AAOI
Applied Optoelectronics, Inc.
AAOI offers stronger fundamentals, but that advantage does not outweigh its weaker overall profile.
TDC
Teradata Corporation
TDC has a slight edge over AAOI overall, supported by lower modeled downside and stronger valuation.
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.
TDC Fundamentals
| Metric | Status |
|---|---|
| Stable | |
| Stable | |
| Strong | |
| Strong |
TDC's cash flow and balance sheet are currently strong, and its revenue and profitability are 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.
TDC PE Valuation
| Level | PE | Price | Vs current |
|---|---|---|---|
| Current | 7.2x | $34.18 | — |
| Forward | 12x | $34.18 | — |
| Cheap | 18x | $85.47 | +150% |
| Fair | 38x | $181 | +430% |
| Expensive | 79x | $373 | +990% |
Historical ranges are pointers, not guarantees.
TDC's PE is in its cheap range at 7.2x, but its recent earnings include one-off gains. On analysts' estimates for next year's earnings, today's price would be 12x.
AAOI Forward outlook
| Metric | Outlook |
|---|---|
| -- | |
| Returning to profit | |
| Strong growth | |
| Strongly improving | |
| Limited | |
| Low |
AAOI has the edge over TDC on the outlook, with more favorable revenue expectations.
TDC Forward outlook
| Metric | Outlook |
|---|---|
| Strongly deteriorating | |
| Growth | |
| Stable | |
| Strongly improving | |
| Limited | |
| High |
Analysts expect TDC's earnings to grow and its profitability to improve, with its revenue holding steady.
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.
TDC Earnings Per Share
| Quarter | TTM EPS | YoY |
|---|---|---|
| Forward | $2.91 | -39% |
| Q3 2026 | $4.74 | +292% |
| Q2 2026 | $4.76 | +325% |
| Q1 2026 | $4.37 | +210% |
| Q4 2025 | $1.35 | +16% |
| Q3 2025 | $1.21 | +44% |
| Q2 2025 | $1.12 | +78% |
| Q1 2025 | $1.41 | +236% |
| Q4 2024 | $1.16 | +90% |
TDC 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 TDC 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.
TDC Quarterly Revenue
| Quarter | Revenue | YoY |
|---|---|---|
| Q3 2026 | $399M | -4.1% |
| Q2 2026 | $410M | +0.5% |
| Q1 2026 | $444M | +6.2% |
| Q4 2025 | $421M | +2.9% |
| Q3 2025 | $416M | -5.5% |
| Q2 2025 | $408M | -6.4% |
| Q1 2025 | $418M | -10% |
| Q4 2024 | $409M | -11% |
TDC's revenue fell from its 2022 peak and has held roughly level since: $399M last quarter, down 4.1% from the same quarter a year ago.
| Quarter | Margin | YoY |
|---|---|---|
| Q3 2026 | 14% | -1.1 points |
| Q2 2026 | 12% | +5.8 points |
| Q1 2026 | -8.1% | -24 points |
| Q4 2025 | 13% | +3.3 points |
| Q3 2025 | 15% | +1.9 points |
| Q2 2025 | 5.9% | -9.3 points |
| Q1 2025 | 16% | +5.5 points |
| Q4 2024 | 9.5% | -0.7 points |
TDC 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.
TDC Free Cash Flow
| Quarter | Free cash flow | YoY |
|---|---|---|
| Q3 2026 | $86M | -3.4% |
| Q2 2026 | $105M | +169% |
| Q1 2026 | $391M | +5486% |
| Q4 2025 | $151M | +1.3% |
| Q3 2025 | $89M | +29% |
| Q2 2025 | $39M | -2.5% |
| Q1 2025 | $7M | -67% |
| Q4 2024 | $149M | -11% |
TDC 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.
TDC Total Shares
| Period | Change % | Net change |
|---|---|---|
| Quarterly | -0.7% | -700K shares |
| 1 year | 0% | -- |
| 3 years | -6.4% | -6.5M shares |
| 5 years | -16% | -17.9M shares |
| Available history | -16% | -18.7M shares |
TDC has the edge over AAOI on shareholder dilution, with a more favorable share count trend.
| Quarter | Spent |
|---|---|
| Q3 2026 | $57M |
| Q2 2026 | $40M |
| Q1 2026 | $34M |
| Q4 2025 | $38M |
| Q3 2025 | $30M |
| Q2 2025 | $28M |
| Q1 2025 | $44M |
| Q4 2024 | $29M |
TDC spent $169M buying back its own shares over the past year, up 29% 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.
TDC Net Leverage
| Quarter | Net Leverage | Status |
|---|---|---|
| Q3 2026 | -2.0x | Net Cash |
| Q2 2026 | -1.9x | Net Cash |
| Q1 2026 | -1.9x | Net Cash |
| Q4 2025 | -0.1x | Net Cash |
| Q3 2025 | 0.2x | Very low |
| Q2 2025 | 0.4x | Very low |
| Q1 2025 | 0.3x | Very low |
| Q4 2024 | 0.2x | Very low |
TDC has more cash than debt.
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).
TDC Weekly Momentum
| Metric | Value | Status |
|---|---|---|
| RSI | 59.3 | Neutral |
| Stochastic | 80.4 | Overbought |
TDC's weekly RSI is 59 (neutral) and its Stochastic is 80 (overbought).
AAOI PE vs Technology Sector
AAOI has no meaningful PE right now: it lost money over the past year.
TDC PE vs Technology Sector
| Metric | TDC | Sector median | Relative |
|---|---|---|---|
| PE | 7.2x | 28x | 74% below |
| PE % | 5 | 35 | 30 pts below |
TDC is trading at 7.2x earnings, a 74% discount to the Technology sector's median of 28x, though its recent earnings include one-off gains.
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.
TDC Weekly Moving Averages
| Moving average | MA price | Relative |
|---|---|---|
| 8 week MA | $31.9 | 7.2% above |
| 20 week MA | $30.5 | 12% above |
| 50 week MA | $30.1 | 13% above |
| 100 week MA | $27.0 | 27% above |
| 200 week MA | $33.3 | 2.7% above |
TDC 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 TDC on returns for 2026, with the stronger performance.
TDC Yearly ROI
| Year | Start price | End price | ROI |
|---|---|---|---|
| 2020 | $26.6 | $22.4 | -16% |
| 2021 | $22.4 | $44.1 | +97% |
| 2022 | $44.1 | $33.2 | -25% |
| 2023 | $33.2 | $43.5 | +31% |
| 2024 | $43.5 | $31.6 | -27% |
| 2025 | $31.6 | $30.7 | -3% |
| 2026 YTD | $30.7 | $34.2 | +11% |
TDC has finished lower in four of the last six years. It's up 11% so far in 2026.