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Side-by-side financial comparison of Castellum, Inc. (CTM) 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 $12.6M, roughly 1.0× Castellum, Inc.). Spero Therapeutics, Inc. runs the higher net margin — 250.7% vs -10.5%, a 261.2% gap on every dollar of revenue. On growth, Spero Therapeutics, Inc. posted the faster year-over-year revenue change (24080.8% vs 21.9%). Over the past eight quarters, Spero Therapeutics, Inc.'s revenue compounded faster (847.7% CAGR vs 5.3%).
Castellum, Inc. is a U.S.-based cybersecurity and information technology services provider. It caters to government defense agencies, public sector entities, and commercial enterprise clients, offering threat detection, data protection, cloud security, and managed IT solutions to help organizations mitigate cyber risks and safeguard critical digital infrastructure.
CTM vs SPRO — Head-to-Head
Income Statement — Q4 FY2025 vs Q4 FY2025
| Metric | | |
|---|---|---|
| Revenue | $12.6M | $12.6M |
| Net Profit | $-1.3M | $31.5M |
| Gross Margin | 33.9% | — |
| Operating Margin | -11.1% | — |
| Net Margin | -10.5% | 250.7% |
| Revenue YoY | 21.9% | 24080.8% |
| Net Profit YoY | 51.8% | 250.9% |
| EPS (diluted) | $-0.02 | $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 | $12.6M | $12.6M | ||
| Q3 25 | $14.6M | $0 | ||
| Q2 25 | $14.0M | $0 | ||
| Q1 25 | $11.7M | $12.0K | ||
| Q4 24 | $10.3M | $52.0K | ||
| Q3 24 | $11.6M | $65.0K | ||
| Q2 24 | $11.5M | $114.0K | ||
| Q1 24 | $11.3M | $140.0K |
| Q4 25 | $-1.3M | $31.5M | ||
| Q3 25 | $415.4K | $-7.4M | ||
| Q2 25 | $-322.1K | $-1.7M | ||
| Q1 25 | $-1.2M | $-13.9M | ||
| Q4 24 | $-2.7M | — | ||
| Q3 24 | $-1.3M | $-17.1M | ||
| Q2 24 | $-1.8M | $-17.9M | ||
| Q1 24 | $-4.1M | $-12.7M |
| Q4 25 | 33.9% | — | ||
| Q3 25 | 37.6% | — | ||
| Q2 25 | 36.1% | — | ||
| Q1 25 | 39.0% | — | ||
| Q4 24 | 40.0% | — | ||
| Q3 24 | 42.7% | — | ||
| Q2 24 | 40.6% | — | ||
| Q1 24 | 39.8% | — |
| Q4 25 | -11.1% | — | ||
| Q3 25 | 3.0% | — | ||
| Q2 25 | -2.7% | — | ||
| Q1 25 | -12.7% | -122758.3% | ||
| Q4 24 | -15.7% | — | ||
| Q3 24 | -11.9% | -28604.6% | ||
| Q2 24 | -13.6% | -16720.2% | ||
| Q1 24 | -23.6% | -9987.1% |
| Q4 25 | -10.5% | 250.7% | ||
| Q3 25 | 2.8% | — | ||
| Q2 25 | -2.3% | — | ||
| Q1 25 | -10.0% | -115550.0% | ||
| Q4 24 | -26.6% | — | ||
| Q3 24 | -11.0% | -26380.0% | ||
| Q2 24 | -16.0% | -15668.4% | ||
| Q1 24 | -36.3% | -9049.3% |
| Q4 25 | $-0.02 | $0.56 | ||
| Q3 25 | $0.00 | $-0.13 | ||
| Q2 25 | $0.00 | $-0.03 | ||
| Q1 25 | $-0.01 | $-0.25 | ||
| Q4 24 | $-0.05 | — | ||
| Q3 24 | $-0.02 | $-0.32 | ||
| Q2 24 | $-0.03 | $-0.33 | ||
| Q1 24 | $-0.08 | $-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 | — | $40.3M |
| Total DebtLower is stronger | — | — |
| Stockholders' EquityBook value | $35.8M | $59.0M |
| Total Assets | $41.9M | $68.9M |
| Debt / EquityLower = less leverage | — | — |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | — | $40.3M | ||
| Q3 25 | — | $48.6M | ||
| Q2 25 | — | $31.2M | ||
| Q1 25 | — | $48.9M | ||
| Q4 24 | — | $52.9M | ||
| Q3 24 | — | $76.3M | ||
| Q2 24 | — | $63.5M | ||
| Q1 24 | — | $82.3M |
| Q4 25 | — | — | ||
| Q3 25 | — | — | ||
| Q2 25 | — | — | ||
| Q1 25 | — | — | ||
| Q4 24 | $8.0M | — | ||
| Q3 24 | $8.3M | — | ||
| Q2 24 | $8.7M | — | ||
| Q1 24 | $9.0M | — |
| Q4 25 | $35.8M | $59.0M | ||
| Q3 25 | $36.7M | $26.5M | ||
| Q2 25 | $31.8M | $32.8M | ||
| Q1 25 | $26.1M | $33.8M | ||
| Q4 24 | $20.2M | $46.1M | ||
| Q3 24 | $12.0M | $65.5M | ||
| Q2 24 | $12.1M | $80.5M | ||
| Q1 24 | $12.8M | $96.2M |
| Q4 25 | $41.9M | $68.9M | ||
| Q3 25 | $46.3M | $54.2M | ||
| Q2 25 | $43.4M | $62.1M | ||
| Q1 25 | $41.1M | $77.7M | ||
| Q4 24 | $37.8M | $110.5M | ||
| Q3 24 | $28.8M | $135.2M | ||
| Q2 24 | $29.5M | $149.9M | ||
| Q1 24 | $30.5M | $167.7M |
| Q4 25 | — | — | ||
| Q3 25 | — | — | ||
| Q2 25 | — | — | ||
| Q1 25 | — | — | ||
| Q4 24 | 0.40× | — | ||
| Q3 24 | 0.69× | — | ||
| Q2 24 | 0.72× | — | ||
| Q1 24 | 0.70× | — |
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 | $-661.7K | $-8.4M |
| Free Cash FlowOCF − Capex | — | — |
| FCF MarginFCF / Revenue | — | — |
| Capex IntensityCapex / Revenue | — | — |
| Cash ConversionOCF / Net Profit | — | -0.26× |
| TTM Free Cash FlowTrailing 4 quarters | — | — |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $-661.7K | $-8.4M | ||
| Q3 25 | $1.0M | $17.4M | ||
| Q2 25 | $214.2K | $-17.7M | ||
| Q1 25 | $-2.5M | $-4.0M | ||
| Q4 24 | $-394.4K | $-23.4M | ||
| Q3 24 | $742.2K | $12.8M | ||
| Q2 24 | $748.6K | $-18.7M | ||
| Q1 24 | $23.7K | $5.9M |
| Q4 25 | — | — | ||
| Q3 25 | $957.0K | — | ||
| Q2 25 | — | — | ||
| Q1 25 | — | — | ||
| Q4 24 | — | — | ||
| Q3 24 | $738.9K | — | ||
| Q2 24 | — | — | ||
| Q1 24 | — | — |
| Q4 25 | — | — | ||
| Q3 25 | 6.5% | — | ||
| Q2 25 | — | — | ||
| Q1 25 | — | — | ||
| Q4 24 | — | — | ||
| Q3 24 | 6.4% | — | ||
| Q2 24 | — | — | ||
| Q1 24 | — | — |
| Q4 25 | — | — | ||
| Q3 25 | 0.3% | — | ||
| Q2 25 | — | — | ||
| Q1 25 | — | — | ||
| Q4 24 | 0.0% | — | ||
| Q3 24 | 0.0% | — | ||
| Q2 24 | 0.0% | — | ||
| Q1 24 | 0.0% | — |
| Q4 25 | — | -0.26× | ||
| Q3 25 | 2.41× | — | ||
| Q2 25 | — | — | ||
| Q1 25 | — | — | ||
| Q4 24 | — | — | ||
| Q3 24 | — | — | ||
| Q2 24 | — | — | ||
| Q1 24 | — | — |
Financial Flow Comparison
Revenue → gross profit → operating profit → net profit for each company.
