AAOI
Applied Optoelectronics, Inc.
AAOI has a slight edge over ATEN overall, supported by stronger valuation and stronger modeled upside.
ATEN
A10 Networks, Inc.
ATEN has lower modeled downside risk, despite its lower overall score.
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.
ATEN Fundamentals
| Metric | Status |
|---|---|
| Healthy | |
| Healthy | |
| Strong | |
| Stable |
ATEN's revenue, profitability and cash flow are currently healthy, and its balance sheet is stable.
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.
ATEN PE Valuation
| Level | PE | Price | Vs current |
|---|---|---|---|
| Cheap | 18x | $11.50 | -61% |
| Forward | 24x | $29.30 | — |
| Fair | 26x | $16.77 | -43% |
| Current | 45x | $29.30 | — |
| Expensive | 47x | $30.25 | +3.2% |
Historical ranges are pointers, not guarantees.
ATEN's PE is in its expensive range at 45x. If earnings grow as analysts expect, today's price would be 24x next year's earnings, in its cheap range.
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.
ATEN Forward outlook
| Metric | Outlook |
|---|---|
| Strongly improving | |
| Strong growth | |
| Growth | |
| Improving | |
| Limited | |
| High |
Analysts expect earnings and revenue growth for ATEN, 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.
ATEN Earnings Per Share
| Quarter | TTM EPS | YoY |
|---|---|---|
| Forward | $1.20 | +85% |
| Q3 2026 | $0.65 | -4.4% |
| Q2 2026 | $0.59 | -13% |
| Q1 2026 | $0.61 | -9% |
| Q4 2025 | $0.57 | -15% |
| Q3 2025 | $0.68 | +1.5% |
| Q2 2025 | $0.68 | +15% |
| Q1 2025 | $0.67 | +9.8% |
| Q4 2024 | $0.67 | +26% |
ATEN has the edge over AAOI on earnings quality, reporting a profit while its opponent remains loss making.
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 ATEN 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.
ATEN Quarterly Revenue
| Quarter | Revenue | YoY |
|---|---|---|
| Q3 2026 | $91.5M | +23% |
| Q2 2026 | $80.1M | +15% |
| Q1 2026 | $75M | +13% |
| Q4 2025 | $80.4M | +8.3% |
| Q3 2025 | $74.7M | +12% |
| Q2 2025 | $69.4M | +15% |
| Q1 2025 | $66.1M | +9% |
| Q4 2024 | $74.2M | +5.4% |
ATEN's revenue has grown year over year for nine quarters in a row: $92M last quarter, up 23% from the same quarter a year ago.
| Quarter | Margin | YoY |
|---|---|---|
| Q3 2026 | 20% | +2.6 points |
| Q2 2026 | 11% | -3.6 points |
| Q1 2026 | 17% | +4.1 points |
| Q4 2025 | 19% | -6.1 points |
| Q3 2025 | 17% | +1.7 points |
| Q2 2025 | 15% | +1.7 points |
| Q1 2025 | 13% | +1.4 points |
| Q4 2024 | 25% | -0.8 points |
ATEN 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.
ATEN Free Cash Flow
| Quarter | Free cash flow | YoY |
|---|---|---|
| Q3 2026 | $30.7M | +70% |
| Q2 2026 | $27.5M | +53% |
| Q1 2026 | -$689K | -105% |
| Q4 2025 | $16M | -31% |
| Q3 2025 | $18.1M | +8.5% |
| Q2 2025 | $17.9M | +106% |
| Q1 2025 | $12.7M | -57% |
| Q4 2024 | $23.3M | +$23.7M |
ATEN has the edge over AAOI on cash generation, producing positive trailing cash flow while its opponent burns cash.
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.
ATEN Total Shares
| Period | Change % | Net change |
|---|---|---|
| Quarterly | +0.1% | +51K shares |
| 1 year | +3.6% | +2.7M shares |
| 3 years | -0.1% | -105K shares |
| 5 years | -5.3% | -4.2M shares |
| Available history | -0.5% | -378K shares |
ATEN has the edge over AAOI on shareholder dilution, with a more favorable share count trend.
| Quarter | Spent |
|---|---|
| Q3 2026 | $23M |
| Q2 2026 | $2.4M |
| Q1 2026 | $2.5M |
| Q4 2025 | $6.9M |
| Q3 2025 | $11M |
| Q2 2025 | $3.9M |
| Q1 2025 | $47M |
| Q4 2024 | $5.8M |
ATEN spent $35M buying back its own shares over the past year, down 49% from the year before.
AAOI Net Leverage
AAOI's operating earnings (EBITDA) were negative over the past year, so its debt can't be measured against them.
ATEN Net Leverage
| Quarter | Net Leverage | Status |
|---|---|---|
| Q3 2026 | 2.0x | Healthy |
| Q2 2026 | -0.8x | Net Cash |
| Q1 2026 | 2.4x | Moderate |
| Q4 2025 | 2.4x | Moderate |
| Q3 2025 | 2.1x | Moderate |
| Q2 2025 | -0.6x | Net Cash |
| Q1 2025 | -0.5x | Net Cash |
| Q4 2024 | -1.7x | Net Cash |
ATEN's net debt is about 2.0 years of its operating earnings (EBITDA), about the same as a year ago.
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).
ATEN Weekly Momentum
| Metric | Value | Status |
|---|---|---|
| RSI | 55.7 | Neutral |
| Stochastic | 41.5 | Neutral |
ATEN's weekly RSI is 56 (neutral) and its Stochastic is 41 (neutral).
AAOI PE vs Technology Sector
AAOI has no meaningful PE right now: it lost money over the past year.
ATEN PE vs Technology Sector
| Metric | ATEN | Sector median | Relative |
|---|---|---|---|
| PE | 45x | 28x | 62% above |
| PE % | 80 | 35 | 45 pts above |
ATEN is trading at 45x earnings, a 62% premium to the Technology sector's median of 28x.
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.
ATEN Weekly Moving Averages
| Moving average | MA price | Relative |
|---|---|---|
| 8 week MA | $26.4 | 11% above |
| 20 week MA | $28.3 | 3.5% above |
| 50 week MA | $25.3 | 16% above |
| 100 week MA | $21.7 | 35% above |
| 200 week MA | $17.9 | 64% above |
ATEN 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's yearly returns have swung widely, from +891% in 2023 to −65% in 2022. It's up 42% so far in 2026.
ATEN Yearly ROI
| Year | Start price | End price | ROI |
|---|---|---|---|
| 2020 | $6.86 | $9.96 | +45% |
| 2021 | $9.96 | $16.3 | +63% |
| 2022 | $16.3 | $17.0 | +4.7% |
| 2023 | $17.0 | $13.2 | -23% |
| 2024 | $13.2 | $18.6 | +41% |
| 2025 | $18.6 | $18.1 | -2.7% |
| 2026 YTD | $18.1 | $29.3 | +62% |
ATEN has the edge over AAOI on returns for 2026, with the stronger performance.