Observatory · observe first
Regeneron Pharmaceuticals
REGN · United States · Biotechnology · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Historical observation
20182026
Universe weight
0.142%
12M weight contribution
-0.010 pp
3M weight contribution
+0.036 pp
12M price return
+9.0%
Share of matched S&P 500 members
Monthly observations through Dec 2025
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 |
|---|---|---|---|---|---|
| Dec 2025 | $72.5bn | 0.142% | -0.010 pp | +9.0% | Yes |
| Nov 2025 | $73.3bn | 0.144% | -0.012 pp | +4.6% | Yes |
| Oct 2025 | $61.2bn | 0.120% | -0.065 pp | -21.9% | Yes |
| Sep 2025 | $52.8bn | 0.106% | -0.124 pp | -46.3% | No |
| Aug 2025 | $54.6bn | 0.113% | -0.156 pp | -50.8% | No |
| Jul 2025 | $51.2bn | 0.108% | -0.074 pp | -49.3% | No |
| Jun 2025 | $49.3bn | 0.106% | -0.079 pp | -49.9% | No |
| May 2025 | $46.1bn | 0.104% | -0.072 pp | -49.8% | No |
| Apr 2025 | $56.3bn | 0.135% | -0.107 pp | -32.7% | No |
| Mar 2025 | $59.6bn | 0.141% | -0.109 pp | -34.0% | No |
| Feb 2025 | $65.7bn | 0.147% | -0.113 pp | -27.6% | No |
| Jan 2025 | $63.2bn | 0.141% | -0.123 pp | -28.6% | No |
| Dec 2024 | $66.9bn | 0.152% | -0.094 pp | -18.9% | No |
| Nov 2024 | $70.5bn | 0.156% | -0.086 pp | -8.9% | No |
| Oct 2024 | $78.8bn | 0.185% | -0.064 pp | +7.5% | No |
| Sep 2024 | $98.8bn | 0.230% | -0.028 pp | +27.7% | Yes |
| Aug 2024 | $111.3bn | 0.269% | +0.021 pp | +43.3% | Yes |
| Jul 2024 | $101.4bn | 0.182% | +0.030 pp | +45.5% | No |
| Jun 2024 | $98.7bn | 0.185% | +0.029 pp | +46.3% | No |
| May 2024 | $92.1bn | 0.176% | +0.005 pp | +33.3% | No |
| Apr 2024 | $83.7bn | 0.242% | -0.012 pp | +11.1% | No |
| Mar 2024 | $90.4bn | 0.251% | -0.013 pp | +17.1% | No |
| Feb 2024 | $90.8bn | 0.260% | +0.009 pp | +27.0% | Yes |
| Jan 2024 | $88.6bn | 0.263% | +0.019 pp | +24.3% | 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.