205.10 USD
↘ 13.90 (6.35%)PRE MARKET (AS OF 05:29 AM EDT)
ALNY Stock Premarket
Alnylam Pharmaceuticals, Inc.
ALNYNASDAQ • USD
Market: OPEN
Premarket trading runs 4:00 AM – 9:30 AM ET.
ALNY last traded at $205.10 in premarket, down $13.90 (6.35%) from its previous close of $219.00. Historically, 8% of ALNY gap-downs of 5% or more have fully filled within one trading day.
📅 ALNY is expected to report earnings around Oct 29, 2026 before the open (estimated), with an estimated EPS of $1.78. ALNY earnings details →
ALNY Premarket Chart
ALNY Premarket News
Gap Analytics — 5-year history, 5% minimum gap
Over the past 5 years, ALNY has had 20 qualifying gap events (gaps of 5% or more at the open) — 8 gap-ups and 12 gap-downs. Gap-ups averaged +15.6%, 63% have fully filled, median time to fill 1 trading day. Gap-downs averaged -8.4%, 50% have fully filled, median time to fill 7 trading days. Most recent: a -21.5% gap down 6 days ago, still unfilled. ALNY has 1 unfilled gap from the past 60 days — a -21.5% gap down on Jul 30, 2026, currently 8% retraced. Average 20-trading-day return after a ALNY gap up: +4.13%. After a gap down: -1.04%.
Gap Ups8 events
Fill Rate
62.5%
Avg Gap
15.6%
Avg 50% Fill
1d
Avg Fill
1d
Gap Downs12 events
Fill Rate
50.0%
Avg Gap
8.4%
Avg 50% Fill
2d
Avg Fill
7d
Avg Gap Fill by Timeframes
Gap Ups
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 75% | 88% | 88% | 88% |
| fills 50% | 50% | 63% | 63% | 63% |
| fills 75% | 38% | 63% | 63% | 63% |
| fills 100% | 38% | 63% | 63% | 63% |
Gap Downs
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 58% | 75% | 75% | 75% |
| fills 50% | 33% | 67% | 67% | 75% |
| fills 75% | 17% | 50% | 50% | 50% |
| fills 100% | 8% | 25% | 33% | 42% |
Active Unfilled Gaps (past 60 days)
6 days ago
2026-07-30
Gap %
-21.49%
Gap From
$286.62
% vs Current
+30.88%
retraced 8% to $230.01
Complete Gap History — 20 events
| Date | Gap From | Gap % | Status | Days to 50% | Days to Fill | % of Gap Filled After | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 day | 1 week | 2 week | 4 week | ||||||
| 6 days ago | $286.62 | -21.49% | Open | — | — | 8% | 8% | 8% | 8% |
| 27 days ago | $323.50 | +17.00% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2026-01-12 | $398.29 | -5.14% | Open | — | — | 4% | 4% | 4% | 4% |
| 2025-10-30 | $481.59 | -6.56% | Open | 1d | — | 71% | 71% | 71% | 71% |
| 2025-04-08 | $232.95 | +5.67% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2024-08-30 | $287.01 | -7.32% | Filled | 13d | 32d | 34% | 34% | 34% | 66% |
| 2024-08-05 | $272.05 | -5.90% | Filled | 1d | 6d | 62% | 100% | 100% | 100% |
| 2024-08-01 | $237.46 | +5.28% | Open | — | — | 39% | 39% | 39% | 39% |
| 2024-06-24 | $165.70 | +32.39% | Open | — | — | 19% | 19% | 19% | 19% |
| 2024-02-15 | $164.15 | -8.62% | Open | 5d | — | 23% | 99% | 99% | 99% |
| 2023-09-14 | $211.65 | -5.50% | Open | — | — | 21% | 21% | 21% | 21% |
| 2023-07-17 | $197.10 | +5.53% | Filled | 1d | 6d | 56% | 100% | 100% | 100% |
| 2022-08-04 | $212.01 | -10.65% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2022-08-03 | $141.97 | +47.92% | Open | — | — | 18% | 31% | 31% | 31% |
| 2022-01-21 | $138.31 | -5.86% | Filled | 1d | 8d | 95% | 95% | 100% | 100% |
| 2022-01-20 | $138.62 | +5.44% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2021-12-22 | $199.59 | -5.24% | Open | 2d | — | 44% | 69% | 69% | 69% |
| 2021-11-18 | $172.73 | +5.53% | Filled | 2d | 2d | 40% | 100% | 100% | 100% |
| 2021-10-28 | $191.16 | -11.56% | Filled | 6d | 18d | 15% | 75% | 94% | 100% |
| 2021-09-28 | $193.85 | -7.01% | Filled | 3d | 4d | 29% | 100% | 100% | 100% |
Frequently Asked Questions
What is ALNY's premarket price?
Alnylam Pharmaceuticals (ALNY) is trading at $205.10 in premarket, down $13.90 (6.35%) from the previous close of $219.00.
Why is ALNY moving in premarket?
Alnylam Pharmaceuticals (ALNY) is down 6.35% 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 ALNY premarket headlines and gap history below for the likely catalyst.
When does ALNY premarket trading start?
Premarket trading for ALNY 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 ALNY fill its gaps?
Over the past 5 years, 63% of ALNY gap-ups have fully filled and 50% of gap-downs have filled. Median time to fill is 1 trading days for gap-ups and 7 trading days for gap-downs.
Does ALNY have any unfilled gaps?
Yes. ALNY has 1 unfilled gap from the past 60 days. The largest is a -21.5% gap down from Jul 30, 2026 and is currently 8% retraced.
What's the average return after a ALNY gap?
Based on 20 qualifying gap events over the past 5 years, the average 20-trading-day return after a ALNY gap up is +4.13%, and after a gap down is -1.04%.
When does ALNY report earnings?
ALNY is expected to report earnings around Oct 29, 2026 before the open (estimated), with an estimated EPS of $1.78.