Observatory · observe first
BlackRock
BLK · United States · Asset Management & Custody Banks · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.344%
12M weight contribution
+0.344 pp
3M weight contribution
+0.004 pp
12M price return
+29.9%
Share of matched S&P 500 members
Monthly observations through May 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 |
|---|---|---|---|---|---|
| May 2025 | $151.8bn | 0.344% | +0.344 pp | +29.9% | No |
| Apr 2025 | $141.9bn | 0.341% | +0.341 pp | +24.0% | No |
| Mar 2025 | $146.9bn | 0.349% | +0.349 pp | +16.2% | Yes |
| Feb 2025 | $151.8bn | 0.339% | +0.339 pp | +23.4% | Yes |
| Jan 2025 | $166.6bn | 0.370% | +0.370 pp | +42.2% | Yes |
| Dec 2024 | $158.8bn | 0.360% | +0.360 pp | +29.3% | Yes |
| Nov 2024 | $158.4bn | 0.350% | +0.350 pp | +39.6% | 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.