REGN
Regeneron Pharmaceuticals Inc
stockNASDAQ
At CloseOct 28, 2026 3:59:59 PM EDT
813.60USD-0.306%(-2.50)536,499
Pre-marketOct 28, 2026 9:29:30 AM EDT
808.00USD-0.993%(-8.10)
After-hoursOct 28, 2026 4:39:30 PM EDT
813.27USD-0.041%(-0.33)
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83.74B
Healthcare
Biotechnology
CEO
Leonard Schleifer
HQ
Tarrytown, NY, USA
6,200
Previous Close
$816.10
Beta
0.47
52-Week High
$859.34 2026-09-03
52-Week Low
$591.52 2026-06-02
SMA 50
$791.72
SMA 200
$736.37
Avg. Vol 10D
621,361
Avg. Vol 30D
737,460
Avg. Vol 90D
742,851
Relative Vol
0.73
102.95M
99.07M
96.22%
2,134,934
2.16%
3.18
58%/42%
58.61%
47.04%
0.2500%
1,300,000
8
482
1,556
Oct 30, 2026 (1d)
Aug 18, 2026 · $0.940
15.5B
4.3B
40.43
24.74
14.04
Oct 28, 2026
Sandoz falls as headwinds in Germany prompt cautious outlook · 
Seeking Alpha
Oct 27, 2026
Regeneron agrees to $270m extension to supply Ebola medicine in US · 
Pharmaceutical Technology
Oct 26, 2026
REGN Profile
Regeneron Pharmaceuticals, Inc. is an American biotechnology company headquartered in Westchester County, New York. The company was founded in 1988.
REGN Performance
| Period | Price | Date | Change | Beta |
|---|---|---|---|---|
| 1W | 819.09 | 2026-10-22 | -0.70% | 1.959 |
| 1M | 750.51 | 2026-09-29 | +8.38% | -0.343 |
| 3M | 695.42 | 2026-07-29 | +16.96% | 0.744 |
| 6M | 686.36 | 2026-04-29 | +18.51% | 0.407 |
| 1Y | 652.91 | 2025-10-29 | +24.58% | 0.469 |
| 2Y | 927.33 | 2024-10-29 | -12.29% | — |
| 5Y | 639.94 | 2021-10-29 | +27.10% | 0.580 |
REGN Stock Summary
Regeneron Pharmaceuticals Inc (NASDAQ:REGN) stock price today is $813.38, and today's volume is 536,499. REGN is down 0.333% today. The 30 day average volume is 737,460. REGN market cap is $83.74B with 102.95M shares outstanding.