Universe›Financials›Property & Casualty Insurance›Property & Casualty Insurance›W. R. Berkley Corporation
Observatory · observe first
W. R. Berkley Corporation
WRB · United States · Property & Casualty Insurance · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.050%
12M weight contribution
+0.000 pp
3M weight contribution
-0.003 pp
12M price return
+19.7%
Share of matched S&P 500 members
Monthly observations through Jan 2026
Company price index
A separate dimension from market allocation
Historical observations
Most recent 24 observations at or before the selected month
| Month | Market cap | Universe weight | 12M weight change | 12M return | Above 6M weight average |
|---|---|---|---|---|---|
| Jan 2026 | $26.1bn | 0.050% | +0.000 pp | +19.7% | No |
| Dec 2025 | $26.6bn | 0.052% | +0.002 pp | +23.0% | No |
| Nov 2025 | $29.5bn | 0.058% | +0.004 pp | +22.8% | Yes |
| Oct 2025 | $27.1bn | 0.053% | +0.002 pp | +27.3% | No |
| Sep 2025 | $29.1bn | 0.058% | +0.008 pp | +37.8% | No |
| Aug 2025 | $27.2bn | 0.056% | +0.001 pp | +23.1% | No |
| Jul 2025 | $26.1bn | 0.055% | +0.030 pp | +27.9% | No |
| Jun 2025 | $27.9bn | 0.060% | +0.035 pp | +43.7% | Yes |
| May 2025 | $28.3bn | 0.064% | +0.038 pp | +41.7% | Yes |
| Apr 2025 | $27.2bn | 0.065% | +0.027 pp | +43.2% | Yes |
| Mar 2025 | $27.0bn | 0.064% | +0.022 pp | +23.7% | Yes |
| Feb 2025 | $23.9bn | 0.053% | +0.013 pp | +16.0% | Yes |
| Jan 2025 | $22.4bn | 0.050% | +0.008 pp | +10.4% | No |
| Dec 2024 | $22.3bn | 0.051% | +0.014 pp | +27.2% | Yes |
| Nov 2024 | $24.6bn | 0.054% | +0.015 pp | +36.6% | Yes |
| Oct 2024 | $21.8bn | 0.051% | +0.012 pp | +30.2% | Yes |
| Sep 2024 | $21.6bn | 0.050% | +0.014 pp | +37.2% | Yes |
| Aug 2024 | $22.7bn | 0.055% | +0.021 pp | +48.7% | Yes |
| Jul 2024 | $14.1bn | 0.025% | +0.002 pp | +37.7% | No |
| Jun 2024 | $13.4bn | 0.025% | +0.001 pp | +35.6% | No |
| May 2024 | $13.8bn | 0.026% | +0.002 pp | +48.6% | No |
| Apr 2024 | $13.2bn | 0.038% | +0.003 pp | +33.4% | No |
| Mar 2024 | $15.1bn | 0.042% | +0.005 pp | +45.1% | Yes |
| Feb 2024 | $14.3bn | 0.041% | +0.000 pp | +29.0% | Yes |
Its weight is estimated market cap divided by the total estimated market cap of matched S&P 500 members for the month. This is not an official float-adjusted S&P index weight.