Observatory · observe first
Regeneron Pharmaceuticals
REGN · United States · Biotechnology · matched S&P 500 member. Follow its market-weight contribution.
Historical time machine
Latest available · not live
20182026
Universe weight
0.120%
12M weight contribution
+0.014 pp
3M weight contribution
+0.018 pp
12M price return
+35.6%
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 | $71.2bn | 0.120% | +0.014 pp | +35.6% | Yes |
| Aug 2026 | $75.1bn | 0.125% | +0.012 pp | +38.3% | Yes |
| Jul 2026 | $71.7bn | 0.125% | +0.017 pp | +40.6% | Yes |
| Jun 2026 | $58.6bn | 0.102% | -0.005 pp | +19.4% | No |
| May 2026 | $57.8bn | 0.100% | -0.004 pp | +26.1% | No |
| Apr 2026 | $66.4bn | 0.090% | -0.045 pp | +18.7% | No |
| Mar 2026 | $72.6bn | 0.106% | -0.036 pp | +22.5% | No |
| Feb 2026 | $73.4bn | 0.101% | -0.046 pp | +12.5% | No |
| Jan 2026 | $69.7bn | 0.133% | -0.007 pp | +10.8% | Yes |
| 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 |
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.