Observatory · observe first
Martin Marietta Materials
MLM · United States · Construction Materials · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.074%
12M weight contribution
+0.002 pp
3M weight contribution
-0.003 pp
12M price return
+21.3%
Share of matched S&P 500 members
Monthly observations through Dec 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 |
|---|---|---|---|---|---|
| Dec 2025 | $37.6bn | 0.074% | +0.002 pp | +21.3% | No |
| Nov 2025 | $37.6bn | 0.074% | -0.007 pp | +4.5% | No |
| Oct 2025 | $37.0bn | 0.072% | -0.013 pp | +4.1% | No |
| Sep 2025 | $38.0bn | 0.076% | -0.000 pp | +17.8% | Yes |
| Aug 2025 | $37.2bn | 0.077% | -0.002 pp | +16.1% | Yes |
| Jul 2025 | $34.7bn | 0.073% | +0.008 pp | -2.5% | Yes |
| Jun 2025 | $33.1bn | 0.071% | +0.009 pp | +1.9% | No |
| May 2025 | $33.0bn | 0.075% | +0.007 pp | -3.7% | Yes |
| Apr 2025 | $31.6bn | 0.076% | -0.029 pp | -10.2% | Yes |
| Mar 2025 | $29.2bn | 0.069% | -0.036 pp | -21.7% | No |
| Feb 2025 | $29.5bn | 0.066% | -0.036 pp | -15.9% | No |
| Jan 2025 | $33.3bn | 0.074% | -0.019 pp | +7.6% | No |
| Dec 2024 | $31.6bn | 0.072% | -0.020 pp | +4.1% | No |
| Nov 2024 | $36.7bn | 0.081% | -0.009 pp | +29.7% | Yes |
| Oct 2024 | $36.2bn | 0.085% | -0.001 pp | +45.7% | Yes |
| Sep 2024 | $32.9bn | 0.077% | -0.008 pp | +31.9% | Yes |
| Aug 2024 | $32.6bn | 0.079% | -0.009 pp | +20.2% | No |
| Jul 2024 | $36.6bn | 0.066% | +0.005 pp | +33.7% | No |
| Jun 2024 | $33.4bn | 0.063% | -0.004 pp | +18.0% | No |
| May 2024 | $35.3bn | 0.067% | +0.006 pp | +44.4% | No |
| Apr 2024 | $36.2bn | 0.105% | +0.029 pp | +62.6% | Yes |
| Mar 2024 | $38.0bn | 0.105% | +0.030 pp | +74.0% | Yes |
| Feb 2024 | $35.7bn | 0.102% | +0.024 pp | +61.6% | Yes |
| Jan 2024 | $31.4bn | 0.093% | +0.017 pp | +42.3% | 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.