How much did REGN move each index today?
S&P 500: REGN moved +0.61% and contributed +0.1 points of the index's +24.4-point move (0% of it), ranking #93 of 503 members by contribution to the move.
NASDAQ 100: REGN moved +0.61% and contributed +0.4 points of the index's +186.0-point move (0% of it), ranking #41 of 102 members by contribution to the move.
XLV: REGN moved +0.61% and contributed +0.02 points of the index's +0.60-point move (3% of it), ranking #14 of 59 members by contribution to the move.
XBI: REGN moved +0.61% and contributed +0.01 points of the index's +4.95-point move (0% of it), ranking #92 of 147 members by contribution to the move.
REGN closed the 2026-08-25 session at 833.56; that day's move sits in the 63th percentile of its own past year. The stock is 0.9% below its 52-week closing high and +8.3% for the year so far.
REGN in the S&P 500 beyond today
| window | REGN return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +2.88% | +0.3 pts | −14.5 pts | #417 of 503 |
| 1 month | +25.08% | +2.1 pts | +264.1 pts | #42 of 503 |
| quarter to date | +33.68% | +2.5 pts | +177.9 pts | #44 of 503 |
| year to date | +8.28% | +0.9 pts | +831.8 pts | #142 of 503 |
Who moved with and against REGN today?
On REGN's side of the S&P 500 tape: NVDA (+13.8 pts), AMD (+4.4 pts), MSFT (+4.1 pts). Pulling the other way: XOM (−1.8 pts), LLY (−1.3 pts), AMZN (−1.3 pts).
Every member's contribution, top to bottom, is on the index dashboards; the day's story is in the market-close note. Machine-readable figures for this stock: /api/stock/REGN, free to cite with attribution.