AAOI
Applied Optoelectronics, Inc.
AAOI offers stronger fundamentals, but that advantage does not outweigh its weaker overall profile.
TSSI
TSS, Inc.
TSSI has the edge over AAOI overall, supported by stronger valuation and lower modeled downside.
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.
TSSI Fundamentals
| Metric | Status |
|---|---|
| Under pressure | |
| Healthy | |
| Under pressure | |
| Strong |
TSSI's profitability and balance sheet are currently healthy, but its revenue and cash flow are 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.
TSSI PE Valuation
| Level | PE | Price | Vs current |
|---|---|---|---|
| Current | 11x | $6.70 | — |
| Cheap | 22x | $13.24 | +98% |
| Forward | 25x | $6.70 | — |
| Fair | 45x | $27.55 | +311% |
| Expensive | 67x | $40.69 | +507% |
Historical ranges are pointers, not guarantees.
TSSI's PE is in its cheap range at 11x. On analysts' estimates for next year's earnings, today's price would be 25x.
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.
TSSI Forward outlook
| Metric | Outlook |
|---|---|
| Strongly deteriorating | |
| Strong growth | |
| Growth | |
| Strongly improving | |
| Limited | |
| High |
Analysts expect earnings and revenue growth for TSSI, 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.
TSSI Earnings Per Share
| Quarter | TTM EPS | YoY |
|---|---|---|
| Forward | $0.27 | -57% |
| Q3 2026 | $0.61 | +205% |
| Q2 2026 | $0.51 | +42% |
| Q1 2026 | $0.52 | +44% |
| Q4 2025 | $0.56 | +133% |
| Q3 2025 | $0.20 | +11% |
| Q2 2025 | $0.36 | +300% |
| Q1 2025 | $0.36 | +800% |
| Q4 2024 | $0.24 | +$0.24 |
TSSI 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 TSSI 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.
TSSI Quarterly Revenue
| Quarter | Revenue | YoY |
|---|---|---|
| Q3 2026 | $50.1M | +20% |
| Q2 2026 | $35.1M | -20% |
| Q1 2026 | $55.3M | -44% |
| Q4 2025 | $60.9M | +22% |
| Q3 2025 | $41.9M | -40% |
| Q2 2025 | $44M | +262% |
| Q1 2025 | $99M | +523% |
| Q4 2024 | $50M | +105% |
TSSI's revenue is recovering but still below its 2025 peak: $50M last quarter, up 20% from the same quarter a year ago.
| Quarter | Margin | YoY |
|---|---|---|
| Q3 2026 | 2.3% | +4.5 points |
| Q2 2026 | 4.6% | -0.5 points |
| Q1 2026 | 4.1% | 0 points |
| Q4 2025 | 1.5% | -4 points |
| Q3 2025 | -2.2% | -7.6 points |
| Q2 2025 | 5.1% | -8.9 points |
| Q1 2025 | 4.2% | +2.6 points |
| Q4 2024 | 5.5% | +2.5 points |
TSSI 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.
TSSI Free Cash Flow
| Quarter | Free cash flow | YoY |
|---|---|---|
| Q3 2026 | -$12.6M | +$12.2M |
| Q2 2026 | $3.6M | -34% |
| Q1 2026 | -$15.5M | -368% |
| Q4 2025 | $15.8M | +$44.1M |
| Q1 2025 | $5.8M | +121% |
| Q4 2024 | -$28.4M | -$11.5M |
| Q1 2024 | $2.6M | +$16.3M |
| Q4 2023 | -$16.9M | -256% |
TSSI has the edge over AAOI on cash flow, with more consistent year-over-year improvement.
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.
TSSI Total Shares
| Period | Change % | Net change |
|---|---|---|
| Quarterly | 0% | +8K shares |
| 1 year | +16% | +4M shares |
| 3 years | +35% | +7.6M shares |
| 5 years | +43% | +9M shares |
| Available history | +41% | +8.6M shares |
TSSI has the edge over AAOI on shareholder dilution, with a more favorable share count trend.
| Quarter | Spent |
|---|---|
| Q3 2026 | $71,000 |
| Q2 2026 | $861,000 |
| Q1 2026 | $1.4M |
| Q4 2025 | $10,000 |
| Q3 2025 | $974,000 |
| Q2 2025 | $2.3M |
| Q1 2025 | $1.7M |
| Q4 2024 | $3.7M |
TSSI spent $2M buying back its own shares over the past year, down 73% 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.
TSSI Net Leverage
| Quarter | Net Leverage | Status |
|---|---|---|
| Q3 2026 | -5.4x | Net Cash |
| Q2 2026 | -10.1x | Net Cash |
| Q1 2026 | -7.8x | Net Cash |
| Q4 2025 | -8.4x | Net Cash |
| Q3 2025 | -4.8x | Net Cash |
| Q2 2025 | -1.2x | Net Cash |
| Q1 2025 | -1.5x | Net Cash |
| Q4 2024 | -1.7x | Net Cash |
TSSI 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).
TSSI Weekly Momentum
| Metric | Value | Status |
|---|---|---|
| RSI | 38.1 | Neutral |
| Stochastic | 8.7 | Oversold |
TSSI's weekly RSI is 38 (neutral) and its Stochastic is 9 (oversold).
AAOI PE vs Technology Sector
AAOI has no meaningful PE right now: it lost money over the past year.
TSSI PE vs Technology Sector
| Metric | TSSI | Sector median | Relative |
|---|---|---|---|
| PE | 11x | 28x | 61% below |
| PE % | 0 | 35 | 35 pts below |
TSSI is trading at 11x earnings, a 61% 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 the edge over TSSI on trend strength, trading above more of its moving averages.
TSSI Weekly Moving Averages
| Moving average | MA price | Relative |
|---|---|---|
| 8 week MA | $8.01 | 16% below |
| 20 week MA | $8.99 | 25% below |
| 50 week MA | $10.3 | 35% below |
| 100 week MA | $12.6 | 47% below |
| 200 week MA | $7.24 | 7.5% below |
TSSI is in a downtrend: it's below all five of its weekly moving averages, and 7.5% below 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 TSSI on returns for 2026, with the stronger performance.
TSSI Yearly ROI
| Year | Start price | End price | ROI |
|---|---|---|---|
| 2020 | $1.49 | $0.58 | -61% |
| 2021 | $0.58 | $0.47 | -19% |
| 2022 | $0.47 | $0.57 | +21% |
| 2023 | $0.57 | $0.27 | -53% |
| 2024 | $0.27 | $12.0 | +4333% |
| 2025 | $12.0 | $7.11 | -41% |
| 2026 YTD | $7.11 | $6.70 | -5.8% |
TSSI's yearly returns have swung widely, from +4333% in 2024 to −61% in 2020. It's down 5.8% so far in 2026.