120.00 USD
↗ 0.08 (0.07%)AFTER HOURS (AS OF Tue 04:00 PM EDT)
INSM Stock After Hours
Insmed, Inc.
INSMNASDAQ • USD
Market: OPEN
After-hours trading runs 4:00 PM – 8:00 PM ET.
INSM last traded at $120.00 after hours, up $0.08 (0.07%) from its regular-session close of $119.92.
📅 INSM is expected to report earnings around Oct 29, 2026 before the open (estimated), with an estimated EPS of $-0.37. INSM earnings details →
INSM After Hours Chart
INSM After Hours News
Gap Analytics — 5-year history, 5% minimum gap
Over the past 5 years, INSM has had 13 qualifying gap events (gaps of 5% or more at the open) — 9 gap-ups and 4 gap-downs. Gap-ups averaged +25.1%, 56% have fully filled, median time to fill 4 trading days. Gap-downs averaged -10.4%, 50% have fully filled, median time to fill 4 trading days. Most recent: a +29.5% gap up on Aug 6, 2026, still unfilled. INSM has 1 unfilled gap from the past 60 days — a +29.5% gap up on Aug 6, 2026, currently 38% retraced. Average 20-trading-day return after a INSM gap up: +12.15%. After a gap down: -6.61%.
Gap Ups9 events
Fill Rate
55.6%
Avg Gap
25.1%
Avg 50% Fill
1.5d
Avg Fill
4d
Gap Downs4 events
Fill Rate
50.0%
Avg Gap
10.4%
Avg 50% Fill
1d
Avg Fill
4d
Avg Gap Fill by Timeframes
Gap Ups
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 56% | 56% | 56% | 67% |
| fills 50% | 33% | 56% | 56% | 56% |
| fills 75% | 33% | 56% | 56% | 56% |
| fills 100% | 22% | 44% | 44% | 44% |
Gap Downs
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 75% | 100% | 100% | 100% |
| fills 50% | 50% | 50% | 50% | 75% |
| fills 75% | 50% | 50% | 50% | 50% |
| fills 100% | 25% | 25% | 50% | 50% |
Active Unfilled Gaps (past 60 days)
41 days ago
2026-08-06
Gap %
+29.49%
Gap From
$99.02
% vs Current
-17.43%
retraced 38% to $117.15
Complete Gap History — 13 events
| Date | Gap From | Gap % | Status | Days to 50% | Days to Fill | % of Gap Filled After | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 day | 1 week | 2 week | 4 week | ||||||
| 2026-08-06 | $99.02 | +29.49% | Open | — | — | 7% | 7% | 21% | 38% |
| 2026-05-07 | $137.09 | -14.72% | Open | — | — | 42% | 42% | 42% | 42% |
| 2026-03-23 | $136.00 | +8.18% | Filled | 2d | 24d | 49% | 89% | 89% | 89% |
| 2026-01-09 | $170.27 | +8.66% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-12-18 | $198.46 | -15.47% | Open | 15d | — | 15% | 38% | 38% | 60% |
| 2025-06-10 | $70.68 | +25.41% | Open | — | — | 15% | 15% | 15% | 15% |
| 2024-08-05 | $71.81 | -6.27% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2024-05-28 | $22.00 | +125.68% | Open | — | — | 19% | 19% | 19% | 19% |
| 2024-05-09 | $26.00 | +8.88% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2023-09-05 | $22.64 | +6.23% | Open | 48d | — | 4% | 4% | 4% | 4% |
| 2022-11-10 | $18.64 | +5.15% | Filled | 2d | 4d | 40% | 100% | 100% | 100% |
| 2022-10-10 | $22.09 | -5.02% | Filled | 1d | 7d | 99% | 99% | 100% | 100% |
| 2021-12-07 | $26.81 | +8.22% | Filled | 1d | 4d | 82% | 100% | 100% | 100% |
Frequently Asked Questions
What is INSM's after-hours price?
Insmed (INSM) is trading at $120.00 after hours, up $0.08 (0.07%) from its regular-session close of $119.92.
Why is INSM moving after hours?
INSM is up 0.07% in after-hours trading. Moves in this session almost always follow something released after the 4:00 PM ET close — an earnings report, guidance, a filing, or news — and trade on far thinner volume than the regular session, so the size of the move can overstate what the market will settle on at the next open.
When does INSM after-hours trading start and end?
After-hours trading in INSM on the NASDAQ runs from 4:00 PM to 8:00 PM ET on trading days, immediately after the regular session closes. Not every broker offers the full window, and liquidity thins sharply after about 6:30 PM ET.
Will INSM's after-hours move hold at the open?
An after-hours move that carries into the next session becomes an opening gap, and INSM's gap history is the best guide to what happens next: 56% of INSM gap-ups have fully filled, and 50% of gap-downs have filled over the past 5 years. Fill rates this high mean a large after-hours move is more often faded than extended.
When does INSM report earnings?
INSM is expected to report earnings around Oct 29, 2026 before the open (estimated), with an estimated EPS of $-0.37. Earnings are the most common cause of a large after-hours move, since most companies report after the close.