614.98 USD
PREVIOUS CLOSE
REGN Stock Premarket
Regeneron Pharmaceuticals Inc
REGNNASDAQ • USD
Market: CLOSED
Premarket trading runs 4:00 AM – 9:30 AM ET.
📅 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%, 67% have fully filled, median time to fill 9.5 trading days. Most recent: a -11.8% gap down on May 18, 2026, still unfilled. REGN has 1 unfilled gap from the past 60 days — a -11.8% gap down on May 18, 2026, currently 43% retraced. 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
66.7%
Avg Gap
8.8%
Avg 50% Fill
3.5d
Avg Fill
9.5d
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% |
Active Unfilled Gaps (past 60 days)
30 days ago
2026-05-18
Gap %
-11.79%
Gap From
$698.25
% vs Current
+13.59%
retraced 43% to $651.00
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 | ||||||
| 30 days ago | $698.25 | -11.79% | Open | — | — | 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?
No premarket activity has been recorded yet for REGN today. The previous regular-session close was $614.98.
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 67% of gap-downs have filled. Median time to fill is 16 trading days for gap-ups and 10 trading days for gap-downs.
Does REGN have any unfilled gaps?
Yes. REGN has 1 unfilled gap from the past 60 days. The largest is a -11.8% gap down from May 18, 2026 and is currently 43% retraced.
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.