AAOI vs EXTR vs DGII Stock Comparison

Applied Optoelectronics, Extreme Networks and Digi International Prices as of Nov 5, 2026 Peers: Industry group
1 more company in this comparison (DOX) Create a free account to keep reading and compare up to 10 companies.
EXTR Extreme Networks Inc
$21.05 -14.2% 1M +19.3% 1Y
Market cap
$2.78B
P/E
52.7x
Revenue (TTM)
$1.31B
Div. yield
–
Networking Equipment Technology
3 wins
DGII Digi International Inc
$62.34 -15.7% 1M +71.9% 1Y
Market cap
$2.37B
P/E
48.3x
Revenue (TTM)
$506.21M
Div. yield
–
Networking Equipment Technology
5 wins

Head to Head

11 decided of 12

Digi International leads on 5 of the 12 questions below (Digi International 5, Applied Optoelectronics 3, Extreme Networks 3). Which ones matter depends on what you are buying for; a cheap multiple and slow growth often come together.

QuestionAAOIEXTRDGIILeader
Larger companyMarket capitalisation $4.26B $2.78B $2.37B AAOI
Cheaper on earningsLower P/E, profitable companies only -122.1x 52.7x 48.3x DGII
Cheaper on forward earningsLower price / next fiscal year consensus EPS 66.0x 14.5x 22.4x EXTR
Faster revenue growthRevenue growth, trailing twelve months +77.2% +11.3% +20.3% AAOI
More profitableNet margin, trailing twelve months -4.4% 4.0% 9.6% DGII
Better return on capitalReturn on invested capital -2.3% 23.5% 6.9% EXTR
Less leveragedLower net debt / EBITDA 68.1x -0.4x 0.7x EXTR
Higher dividend yieldTrailing dividend yield — — — –
Better 1-year returnPrice return, last 12 months +48.8% +19.3% +71.9% DGII
Better 5-year returnAnnualised price return, 5 years +51.6%/yr +12.8%/yr +22.0%/yr AAOI
Less volatileAnnualised volatility, 1 year 141.5% 53.5% 43.9% DGII
Higher overall scoreMean of the five percentile scores vs peers 33/100 56/100 57/100 DGII

Percentile Scorecard

AAOIEXTRDGII

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

AxisAAOIEXTRDGII
Valuation 14 #96 of 112 46 #61 of 112 41 #67 of 112
Growth 64 #40 of 108 45 #60 of 108 66 #37 of 108
Profitability 18 #85 of 104 76 #26 of 104 80 #22 of 104
Financial Health 63 #44 of 116 23 #90 of 116 49 #60 of 116
Shareholder Returns 4 #80 of 83 89 #10 of 83 51 #41 of 83
Overall 33 56 57
  • AAOI ranked among 121 companies in Computer Hardware
  • EXTR ranked among 121 companies in Computer Hardware
  • DGII ranked among 121 companies in Computer Hardware

Price Performance

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

Returns

PeriodAAOIEXTRDGIISPY
1 month -64.0%-14.2%-15.7% -5.9%
3 months -62.3%-13.4%-24.9% -4.6%
6 months -70.2%-10.5%+0.5% +0.2%
Year to date +34.5%+26.4%+44.0% +7.5%
1 year +48.8%+19.3%+71.9% +8.2%
3 years +383.9%+23.9%+149.9% +68.3%
3 years, per year +69.2%+7.4%+35.7% +19.0%
5 years +700.2%+82.9%+169.8% +56.5%
5 years, per year +51.6%+12.8%+22.0% +9.4%
10 years +116.6%+388.4%+556.2% +251.5%
10 years, per year +8.0%+17.2%+20.7% +13.4%

Risk

MeasureAAOIEXTRDGIISPY
Volatility, 1Y 141.5%53.5%43.9% 13.6%
Downside volatility, 1Y 132.3%52.5%45.7% 14.2%
Beta vs S&P 500, 1Y 4.371.601.69 1.00
Return / volatility, 1Y 0.340.361.64 0.60
Max drawdown, 5Y -79.0%-67.2%-48.6% -25.4%
From 52-week high -79.0%-37.6%-26.9% -5.9%
52-week high $223.10$33.71$85.24 $779.14
52-week low $19.49$13.74$35.40 $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.

MultipleAAOIEXTRDGII
P/E now vs peer median -122.1xmedian 25.2x 52.7xmedian 25.2x 48.3xmedian 25.2x
P/S now vs peer median 5.7xmedian 2.4x 2.1xmedian 2.4x 4.7xmedian 2.4x
EV/EBITDA now vs peer median -463.5xmedian 16.2x 27.3xmedian 16.2x 21.7xmedian 16.2x
P/FCF now vs peer median -4.8xmedian 23.4x 18.0xmedian 23.4x 17.4xmedian 23.4x
P/B now vs peer median 1.9xmedian 2.3x 31.6xmedian 2.3x 3.5xmedian 2.3x
PEG now vs peer median -2.91median 0.98 -2.94median 0.98 3.04median 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 monthsAAOIEXTRDGII
Revenue $747.22M $1.31B $506.21M
Gross profit $215.22M $813.05M $323.07M
Operating income -$50.66M $74.49M $70.58M
Net income -$32.78M $52.49M $48.74M
Free cash flow -$883.41M $154.76M $135.98M
R&D $124.46M $233.95M $73.84M
EPS (diluted) $-0.37 $0.39 $1.25
Cash & equivalents $605.41M $244.52M $27.97M
Total debt $59.99M $200.00M $108.13M
Shares (diluted) 87.84M 134.68M 38.92M
Enterprise value $2.51B $1.90B $2.25B

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
MetricAAOIEXTRDGII
P/E -122.1x 52.7x 48.3x
P/FCF -4.8x 18.0x 17.4x
P/Operating cash flow -40.1x 15.2x 17.1x
P/S 5.7x 2.1x 4.7x
P/B 1.9x 31.6x 3.5x
P/Tangible book 1.9x 32.6x 7.4x
EV/EBITDA -463.5x 27.3x 21.7x
EV/EBIT -73.2x 36.8x 34.7x
EV/Revenue 5.0x 2.1x 4.8x
EV/FCF -4.2x 17.7x 18.0x
EV/Operating cash flow -34.9x 15.0x 17.7x
PEG (3Y EPS CAGR) -2.91 -2.94 3.04

Growth

14 metrics
MetricAAOIEXTRDGII
Revenue growth (1Y) 77.2% 11.3% 20.3%
Revenue CAGR (3Y) 50.6% -1.3% 4.9%
Gross profit growth (1Y) 74.0% 11.7% 23.4%
Gross profit CAGR (3Y) 70.3% 0.5% 9.3%
Operating income growth (1Y) -2.2% 126.0% 24.0%
Operating income CAGR (3Y) 2.8% -16.3% 9.7%
Net income growth (1Y) 79.0% 506.9% 14.2%
Net income CAGR (3Y) 19.3% -17.7% 18.0%
EPS growth (1Y) 84.8% 508.7% 10.5%
EPS CAGR (3Y) 41.9% -18.0% 15.9%
Operating cash flow growth (1Y) 37.3% 52.9% 30.1%
Operating cash flow CAGR (3Y) -101.6% -12.8% 59.2%
Free cash flow growth (1Y) -192.6% 63.2% 31.6%
Free cash flow CAGR (3Y) -275.9% -15.9% 60.8%

Profitability

14 metrics
MetricAAOIEXTRDGII
Gross margin 28.8% 61.9% 63.8%
EBITDA margin -1.1% 7.6% 22.3%
Operating margin -6.8% 5.7% 13.9%
Pretax margin -4.9% 4.7% 12.4%
Net margin -4.4% 4.0% 9.6%
FCF margin -118.2% 11.8% 26.9%
Operating cash flow margin -14.2% 13.9% 27.3%
Return on equity -1.7% 59.4% 7.2%
Return on assets -1.2% 4.2% 5.0%
Return on invested capital -2.3% 23.5% 6.9%
Return on capital employed -2.5% 12.8% 8.4%
Asset turnover 0.3x 1.1x 0.5x
Cash conversion (OCF / net income) 3.2x 3.5x 2.8x
Stock comp / revenue 2.4% 6.7% 3.4%

Financial Health

11 metrics
MetricAAOIEXTRDGII
Debt / assets 1.9% 15.4% 11.2%
Debt / equity 0.0x 2.3x 0.2x
Net debt / EBITDA 68.1x -0.4x 0.7x
Debt / FCF -0.1x 1.3x 0.8x
Liabilities / assets 28.5% 93.2% 29.0%
Equity / assets 71.5% 6.8% 71.0%
Interest coverage -13.1x 4.9x 8.9x
Current ratio 2.3x 1.0x 1.1x
Quick ratio 1.5x 0.6x 0.7x
Cash ratio 0.9x 0.4x 0.2x
Altman Z-score 3.15 1.63 6.35

Shareholder Returns

7 metrics
MetricAAOIEXTRDGII
Dividend yield – – –
Net buyback yield -41.5% 3.6% 0.1%
Shareholder yield -41.5% 3.6% 0.1%
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.

ConsensusAAOIEXTRDGII
Forward P/E 66.0xFY2026 14.5xFY2027 22.4xFY2026
EPS, next fiscal year $0.71FY2026 $1.45FY2027 $2.78FY2026
EPS growth, next FY – +36.8%FY2027 +32.4%FY2026
EPS growth, the year after +646.5% +0.7% +9.4%
Revenue, next fiscal year $994.70MFY2026 $1.36BFY2027 $519.66MFY2026
Revenue growth, next FY +118.3%FY2026 +6.0%FY2027 +20.8%FY2026
Revenue growth, the year after +185.6% +22.0% +3.8%

Institutional Ownership

13F filings, quarter ended Jun 30, 2026
HoldersAAOIEXTRDGII
Held by institutions 60.5% 96.7% 100.0%
Institutions holding 482 339 285
Change in shares held, QoQ -3.5% +1.2% +1.6%
Institutions buying 313 182 143
Institutions selling 144 121 105
Buyers to sellers 2.17 1.50 1.36

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.

AAOIEXTRDGII
AAOI 1.00 0.37 0.30
EXTR 0.37 1.00 0.33
DGII 0.30 0.33 1.00

Add a Peer

Largest companies in the same industry

Related Comparisons

Frequently Asked Questions

Which is bigger, AAOI, EXTR and DGII?

Applied Optoelectronics (AAOI) is the largest by market capitalisation: Applied Optoelectronics (AAOI) $4.26B, Extreme Networks (EXTR) $2.78B, Digi International (DGII) $2.37B.

Which stock is cheaper, AAOI, EXTR and DGII?

Digi International (DGII) trades on the lowest price-to-earnings ratio (Applied Optoelectronics (AAOI) -122.1x, Extreme Networks (EXTR) 52.7x, Digi International (DGII) 48.3x). On next year's consensus earnings, Extreme Networks (EXTR) is cheapest (Applied Optoelectronics (AAOI) 66.0x, Extreme Networks (EXTR) 14.5x, Digi International (DGII) 22.4x). 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) +77.2%, Extreme Networks (EXTR) +11.3%, Digi International (DGII) +20.3%.

Which company is more profitable?

Digi International (DGII) has the highest net margin (Applied Optoelectronics (AAOI) -4.4%, Extreme Networks (EXTR) 4.0%, Digi International (DGII) 9.6%). On return on invested capital, Extreme Networks (EXTR) leads (Applied Optoelectronics (AAOI) -2.3%, Extreme Networks (EXTR) 23.5%, Digi International (DGII) 6.9%).

Which stock has performed better?

Over the past year Digi International (DGII) returned the most: Applied Optoelectronics (AAOI) +48.8%, Extreme Networks (EXTR) +19.3%, Digi International (DGII) +71.9%. Over five years, Applied Optoelectronics (AAOI) compounded fastest (Applied Optoelectronics (AAOI) +51.6%/yr, Extreme Networks (EXTR) +12.8%/yr, Digi International (DGII) +22.0%/yr). Returns are price only, before dividends.

Which stock is riskier?

By one-year price volatility, Digi International (DGII) has been the steadiest (Applied Optoelectronics (AAOI) 141.5%, Extreme Networks (EXTR) 53.5%, Digi International (DGII) 43.9%). Volatility measures how widely the price swings, not the risk of the business.

Which is the better stock, AAOI, EXTR and DGII?

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