Observatory · observe first
Omnicom Group
OMC · United States · Advertising · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.039%
12M weight contribution
+0.010 pp
3M weight contribution
+0.009 pp
12M price return
+13.6%
Share of matched S&P 500 members
Monthly observations through Jul 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 |
|---|---|---|---|---|---|
| Jul 2026 | $22.4bn | 0.039% | +0.010 pp | +13.6% | Yes |
| Jun 2026 | $20.8bn | 0.036% | +0.006 pp | +5.3% | Yes |
| May 2026 | $20.7bn | 0.036% | +0.003 pp | +2.9% | Yes |
| Apr 2026 | $21.9bn | 0.030% | -0.006 pp | +4.7% | No |
| Mar 2026 | $23.4bn | 0.034% | -0.005 pp | -5.6% | Yes |
| Feb 2026 | $26.5bn | 0.036% | -0.000 pp | +6.9% | Yes |
| Jan 2026 | $14.9bn | 0.028% | -0.009 pp | -7.9% | No |
| Dec 2025 | $15.6bn | 0.031% | -0.008 pp | -2.6% | Yes |
| Nov 2025 | $13.8bn | 0.027% | -0.018 pp | -29.2% | No |
| Oct 2025 | $14.5bn | 0.028% | -0.018 pp | -23.1% | No |
| Sep 2025 | $15.8bn | 0.032% | -0.015 pp | -18.3% | No |
| Aug 2025 | $15.2bn | 0.031% | -0.016 pp | -19.4% | No |
| Jul 2025 | $14.0bn | 0.029% | -0.005 pp | -24.1% | No |
| Jun 2025 | $14.0bn | 0.030% | -0.003 pp | -17.1% | No |
| May 2025 | $14.3bn | 0.032% | -0.002 pp | -18.5% | No |
| Apr 2025 | $14.9bn | 0.036% | -0.017 pp | -15.4% | No |
| Mar 2025 | $16.3bn | 0.039% | -0.014 pp | -11.6% | No |
| Feb 2025 | $16.3bn | 0.036% | -0.014 pp | -3.5% | No |
| Jan 2025 | $16.9bn | 0.038% | -0.016 pp | -1.0% | No |
| Dec 2024 | $16.8bn | 0.038% | -0.013 pp | +2.5% | No |
| Nov 2024 | $20.4bn | 0.045% | -0.005 pp | +34.0% | Yes |
| Oct 2024 | $19.7bn | 0.046% | -0.004 pp | +39.0% | Yes |
| Sep 2024 | $20.2bn | 0.047% | -0.002 pp | +43.1% | Yes |
| Aug 2024 | $19.6bn | 0.047% | -0.004 pp | +28.1% | 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.