AAOI
Applied Optoelectronics, Inc.
AAOI offers stronger valuation, but that advantage does not outweigh its weaker overall profile.
CIEN
Ciena Corporation
CIEN 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.
CIEN Fundamentals
| Metric | Status |
|---|---|
| Strong | |
| Strong | |
| Strong | |
| Healthy |
CIEN'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.
CIEN PE Valuation
| Level | PE | Price | Vs current |
|---|---|---|---|
| Cheap | 21x | $94.56 | -68% |
| Forward | 24x | $294 | — |
| Fair | 32x | $142 | -52% |
| Current | 66x | $294 | — |
| Expensive | 133x | $595 | +103% |
Historical ranges are pointers, not guarantees.
CIEN's PE is in its expensive range at 66x. 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.
CIEN Forward outlook
| Metric | Outlook |
|---|---|
| Strongly improving | |
| Strong growth | |
| Strong growth | |
| Strongly improving | |
| Moderate | |
| Low |
Analysts expect strong earnings and revenue growth for CIEN, with profitability improving. However, they disagree widely on these estimates.
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.
CIEN Earnings Per Share
| Quarter | TTM EPS | YoY |
|---|---|---|
| Forward | $12.01 | +168% |
| Q3 2026 | $4.48 | +357% |
| Q2 2026 | $3.00 | +311% |
| Q1 2026 | $1.57 | +185% |
| Q4 2025 | $0.85 | +47% |
| Q3 2025 | $0.98 | +4.3% |
| Q2 2025 | $0.73 | -30% |
| Q1 2025 | $0.55 | -64% |
| Q4 2024 | $0.58 | -66% |
CIEN 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 CIEN on sales, with more consistent year-over-year improvement.
| 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.
CIEN Quarterly Revenue
| Quarter | Revenue | YoY |
|---|---|---|
| Q3 2026 | $1.7B | +37% |
| Q2 2026 | $1.6B | +40% |
| Q1 2026 | $1.4B | +33% |
| Q4 2025 | $1.4B | +20% |
| Q3 2025 | $1.2B | +29% |
| Q2 2025 | $1.1B | +24% |
| Q1 2025 | $1.1B | +3.3% |
| Q4 2024 | $1.1B | -0.5% |
CIEN's revenue has grown year over year for seven quarters in a row: $1.7B last quarter, up 37% from the same quarter a year ago.
| Quarter | Margin | YoY |
|---|---|---|
| Q3 2026 | 18% | +12 points |
| Q2 2026 | 15% | +12 points |
| Q1 2026 | 13% | +5.8 points |
| Q4 2025 | 0.8% | -4.5 points |
| Q3 2025 | 6% | +3.2 points |
| Q2 2025 | 2.9% | +3.4 points |
| Q1 2025 | 7.5% | -0.6 points |
| Q4 2024 | 5.3% | -2.8 points |
CIEN 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.
CIEN Free Cash Flow
| Quarter | Free cash flow | YoY |
|---|---|---|
| Q3 2026 | $116.3M | -14% |
| Q2 2026 | $218.7M | +71% |
| Q1 2026 | $153.8M | +100% |
| Q4 2025 | $325.6M | +23% |
| Q3 2025 | $134.6M | +$313.6M |
| Q2 2025 | $128.2M | +208% |
| Q1 2025 | $76.8M | -69% |
| Q4 2024 | $265.8M | +54% |
CIEN 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.
CIEN Total Shares
| Period | Change % | Net change |
|---|---|---|
| Quarterly | -0.2% | -347K shares |
| 1 year | +1% | +1.5M shares |
| 3 years | -2.7% | -4M shares |
| 5 years | -6.9% | -10.8M shares |
| Available history | -7.4% | -11.6M shares |
CIEN has the edge over AAOI on shareholder dilution, with a more favorable share count trend.
| Quarter | Spent |
|---|---|
| Q3 2026 | $173M |
| Q2 2026 | $84.4M |
| Q1 2026 | $80.5M |
| Q4 2025 | $84.5M |
| Q3 2025 | $81.8M |
| Q2 2025 | $87M |
| Q1 2025 | $81.2M |
| Q4 2024 | $128.7M |
CIEN spent $422M buying back its own shares over the past year, up 12% 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.
CIEN Net Leverage
| Quarter | Net Leverage | Status |
|---|---|---|
| Q3 2026 | 0.9x | Very low |
| Q2 2026 | 0.7x | Very low |
| Q1 2026 | 0.9x | Very low |
| Q4 2025 | 1.4x | Healthy |
| Q3 2025 | 1.3x | Healthy |
| Q2 2025 | 1.8x | Healthy |
| Q1 2025 | 2.3x | Moderate |
| Q4 2024 | 2.1x | Moderate |
CIEN's net debt is less than a year of its operating earnings (EBITDA), down from 1.3 years 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).
CIEN Weekly Momentum
| Metric | Value | Status |
|---|---|---|
| RSI | 42.5 | Neutral |
| Stochastic | 14.1 | Oversold |
CIEN's weekly RSI is 43 (neutral) and its Stochastic is 14 (oversold).
AAOI PE vs Technology Sector
AAOI has no meaningful PE right now: it lost money over the past year.
CIEN PE vs Technology Sector
| Metric | CIEN | Sector median | Relative |
|---|---|---|---|
| PE | 66x | 28x | 136% above |
| PE % | 70 | 35 | 35 pts above |
CIEN is trading at 66x earnings, a 136% 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.
CIEN Weekly Moving Averages
| Moving average | MA price | Relative |
|---|---|---|
| 8 week MA | $338.6 | 13% below |
| 20 week MA | $368.5 | 20% below |
| 50 week MA | $375.1 | 22% below |
| 100 week MA | $238.4 | 23% above |
| 200 week MA | $144.4 | 104% above |
CIEN 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 CIEN on returns for 2026, with the stronger performance.
CIEN Yearly ROI
| Year | Start price | End price | ROI |
|---|---|---|---|
| 2020 | $42.7 | $53.3 | +25% |
| 2021 | $53.3 | $76.0 | +43% |
| 2022 | $76.0 | $49.3 | -35% |
| 2023 | $49.3 | $45.0 | -8.8% |
| 2024 | $45.0 | $86.7 | +93% |
| 2025 | $86.7 | $241.7 | +179% |
| 2026 YTD | $241.7 | $294.0 | +22% |
CIEN has finished higher in four of the last six years, two of them by more than 50%. It's up 22% so far in 2026.