White Mountains Insurance Group Ltd (WTM) — Net Asset Quality Index
White Mountains Insurance Group Ltd (WTM) has a Net Asset Quality Index of 21.7% as of March 2026. This metric measures the proportion of total assets financed by shareholders' equity — total assets of $7.13 Billion minus total liabilities of $5.59 Billion yields net assets of $1.55 Billion. A higher index indicates a stronger, lower-leverage balance sheet. Check White Mountains Insurance Group Ltd liquid asset ratio to evaluate the company's liquid asset resilience ratio.
Quality Index
Net Assets
Total Assets
Total Liabilities
White Mountains Insurance Group Ltd Net Asset Quality Index Over Time (1985–2025)
This chart shows how White Mountains Insurance Group Ltd's Net Asset Quality Index has evolved across 41 annual periods from 1985 to 2025. As of March 2026, the index stands at 21.7%, representing net assets of $1.55 Billion against total assets of $7.13 Billion USD. See WTM working capital efficiency to evaluate short-term liquidity relative to the company's equity base.
Annual Net Asset Quality Index for White Mountains Insurance Group Ltd (1985–2025)
The table below presents the year-by-year Net Asset Quality Index for White Mountains Insurance Group Ltd from 1985 to 2025, covering 41 annual filings. Each row shows total assets, total liabilities, net assets, the quality index percentage, and the change in percentage points compared to the prior year. For market capitalisation and the full company profile, see WTM market cap.
| Year | Quality Index | Net Assets (USD) | Total Assets | Total Liabilities | Change (pp) |
|---|---|---|---|---|---|
| 2025 | 50.8% | $6.26 Billion | $12.31 Billion | $6.05 Billion | ▼ -0.9 pp |
| 2024 | 51.7% | $5.13 Billion | $9.93 Billion | $4.79 Billion | ▼ -2.7 pp |
| 2023 | 54.4% | $4.56 Billion | $8.39 Billion | $3.82 Billion | ▲ +1.1 pp |
| 2022 | 53.3% | $3.94 Billion | $7.39 Billion | $3.45 Billion | ▲ +0.3 pp |
| 2021 | 52.9% | $3.70 Billion | $7.00 Billion | $3.30 Billion | ▼ -26.1 pp |
| 2020 | 79.0% | $3.82 Billion | $4.83 Billion | $1.01 Billion | ▲ +0.1 pp |
| 2019 | 78.9% | $3.14 Billion | $3.98 Billion | $838.50 Million | ▼ -1.9 pp |
| 2018 | 80.8% | $2.72 Billion | $3.36 Billion | $644.40 Million | ▼ -11.0 pp |
| 2017 | 91.8% | $3.36 Billion | $3.66 Billion | $298.40 Million | ▲ +34.7 pp |
| 2016 | 57.1% | $3.74 Billion | $6.54 Billion | $2.81 Billion | ▲ +14.6 pp |
| 2015 | 42.5% | $4.37 Billion | $10.28 Billion | $5.92 Billion | ▼ -0.9 pp |
| 2014 | 43.4% | $4.54 Billion | $10.46 Billion | $5.92 Billion | ▲ +7.2 pp |
| 2013 | 36.2% | $4.40 Billion | $12.14 Billion | $7.75 Billion | ▲ +3.2 pp |
| 2012 | 33.0% | $4.26 Billion | $12.90 Billion | $8.64 Billion | ▼ -0.2 pp |
| 2011 | 33.2% | $4.67 Billion | $14.06 Billion | $9.40 Billion | ▲ +3.9 pp |
| 2010 | 29.3% | $4.26 Billion | $14.53 Billion | $10.27 Billion | ▲ +1.2 pp |
| 2009 | 28.1% | $4.34 Billion | $15.44 Billion | $11.10 Billion | ▲ +6.1 pp |
| 2008 | 22.0% | $3.50 Billion | $15.90 Billion | $12.40 Billion | ▼ -7.2 pp |
| 2007 | 29.2% | $5.58 Billion | $19.11 Billion | $13.52 Billion | ▲ +3.2 pp |
| 2006 | 26.0% | $5.06 Billion | $19.44 Billion | $14.39 Billion | ▲ +6.3 pp |
| 2005 | 19.7% | $3.83 Billion | $19.42 Billion | $15.58 Billion | ▼ -0.7 pp |
| 2004 | 20.4% | $3.88 Billion | $19.02 Billion | $15.13 Billion | ▲ +1.7 pp |
| 2003 | 18.8% | $2.98 Billion | $15.88 Billion | $12.90 Billion | ▲ +1.2 pp |
| 2002 | 17.5% | $2.81 Billion | $16.03 Billion | $13.23 Billion | ▲ +19.3 pp |
| 2001 | -1.8% | $-301.90 Million | $16.49 Billion | $16.79 Billion | ▼ -31.3 pp |
| 2000 | 29.5% | $1.05 Billion | $3.55 Billion | $2.50 Billion | ▼ -0.5 pp |
| 1999 | 30.0% | $614.00 Million | $2.05 Billion | $1.44 Billion | ▼ -2.5 pp |
| 1998 | 32.5% | $702.50 Million | $2.16 Billion | $1.46 Billion | ▼ -2.5 pp |
| 1997 | 35.0% | $702.90 Million | $2.01 Billion | $1.31 Billion | ▼ -1.9 pp |
| 1996 | 36.9% | $731.00 Million | $1.98 Billion | $1.25 Billion | ▼ -2.8 pp |
| 1995 | 39.7% | $743.70 Million | $1.87 Billion | $1.13 Billion | ▼ -2.4 pp |
| 1994 | 42.1% | $761.10 Million | $1.81 Billion | $1.05 Billion | ▲ +14.7 pp |
| 1993 | 27.4% | $905.00 Million | $3.31 Billion | $2.40 Billion | ▼ -4.2 pp |
| 1992 | 31.6% | $988.30 Million | $3.13 Billion | $2.14 Billion | ▼ -18.9 pp |
| 1991 | 50.5% | $1.50 Billion | $2.96 Billion | $1.47 Billion | ▲ +37.7 pp |
| 1990 | 12.8% | $1.59 Billion | $12.43 Billion | $10.84 Billion | ▼ -3.7 pp |
| 1989 | 16.5% | $1.94 Billion | $11.72 Billion | $9.79 Billion | ▲ +2.8 pp |
| 1988 | 13.7% | $1.54 Billion | $11.19 Billion | $9.65 Billion | ▼ -2.0 pp |
| 1987 | 15.7% | $1.51 Billion | $9.60 Billion | $8.09 Billion | ▼ -1.3 pp |
| 1986 | 17.0% | $1.56 Billion | $9.18 Billion | $7.62 Billion | ▲ +0.2 pp |
| 1985 | 16.8% | $1.34 Billion | $7.99 Billion | $6.64 Billion | — |