Observatory · observe first
Simon Property Group
SPG · United States · Retail REITs · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.110%
12M weight contribution
+0.012 pp
3M weight contribution
+0.033 pp
12M price return
+45.7%
Share of matched S&P 500 members
Monthly observations through Jun 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 |
|---|---|---|---|---|---|
| Jun 2026 | $63.4bn | 0.110% | +0.012 pp | +45.7% | Yes |
| May 2026 | $58.1bn | 0.101% | -0.004 pp | +31.9% | Yes |
| Apr 2026 | $57.7bn | 0.078% | -0.029 pp | +35.9% | No |
| Mar 2026 | $52.8bn | 0.077% | -0.035 pp | +17.9% | No |
| Feb 2026 | $57.8bn | 0.079% | -0.039 pp | +15.1% | No |
| Jan 2026 | $54.2bn | 0.104% | -0.006 pp | +15.6% | Yes |
| Dec 2025 | $52.4bn | 0.103% | -0.008 pp | +12.9% | Yes |
| Nov 2025 | $52.8bn | 0.104% | -0.011 pp | +6.5% | Yes |
| Oct 2025 | $49.8bn | 0.098% | -0.015 pp | +9.1% | No |
| Sep 2025 | $53.2bn | 0.106% | -0.005 pp | +16.6% | Yes |
| Aug 2025 | $51.2bn | 0.106% | -0.008 pp | +13.4% | Yes |
| Jul 2025 | $46.4bn | 0.098% | +0.020 pp | +12.2% | No |
| Jun 2025 | $45.5bn | 0.098% | +0.018 pp | +11.3% | No |
| May 2025 | $46.2bn | 0.105% | +0.023 pp | +13.2% | No |
| Apr 2025 | $44.6bn | 0.107% | -0.008 pp | +17.7% | No |
| Mar 2025 | $47.1bn | 0.112% | -0.011 pp | +11.5% | No |
| Feb 2025 | $52.7bn | 0.118% | -0.002 pp | +32.1% | Yes |
| Jan 2025 | $49.3bn | 0.110% | -0.007 pp | +31.9% | No |
| Dec 2024 | $48.8bn | 0.111% | -0.010 pp | +26.9% | Yes |
| Nov 2024 | $52.0bn | 0.115% | +0.004 pp | +55.0% | Yes |
| Oct 2024 | $47.9bn | 0.113% | +0.007 pp | +62.3% | Yes |
| Sep 2024 | $47.9bn | 0.111% | +0.009 pp | +65.0% | Yes |
| Aug 2024 | $47.4bn | 0.115% | +0.012 pp | +56.1% | Yes |
| Jul 2024 | $43.5bn | 0.078% | +0.001 pp | +30.4% | No |
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.