Observatory · observe first
CoStar Group
CSGP · United States · Real Estate Services · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.072%
12M weight contribution
-0.000 pp
3M weight contribution
-0.002 pp
12M price return
+11.8%
Share of matched S&P 500 members
Monthly observations through Sep 2025
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 |
|---|---|---|---|---|---|
| Sep 2025 | $35.7bn | 0.072% | -0.000 pp | +11.8% | No |
| Aug 2025 | $37.9bn | 0.079% | +0.002 pp | +15.8% | Yes |
| Jul 2025 | $40.3bn | 0.085% | +0.028 pp | +22.0% | Yes |
| Jun 2025 | $33.9bn | 0.073% | +0.016 pp | +8.4% | Yes |
| May 2025 | $31.0bn | 0.070% | +0.009 pp | -5.9% | No |
| Apr 2025 | $30.4bn | 0.073% | -0.035 pp | -19.0% | Yes |
| Mar 2025 | $32.5bn | 0.077% | -0.032 pp | -18.0% | Yes |
| Feb 2025 | $31.3bn | 0.070% | -0.032 pp | -12.4% | No |
| Jan 2025 | $31.4bn | 0.070% | -0.032 pp | -8.2% | No |
| Dec 2024 | $29.3bn | 0.067% | -0.040 pp | -18.1% | No |
| Nov 2024 | $33.3bn | 0.074% | -0.032 pp | -2.0% | Yes |
| Oct 2024 | $29.8bn | 0.070% | -0.032 pp | -0.8% | Yes |
| Sep 2024 | $30.9bn | 0.072% | -0.033 pp | -1.9% | No |
| Aug 2024 | $31.7bn | 0.077% | -0.030 pp | -5.7% | No |
| Jul 2024 | $32.0bn | 0.057% | -0.017 pp | -7.1% | No |
| Jun 2024 | $30.3bn | 0.057% | -0.027 pp | -16.7% | No |
| May 2024 | $31.9bn | 0.061% | -0.019 pp | -1.5% | No |
| Apr 2024 | $37.4bn | 0.108% | +0.002 pp | +18.9% | Yes |
| Mar 2024 | $39.5bn | 0.109% | +0.014 pp | +40.3% | Yes |
| Feb 2024 | $35.5bn | 0.102% | +0.001 pp | +23.2% | No |
| Jan 2024 | $34.1bn | 0.101% | -0.007 pp | +7.2% | No |
| Dec 2023 | $35.7bn | 0.106% | -0.007 pp | +13.1% | Yes |
| Nov 2023 | $33.9bn | 0.106% | -0.006 pp | +2.5% | Yes |
| Oct 2023 | $30.0bn | 0.102% | -0.017 pp | -11.3% | 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.