AAOI
Applied Optoelectronics, Inc.
AAOI offers stronger modeled upside, but that advantage does not outweigh its weaker overall profile.
DGII
Digi International Inc.
DGII has the edge over AAOI overall, supported by lower modeled downside and stronger fundamentals.
AAOI Fundamentals
| Metric | Status |
|---|---|
| Strong | |
| Under pressure | |
| Weak | |
| Unavailable |
AAOI's revenue is currently strong, but its profitability and cash flow are under pressure. There isn't enough data to rate its balance sheet.
DGII Fundamentals
| Metric | Status |
|---|---|
| Healthy | |
| Healthy | |
| Strong | |
| Healthy |
DGII's revenue, profitability, cash flow and balance sheet are all currently healthy.
AAOI PE Valuation
AAOI has no meaningful PE right now: it lost money over the past year. If it returns to profit as analysts expect, today's price would be 18x next year's earnings.
DGII PE Valuation
| Level | PE | Price | Vs current |
|---|---|---|---|
| Forward | 18x | $58.44 | — |
| Cheap | 38x | $52.34 | -10% |
| Current | 42x | $58.44 | — |
| Fair | 58x | $80.00 | +37% |
| Expensive | 71x | $97.42 | +67% |
Historical ranges are pointers, not guarantees.
DGII's PE is 42x, but its earnings don't support one, so it isn't a reliable read right now.
AAOI Forward outlook
| Metric | Outlook |
|---|---|
| -- | |
| Returning to profit | |
| Strong growth | |
| Strongly improving | |
| Limited | |
| Low |
Analysts expect AAOI to return to profit, with revenue growing. However, they disagree widely on these estimates.
DGII Forward outlook
| Metric | Outlook |
|---|---|
| Strongly improving | |
| Strong growth | |
| Growth | |
| Improving | |
| Limited | |
| Moderate |
Analysts expect earnings and revenue growth for DGII, with profitability improving.
AAOI Earnings Per Share
| Quarter | TTM EPS | YoY |
|---|---|---|
| Forward | $2.98 | — |
| Q3 2026 | -$0.42 | +$3.02 |
| Q2 2026 | -$0.77 | +$2.81 |
| Q1 2026 | -$0.65 | +$3.43 |
| Q4 2025 | -$0.64 | +$3.86 |
| Q3 2025 | -$3.44 | -$1.41 |
| Q2 2025 | -$3.58 | -$1.70 |
| Q1 2025 | -$4.08 | -$2.29 |
| Q4 2024 | -$4.50 | -$2.75 |
AAOI is still losing money, but far less than before: $0.42 per share over the past year, against $4.50 at its worst in late 2024.
DGII Earnings Per Share
| Quarter | TTM EPS | YoY |
|---|---|---|
| Forward | $3.17 | +130% |
| Q3 2026 | $1.38 | +28% |
DGII has the edge over AAOI in the latest year-over-year earnings comparison.
AAOI Quarterly Revenue
| Quarter | Revenue | YoY |
|---|---|---|
| Q3 2026 | $269.9M | +127% |
| Q2 2026 | $191.9M | +86% |
| Q1 2026 | $151.1M | +51% |
| Q4 2025 | $134.3M | +34% |
| Q3 2025 | $118.6M | +82% |
| Q2 2025 | $103M | +138% |
| Q1 2025 | $99.9M | +146% |
| Q4 2024 | $100.3M | +66% |
AAOI has the edge over DGII on sales, with stronger typical year-over-year growth.
| Quarter | Margin | YoY |
|---|---|---|
| Q3 2026 | -0.5% | +15 points |
| Q2 2026 | -13% | +2.6 points |
| Q1 2026 | -8.6% | +0.3 points |
| Q4 2025 | -8.6% | -2.1 points |
| Q3 2025 | -15% | +10 points |
| Q2 2025 | -16% | +45 points |
| Q1 2025 | -8.9% | +44 points |
| Q4 2024 | -6.5% | +1 points |
AAOI's operating margin was −0.5% last quarter, up 15 points from the same quarter a year ago, near the top of its range since 2019.
DGII Quarterly Revenue
| Quarter | Revenue | YoY |
|---|---|---|
| Q3 2026 | $143.3M | +25% |
| Q2 2026 | $138.7M | +29% |
| Q1 2026 | $130.7M | +25% |
| Q4 2025 | $122.5M | +18% |
DGII's revenue has grown year over year every quarter since late 2025: $143M last quarter, up 25% from the same quarter a year ago.
| Quarter | Margin | YoY |
|---|---|---|
| Q2 2026 | 17% | +2.6 points |
| Q1 2026 | 13% | -0.1 points |
| Q4 2025 | 13% | +0.5 points |
| Q3 2025 | 12% | N/A |
| Q2 2025 | 14% | N/A |
| Q1 2025 | 13% | N/A |
| Q4 2024 | 13% | N/A |
DGII has the edge over AAOI on profitability, with a higher operating margin.
AAOI Free Cash Flow
| Quarter | Free cash flow | YoY |
|---|---|---|
| Q3 2026 | -$369.9M | -$291.2M |
| Q2 2026 | -$265.3M | -$174.4M |
| Q1 2026 | -$143.6M | -$64.3M |
| Q4 2025 | -$104.6M | -$51.6M |
| Q3 2025 | -$78.7M | -$58M |
| Q2 2025 | -$91M | -$86M |
| Q1 2025 | -$79.3M | -$45.1M |
| Q4 2024 | -$53M | -$48.4M |
AAOI has burned cash in almost every quarter: −$883M over the past year, against −$302M the year before.
DGII Free Cash Flow
| Quarter | Free cash flow | YoY |
|---|---|---|
| Q2 2026 | $32.5M | +41% |
| Q1 2026 | $40.8M | +59% |
| Q4 2025 | $35.2M | +21% |
DGII and AAOI do not have enough comparable growth data to identify a winner.
AAOI Total Shares
| Period | Change % | Net change |
|---|---|---|
| Quarterly | +7.7% | +6.3M shares |
| 1 year | +39% | +24.5M shares |
| 3 years | +168% | +55.1M shares |
| 5 years | +224% | +60.7M shares |
| Available history | +340% | +67.9M shares |
AAOI has 88M diluted shares, up 39% from a year ago.
DGII Total Shares
| Period | Change % | Net change |
|---|---|---|
| Quarterly | +1.1% | +437K shares |
| 1 year | +3.4% | +1.3M shares |
DGII has the edge over AAOI on shareholder dilution, with a more favorable share count trend.
| Quarter | Spent |
|---|---|
| Q2 2026 | $4.5M |
| Q1 2026 | $252,000 |
| Q4 2025 | $6.6M |
| Q3 2025 | $133,000 |
| Q2 2025 | $169,000 |
| Q1 2025 | $2M |
| Q4 2024 | $4.5M |
DGII spent $11M buying back its own shares over the past year.
AAOI Net Leverage
AAOI's operating earnings (EBITDA) were negative over the past year, so its debt can't be measured against them.
DGII Net Leverage
| Quarter | Net Leverage | Status |
|---|---|---|
| Q2 2026 | 1.0x | Very low |
| Q1 2026 | 1.5x | Healthy |
| Q4 2025 | 1.5x | Healthy |
| Q3 2025 | 2.0x | Moderate |
| Q2 2025 | 0.3x | Very low |
| Q1 2025 | 0.7x | Very low |
| Q4 2024 | 1.1x | Healthy |
DGII's net debt is about a year of its operating earnings (EBITDA).
AAOI Weekly Momentum
| Metric | Value | Status |
|---|---|---|
| RSI | 35.1 | Neutral |
| Stochastic | 4.8 | Oversold |
AAOI's weekly RSI is 35 (neutral) and its Stochastic is 5 (oversold).
DGII Weekly Momentum
| Metric | Value | Status |
|---|---|---|
| RSI | 40.9 | Neutral |
| Stochastic | 20.9 | Neutral |
DGII's weekly RSI is 41 (neutral) and its Stochastic is 21 (neutral).
AAOI PE vs Technology Sector
AAOI has no meaningful PE right now: it lost money over the past year.
DGII PE vs Technology Sector
| Metric | DGII | Sector median | Relative |
|---|---|---|---|
| PE | 42x | 28x | 52% above |
| PE % | 23 | 35 | 12 pts below |
DGII is trading at 42x earnings, a 52% premium to the Technology sector's median of 28x, though its earnings don't support one.
AAOI Weekly Moving Averages
| Moving average | MA price | Relative |
|---|---|---|
| 8 week MA | $80.2 | 34% below |
| 20 week MA | $100.6 | 47% below |
| 50 week MA | $100.3 | 47% below |
| 100 week MA | $62.3 | 15% below |
| 200 week MA | $36.9 | 43% above |
AAOI has fallen below most of its moving averages, though it's still 43% above its 200-week average.
DGII Weekly Moving Averages
| Moving average | MA price | Relative |
|---|---|---|
| 8 week MA | $71.1 | 18% below |
| 20 week MA | $71.9 | 19% below |
| 50 week MA | $60.4 | 3.3% below |
| 100 week MA | $46.7 | 25% above |
| 200 week MA | $38.3 | 53% above |
DGII has the edge over AAOI on trend strength, trading above more of its moving averages.
AAOI Yearly ROI
| Year | Start price | End price | ROI |
|---|---|---|---|
| 2020 | $11.5 | $8.77 | -24% |
| 2021 | $8.77 | $5.64 | -36% |
| 2022 | $5.64 | $1.95 | -65% |
| 2023 | $1.95 | $19.3 | +891% |
| 2024 | $19.3 | $37.7 | +95% |
| 2025 | $37.7 | $37.2 | -1.5% |
| 2026 YTD | $37.2 | $52.9 | +42% |
AAOI has the edge over DGII on returns for 2026, with the stronger performance.
DGII Yearly ROI
| Year | Start price | End price | ROI |
|---|---|---|---|
| 2020 | $17.4 | $19.7 | +13% |
| 2021 | $19.7 | $24.8 | +26% |
| 2022 | $24.8 | $37.2 | +50% |
| 2023 | $37.2 | $26.0 | -30% |
| 2024 | $26.0 | $30.4 | +17% |
| 2025 | $30.4 | $44.5 | +46% |
| 2026 YTD | $44.5 | $58.4 | +31% |
DGII has finished higher in five of the last six years. It's up 31% so far in 2026.