RBBN vs CIEN vs EXTR Stock Comparison

Ribbon Communications, Ciena and Extreme Networks Prices as of Nov 5, 2026 Peers: Industry group
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CIEN Ciena Corp
$230.72 -48.0% 1M +17.8% 1Y
Market cap
$35.54B
P/E
54.3x
Revenue (TTM)
$6.02B
Div. yield
–
Networking Equipment Technology
4 wins
EXTR Extreme Networks Inc
$21.05 -14.2% 1M +19.3% 1Y
Market cap
$3.29B
P/E
62.6x
Revenue (TTM)
$1.31B
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, Ciena 4, Ribbon Communications 1). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionRBBNCIENEXTRLeader
Larger companyMarket capitalisation $254.88M $35.54B $3.29B CIEN
Cheaper on earningsLower P/E, profitable companies only 13.7x 54.3x 62.6x RBBN
Cheaper on forward earningsLower price / next fiscal year consensus EPS — 30.4x 14.5x EXTR
Faster revenue growthRevenue growth, trailing twelve months -7.8% +32.6% +11.3% CIEN
More profitableNet margin, trailing twelve months 2.3% 10.9% 4.0% CIEN
Better return on capitalReturn on invested capital 0.0% 12.4% 23.5% EXTR
Less leveragedLower net debt / EBITDA 9.4x 0.7x -0.4x EXTR
Higher dividend yieldTrailing dividend yield 0.00% 0.00% 0.00% –
Better 1-year returnPrice return, last 12 months -57.1% +17.8% +19.3% EXTR
Better 5-year returnAnnualised price return, 5 years -25.6%/yr +30.7%/yr +12.8%/yr CIEN
Less volatileAnnualised volatility, 1 year 70.2% 81.6% 53.5% EXTR
Higher overall scoreMean of the five percentile scores vs peers 40/100 55/100 56/100 EXTR

Percentile Scorecard

RBBNCIENEXTR

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

AxisRBBNCIENEXTR
Valuation 63 #42 of 112 23 #87 of 112 46 #61 of 112
Growth 15 #92 of 108 94 #8 of 108 45 #60 of 108
Profitability 31 #72 of 104 82 #20 of 104 76 #26 of 104
Financial Health 17 #97 of 116 44 #65 of 116 23 #90 of 116
Shareholder Returns 72 #24 of 83 32 #57 of 83 89 #10 of 83
Overall 40 55 56
  • RBBN ranked among 121 companies in Computer Hardware
  • CIEN ranked among 121 companies in Computer Hardware
  • EXTR ranked among 121 companies in Computer Hardware

Price Performance

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

Returns

PeriodRBBNCIENEXTRSPY
1 month -22.0%-48.0%-14.2% -5.9%
3 months -34.3%-42.8%-13.4% -4.6%
6 months -48.7%-57.2%-10.5% +0.2%
Year to date -52.1%-1.3%+26.4% +7.5%
1 year -57.1%+17.8%+19.3% +8.2%
3 years -34.6%+433.8%+23.9% +68.3%
3 years, per year -13.2%+74.8%+7.4% +19.0%
5 years -77.2%+281.4%+82.9% +56.5%
5 years, per year -25.6%+30.7%+12.8% +9.4%
10 years -75.2%+1,098.5%+388.4% +251.5%
10 years, per year -13.0%+28.2%+17.2% +13.4%

Risk

MeasureRBBNCIENEXTRSPY
Volatility, 1Y 70.2%81.6%53.5% 13.6%
Downside volatility, 1Y 80.4%89.5%52.5% 14.2%
Beta vs S&P 500, 1Y 1.382.851.60 1.00
Return / volatility, 1Y -0.810.220.36 0.60
Max drawdown, 5Y -78.9%-63.2%-67.2% -25.4%
From 52-week high -58.7%-63.2%-37.6% -5.9%
52-week high $3.34$627.00$33.71 $779.14
52-week low $1.32$176.45$13.74 $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.

MultipleRBBNCIENEXTR
P/E now vs peer median 13.3xmedian 25.2x 50.1xmedian 25.2x 52.7xmedian 25.2x
P/S now vs peer median 0.3xmedian 2.4x 5.4xmedian 2.4x 2.1xmedian 2.4x
EV/EBITDA now vs peer median 17.1xmedian 16.2x 37.1xmedian 16.2x 27.3xmedian 16.2x
P/FCF now vs peer median -8.5xmedian 23.4x 40.2xmedian 23.4x 18.0xmedian 23.4x
P/B now vs peer median 0.6xmedian 2.3x 10.7xmedian 2.3x 31.6xmedian 2.3x
PEG now vs peer median 0.41median 0.98 1.12median 0.98 -2.94median 0.98

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 monthsRBBNCIENEXTR
Revenue $800.98M $6.02B $1.31B
Gross profit $386.62M $2.65B $813.05M
Operating income -$29.02M $738.95M $74.49M
Net income $18.59M $654.41M $52.49M
Free cash flow -$29.11M $814.36M $154.76M
R&D $178.44M $924.94M $233.95M
EPS (diluted) $0.10 $4.48 $0.39
Cash & equivalents $40.38M $2.45B $244.52M
Total debt $342.88M $3.23B $200.00M
Shares (diluted) 178.86M 145.97M 134.68M
Enterprise value $7.02M $29.10B $2.40B

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
MetricRBBNCIENEXTR
P/E 13.3x 50.1x 52.7x
P/FCF -8.5x 40.2x 18.0x
P/Operating cash flow -13.2x 31.0x 15.2x
P/S 0.3x 5.4x 2.1x
P/B 0.6x 10.7x 31.6x
P/Tangible book 0.9x 11.4x 32.6x
EV/EBITDA 17.1x 37.1x 27.3x
EV/EBIT -18.9x 45.1x 36.8x
EV/Revenue 0.7x 5.5x 2.1x
EV/FCF -18.9x 40.9x 17.7x
EV/Operating cash flow -29.4x 31.6x 15.0x
PEG (3Y EPS CAGR) 0.41 1.12 -2.94

Growth

14 metrics
MetricRBBNCIENEXTR
Revenue growth (1Y) -7.8% 32.6% 11.3%
Revenue CAGR (3Y) -1.3% 12.5% -1.3%
Gross profit growth (1Y) -12.1% 40.6% 11.7%
Gross profit CAGR (3Y) -1.2% 13.3% 0.5%
Operating income growth (1Y) -240.9% 200.1% 126.0%
Operating income CAGR (3Y) 9.9% 29.1% -16.3%
Net income growth (1Y) 143.2% 364.5% 506.9%
Net income CAGR (3Y) 33.0% 43.5% -17.7%
EPS growth (1Y) 142.6% 359.9% 508.7%
EPS CAGR (3Y) 32.7% 44.8% -18.0%
Operating cash flow growth (1Y) -122.3% 34.5% 52.9%
Operating cash flow CAGR (3Y) -50.8% 201.2% -12.8%
Free cash flow growth (1Y) -155.4% 34.5% 63.2%
Free cash flow CAGR (3Y) -90.6% 95.4% -15.9%

Profitability

14 metrics
MetricRBBNCIENEXTR
Gross margin 48.3% 44.1% 61.9%
EBITDA margin 4.0% 14.9% 7.6%
Operating margin -3.6% 12.3% 5.7%
Pretax margin -8.9% 12.1% 4.7%
Net margin 2.3% 10.9% 4.0%
FCF margin -3.6% 13.5% 11.8%
Operating cash flow margin -2.3% 17.5% 13.9%
Return on equity 4.8% 22.0% 59.4%
Return on assets 1.6% 9.3% 4.2%
Return on invested capital 0.0% 12.4% 23.5%
Return on capital employed -3.5% 13.1% 12.8%
Asset turnover 0.7x 0.9x 1.1x
Cash conversion (OCF / net income) -1.0x 1.6x 3.5x
Stock comp / revenue 2.7% 3.5% 6.7%

Financial Health

11 metrics
MetricRBBNCIENEXTR
Debt / assets 29.8% 40.4% 15.4%
Debt / equity 0.9x 1.1x 2.3x
Net debt / EBITDA 9.4x 0.7x -0.4x
Debt / FCF -11.8x 4.0x 1.3x
Liabilities / assets 66.2% 61.8% 93.2%
Equity / assets 33.8% 38.2% 6.8%
Interest coverage – 10.6x 4.9x
Current ratio 1.3x 3.8x 1.0x
Quick ratio 1.1x 2.8x 0.6x
Cash ratio 0.1x 1.9x 0.4x
Altman Z-score -1.04 5.17 1.63

Shareholder Returns

7 metrics
MetricRBBNCIENEXTR
Dividend yield – – –
Net buyback yield 1.7% -1.5% 3.6%
Shareholder yield 1.7% -1.5% 3.6%
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.

ConsensusRBBNCIENEXTR
Forward P/E – 30.4xFY2026 14.5xFY2027
EPS, next fiscal year $-0.01FY2026 $7.60FY2026 $1.45FY2027
EPS growth, next FY -101.5%FY2026 +187.9%FY2026 +36.8%FY2027
EPS growth, the year after – +64.7% +0.7%
Revenue, next fiscal year $769.95MFY2026 $6.86BFY2026 $1.36BFY2027
Revenue growth, next FY -8.8%FY2026 +43.8%FY2026 +6.0%FY2027
Revenue growth, the year after +14.1% +18.0% +22.0%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersRBBNCIENEXTR
Held by institutions 71.8% 93.0% 96.7%
Institutions holding 161 1,224 339
Change in shares held, QoQ -0.7% -1.7% +1.2%
Institutions buying 88 733 182
Institutions selling 41 379 121
Buyers to sellers 2.15 1.93 1.50

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.

RBBNCIENEXTR
RBBN 1.00 0.26 0.23
CIEN 0.26 1.00 0.34
EXTR 0.23 0.34 1.00

Add a Peer

Largest companies in the same industry

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Frequently Asked Questions

Which is bigger, RBBN, CIEN and EXTR?

Ciena (CIEN) is the largest by market capitalisation: Ribbon Communications (RBBN) $254.88M, Ciena (CIEN) $35.54B, Extreme Networks (EXTR) $3.29B.

Which stock is cheaper, RBBN, CIEN and EXTR?

Ribbon Communications (RBBN) trades on the lowest price-to-earnings ratio (Ribbon Communications (RBBN) 13.7x, Ciena (CIEN) 54.3x, Extreme Networks (EXTR) 62.6x). On next year's consensus earnings, Extreme Networks (EXTR) is cheapest (Ciena (CIEN) 30.4x, Extreme Networks (EXTR) 14.5x). A lower multiple can reflect slower expected growth, so read it next to the growth figures.

Which company is growing faster?

Ciena (CIEN) grew revenue fastest over the trailing twelve months: Ribbon Communications (RBBN) -7.8%, Ciena (CIEN) +32.6%, Extreme Networks (EXTR) +11.3%.

Which company is more profitable?

Ciena (CIEN) has the highest net margin (Ribbon Communications (RBBN) 2.3%, Ciena (CIEN) 10.9%, Extreme Networks (EXTR) 4.0%). On return on invested capital, Extreme Networks (EXTR) leads (Ribbon Communications (RBBN) 0.0%, Ciena (CIEN) 12.4%, Extreme Networks (EXTR) 23.5%).

Which stock has performed better?

Over the past year Extreme Networks (EXTR) returned the most: Ribbon Communications (RBBN) -57.1%, Ciena (CIEN) +17.8%, Extreme Networks (EXTR) +19.3%. Over five years, Ciena (CIEN) compounded fastest (Ribbon Communications (RBBN) -25.6%/yr, Ciena (CIEN) +30.7%/yr, Extreme Networks (EXTR) +12.8%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Extreme Networks (EXTR) has been the steadiest (Ribbon Communications (RBBN) 70.2%, Ciena (CIEN) 81.6%, Extreme Networks (EXTR) 53.5%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, RBBN, CIEN and EXTR?

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.