AAOI
Applied Optoelectronics, Inc.
AAOI has the edge over ACFN overall, supported by stronger fundamentals and stronger modeled upside.
ACFN
Acorn Energy, Inc.
ACFN 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.
ACFN Fundamentals
| Metric | Status |
|---|---|
| Under pressure | |
| Stable | |
| Stable | |
| Strong |
ACFN's balance sheet is currently strong, and its profitability and cash flow are stable, but its revenue is under pressure.
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.
ACFN PE Valuation
| Level | PE | Price | Vs current |
|---|---|---|---|
| Cheap | 6.8x | $5.98 | -61% |
| Current | 17x | $15.25 | — |
| Fair | 36x | $31.99 | +110% |
| Expensive | 61x | $53.68 | +252% |
Historical ranges are pointers, not guarantees.
ACFN's PE is in its cheap range at 17x.
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.
ACFN Forward outlook
There aren't enough analyst estimates for ACFN to show an outlook.
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.
ACFN Earnings Per Share
| Quarter | TTM EPS | YoY |
|---|---|---|
| Q3 2026 | $0.88 | -67% |
| Q2 2026 | $0.61 | -79% |
| Q1 2026 | $0.77 | -71% |
| Q4 2025 | $0.99 | -61% |
| Q3 2025 | $2.65 | +464% |
| Q2 2025 | $2.84 | +1395% |
| Q1 2025 | $2.67 | +3238% |
| Q4 2024 | $2.51 | +4920% |
ACFN 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 ACFN 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.
ACFN Quarterly Revenue
| Quarter | Revenue | YoY |
|---|---|---|
| Q3 2026 | $2.6M | +4.6% |
| Q2 2026 | $2.5M | -29% |
| Q1 2026 | $2.2M | -28% |
| Q4 2025 | $2.4M | -33% |
| Q3 2025 | $2.5M | -19% |
| Q2 2025 | $3.5M | +55% |
| Q1 2025 | $3.1M | +45% |
| Q4 2024 | $3.5M | +57% |
ACFN's revenue has slid since its 2024 peak: $3M last quarter, up 4.6% from the same quarter a year ago.
| Quarter | Margin | YoY |
|---|---|---|
| Q3 2026 | 7.3% | +0.9 points |
| Q2 2026 | 15% | -12 points |
| Q1 2026 | -5.8% | -25 points |
| Q4 2025 | 12% | -12 points |
| Q3 2025 | 6.4% | -18 points |
| Q2 2025 | 27% | +16 points |
| Q1 2025 | 20% | +16 points |
| Q4 2024 | 24% | +21 points |
ACFN 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.
ACFN Free Cash Flow
| Quarter | Free cash flow | YoY |
|---|---|---|
| Q3 2026 | $999K | +12% |
| Q2 2026 | $224K | -64% |
| Q1 2026 | $53K | -80% |
| Q4 2025 | $295K | +78% |
| Q3 2025 | $895K | +28% |
| Q2 2025 | $629K | +649% |
| Q1 2025 | $271K | +$314K |
| Q4 2024 | $166K | +$460K |
ACFN 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.
ACFN Total Shares
| Period | Change % | Net change |
|---|---|---|
| Quarterly | +0.6% | +15K shares |
| 1 year | 0% | +1K shares |
| 3 years | +0.9% | +23K shares |
| 5 years | +2.9% | +72.9K shares |
ACFN has the edge over AAOI on shareholder dilution, with a more favorable share count trend.
AAOI Net Leverage
AAOI's operating earnings (EBITDA) were negative over the past year, so its debt can't be measured against them.
ACFN Net Leverage
| Quarter | Net Leverage | Status |
|---|---|---|
| Q3 2026 | -5.1x | Net Cash |
| Q2 2026 | -5.5x | Net Cash |
| Q1 2026 | -3.1x | Net Cash |
| Q4 2025 | -2.1x | Net Cash |
| Q3 2025 | -1.6x | Net Cash |
| Q2 2025 | -1.0x | Net Cash |
| Q1 2025 | -1.0x | Net Cash |
| Q4 2024 | -1.1x | Net Cash |
ACFN 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).
ACFN Weekly Momentum
| Metric | Value | Status |
|---|---|---|
| RSI | 38.7 | Neutral |
| Stochastic | 7.8 | Oversold |
ACFN's weekly RSI is 39 (neutral) and its Stochastic is 8 (oversold).
AAOI PE vs Technology Sector
AAOI has no meaningful PE right now: it lost money over the past year.
ACFN PE vs Technology Sector
| Metric | ACFN | Sector median | Relative |
|---|---|---|---|
| PE | 17x | 28x | 38% below |
| PE % | 29 | 35 | 6 pts below |
ACFN is trading at 17x earnings, a 38% discount 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.
ACFN Weekly Moving Averages
| Moving average | MA price | Relative |
|---|---|---|
| 8 week MA | $17.6 | 14% below |
| 20 week MA | $18.7 | 19% below |
| 50 week MA | $18.0 | 15% below |
| 100 week MA | $18.8 | 19% below |
| 200 week MA | $13.3 | 15% above |
ACFN has fallen below most of its moving averages, though it's still 15% above its 200-week average.
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 ACFN on returns for 2026, with the stronger performance.
ACFN Yearly ROI
| Year | Start price | End price | ROI |
|---|---|---|---|
| 2020 | $4.80 | $6.72 | +40% |
| 2021 | $6.72 | $8.96 | +33% |
| 2022 | $8.96 | $5.28 | -41% |
| 2023 | $5.28 | $6.09 | +15% |
| 2024 | $6.09 | $18.2 | +199% |
| 2025 | $18.2 | $15.2 | -16% |
| 2026 YTD | $15.2 | $15.3 | +0.3% |
ACFN's yearly returns have swung widely, from +199% in 2024 to −41% in 2022. It's roughly flat so far in 2026.