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Side-by-side financial comparison of Arch Capital Group (ACGL) and MPLX LP (MPLX). Click either name above to swap in a different company.
Arch Capital Group is the larger business by last-quarter revenue ($4.5B vs $2.5B, roughly 1.8× MPLX LP). MPLX LP runs the higher net margin — 49.1% vs 23.2%, a 25.9% gap on every dollar of revenue. On growth, MPLX LP posted the faster year-over-year revenue change (1.4% vs -3.3%). Over the past eight quarters, MPLX LP's revenue compounded faster (6.2% CAGR vs 3.4%).
Arch Capital Group Ltd. is a Bermuda exempted public company which writes insurance, reinsurance and mortgage insurance on a worldwide basis, with a focus on specialty lines, the segment of the insurance industry where the more difficult and unusual risks are written. The company is headquartered in Bermuda and operates globally in 60 offices in North America, Europe, Asia and Australia.
MarkWest Energy Partners, L.P., a subsidiary of MPLX LP, is a natural gas gathering, processing and transportation company master limited partnership of the United States. In 1988, the company was founded in Denver, Colorado and grew to be Colorado's 13th largest company. In 2015 it was acquired by MPLX, itself a subsidiary of Marathon Petroleum.
ACGL vs MPLX — Head-to-Head
Income Statement — Q1 FY2026 vs Q4 FY2025
| Metric | | |
|---|---|---|
| Revenue | $4.5B | $2.5B |
| Net Profit | $1.0B | $1.2B |
| Gross Margin | — | — |
| Operating Margin | — | 60.5% |
| Net Margin | 23.2% | 49.1% |
| Revenue YoY | -3.3% | 1.4% |
| Net Profit YoY | 82.4% | 8.5% |
| EPS (diluted) | $2.88 | — |
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.
| Q1 26 | $4.5B | — | ||
| Q4 25 | $4.9B | $2.5B | ||
| Q3 25 | $5.1B | $2.5B | ||
| Q2 25 | $5.2B | $2.4B | ||
| Q1 25 | $4.7B | $2.5B | ||
| Q4 24 | $4.5B | $2.4B | ||
| Q3 24 | $4.7B | $2.3B | ||
| Q2 24 | $4.2B | $2.3B |
| Q1 26 | $1.0B | — | ||
| Q4 25 | $1.2B | $1.2B | ||
| Q3 25 | $1.4B | $1.6B | ||
| Q2 25 | $1.2B | $1.1B | ||
| Q1 25 | $574.0M | $1.1B | ||
| Q4 24 | $935.0M | $1.1B | ||
| Q3 24 | $988.0M | $1.0B | ||
| Q2 24 | $1.3B | $1.2B |
| Q1 26 | — | — | ||
| Q4 25 | — | 60.5% | ||
| Q3 25 | — | 73.2% | ||
| Q2 25 | — | 54.9% | ||
| Q1 25 | — | 55.5% | ||
| Q4 24 | — | 55.6% | ||
| Q3 24 | — | 54.4% | ||
| Q2 24 | — | 62.9% |
| Q1 26 | 23.2% | — | ||
| Q4 25 | 25.1% | 49.1% | ||
| Q3 25 | 26.4% | 63.2% | ||
| Q2 25 | 23.7% | 44.9% | ||
| Q1 25 | 12.3% | 46.2% | ||
| Q4 24 | 20.6% | 45.9% | ||
| Q3 24 | 20.9% | 44.6% | ||
| Q2 24 | 30.0% | 52.6% |
| Q1 26 | $2.88 | — | ||
| Q4 25 | $3.33 | — | ||
| Q3 25 | $3.56 | — | ||
| Q2 25 | $3.23 | — | ||
| Q1 25 | $1.48 | — | ||
| Q4 24 | $2.41 | — | ||
| Q3 24 | $2.56 | — | ||
| Q2 24 | $3.30 | — |
Balance Sheet & Financial Strength
Snapshot of each company's liquidity, leverage and book value from the latest quarter.
| Metric | | |
|---|---|---|
| Cash + ST InvestmentsLiquidity on hand | $24.0M | $2.1B |
| Total DebtLower is stronger | — | $24.2B |
| Stockholders' EquityBook value | $24.2B | — |
| Total Assets | $81.4B | $43.0B |
| Debt / EquityLower = less leverage | — | — |
8-quarter trend — quarters aligned by calendar period.
| Q1 26 | $24.0M | — | ||
| Q4 25 | $993.0M | $2.1B | ||
| Q3 25 | $1.1B | $1.8B | ||
| Q2 25 | $983.0M | $1.4B | ||
| Q1 25 | $1.2B | $2.5B | ||
| Q4 24 | $979.0M | $1.5B | ||
| Q3 24 | $1.0B | $2.4B | ||
| Q2 24 | $1.0B | $2.5B |
| Q1 26 | — | — | ||
| Q4 25 | — | $24.2B | ||
| Q3 25 | — | $24.1B | ||
| Q2 25 | — | $19.7B | ||
| Q1 25 | — | $19.7B | ||
| Q4 24 | — | $19.3B | ||
| Q3 24 | — | $19.3B | ||
| Q2 24 | — | $19.2B |
| Q1 26 | $24.2B | — | ||
| Q4 25 | $24.2B | — | ||
| Q3 25 | $23.7B | — | ||
| Q2 25 | $23.0B | — | ||
| Q1 25 | $21.5B | — | ||
| Q4 24 | $20.8B | — | ||
| Q3 24 | $22.3B | — | ||
| Q2 24 | $20.7B | — |
| Q1 26 | $81.4B | — | ||
| Q4 25 | $79.2B | $43.0B | ||
| Q3 25 | $79.2B | $43.2B | ||
| Q2 25 | $78.8B | $37.8B | ||
| Q1 25 | $75.2B | $39.0B | ||
| Q4 24 | $70.9B | $37.5B | ||
| Q3 24 | $73.7B | $38.5B | ||
| Q2 24 | $65.5B | $38.4B |
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 | $1.2B | $1.5B |
| Free Cash FlowOCF − Capex | — | $782.0M |
| FCF MarginFCF / Revenue | — | 31.9% |
| Capex IntensityCapex / Revenue | — | 29.1% |
| Cash ConversionOCF / Net Profit | 1.13× | 1.24× |
| TTM Free Cash FlowTrailing 4 quarters | — | $4.1B |
8-quarter trend — quarters aligned by calendar period.
| Q1 26 | $1.2B | — | ||
| Q4 25 | $1.4B | $1.5B | ||
| Q3 25 | $2.2B | $1.4B | ||
| Q2 25 | $1.1B | $1.7B | ||
| Q1 25 | $1.5B | $1.2B | ||
| Q4 24 | $1.6B | $1.7B | ||
| Q3 24 | $2.0B | $1.4B | ||
| Q2 24 | $1.5B | $1.6B |
| Q1 26 | — | — | ||
| Q4 25 | $1.4B | $782.0M | ||
| Q3 25 | $2.2B | $905.0M | ||
| Q2 25 | $1.1B | $1.4B | ||
| Q1 25 | $1.4B | $979.0M | ||
| Q4 24 | $1.6B | $1.4B | ||
| Q3 24 | $2.0B | $1.1B | ||
| Q2 24 | $1.5B | $1.4B |
| Q1 26 | — | — | ||
| Q4 25 | 28.2% | 31.9% | ||
| Q3 25 | 42.6% | 36.8% | ||
| Q2 25 | 21.3% | 60.9% | ||
| Q1 25 | 31.0% | 39.8% | ||
| Q4 24 | 34.3% | 56.6% | ||
| Q3 24 | 42.5% | 48.4% | ||
| Q2 24 | 35.6% | 60.0% |
| Q1 26 | — | — | ||
| Q4 25 | 0.2% | 29.1% | ||
| Q3 25 | 0.2% | 21.4% | ||
| Q2 25 | 0.2% | 12.8% | ||
| Q1 25 | 0.2% | 10.9% | ||
| Q4 24 | 0.3% | 12.7% | ||
| Q3 24 | 0.3% | 11.9% | ||
| Q2 24 | 0.3% | 9.4% |
| Q1 26 | 1.13× | — | ||
| Q4 25 | 1.13× | 1.24× | ||
| Q3 25 | 1.62× | 0.92× | ||
| Q2 25 | 0.91× | 1.64× | ||
| Q1 25 | 2.54× | 1.10× | ||
| Q4 24 | 1.68× | 1.51× | ||
| Q3 24 | 2.04× | 1.35× | ||
| Q2 24 | 1.20× | 1.32× |
Financial Flow Comparison
Revenue → gross profit → operating profit → net profit for each company.
Revenue Breakdown by Segment
ACGL
Segment breakdown not available.
MPLX
| Services | $746.0M | 30% |
| Other | $675.0M | 28% |
| Products | $492.0M | 20% |
| Nonrelated Party | $186.0M | 8% |
| Related Party | $151.0M | 6% |
| Crude Oil And Products Logistics | $104.0M | 4% |
| Service Other | $56.0M | 2% |
| Natural Gas And NGL Services | $41.0M | 2% |
