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Side-by-side financial comparison of CENTURY ALUMINUM CO (CENX) and DIODES INC (DIOD). Click either name above to swap in a different company.
CENTURY ALUMINUM CO is the larger business by last-quarter revenue ($633.7M vs $391.6M, roughly 1.6× DIODES INC). DIODES INC runs the higher net margin — 2.6% vs 0.3%, a 2.3% gap on every dollar of revenue. On growth, DIODES INC posted the faster year-over-year revenue change (15.4% vs 0.4%). CENTURY ALUMINUM CO produced more free cash flow last quarter ($67.7M vs $12.4M). Over the past eight quarters, DIODES INC's revenue compounded faster (13.9% CAGR vs 13.8%).
Century Aluminum Company is a US-based producer of primary aluminum, with aluminum plants in Kentucky, South Carolina and Iceland. It is the largest producer of primary aluminum in the United States. The company is a publicly held corporation listed on the NASDAQ. The headquarters is at One South Wacker in Chicago.
Diodes Incorporated is a global semiconductor manufacturer that designs, produces and supplies discrete, analog and mixed-signal semiconductor products. Its solutions serve key end markets including automotive, industrial, consumer electronics, personal computing and communications infrastructure, with a worldwide customer base.
CENX vs DIOD — Head-to-Head
Income Statement — Q4 FY2025 vs Q4 FY2025
| Metric | | |
|---|---|---|
| Revenue | $633.7M | $391.6M |
| Net Profit | $1.8M | $10.2M |
| Gross Margin | 13.0% | 31.1% |
| Operating Margin | 5.2% | 3.4% |
| Net Margin | 0.3% | 2.6% |
| Revenue YoY | 0.4% | 15.4% |
| Net Profit YoY | -96.0% | 23.8% |
| EPS (diluted) | $0.03 | $0.23 |
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 | $633.7M | $391.6M | ||
| Q3 25 | $632.2M | $392.2M | ||
| Q2 25 | $628.1M | $366.2M | ||
| Q1 25 | $633.9M | $332.1M | ||
| Q4 24 | $630.9M | $339.3M | ||
| Q3 24 | $539.1M | $350.1M | ||
| Q2 24 | $560.8M | $319.8M | ||
| Q1 24 | $489.5M | $302.0M |
| Q4 25 | $1.8M | $10.2M | ||
| Q3 25 | $14.9M | $14.3M | ||
| Q2 25 | $-4.6M | $46.1M | ||
| Q1 25 | $29.7M | $-4.4M | ||
| Q4 24 | $45.2M | $8.2M | ||
| Q3 24 | $47.3M | $13.7M | ||
| Q2 24 | $-2.5M | $8.0M | ||
| Q1 24 | $246.8M | $14.0M |
| Q4 25 | 13.0% | 31.1% | ||
| Q3 25 | 12.2% | 30.7% | ||
| Q2 25 | 5.8% | 31.5% | ||
| Q1 25 | 9.6% | 31.5% | ||
| Q4 24 | 10.5% | 32.7% | ||
| Q3 24 | 15.2% | 33.7% | ||
| Q2 24 | 3.6% | 33.6% | ||
| Q1 24 | 3.4% | 33.0% |
| Q4 25 | 5.2% | 3.4% | ||
| Q3 25 | 9.2% | 3.0% | ||
| Q2 25 | 3.3% | 2.6% | ||
| Q1 25 | 7.3% | 0.4% | ||
| Q4 24 | 7.8% | 3.5% | ||
| Q3 24 | 11.8% | 6.2% | ||
| Q2 24 | 1.1% | 1.2% | ||
| Q1 24 | 0.4% | 4.3% |
| Q4 25 | 0.3% | 2.6% | ||
| Q3 25 | 2.4% | 3.6% | ||
| Q2 25 | -0.7% | 12.6% | ||
| Q1 25 | 4.7% | -1.3% | ||
| Q4 24 | 7.2% | 2.4% | ||
| Q3 24 | 8.8% | 3.9% | ||
| Q2 24 | -0.4% | 2.5% | ||
| Q1 24 | 50.4% | 4.6% |
| Q4 25 | $0.03 | $0.23 | ||
| Q3 25 | $0.15 | $0.31 | ||
| Q2 25 | $-0.05 | $0.99 | ||
| Q1 25 | $0.29 | $-0.10 | ||
| Q4 24 | $0.58 | $0.18 | ||
| Q3 24 | $0.46 | $0.30 | ||
| Q2 24 | $-0.03 | $0.17 | ||
| Q1 24 | $2.26 | $0.30 |
Balance Sheet & Financial Strength
Snapshot of each company's liquidity, leverage and book value from the latest quarter.
| Metric | | |
|---|---|---|
| Cash + ST InvestmentsLiquidity on hand | $134.2M | $377.0M |
| Total DebtLower is stronger | — | $25.7M |
| Stockholders' EquityBook value | $805.6M | $1.9B |
| Total Assets | $2.3B | $2.4B |
| Debt / EquityLower = less leverage | — | 0.01× |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $134.2M | $377.0M | ||
| Q3 25 | $151.4M | $386.4M | ||
| Q2 25 | $40.7M | $327.3M | ||
| Q1 25 | $44.9M | $343.9M | ||
| Q4 24 | $32.9M | $316.1M | ||
| Q3 24 | — | $319.3M | ||
| Q2 24 | $41.3M | $273.9M | ||
| Q1 24 | $93.5M | $276.0M |
| Q4 25 | — | $25.7M | ||
| Q3 25 | — | $24.9M | ||
| Q2 25 | — | $26.4M | ||
| Q1 25 | — | $20.5M | ||
| Q4 24 | — | $20.7M | ||
| Q3 24 | — | $22.2M | ||
| Q2 24 | — | $20.3M | ||
| Q1 24 | — | $20.9M |
| Q4 25 | $805.6M | $1.9B | ||
| Q3 25 | $741.8M | $1.9B | ||
| Q2 25 | $724.4M | $1.9B | ||
| Q1 25 | $726.3M | $1.8B | ||
| Q4 24 | $694.4M | $1.8B | ||
| Q3 24 | $628.5M | $1.8B | ||
| Q2 24 | $601.5M | $1.8B | ||
| Q1 24 | $601.5M | $1.7B |
| Q4 25 | $2.3B | $2.4B | ||
| Q3 25 | $2.1B | $2.5B | ||
| Q2 25 | $1.9B | $2.5B | ||
| Q1 25 | $2.0B | $2.4B | ||
| Q4 24 | $1.9B | $2.4B | ||
| Q3 24 | $2.1B | $2.4B | ||
| Q2 24 | $1.8B | $2.4B | ||
| Q1 24 | $1.8B | $2.4B |
| Q4 25 | — | 0.01× | ||
| Q3 25 | — | 0.01× | ||
| Q2 25 | — | 0.01× | ||
| Q1 25 | — | 0.01× | ||
| Q4 24 | — | 0.01× | ||
| Q3 24 | — | 0.01× | ||
| Q2 24 | — | 0.01× | ||
| Q1 24 | — | 0.01× |
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 | $102.8M | $38.1M |
| Free Cash FlowOCF − Capex | $67.7M | $12.4M |
| FCF MarginFCF / Revenue | 10.7% | 3.2% |
| Capex IntensityCapex / Revenue | 5.5% | 6.6% |
| Cash ConversionOCF / Net Profit | 57.11× | 3.74× |
| TTM Free Cash FlowTrailing 4 quarters | $84.8M | $137.2M |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $102.8M | $38.1M | ||
| Q3 25 | $2.0M | $79.1M | ||
| Q2 25 | $7.9M | $41.5M | ||
| Q1 25 | $72.3M | $56.7M | ||
| Q4 24 | $-41.4M | $81.8M | ||
| Q3 24 | $20.1M | $54.4M | ||
| Q2 24 | $11.5M | $14.4M | ||
| Q1 24 | $-14.8M | $-31.1M |
| Q4 25 | $67.7M | $12.4M | ||
| Q3 25 | $-18.1M | $62.8M | ||
| Q2 25 | $-15.9M | $21.1M | ||
| Q1 25 | $51.1M | $40.8M | ||
| Q4 24 | $-54.6M | $62.1M | ||
| Q3 24 | $-2.4M | $39.4M | ||
| Q2 24 | $-5.4M | $-3.5M | ||
| Q1 24 | $-44.5M | $-51.5M |
| Q4 25 | 10.7% | 3.2% | ||
| Q3 25 | -2.9% | 16.0% | ||
| Q2 25 | -2.5% | 5.8% | ||
| Q1 25 | 8.1% | 12.3% | ||
| Q4 24 | -8.7% | 18.3% | ||
| Q3 24 | -0.4% | 11.2% | ||
| Q2 24 | -1.0% | -1.1% | ||
| Q1 24 | -9.1% | -17.1% |
| Q4 25 | 5.5% | 6.6% | ||
| Q3 25 | 3.2% | 4.2% | ||
| Q2 25 | 3.8% | 5.6% | ||
| Q1 25 | 3.3% | 4.8% | ||
| Q4 24 | 2.1% | 5.8% | ||
| Q3 24 | 4.2% | 4.3% | ||
| Q2 24 | 3.0% | 5.6% | ||
| Q1 24 | 6.1% | 6.7% |
| Q4 25 | 57.11× | 3.74× | ||
| Q3 25 | 0.13× | 5.54× | ||
| Q2 25 | — | 0.90× | ||
| Q1 25 | 2.43× | — | ||
| Q4 24 | -0.92× | 9.93× | ||
| Q3 24 | 0.42× | 3.95× | ||
| Q2 24 | — | 1.80× | ||
| Q1 24 | -0.06× | -2.22× |
Financial Flow Comparison
Revenue → gross profit → operating profit → net profit for each company.
Revenue Breakdown by Segment
CENX
| Aluminum | $566.3M | 89% |
| Alumina | $67.4M | 11% |
DIOD
| Distributor | $253.1M | 65% |
| Direct Sales | $138.5M | 35% |
