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Side-by-side financial comparison of CIENA CORP (CIEN) and CONSTELLIUM SE (CSTM). Click either name above to swap in a different company.
CONSTELLIUM SE is the larger business by last-quarter revenue ($2.2B vs $1.2B, roughly 1.8× CIENA CORP). CONSTELLIUM SE runs the higher net margin — 5.1% vs 4.1%, a 1.0% gap on every dollar of revenue. CIENA CORP produced more free cash flow last quarter ($134.6M vs $109.0M).
Ciena Corporation is an American optical networking systems and software company based in Hanover, Maryland. The company has been described as a vital player in optical connectivity. The company reported revenues of $4.8 billion and more than 9,000 employees, as of November 2025. Gary Smith serves as president and chief executive officer (CEO).
Constellium SE is an American-Swiss, French-based global manufacturer of aluminium rolled products, extruded products, and structural parts based on a large variety of advanced alloys. Constellium's C-TEC research center has been credited for advancing technology in the field of advanced aluminium alloy. Constellium primarily serves the aerospace, automotive, and packaging sectors. Large clients include Mercedes-Benz, Audi, BMW, Fiat Chrysler Automotive, Ford, Airbus, Boeing, and Bombardier.
CIEN vs CSTM — Head-to-Head
Income Statement — Q3 FY2025 vs Q4 FY2025
| Metric | | |
|---|---|---|
| Revenue | $1.2B | $2.2B |
| Net Profit | $50.3M | $112.0M |
| Gross Margin | 41.3% | — |
| Operating Margin | 6.0% | 7.5% |
| Net Margin | 4.1% | 5.1% |
| Revenue YoY | — | — |
| Net Profit YoY | — | — |
| EPS (diluted) | $0.35 | $0.79 |
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 | — | $2.2B | ||
| Q3 25 | $1.2B | $2.2B | ||
| Q2 25 | $1.1B | $2.1B | ||
| Q1 25 | $1.1B | $2.0B | ||
| Q4 24 | $1.1B | — | ||
| Q3 24 | $942.3M | — | ||
| Q2 24 | $910.8M | $1.9B | ||
| Q1 24 | $1.0B | — |
| Q4 25 | — | $112.0M | ||
| Q3 25 | $50.3M | $88.0M | ||
| Q2 25 | $9.0M | $36.0M | ||
| Q1 25 | $44.6M | $37.0M | ||
| Q4 24 | $37.0M | — | ||
| Q3 24 | $14.2M | — | ||
| Q2 24 | $-16.8M | $76.0M | ||
| Q1 24 | $49.5M | — |
| Q4 25 | — | — | ||
| Q3 25 | 41.3% | — | ||
| Q2 25 | 40.2% | — | ||
| Q1 25 | 44.0% | — | ||
| Q4 24 | 40.9% | — | ||
| Q3 24 | 42.9% | — | ||
| Q2 24 | 42.7% | — | ||
| Q1 24 | 45.0% | — |
| Q4 25 | — | 7.5% | ||
| Q3 25 | 6.0% | 5.8% | ||
| Q2 25 | 2.9% | 2.7% | ||
| Q1 25 | 7.5% | 3.1% | ||
| Q4 24 | 5.3% | — | ||
| Q3 24 | 2.8% | — | ||
| Q2 24 | -0.4% | 5.4% | ||
| Q1 24 | 8.2% | — |
| Q4 25 | — | 5.1% | ||
| Q3 25 | 4.1% | 4.1% | ||
| Q2 25 | 0.8% | 1.7% | ||
| Q1 25 | 4.2% | 1.9% | ||
| Q4 24 | 3.3% | — | ||
| Q3 24 | 1.5% | — | ||
| Q2 24 | -1.8% | 3.9% | ||
| Q1 24 | 4.8% | — |
| Q4 25 | — | $0.79 | ||
| Q3 25 | $0.35 | $0.62 | ||
| Q2 25 | $0.06 | $0.25 | ||
| Q1 25 | $0.31 | $0.26 | ||
| Q4 24 | $0.26 | — | ||
| Q3 24 | $0.10 | — | ||
| Q2 24 | $-0.12 | $0.51 | ||
| Q1 24 | $0.34 | — |
Balance Sheet & Financial Strength
Snapshot of each company's liquidity, leverage and book value from the latest quarter.
| Metric | | |
|---|---|---|
| Cash + ST InvestmentsLiquidity on hand | $1.3B | $120.0M |
| Total DebtLower is stronger | — | $1.9B |
| Stockholders' EquityBook value | $2.8B | $952.0M |
| Total Assets | $5.7B | $5.4B |
| Debt / EquityLower = less leverage | — | 2.00× |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | — | $120.0M | ||
| Q3 25 | $1.3B | $122.0M | ||
| Q2 25 | $1.3B | $133.0M | ||
| Q1 25 | $1.2B | $118.0M | ||
| Q4 24 | $1.3B | — | ||
| Q3 24 | $1.1B | — | ||
| Q2 24 | $1.3B | — | ||
| Q1 24 | $1.4B | — |
| Q4 25 | — | $1.9B | ||
| Q3 25 | — | $2.0B | ||
| Q2 25 | — | $2.0B | ||
| Q1 25 | — | $1.9B | ||
| Q4 24 | — | — | ||
| Q3 24 | — | — | ||
| Q2 24 | — | — | ||
| Q1 24 | — | — |
| Q4 25 | — | $952.0M | ||
| Q3 25 | $2.8B | $845.0M | ||
| Q2 25 | $2.8B | $780.0M | ||
| Q1 25 | $2.8B | $745.0M | ||
| Q4 24 | $2.8B | — | ||
| Q3 24 | $2.9B | — | ||
| Q2 24 | $2.9B | $796.0M | ||
| Q1 24 | $2.9B | — |
| Q4 25 | — | $5.4B | ||
| Q3 25 | $5.7B | $5.4B | ||
| Q2 25 | $5.7B | $5.4B | ||
| Q1 25 | $5.6B | $5.2B | ||
| Q4 24 | $5.6B | — | ||
| Q3 24 | $5.6B | — | ||
| Q2 24 | $5.6B | — | ||
| Q1 24 | $5.6B | — |
| Q4 25 | — | 2.00× | ||
| Q3 25 | — | 2.34× | ||
| Q2 25 | — | 2.53× | ||
| Q1 25 | — | 2.56× | ||
| Q4 24 | — | — | ||
| Q3 24 | — | — | ||
| Q2 24 | — | — | ||
| Q1 24 | — | — |
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 | $174.3M | $218.0M |
| Free Cash FlowOCF − Capex | $134.6M | $109.0M |
| FCF MarginFCF / Revenue | 11.0% | 5.0% |
| Capex IntensityCapex / Revenue | 3.3% | 5.0% |
| Cash ConversionOCF / Net Profit | 3.47× | 1.95× |
| TTM Free Cash FlowTrailing 4 quarters | $605.5M | $159.0M |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | — | $218.0M | ||
| Q3 25 | $174.3M | $99.0M | ||
| Q2 25 | $156.9M | $114.0M | ||
| Q1 25 | $103.7M | $58.0M | ||
| Q4 24 | $349.4M | — | ||
| Q3 24 | $-159.4M | — | ||
| Q2 24 | $58.5M | $138.0M | ||
| Q1 24 | $266.1M | — |
| Q4 25 | — | $109.0M | ||
| Q3 25 | $134.6M | $24.0M | ||
| Q2 25 | $128.2M | $37.0M | ||
| Q1 25 | $76.8M | $-11.0M | ||
| Q4 24 | $265.8M | — | ||
| Q3 24 | $-179.0M | — | ||
| Q2 24 | $41.6M | $54.0M | ||
| Q1 24 | $249.5M | — |
| Q4 25 | — | 5.0% | ||
| Q3 25 | 11.0% | 1.1% | ||
| Q2 25 | 11.4% | 1.8% | ||
| Q1 25 | 7.2% | -0.6% | ||
| Q4 24 | 23.6% | — | ||
| Q3 24 | -19.0% | — | ||
| Q2 24 | 4.6% | 2.8% | ||
| Q1 24 | 24.0% | — |
| Q4 25 | — | 5.0% | ||
| Q3 25 | 3.3% | 3.5% | ||
| Q2 25 | 2.6% | 3.7% | ||
| Q1 25 | 2.5% | 3.5% | ||
| Q4 24 | 7.4% | — | ||
| Q3 24 | 2.1% | — | ||
| Q2 24 | 1.9% | 4.3% | ||
| Q1 24 | 1.6% | — |
| Q4 25 | — | 1.95× | ||
| Q3 25 | 3.47× | 1.13× | ||
| Q2 25 | 17.50× | 3.17× | ||
| Q1 25 | 2.33× | 1.57× | ||
| Q4 24 | 9.44× | — | ||
| Q3 24 | -11.20× | — | ||
| Q2 24 | — | 1.82× | ||
| Q1 24 | 5.37× | — |
Financial Flow Comparison
Revenue → gross profit → operating profit → net profit for each company.
Revenue Breakdown by Segment
CIEN
| Optical Networking | $815.5M | 67% |
| Routing And Switching | $125.9M | 10% |
| Platform Softwareand Services Segment | $90.0M | 7% |
| Maintenance Support And Training | $80.7M | 7% |
| Installation And Deployment | $65.9M | 5% |
| Blue Planet Automation Softwareand Services Segment | $27.8M | 2% |
| Consulting And Network Design | $13.6M | 1% |
CSTM
| Packaging Rolled Products | $1.0B | 46% |
| Automotive Rolled Products | $318.0M | 14% |
| Aerospace Rolled Products | $270.0M | 12% |
| Transportation Industry Defense And Other Rolled Products | $232.0M | 11% |
| Automotive Extruded Products | $220.0M | 10% |
| Other Extruded Products | $132.0M | 6% |
| Specialty And Other Thin Rolled Products | $22.0M | 1% |
