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Side-by-side financial comparison of FUEL TECH, INC. (FTEK) and Spero Therapeutics, Inc. (SPRO). Click either name above to swap in a different company.
Spero Therapeutics, Inc. is the larger business by last-quarter revenue ($12.6M vs $7.2M, roughly 1.7× FUEL TECH, INC.). On growth, Spero Therapeutics, Inc. posted the faster year-over-year revenue change (24080.8% vs 37.2%). Over the past eight quarters, Spero Therapeutics, Inc.'s revenue compounded faster (847.7% CAGR vs 20.9%).
Rocket Fuel was an ad technology company based in Redwood City, California. It was founded in 2008 by alumni of Yahoo!.
FTEK vs SPRO — Head-to-Head
Income Statement — Q4 FY2025 vs Q4 FY2025
| Metric | | |
|---|---|---|
| Revenue | $7.2M | $12.6M |
| Net Profit | — | $31.5M |
| Gross Margin | 44.6% | — |
| Operating Margin | -19.7% | — |
| Net Margin | — | 250.7% |
| Revenue YoY | 37.2% | 24080.8% |
| Net Profit YoY | — | 250.9% |
| EPS (diluted) | $-0.05 | $0.56 |
Green = leading value per metric. Periods may differ when fiscal calendars don't align.
8-Quarter Revenue & Profit Trend
Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.
| Q4 25 | $7.2M | $12.6M | ||
| Q3 25 | $7.5M | $0 | ||
| Q2 25 | $5.6M | $0 | ||
| Q1 25 | $6.4M | $12.0K | ||
| Q4 24 | $5.3M | $52.0K | ||
| Q3 24 | $7.9M | $65.0K | ||
| Q2 24 | $7.0M | $114.0K | ||
| Q1 24 | $5.0M | $140.0K |
| Q4 25 | — | $31.5M | ||
| Q3 25 | $303.0K | $-7.4M | ||
| Q2 25 | $-689.0K | $-1.7M | ||
| Q1 25 | $-739.0K | $-13.9M | ||
| Q4 24 | — | — | ||
| Q3 24 | $80.0K | $-17.1M | ||
| Q2 24 | $-421.0K | $-17.9M | ||
| Q1 24 | $281.0K | $-12.7M |
| Q4 25 | 44.6% | — | ||
| Q3 25 | 48.9% | — | ||
| Q2 25 | 45.5% | — | ||
| Q1 25 | 46.4% | — | ||
| Q4 24 | 42.3% | — | ||
| Q3 24 | 43.4% | — | ||
| Q2 24 | 41.9% | — | ||
| Q1 24 | 40.9% | — |
| Q4 25 | -19.7% | — | ||
| Q3 25 | 0.1% | — | ||
| Q2 25 | -23.5% | — | ||
| Q1 25 | -14.9% | -122758.3% | ||
| Q4 24 | -40.1% | — | ||
| Q3 24 | -2.3% | -28604.6% | ||
| Q2 24 | -10.2% | -16720.2% | ||
| Q1 24 | -34.1% | -9987.1% |
| Q4 25 | — | 250.7% | ||
| Q3 25 | 4.0% | — | ||
| Q2 25 | -12.4% | — | ||
| Q1 25 | -11.6% | -115550.0% | ||
| Q4 24 | — | — | ||
| Q3 24 | 1.0% | -26380.0% | ||
| Q2 24 | -6.0% | -15668.4% | ||
| Q1 24 | 5.7% | -9049.3% |
| Q4 25 | $-0.05 | $0.56 | ||
| Q3 25 | $0.01 | $-0.13 | ||
| Q2 25 | $-0.02 | $-0.03 | ||
| Q1 25 | $-0.02 | $-0.25 | ||
| Q4 24 | $-0.06 | — | ||
| Q3 24 | $0.00 | $-0.32 | ||
| Q2 24 | $-0.01 | $-0.33 | ||
| Q1 24 | $0.01 | $-0.24 |
Balance Sheet & Financial Strength
Snapshot of each company's liquidity, leverage and book value from the latest quarter.
| Metric | | |
|---|---|---|
| Cash + ST InvestmentsLiquidity on hand | $24.9M | $40.3M |
| Total DebtLower is stronger | — | — |
| Stockholders' EquityBook value | $39.9M | $59.0M |
| Total Assets | $47.2M | $68.9M |
| Debt / EquityLower = less leverage | — | — |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $24.9M | $40.3M | ||
| Q3 25 | $25.9M | $48.6M | ||
| Q2 25 | $23.0M | $31.2M | ||
| Q1 25 | $21.8M | $48.9M | ||
| Q4 24 | $18.7M | $52.9M | ||
| Q3 24 | $20.4M | $76.3M | ||
| Q2 24 | $20.1M | $63.5M | ||
| Q1 24 | $23.3M | $82.3M |
| Q4 25 | $39.9M | $59.0M | ||
| Q3 25 | $41.0M | $26.5M | ||
| Q2 25 | $40.7M | $32.8M | ||
| Q1 25 | $41.4M | $33.8M | ||
| Q4 24 | $42.0M | $46.1M | ||
| Q3 24 | $43.9M | $65.5M | ||
| Q2 24 | $43.6M | $80.5M | ||
| Q1 24 | $44.0M | $96.2M |
| Q4 25 | $47.2M | $68.9M | ||
| Q3 25 | $47.9M | $54.2M | ||
| Q2 25 | $47.0M | $62.1M | ||
| Q1 25 | $46.7M | $77.7M | ||
| Q4 24 | $48.8M | $110.5M | ||
| Q3 24 | $50.1M | $135.2M | ||
| Q2 24 | $49.0M | $149.9M | ||
| Q1 24 | $49.4M | $167.7M |
Cash Flow & Capital Efficiency
How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.
| Metric | | |
|---|---|---|
| Operating Cash FlowLast quarter | $-1.6M | $-8.4M |
| Free Cash FlowOCF − Capex | $-2.0M | — |
| FCF MarginFCF / Revenue | -27.7% | — |
| Capex IntensityCapex / Revenue | 6.1% | — |
| Cash ConversionOCF / Net Profit | — | -0.26× |
| TTM Free Cash FlowTrailing 4 quarters | $2.3M | — |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $-1.6M | $-8.4M | ||
| Q3 25 | $3.1M | $17.4M | ||
| Q2 25 | $-21.0K | $-17.7M | ||
| Q1 25 | $1.5M | $-4.0M | ||
| Q4 24 | $-1.6M | $-23.4M | ||
| Q3 24 | $879.0K | $12.8M | ||
| Q2 24 | $-1.6M | $-18.7M | ||
| Q1 24 | $-1.1M | $5.9M |
| Q4 25 | $-2.0M | — | ||
| Q3 25 | $3.0M | — | ||
| Q2 25 | $-57.0K | — | ||
| Q1 25 | $1.4M | — | ||
| Q4 24 | $-1.7M | — | ||
| Q3 24 | $767.0K | — | ||
| Q2 24 | $-1.7M | — | ||
| Q1 24 | $-1.2M | — |
| Q4 25 | -27.7% | — | ||
| Q3 25 | 39.6% | — | ||
| Q2 25 | -1.0% | — | ||
| Q1 25 | 22.6% | — | ||
| Q4 24 | -32.4% | — | ||
| Q3 24 | 9.8% | — | ||
| Q2 24 | -23.8% | — | ||
| Q1 24 | -24.0% | — |
| Q4 25 | 6.1% | — | ||
| Q3 25 | 1.7% | — | ||
| Q2 25 | 0.6% | — | ||
| Q1 25 | 1.0% | — | ||
| Q4 24 | 1.2% | — | ||
| Q3 24 | 1.4% | — | ||
| Q2 24 | 1.3% | — | ||
| Q1 24 | 2.3% | — |
| Q4 25 | — | -0.26× | ||
| Q3 25 | 10.22× | — | ||
| Q2 25 | — | — | ||
| Q1 25 | — | — | ||
| Q4 24 | — | — | ||
| Q3 24 | 10.99× | — | ||
| Q2 24 | — | — | ||
| Q1 24 | -3.83× | — |
Financial Flow Comparison
Revenue → gross profit → operating profit → net profit for each company.
Revenue Breakdown by Segment
FTEK
| Transferred At Point In Time | $5.3M | 73% |
| Other | $2.0M | 27% |
SPRO
Segment breakdown not available.
