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Observatory · observe first
Automatic Data Processing
ADP · United States · Human Resource & Employment Services · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Latest available · not live
20182026
Universe weight
0.172%
12M weight contribution
-0.066 pp
3M weight contribution
+0.017 pp
12M price return
-9.5%
Share of matched S&P 500 members
Monthly observations through Sep 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 |
|---|---|---|---|---|---|
| Sep 2026 | $102.5bn | 0.172% | -0.066 pp | -9.5% | Yes |
| Aug 2026 | $113.7bn | 0.189% | -0.066 pp | -3.3% | Yes |
| Jul 2026 | $106.5bn | 0.186% | -0.079 pp | -11.5% | Yes |
| Jun 2026 | $89.5bn | 0.156% | -0.114 pp | -25.4% | Yes |
| May 2026 | $88.7bn | 0.154% | -0.146 pp | -30.1% | Yes |
| Apr 2026 | $84.7bn | 0.115% | -0.179 pp | -27.7% | No |
| Mar 2026 | $81.8bn | 0.119% | -0.176 pp | -31.8% | No |
| Feb 2026 | $86.3bn | 0.118% | -0.168 pp | -30.5% | No |
| Jan 2026 | $99.4bn | 0.190% | -0.084 pp | -16.7% | No |
| Dec 2025 | $104.0bn | 0.204% | -0.067 pp | -10.2% | No |
| Nov 2025 | $103.3bn | 0.203% | -0.073 pp | -15.1% | No |
| Oct 2025 | $105.3bn | 0.206% | -0.071 pp | -8.1% | No |
| Sep 2025 | $118.9bn | 0.238% | -0.025 pp | +8.3% | No |
| Aug 2025 | $123.2bn | 0.255% | -0.017 pp | +12.5% | No |
| Jul 2025 | $125.6bn | 0.265% | +0.072 pp | +20.3% | No |
| Jun 2025 | $125.2bn | 0.270% | +0.087 pp | +31.9% | No |
| May 2025 | $132.1bn | 0.299% | +0.108 pp | +35.8% | Yes |
| Apr 2025 | $122.3bn | 0.294% | +0.006 pp | +26.9% | Yes |
| Mar 2025 | $124.3bn | 0.295% | +0.011 pp | +25.0% | Yes |
| Feb 2025 | $128.2bn | 0.287% | -0.009 pp | +28.3% | Yes |
| Jan 2025 | $123.3bn | 0.274% | -0.026 pp | +26.0% | Yes |
| Dec 2024 | $119.3bn | 0.270% | -0.015 pp | +28.4% | Yes |
| Nov 2024 | $125.1bn | 0.276% | -0.019 pp | +36.5% | Yes |
| Oct 2024 | $118.0bn | 0.277% | -0.028 pp | +35.6% | 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.