CALX vs EXTR vs RBBN Stock Comparison

Calix, Extreme Networks 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
$2.43B
P/E
47.5x
Revenue (TTM)
$1.11B
Div. yield
–
Networking Equipment Technology
4 wins
EXTR Extreme Networks Inc
$22.70 +5.5% 1M +8.7% 1Y
Market cap
$3.17B
P/E
75.2x
Revenue (TTM)
$1.28B
Div. yield
–
Networking Equipment Technology
6 wins

Head to Head

11 decided of 12

Extreme Networks leads on 6 of the 12 questions below (Extreme Networks 6, Calix 4, Ribbon Communications 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionCALXEXTRRBBNLeader
Larger companyMarket capitalisation $2.43B $3.17B $247.27M EXTR
Cheaper on earningsLower P/E, profitable companies only 47.5x 75.2x 15.9x RBBN
Cheaper on forward earningsLower price / next fiscal year consensus EPS 23.3x 16.4x 26.8x EXTR
Faster revenue growthRevenue growth, trailing twelve months +27.8% +12.6% -7.6% CALX
More profitableNet margin, trailing twelve months 4.6% 3.3% 2.0% CALX
Better return on capitalReturn on invested capital — 19.4% 0.0% EXTR
Less leveragedLower net debt / EBITDA — -0.6x 9.3x EXTR
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months -38.5% +8.7% -62.3% EXTR
Better 5-year returnAnnualised price return, 5 years -8.5%/yr +18.6%/yr -25.6%/yr EXTR
Less volatileAnnualised volatility, 1 year 41.6% 55.5% 67.4% CALX
Higher overall scoreMean of the five percentile scores vs peers 76/100 51/100 54/100 CALX

Percentile Scorecard

CALXEXTRRBBN

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

AxisCALXEXTRRBBN
Valuation 59 #46 of 111 37 #70 of 111 80 #23 of 111
Growth 81 #21 of 108 39 #66 of 108 51 #54 of 108
Profitability 65 #37 of 104 70 #32 of 104 38 #65 of 104
Financial Health 75 #29 of 115 23 #89 of 115 14 #99 of 115
Shareholder Returns 98 #3 of 81 88 #11 of 81 89 #10 of 81
Overall 76 51 54
  • CALX ranked among 121 companies in Computer Hardware
  • EXTR 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

PeriodCALXEXTRRBBNSPY
1 month +13.7%+5.5%-25.6% -0.8%
3 months +2.2%-24.2%-34.3% +3.5%
6 months -11.6%+30.0%-49.6% +7.0%
Year to date -28.8%+36.3%-53.5% +12.2%
1 year -38.5%+8.7%-62.3% +13.0%
3 years +15.2%+10.5%-35.6% +86.3%
3 years, per year +4.8%+3.4%-13.6% +23.1%
5 years -35.9%+134.7%-77.1% +68.6%
5 years, per year -8.5%+18.6%-25.6% +11.0%
10 years +493.5%+434.1%-78.9% +258.0%
10 years, per year +19.5%+18.2%-14.4% +13.6%

Risk

MeasureCALXEXTRRBBNSPY
Volatility, 1Y 41.6%55.5%67.4% 12.7%
Downside volatility, 1Y 44.0%56.6%79.2% 12.7%
Beta vs S&P 500, 1Y 0.881.541.29 1.00
Return / volatility, 1Y -0.920.16-0.92 1.02
Max drawdown, 5Y -65.3%-67.2%-78.9% -25.4%
From 52-week high -44.9%-32.7%-61.3% -1.8%
52-week high $68.42$33.71$3.46 $779.14
52-week low $33.15$13.74$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.

MultipleCALXEXTRRBBN
P/E now vs peer median 46.8xmedian 32.0x 71.5xmedian 32.0x 15.2xmedian 32.0x
P/S now vs peer median 2.1xmedian 2.8x 2.3xmedian 2.8x 0.3xmedian 2.8x
EV/EBITDA now vs peer median 27.5xmedian 19.4x 34.0xmedian 19.4x 17.2xmedian 19.4x
P/FCF now vs peer median 27.8xmedian 29.0x 31.3xmedian 29.0x 32.6xmedian 29.0x
P/B now vs peer median 3.3xmedian 2.9x 33.6xmedian 2.9x 0.6xmedian 2.9x
PEG now vs peer median 6.61median 1.13 -3.79median 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 monthsCALXEXTRRBBN
Revenue $1.11B $1.28B $797.64M
Gross profit $628.73M $789.14M $389.06M
Operating income $61.25M $62.70M -$31.85M
Net income $51.19M $42.12M $15.60M
Free cash flow $85.42M $95.24M $7.35M
R&D $207.99M $233.88M $179.91M
EPS (diluted) $0.78 $0.31 $0.09
Cash & equivalents $68.91M $211.76M $43.51M
Total debt – $163.72M $329.36M
Shares (diluted) 65.51M 134.97M 177.25M
Enterprise value $1.27B $2.31B -$35.00M

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
MetricCALXEXTRRBBN
P/E 46.8x 71.5x 15.2x
P/FCF 27.8x 31.3x 32.6x
P/Operating cash flow 21.7x 24.2x 10.8x
P/S 2.1x 2.3x 0.3x
P/B 3.3x 33.6x 0.6x
P/Tangible book 3.3x 34.8x 0.9x
EV/EBITDA 27.5x 34.0x 17.2x
EV/EBIT 35.6x 46.7x -16.5x
EV/Revenue 2.0x 2.3x 0.7x
EV/FCF 25.5x 30.8x 71.5x
EV/Operating cash flow 19.9x 23.8x 23.6x
PEG (3Y EPS CAGR) 6.61 -3.79 0.49

Growth

14 metrics
MetricCALXEXTRRBBN
Revenue growth (1Y) 27.8% 12.6% -7.6%
Revenue CAGR (3Y) 3.9% -0.7% -1.6%
Gross profit growth (1Y) 30.3% 11.3% -11.9%
Gross profit CAGR (3Y) 7.4% 1.5% -1.0%
Operating income growth (1Y) 273.3% 269.9% -288.4%
Operating income CAGR (3Y) 3.8% -16.7% 10.1%
Net income growth (1Y) 290.5% 664.1% 135.1%
Net income CAGR (3Y) 4.9% -18.6% 31.4%
EPS growth (1Y) 287.6% 653.0% 135.0%
EPS CAGR (3Y) 7.1% -18.9% 31.2%
Operating cash flow growth (1Y) 24.5% -19.0% -47.8%
Operating cash flow CAGR (3Y) 41.8% -20.9% 49.9%
Free cash flow growth (1Y) 19.4% -25.2% -7.7%
Free cash flow CAGR (3Y) 62.0% -26.0% 99.7%

Profitability

14 metrics
MetricCALXEXTRRBBN
Gross margin 56.6% 61.5% 48.8%
EBITDA margin 7.1% 6.7% 3.8%
Operating margin 5.5% 4.9% -4.0%
Pretax margin 6.5% 4.0% -9.4%
Net margin 4.6% 3.3% 2.0%
FCF margin 7.7% 7.4% 0.9%
Operating cash flow margin 9.9% 9.6% 2.8%
Return on equity 7.1% 50.3% 3.9%
Return on assets 5.4% 3.6% 1.4%
Return on invested capital – 19.4% 0.0%
Return on capital employed 8.2% 10.8% -3.8%
Asset turnover 1.2x 1.1x 0.7x
Cash conversion (OCF / net income) 2.1x 2.9x 1.4x
Stock comp / revenue 7.2% 6.9% 2.7%

Financial Health

11 metrics
MetricCALXEXTRRBBN
Debt / assets – 13.9% 28.8%
Debt / equity – 1.8x 0.8x
Net debt / EBITDA – -0.6x 9.3x
Debt / FCF – 1.7x 44.8x
Liabilities / assets 25.6% 92.5% 65.6%
Equity / assets 74.4% 7.5% 34.4%
Interest coverage – 4.5x –
Current ratio 2.8x 0.9x 1.3x
Quick ratio 1.6x 0.6x 1.1x
Cash ratio 0.9x 0.4x 0.1x
Altman Z-score 7.18 1.78 -1.06

Shareholder Returns

7 metrics
MetricCALXEXTRRBBN
Dividend yield – – –
Net buyback yield 8.1% 2.9% 3.2%
Shareholder yield 8.1% 2.9% 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.

ConsensusCALXEXTRRBBN
Forward P/E 23.3xFY2026 16.4xFY2027 26.8xFY2026
EPS, next fiscal year $1.62FY2026 $1.38FY2027 $0.05FY2026
EPS growth, next FY +20.9%FY2026 +30.2%FY2027 -92.4%FY2026
EPS growth, the year after +48.1% +2.9% +200.0%
Revenue, next fiscal year $1.11BFY2026 $1.34BFY2027 $790.52MFY2026
Revenue growth, next FY +11.0%FY2026 +4.5%FY2027 -6.4%FY2026
Revenue growth, the year after +18.8% +21.3% +11.9%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersCALXEXTRRBBN
Held by institutions 94.5% 96.7% 71.8%
Institutions holding 288 338 161
Change in shares held, QoQ +0.5% +1.2% -0.7%
Institutions buying 148 181 88
Institutions selling 111 121 41
Buyers to sellers 1.33 1.50 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.

CALXEXTRRBBN
CALX 1.00 0.29 0.13
EXTR 0.29 1.00 0.20
RBBN 0.13 0.20 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, CALX, EXTR and RBBN?

Extreme Networks (EXTR) is the largest by market capitalisation: Calix (CALX) $2.43B, Extreme Networks (EXTR) $3.17B, Ribbon Communications (RBBN) $247.27M.

Which stock is cheaper, CALX, EXTR and RBBN?

Ribbon Communications (RBBN) trades on the lowest price-to-earnings ratio (Calix (CALX) 47.5x, Extreme Networks (EXTR) 75.2x, Ribbon Communications (RBBN) 15.9x). On next year's consensus earnings, Extreme Networks (EXTR) is cheapest (Calix (CALX) 23.3x, Extreme Networks (EXTR) 16.4x, 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%, Extreme Networks (EXTR) +12.6%, Ribbon Communications (RBBN) -7.6%.

Which company is more profitable?

Calix (CALX) has the highest net margin (Calix (CALX) 4.6%, Extreme Networks (EXTR) 3.3%, Ribbon Communications (RBBN) 2.0%). On return on invested capital, Extreme Networks (EXTR) leads (Extreme Networks (EXTR) 19.4%, Ribbon Communications (RBBN) 0.0%).

Which stock has performed better?

Over the past year Extreme Networks (EXTR) returned the most: Calix (CALX) -38.5%, Extreme Networks (EXTR) +8.7%, Ribbon Communications (RBBN) -62.3%. Over five years, Extreme Networks (EXTR) compounded fastest (Calix (CALX) -8.5%/yr, Extreme Networks (EXTR) +18.6%/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%, Extreme Networks (EXTR) 55.5%, Ribbon Communications (RBBN) 67.4%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, CALX, EXTR 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, Extreme Networks (EXTR) leads on 6. 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.