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Side-by-side financial comparison of HANOVER INSURANCE GROUP, INC. (THG) and WHITE MOUNTAINS INSURANCE GROUP LTD (WTM). Click either name above to swap in a different company.
HANOVER INSURANCE GROUP, INC. is the larger business by last-quarter revenue ($1.7B vs $1.6B, roughly 1.0× WHITE MOUNTAINS INSURANCE GROUP LTD). WHITE MOUNTAINS INSURANCE GROUP LTD runs the higher net margin — 52.1% vs 11.9%, a 40.2% gap on every dollar of revenue. On growth, WHITE MOUNTAINS INSURANCE GROUP LTD posted the faster year-over-year revenue change (348.0% vs 5.5%). Over the past eight quarters, WHITE MOUNTAINS INSURANCE GROUP LTD's revenue compounded faster (57.4% CAGR vs 3.8%).
The Hanover Insurance Group, Inc. is an insurance company based in Worcester, Massachusetts. It was the original name of a property-liability insurance firm established in 1852, and it remained a publicly traded company under that name until the early 1990s, when it changed its name to Allmerica Property & Casualty Companies.
White Mountains Insurance Group is a diversified insurance and related financial services holding company based in Hamilton, Bermuda. Redomiciled from Delaware, United States, on October 25, 1999, the company conducts most of its business through its insurance subsidiaries and other affiliates.
THG vs WTM — Head-to-Head
Income Statement — Q4 FY2025 vs Q4 FY2025
| Metric | | |
|---|---|---|
| Revenue | $1.7B | $1.6B |
| Net Profit | $198.5M | $835.8M |
| Gross Margin | — | 97.1% |
| Operating Margin | 17.3% | 56.2% |
| Net Margin | 11.9% | 52.1% |
| Revenue YoY | 5.5% | 348.0% |
| Net Profit YoY | 18.2% | 741.0% |
| EPS (diluted) | $5.46 | $325.02 |
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 | $1.7B | $1.6B | ||
| Q3 25 | $1.7B | $864.2M | ||
| Q2 25 | $1.7B | $689.2M | ||
| Q1 25 | $1.6B | $577.8M | ||
| Q4 24 | $1.6B | $358.0M | ||
| Q3 24 | $1.6B | $839.1M | ||
| Q2 24 | $1.5B | $395.4M | ||
| Q1 24 | $1.6B | $647.3M |
| Q4 25 | $198.5M | $835.8M | ||
| Q3 25 | $178.7M | $113.8M | ||
| Q2 25 | $157.1M | $122.9M | ||
| Q1 25 | $128.2M | $33.9M | ||
| Q4 24 | $167.9M | $-130.4M | ||
| Q3 24 | $102.1M | $179.0M | ||
| Q2 24 | $40.5M | $-54.6M | ||
| Q1 24 | $115.5M | $236.4M |
| Q4 25 | — | 97.1% | ||
| Q3 25 | — | 93.6% | ||
| Q2 25 | — | 93.8% | ||
| Q1 25 | — | 98.7% | ||
| Q4 24 | — | 97.9% | ||
| Q3 24 | — | 99.1% | ||
| Q2 24 | — | 98.2% | ||
| Q1 24 | — | 98.8% |
| Q4 25 | 17.3% | 56.2% | ||
| Q3 25 | 14.9% | 20.7% | ||
| Q2 25 | 12.7% | 25.6% | ||
| Q1 25 | 11.6% | 12.5% | ||
| Q4 24 | 16.1% | -33.7% | ||
| Q3 24 | 9.6% | 28.5% | ||
| Q2 24 | 6.2% | -8.8% | ||
| Q1 24 | 9.7% | 35.9% |
| Q4 25 | 11.9% | 52.1% | ||
| Q3 25 | 10.7% | 13.2% | ||
| Q2 25 | 9.5% | 17.8% | ||
| Q1 25 | 8.0% | 5.9% | ||
| Q4 24 | 10.6% | -36.4% | ||
| Q3 24 | 6.5% | 21.3% | ||
| Q2 24 | 2.6% | -13.8% | ||
| Q1 24 | 7.4% | 36.5% |
| Q4 25 | $5.46 | $325.02 | ||
| Q3 25 | $4.90 | $44.18 | ||
| Q2 25 | $4.30 | $47.75 | ||
| Q1 25 | $3.50 | $13.19 | ||
| Q4 24 | $4.60 | $-50.98 | ||
| Q3 24 | $2.80 | $69.68 | ||
| Q2 24 | $1.12 | $-21.24 | ||
| Q1 24 | $3.18 | $92.33 |
Balance Sheet & Financial Strength
Snapshot of each company's liquidity, leverage and book value from the latest quarter.
| Metric | | |
|---|---|---|
| Cash + ST InvestmentsLiquidity on hand | $1.1B | — |
| Total DebtLower is stronger | $843.3M | $837.0M |
| Stockholders' EquityBook value | $3.6B | $5.4B |
| Total Assets | $16.9B | $12.3B |
| Debt / EquityLower = less leverage | 0.24× | 0.15× |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $1.1B | — | ||
| Q3 25 | $915.7M | — | ||
| Q2 25 | $244.1M | — | ||
| Q1 25 | $315.1M | — | ||
| Q4 24 | $435.5M | — | ||
| Q3 24 | $427.1M | — | ||
| Q2 24 | $337.6M | — | ||
| Q1 24 | $264.6M | — |
| Q4 25 | $843.3M | $837.0M | ||
| Q3 25 | $843.0M | $870.4M | ||
| Q2 25 | $347.8M | $694.6M | ||
| Q1 25 | $722.5M | $676.1M | ||
| Q4 24 | $722.3M | $562.5M | ||
| Q3 24 | — | $544.9M | ||
| Q2 24 | — | $530.2M | ||
| Q1 24 | — | $532.1M |
| Q4 25 | $3.6B | $5.4B | ||
| Q3 25 | $3.4B | $4.8B | ||
| Q2 25 | $3.2B | $4.6B | ||
| Q1 25 | $3.0B | $4.5B | ||
| Q4 24 | $2.8B | $4.5B | ||
| Q3 24 | $2.9B | $4.6B | ||
| Q2 24 | $2.6B | $4.4B | ||
| Q1 24 | $2.5B | $4.5B |
| Q4 25 | $16.9B | $12.3B | ||
| Q3 25 | $16.8B | $12.3B | ||
| Q2 25 | $15.7B | $11.8B | ||
| Q1 25 | $15.5B | $11.0B | ||
| Q4 24 | $15.3B | $9.9B | ||
| Q3 24 | $15.4B | $10.3B | ||
| Q2 24 | $14.9B | $10.2B | ||
| Q1 24 | $14.6B | $9.6B |
| Q4 25 | 0.24× | 0.15× | ||
| Q3 25 | 0.25× | 0.18× | ||
| Q2 25 | 0.11× | 0.15× | ||
| Q1 25 | 0.24× | 0.15× | ||
| Q4 24 | 0.25× | 0.13× | ||
| Q3 24 | — | 0.12× | ||
| Q2 24 | — | 0.12× | ||
| Q1 24 | — | 0.12× |
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 | $378.2M | $53.9M |
| Free Cash FlowOCF − Capex | $377.0M | — |
| FCF MarginFCF / Revenue | 22.6% | — |
| Capex IntensityCapex / Revenue | 0.1% | — |
| Cash ConversionOCF / Net Profit | 1.91× | 0.06× |
| TTM Free Cash FlowTrailing 4 quarters | $1.2B | — |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $378.2M | $53.9M | ||
| Q3 25 | $554.4M | $359.3M | ||
| Q2 25 | $206.6M | $177.5M | ||
| Q1 25 | $38.9M | $-40.2M | ||
| Q4 24 | $213.5M | $64.1M | ||
| Q3 24 | $394.7M | $269.4M | ||
| Q2 24 | $139.5M | $216.8M | ||
| Q1 24 | $58.7M | $36.5M |
| Q4 25 | $377.0M | — | ||
| Q3 25 | $551.4M | — | ||
| Q2 25 | $204.9M | — | ||
| Q1 25 | $37.1M | — | ||
| Q4 24 | $210.5M | — | ||
| Q3 24 | $392.3M | — | ||
| Q2 24 | $137.3M | — | ||
| Q1 24 | $56.1M | — |
| Q4 25 | 22.6% | — | ||
| Q3 25 | 33.1% | — | ||
| Q2 25 | 12.4% | — | ||
| Q1 25 | 2.3% | — | ||
| Q4 24 | 13.3% | — | ||
| Q3 24 | 25.1% | — | ||
| Q2 24 | 8.9% | — | ||
| Q1 24 | 3.6% | — |
| Q4 25 | 0.1% | — | ||
| Q3 25 | 0.2% | — | ||
| Q2 25 | 0.1% | — | ||
| Q1 25 | 0.1% | — | ||
| Q4 24 | 0.2% | — | ||
| Q3 24 | 0.2% | — | ||
| Q2 24 | 0.1% | — | ||
| Q1 24 | 0.2% | — |
| Q4 25 | 1.91× | 0.06× | ||
| Q3 25 | 3.10× | 3.16× | ||
| Q2 25 | 1.32× | 1.44× | ||
| Q1 25 | 0.30× | -1.19× | ||
| Q4 24 | 1.27× | — | ||
| Q3 24 | 3.87× | 1.51× | ||
| Q2 24 | 3.44× | — | ||
| Q1 24 | 0.51× | 0.15× |
Financial Flow Comparison
Revenue → gross profit → operating profit → net profit for each company.
Revenue Breakdown by Segment
THG
| Personal Lines Segment | $684.6M | 41% |
| Core Commercial Lines Segment | $617.8M | 37% |
| Specialty Lines Segment | $377.9M | 23% |
WTM
Segment breakdown not available.
