CALX vs RBBN Stock Comparison

Calix and Ribbon Communications Prices as of Oct 26, 2026 Peers: Industry group
CALX Calix, Inc
$37.69 +13.7% 1M -38.5% 1Y
Market cap
$2.45B
P/E
47.8x
Revenue (TTM)
$1.11B
Div. yield
–
Networking Equipment Technology
8 wins

Head to Head

9 decided of 12

Calix leads on 8 of the 12 questions below (Calix 8, Ribbon Communications 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionCALXRBBNLeader
Larger companyMarket capitalisation $2.45B $242.83M CALX
Cheaper on earningsLower P/E, profitable companies only 47.8x 15.6x RBBN
Cheaper on forward earningsLower price / next fiscal year consensus EPS 23.3x 26.8x CALX
Faster revenue growthRevenue growth, trailing twelve months +27.8% -7.6% CALX
More profitableNet margin, trailing twelve months 4.6% 2.0% CALX
Better return on capitalReturn on invested capital — 0.0% –
Less leveragedLower net debt / EBITDA — 9.3x –
Higher dividend yieldTrailing dividend yield 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months -38.5% -62.3% CALX
Better 5-year returnAnnualised price return, 5 years -8.5%/yr -25.6%/yr CALX
Less volatileAnnualised volatility, 1 year 41.6% 67.4% CALX
Higher overall scoreMean of the five percentile scores vs peers 76/100 54/100 CALX

Percentile Scorecard

CALXRBBN

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

AxisCALXRBBN
Valuation 59 #46 of 111 80 #23 of 111
Growth 81 #21 of 108 51 #54 of 108
Profitability 65 #37 of 104 38 #65 of 104
Financial Health 75 #29 of 115 14 #99 of 115
Shareholder Returns 98 #3 of 81 89 #10 of 81
Overall 76 54
  • CALX ranked among 121 companies in Computer Hardware
  • RBBN ranked among 121 companies in Computer Hardware

Price Performance

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

Returns

PeriodCALXRBBNSPY
1 month +13.7%-25.6% -0.8%
3 months +2.2%-34.3% +3.5%
6 months -11.6%-49.6% +7.0%
Year to date -28.8%-53.5% +12.2%
1 year -38.5%-62.3% +13.0%
3 years +15.2%-35.6% +86.3%
3 years, per year +4.8%-13.6% +23.1%
5 years -35.9%-77.1% +68.6%
5 years, per year -8.5%-25.6% +11.0%
10 years +493.5%-78.9% +258.0%
10 years, per year +19.5%-14.4% +13.6%

Risk

MeasureCALXRBBNSPY
Volatility, 1Y 41.6%67.4% 12.7%
Downside volatility, 1Y 44.0%79.2% 12.7%
Beta vs S&P 500, 1Y 0.881.29 1.00
Return / volatility, 1Y -0.92-0.92 1.02
Max drawdown, 5Y -65.3%-78.9% -25.4%
From 52-week high -44.9%-61.3% -1.8%
52-week high $68.42$3.46 $779.14
52-week low $33.15$1.32 $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.

MultipleCALXRBBN
P/E now vs peer median 46.8xmedian 32.0x 15.2xmedian 32.0x
P/S now vs peer median 2.1xmedian 2.8x 0.3xmedian 2.8x
EV/EBITDA now vs peer median 27.5xmedian 19.4x 17.2xmedian 19.4x
P/FCF now vs peer median 27.8xmedian 29.0x 32.6xmedian 29.0x
P/B now vs peer median 3.3xmedian 2.9x 0.6xmedian 2.9x
PEG now vs peer median 6.61median 1.13 0.49median 1.13

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 monthsCALXRBBN
Revenue $1.11B $797.64M
Gross profit $628.73M $389.06M
Operating income $61.25M -$31.85M
Net income $51.19M $15.60M
Free cash flow $85.42M $7.35M
R&D $207.99M $179.91M
EPS (diluted) $0.78 $0.09
Cash & equivalents $68.91M $43.51M
Total debt – $329.36M
Shares (diluted) 65.51M 177.25M
Enterprise value $1.28B -$39.43M

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
MetricCALXRBBN
P/E 46.8x 15.2x
P/FCF 27.8x 32.6x
P/Operating cash flow 21.7x 10.8x
P/S 2.1x 0.3x
P/B 3.3x 0.6x
P/Tangible book 3.3x 0.9x
EV/EBITDA 27.5x 17.2x
EV/EBIT 35.6x -16.5x
EV/Revenue 2.0x 0.7x
EV/FCF 25.5x 71.5x
EV/Operating cash flow 19.9x 23.6x
PEG (3Y EPS CAGR) 6.61 0.49

Growth

14 metrics
MetricCALXRBBN
Revenue growth (1Y) 27.8% -7.6%
Revenue CAGR (3Y) 3.9% -1.6%
Gross profit growth (1Y) 30.3% -11.9%
Gross profit CAGR (3Y) 7.4% -1.0%
Operating income growth (1Y) 273.3% -288.4%
Operating income CAGR (3Y) 3.8% 10.1%
Net income growth (1Y) 290.5% 135.1%
Net income CAGR (3Y) 4.9% 31.4%
EPS growth (1Y) 287.6% 135.0%
EPS CAGR (3Y) 7.1% 31.2%
Operating cash flow growth (1Y) 24.5% -47.8%
Operating cash flow CAGR (3Y) 41.8% 49.9%
Free cash flow growth (1Y) 19.4% -7.7%
Free cash flow CAGR (3Y) 62.0% 99.7%

Profitability

14 metrics
MetricCALXRBBN
Gross margin 56.6% 48.8%
EBITDA margin 7.1% 3.8%
Operating margin 5.5% -4.0%
Pretax margin 6.5% -9.4%
Net margin 4.6% 2.0%
FCF margin 7.7% 0.9%
Operating cash flow margin 9.9% 2.8%
Return on equity 7.1% 3.9%
Return on assets 5.4% 1.4%
Return on invested capital – 0.0%
Return on capital employed 8.2% -3.8%
Asset turnover 1.2x 0.7x
Cash conversion (OCF / net income) 2.1x 1.4x
Stock comp / revenue 7.2% 2.7%

Financial Health

11 metrics
MetricCALXRBBN
Debt / assets – 28.8%
Debt / equity – 0.8x
Net debt / EBITDA – 9.3x
Debt / FCF – 44.8x
Liabilities / assets 25.6% 65.6%
Equity / assets 74.4% 34.4%
Interest coverage – –
Current ratio 2.8x 1.3x
Quick ratio 1.6x 1.1x
Cash ratio 0.9x 0.1x
Altman Z-score 7.18 -1.06

Shareholder Returns

7 metrics
MetricCALXRBBN
Dividend yield – –
Net buyback yield 8.1% 3.2%
Shareholder yield 8.1% 3.2%
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.

ConsensusCALXRBBN
Forward P/E 23.3xFY2026 26.8xFY2026
EPS, next fiscal year $1.62FY2026 $0.05FY2026
EPS growth, next FY +20.9%FY2026 -92.4%FY2026
EPS growth, the year after +48.1% +200.0%
Revenue, next fiscal year $1.11BFY2026 $790.52MFY2026
Revenue growth, next FY +11.0%FY2026 -6.4%FY2026
Revenue growth, the year after +18.8% +11.9%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersCALXRBBN
Held by institutions 94.5% 71.8%
Institutions holding 288 161
Change in shares held, QoQ +0.5% -0.7%
Institutions buying 148 88
Institutions selling 111 41
Buyers to sellers 1.33 2.15

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.

CALXRBBN
CALX 1.00 0.13
RBBN 0.13 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, CALX and RBBN?

Calix (CALX) is the largest by market capitalisation: Calix (CALX) $2.45B, Ribbon Communications (RBBN) $242.83M.

Which stock is cheaper, CALX and RBBN?

Ribbon Communications (RBBN) trades on the lowest price-to-earnings ratio (Calix (CALX) 47.8x, Ribbon Communications (RBBN) 15.6x). On next year's consensus earnings, Calix (CALX) is cheapest (Calix (CALX) 23.3x, Ribbon Communications (RBBN) 26.8x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Calix (CALX) grew revenue fastest over the trailing twelve months: Calix (CALX) +27.8%, Ribbon Communications (RBBN) -7.6%.

Which company is more profitable?

Calix (CALX) has the highest net margin (Calix (CALX) 4.6%, Ribbon Communications (RBBN) 2.0%).

Which stock has performed better?

Over the past year Calix (CALX) returned the most: Calix (CALX) -38.5%, Ribbon Communications (RBBN) -62.3%. Over five years, Calix (CALX) compounded fastest (Calix (CALX) -8.5%/yr, Ribbon Communications (RBBN) -25.6%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Calix (CALX) has been the steadiest (Calix (CALX) 41.6%, Ribbon Communications (RBBN) 67.4%). Volatility measures how widely the price swings, not the risk of the business.

Do CALX and RBBN move together?

Their daily returns over the past year have a correlation of 0.13, a weak relationship. Holding both diversifies more than two closely linked stocks would.

Which is the better stock, CALX and RBBN?

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