Observatory · observe first
Arista Networks
ANET · United States · Communications Equipment · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.341%
12M weight contribution
+0.261 pp
3M weight contribution
-0.047 pp
12M price return
+23.0%
Share of matched S&P 500 members
Monthly observations through Jan 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 |
|---|---|---|---|---|---|
| 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 |
| Sep 2024 | $30.1bn | 0.070% | +0.023 pp | +108.7% | Yes |
| Aug 2024 | $27.8bn | 0.067% | +0.019 pp | +81.0% | Yes |
| Jul 2024 | $27.2bn | 0.049% | +0.023 pp | +123.5% | No |
| Jun 2024 | $27.5bn | 0.051% | +0.023 pp | +116.3% | No |
| May 2024 | $23.3bn | 0.045% | +0.013 pp | +78.9% | No |
| Apr 2024 | $20.1bn | 0.058% | +0.017 pp | +60.2% | No |
| Mar 2024 | $22.7bn | 0.063% | +0.019 pp | +72.8% | Yes |
| Feb 2024 | $21.7bn | 0.062% | +0.025 pp | +100.1% | 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.