -11.8x 1.1x -0.1x
Liabilities / assets 66.2% 48.1% 27.5%
Equity / assets 33.8% 51.9% 72.5%
Interest coverage – – -19.1x
Current ratio 1.3x 0.9x 2.8x
Quick ratio 1.1x 1.0x 1.9x
Cash ratio 0.1x 0.1x 1.2x
Altman Z-score -1.00 3.94 6.57

Shareholder Returns

7 metrics
MetricRBBNDOXAAOI
Dividend yield – 3.6% –
Net buyback yield 1.4% 7.8% -20.2%
Shareholder yield 1.4% 11.4% -20.2%
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.

ConsensusRBBNDOXAAOI
Forward P/E 32.6xFY2026 7.9xFY2026 111.5xFY2026
EPS, next fiscal year $0.05FY2026 $7.92FY2026 $0.71FY2026
EPS growth, next FY -92.4%FY2026 +13.3%FY2026 –
EPS growth, the year after +200.0% +4.0% +646.5%
Revenue, next fiscal year $790.52MFY2026 $4.46BFY2026 $994.70MFY2026
Revenue growth, next FY -6.4%FY2026 -1.6%FY2026 +118.3%FY2026
Revenue growth, the year after +11.9% +5.0% +185.6%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersRBBNDOXAAOI
Held by institutions 71.8% 93.0% 60.5%
Institutions holding 161 447 481
Change in shares held, QoQ -0.7% +0.5% -3.5%
Institutions buying 88 250 313
Institutions selling 41 152 143
Buyers to sellers 2.15 1.64 2.19

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.

RBBNDOXAAOI
RBBN 1.00 -0.02 0.20
DOX -0.02 1.00 -0.19
AAOI 0.20 -0.19 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, RBBN, DOX and AAOI?

Amdocs (DOX) is the largest by market capitalisation: Ribbon Communications (RBBN) $291.65M, Amdocs (DOX) $6.75B, Applied Optoelectronics (AAOI) $6.68B.

Which stock is cheaper, RBBN, DOX and AAOI?

Amdocs (DOX) trades on the lowest price-to-earnings ratio (Ribbon Communications (RBBN) 15.7x, Amdocs (DOX) 15.1x, Applied Optoelectronics (AAOI) -113.3x). On next year's consensus earnings, Amdocs (DOX) is cheapest (Ribbon Communications (RBBN) 32.6x, Amdocs (DOX) 7.9x, Applied Optoelectronics (AAOI) 111.5x). 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: Ribbon Communications (RBBN) -7.8%, Amdocs (DOX) +0.1%, Applied Optoelectronics (AAOI) +61.8%.

Which company is more profitable?

Amdocs (DOX) has the highest net margin (Ribbon Communications (RBBN) 2.3%, Amdocs (DOX) 9.8%, Applied Optoelectronics (AAOI) -9.6%). On return on invested capital, Ribbon Communications (RBBN) leads (Ribbon Communications (RBBN) 0.0%, Applied Optoelectronics (AAOI) -4.2%).

Which stock has performed better?

Over the past year Applied Optoelectronics (AAOI) returned the most: Ribbon Communications (RBBN) -52.8%, Amdocs (DOX) -26.1%, Applied Optoelectronics (AAOI) +123.2%. Over five years, Applied Optoelectronics (AAOI) compounded fastest (Ribbon Communications (RBBN) -21.5%/yr, Amdocs (DOX) -4.4%/yr, Applied Optoelectronics (AAOI) +59.6%/yr). Returns are price only, before dividends.

Which pays a higher dividend?

Only one of these companies pays a dividend: Amdocs (DOX) 3.60%. Ribbon Communications (RBBN) and Applied Optoelectronics (AAOI) pays no regular dividend.

Which stock is riskier?

By one-year price volatility, Amdocs (DOX) has been the steadiest (Ribbon Communications (RBBN) 69.3%, Amdocs (DOX) 29.8%, Applied Optoelectronics (AAOI) 139.0%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, RBBN, DOX and AAOI?

There is no single answer; it depends on what you are buying for. On the 12 head-to-head measures on this page, Amdocs (DOX) 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.