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
0.022%
12M weight contribution
-0.057 pp
3M weight contribution
-0.001 pp
12M price return
-64.2%
Share of matched S&P 500 members
Monthly observations through Aug 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 |
|---|---|---|---|---|---|
| Aug 2026 | $13.0bn | 0.022% | -0.057 pp | -64.2% | Yes |
| Jul 2026 | $11.7bn | 0.020% | -0.065 pp | -69.8% | No |
| Jun 2026 | $11.6bn | 0.020% | -0.053 pp | -64.8% | No |
| May 2026 | $13.1bn | 0.023% | -0.048 pp | -56.2% | No |
| Apr 2026 | $14.1bn | 0.019% | -0.054 pp | -53.3% | No |
| Mar 2026 | $16.9bn | 0.025% | -0.052 pp | -49.1% | No |
| Feb 2026 | $18.7bn | 0.026% | -0.044 pp | -41.5% | No |
| Jan 2026 | $26.1bn | 0.050% | -0.020 pp | -19.7% | No |
| Dec 2025 | $28.5bn | 0.056% | -0.011 pp | -6.1% | No |
| Nov 2025 | $29.2bn | 0.057% | -0.016 pp | -15.4% | No |
| Oct 2025 | $29.2bn | 0.057% | -0.013 pp | -5.5% | No |
| 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 |
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.