648.24 USD
↘ 90.10 (11.80%)PRE MARKET (AS OF Fri 05:29 AM EDT)
REGN Stock Premarket
Regeneron Pharmaceuticals Inc
REGNNASDAQ • USD
Market: CLOSED
Premarket trading runs 4:00 AM – 9:30 AM ET.
REGN last traded at $648.24 in premarket, down $90.10 (11.80%) from its previous close of $738.34. Historically, 0% of REGN gap-downs of 5% or more have fully filled within one trading day.
📅 REGN is expected to report earnings around Aug 7, 2026 before the open (estimated), with an estimated EPS of $10.88. REGN earnings details →
REGN Premarket Chart
REGN Premarket News
Gap Analytics — 5-year history, 5% minimum gap
Over the past 5 years, REGN has had 9 qualifying gap events (gaps of 5% or more at the open) — 3 gap-ups and 6 gap-downs. Gap-ups averaged +9.8%, 67% have fully filled, median time to fill 15.5 trading days. Gap-downs averaged -8.8%, 83% have fully filled, median time to fill 12 trading days. Most recent: a -11.8% gap down on May 18, 2026, which filled in 50 trading days. Average 20-trading-day return after a REGN gap up: +1.81%. After a gap down: +1.26%.
Gap Ups3 events
Fill Rate
66.7%
Avg Gap
9.8%
Avg 50% Fill
12.5d
Avg Fill
15.5d
Gap Downs6 events
Fill Rate
83.3%
Avg Gap
8.8%
Avg 50% Fill
4d
Avg Fill
12d
Avg Gap Fill by Timeframes
Gap Ups
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 100% | 100% | 100% | 100% |
| fills 50% | 33% | 33% | 33% | 33% |
| fills 75% | 33% | 33% | 33% | 33% |
| fills 100% | 33% | 33% | 33% | 33% |
Gap Downs
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 50% | 67% | 67% | 67% |
| fills 50% | 0% | 50% | 50% | 50% |
| fills 75% | 0% | 50% | 50% | 50% |
| fills 100% | 0% | 17% | 33% | 50% |
Complete Gap History — 9 events
| Date | Gap From | Gap % | Status | Days to 50% | Days to Fill | % of Gap Filled After | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 day | 1 week | 2 week | 4 week | ||||||
| 2026-05-18 | $698.25 | -11.79% | Filled | 33d | 50d | 21% | 43% | 43% | 43% |
| 2025-08-01 | $545.46 | +6.88% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-05-30 | $605.39 | -14.49% | Filled | 28d | 59d | 2% | 2% | 14% | 23% |
| 2025-04-29 | $610.86 | -8.04% | Filled | 2d | 4d | 37% | 100% | 100% | 100% |
| 2024-10-31 | $922.79 | -5.18% | Open | — | — | 17% | 17% | 17% | 17% |
| 2023-03-23 | $751.30 | +7.34% | Filled | 24d | 30d | 29% | 29% | 29% | 29% |
| 2023-01-09 | $737.15 | -5.97% | Filled | 4d | 12d | 34% | 87% | 90% | 100% |
| 2022-09-08 | $596.44 | +15.18% | Open | — | — | 38% | 38% | 38% | 38% |
| 2021-11-05 | $647.63 | -7.35% | Filled | 3d | 7d | 48% | 75% | 100% | 100% |
Frequently Asked Questions
What is REGN's premarket price?
Regeneron Pharmaceuticals (REGN) is trading at $648.24 in premarket, down $90.10 (11.80%) from the previous close of $738.34.
Why is REGN moving in premarket?
Regeneron Pharmaceuticals (REGN) is down 11.80% from its previous close in premarket trading. Premarket moves are usually driven by company-specific news, earnings results, analyst rating or price-target changes, or broad market and sector sentiment. Check the latest REGN premarket headlines and gap history below for the likely catalyst.
When does REGN premarket trading start?
Premarket trading for REGN on the NASDAQ runs from 4:00 AM to 9:30 AM Eastern Time, ahead of the regular session (9:30 AM – 4:00 PM ET). After-hours runs from 4:00 PM to 8:00 PM ET.
How often does REGN fill its gaps?
Over the past 5 years, 67% of REGN gap-ups have fully filled and 83% of gap-downs have filled. Median time to fill is 16 trading days for gap-ups and 12 trading days for gap-downs.
Does REGN have any unfilled gaps?
No. REGN has no unfilled gap events from the past 60 days; all recent gaps have been filled.
What's the average return after a REGN gap?
Based on 9 qualifying gap events over the past 5 years, the average 20-trading-day return after a REGN gap up is +1.81%, and after a gap down is +1.26%.
When does REGN report earnings?
REGN is expected to report earnings around Aug 7, 2026 before the open (estimated), with an estimated EPS of $10.88.