AAOI
Applied Optoelectronics, Inc.
AAOI offers stronger valuation, but that advantage does not outweigh its weaker overall profile.
CAT
Caterpillar Inc.
CAT has the edge over AAOI overall, supported by lower modeled downside and stronger modeled upside.
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.
CAT Fundamentals
| Metric | Status |
|---|---|
| Healthy | |
| Strong | |
| Strong | |
| Strong |
CAT'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.
CAT PE Valuation
| Level | PE | Price | Vs current |
|---|---|---|---|
| Cheap | 15x | $380 | -37% |
| Fair | 18x | $461 | -24% |
| Forward | 20x | $605 | — |
| Current | 24x | $605 | — |
| Expensive | 33x | $840 | +39% |
Historical ranges are pointers, not guarantees.
CAT's PE is in its expensive range at 24x. If earnings grow as analysts expect, today's price would be 20x next year's earnings, in its fair 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.
CAT Forward outlook
| Metric | Outlook |
|---|---|
| Improving | |
| Strong growth | |
| Growth | |
| Strongly improving | |
| Moderate | |
| Low |
Analysts expect earnings and revenue growth for CAT, 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.
CAT Earnings Per Share
| Quarter | TTM EPS | YoY |
|---|---|---|
| Forward | $30.32 | +19% |
| Q3 2026 | $25.48 | +31% |
| Q2 2026 | $23.23 | +18% |
| Q1 2026 | $20.08 | -2% |
| Q4 2025 | $18.81 | -15% |
| Q3 2025 | $19.46 | -9.7% |
| Q2 2025 | $19.64 | -10% |
| Q1 2025 | $20.50 | -7.4% |
| Q4 2024 | $22.05 | +9.6% |
CAT 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 CAT 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.
CAT Quarterly Revenue
| Quarter | Revenue | YoY |
|---|---|---|
| Q3 2026 | $20.7B | +17% |
| Q2 2026 | $20.5B | +24% |
| Q1 2026 | $17.4B | +22% |
| Q4 2025 | $19.1B | +18% |
| Q3 2025 | $17.6B | +9.5% |
| Q2 2025 | $16.6B | -0.7% |
| Q1 2025 | $14.2B | -9.8% |
| Q4 2024 | $16.2B | -5% |
CAT's revenue has grown year over year for five quarters in a row: $20.7B last quarter, up 17% from the same quarter a year ago.
| Quarter | Margin | YoY |
|---|---|---|
| Q3 2026 | 20% | +3.1 points |
| Q2 2026 | 21% | +3.6 points |
| Q1 2026 | 18% | -0.4 points |
| Q4 2025 | 14% | -4.1 points |
| Q3 2025 | 17% | -2.2 points |
| Q2 2025 | 17% | -3.6 points |
| Q1 2025 | 18% | -4.2 points |
| Q4 2024 | 18% | -0.3 points |
CAT 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.
CAT Free Cash Flow
| Quarter | Free cash flow | YoY |
|---|---|---|
| Q3 2026 | $3.7B | +19% |
| Q2 2026 | $3.8B | +47% |
| Q1 2026 | $1.1B | +97% |
| Q4 2025 | $2.7B | +0.1% |
| Q3 2025 | $3.1B | -1.5% |
| Q2 2025 | $2.6B | -4.2% |
| Q1 2025 | $579M | -63% |
| Q4 2024 | $2.7B | -22% |
CAT 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.
CAT Total Shares
| Period | Change % | Net change |
|---|---|---|
| Quarterly | -0.3% | -1.6M shares |
| 1 year | -2.1% | -9.9M shares |
| 3 years | -10% | -51.7M shares |
| 5 years | -16% | -86.7M shares |
| Available history | -19% | -107M shares |
CAT has the edge over AAOI on shareholder dilution, with a more favorable share count trend.
| Quarter | Spent |
|---|---|
| Q3 2026 | $1.2B |
| Q2 2026 | $1.5B |
| Q1 2026 | $5B |
| Q4 2025 | $340M |
| Q3 2025 | $362M |
| Q2 2025 | $828M |
| Q1 2025 | $3.7B |
| Q4 2024 | $640M |
CAT spent $8.1B buying back its own shares over the past year, up 47% 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.
CAT Net Leverage
| Quarter | Net Leverage | Status |
|---|---|---|
| Q3 2026 | -0.5x | Net Cash |
| Q2 2026 | -0.4x | Net Cash |
| Q1 2026 | -0.3x | Net Cash |
| Q4 2025 | 2.0x | Healthy |
| Q3 2025 | -0.6x | Net Cash |
| Q2 2025 | -0.4x | Net Cash |
| Q1 2025 | -0.3x | Net Cash |
| Q4 2024 | 1.6x | Healthy |
CAT 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).
CAT Weekly Momentum
| Metric | Value | Status |
|---|---|---|
| RSI | 32.7 | Neutral |
| Stochastic | 6.7 | Oversold |
CAT's weekly RSI is 33 (neutral) and its Stochastic is 7 (oversold).
AAOI PE vs Technology Sector
AAOI has no meaningful PE right now: it lost money over the past year.
CAT PE vs Industrials Sector
| Metric | CAT | Sector median | Relative |
|---|---|---|---|
| PE | 24x | 24x | 1.3% below |
| PE % | 69 | 58 | 11 pts above |
CAT is trading at 24x earnings, in line with the Industrials sector's median of 24x.
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.
CAT Weekly Moving Averages
| Moving average | MA price | Relative |
|---|---|---|
| 8 week MA | $709.0 | 15% below |
| 20 week MA | $797.0 | 24% below |
| 50 week MA | $771.3 | 22% below |
| 100 week MA | $586.7 | 3.2% above |
| 200 week MA | $443.1 | 37% above |
CAT 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 CAT on returns for 2026, with the stronger performance.
CAT Yearly ROI
| Year | Start price | End price | ROI |
|---|---|---|---|
| 2020 | $148.3 | $179.6 | +21% |
| 2021 | $179.6 | $206.2 | +15% |
| 2022 | $206.2 | $239.9 | +16% |
| 2023 | $239.9 | $295.7 | +23% |
| 2024 | $295.7 | $364.9 | +23% |
| 2025 | $364.9 | $583.0 | +60% |
| 2026 YTD | $583.0 | $605.3 | +3.8% |
CAT has finished every year since 2020 higher, and it's up 3.8% so far in 2026.