Observatory · observe first
Arista Networks
ANET · United States · Communications Equipment · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Latest available · not live
20182026
Universe weight
0.431%
12M weight contribution
+0.065 pp
3M weight contribution
+0.060 pp
12M price return
+39.7%
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 | $256.8bn | 0.431% | +0.065 pp | +39.7% | Yes |
| Aug 2026 | $246.8bn | 0.411% | +0.055 pp | +43.3% | Yes |
| Jul 2026 | $227.1bn | 0.396% | +0.070 pp | +46.4% | Yes |
| Jun 2026 | $213.9bn | 0.372% | +0.095 pp | +66.0% | Yes |
| May 2026 | $200.8bn | 0.348% | +0.101 pp | +84.1% | Yes |
| Apr 2026 | $217.0bn | 0.294% | +0.045 pp | +109.9% | Yes |
| Mar 2026 | $154.3bn | 0.225% | -0.007 pp | +58.5% | No |
| Feb 2026 | $167.7bn | 0.230% | -0.032 pp | +43.5% | No |
| Jan 2026 | $178.5bn | 0.341% | +0.261 pp | +23.0% | No |
| Dec 2025 | $165.0bn | 0.323% | +0.244 pp | +18.5% | No |
| Nov 2025 | $164.6bn | 0.323% | +0.253 pp | +28.8% | No |
| Oct 2025 | $198.2bn | 0.388% | +0.317 pp | +63.2% | Yes |
| Sep 2025 | $183.1bn | 0.367% | +0.296 pp | +51.9% | Yes |
| Aug 2025 | $171.6bn | 0.356% | +0.289 pp | +54.6% | Yes |
| Jul 2025 | $154.8bn | 0.326% | +0.278 pp | +42.2% | Yes |
| Jun 2025 | $128.5bn | 0.277% | +0.226 pp | +16.8% | Yes |
| May 2025 | $108.8bn | 0.247% | +0.202 pp | +16.4% | Yes |
| Apr 2025 | $103.8bn | 0.249% | +0.191 pp | +28.3% | Yes |
| Mar 2025 | $97.7bn | 0.232% | +0.169 pp | +6.9% | Yes |
| Feb 2025 | $117.3bn | 0.262% | +0.200 pp | +34.1% | Yes |
| Jan 2025 | $36.3bn | 0.081% | +0.021 pp | +78.2% | Yes |
| Dec 2024 | $34.8bn | 0.079% | +0.024 pp | +87.7% | Yes |
| Nov 2024 | $32.0bn | 0.071% | +0.017 pp | +84.7% | Yes |
| Oct 2024 | $30.4bn | 0.071% | +0.018 pp | +92.9% | 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.