REGN Stock Premarket

Regeneron Pharmaceuticals Inc
REGNNASDAQUSD
614.98 USD
PREVIOUS CLOSE
🔴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 →

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
Avg 20d return after gap-up: +1.81%
Gap Downs6 events
Fill Rate
66.7%
Avg Gap
8.8%
Avg 50% Fill
3.5d
Avg Fill
9.5d
Avg 20d return after gap-down: +1.26%
Avg Gap Fill by Timeframes
Gap Ups
1 day1 week2 week4 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 day1 week2 week4 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
DateGap FromGap %StatusDays to 50%Days to Fill% of Gap Filled After
1 day1 week2 week4 week
30 days ago$698.25-11.79%Open21%43%43%43%
2025-08-01$545.46+6.88%Filled1d1d100%100%100%100%
2025-05-30$605.39-14.49%Filled28d59d2%2%14%23%
2025-04-29$610.86-8.04%Filled2d4d37%100%100%100%
2024-10-31$922.79-5.18%Open17%17%17%17%
2023-03-23$751.30+7.34%Filled24d30d29%29%29%29%
2023-01-09$737.15-5.97%Filled4d12d34%87%90%100%
2022-09-08$596.44+15.18%Open38%38%38%38%
2021-11-05$647.63-7.35%Filled3d7d48%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.