17.35 USD
↘ 0.05 (0.29%)AFTER HOURS (AS OF Tue 04:00 PM EDT)
SMMT Stock After Hours
Summit Therapeutics Inc. Common Stock
SMMTNASDAQ • USD
Market: OPEN
After-hours trading runs 4:00 PM – 8:00 PM ET.
SMMT last traded at $17.35 after hours, down $0.05 (0.29%) from its regular-session close of $17.40.
📅 SMMT is expected to report earnings around Oct 19, 2026 after the close (estimated), with an estimated EPS of $-0.28. SMMT earnings details →
SMMT After Hours Chart
SMMT After Hours News
Gap Analytics — 5-year history, 5% minimum gap
Over the past 5 years, SMMT has had 32 qualifying gap events (gaps of 5% or more at the open) — 13 gap-ups and 19 gap-downs. Gap-ups averaged +10.1%, 77% have fully filled, median time to fill 1.5 trading days. Gap-downs averaged -10.4%, 79% have fully filled, median time to fill 4 trading days. Most recent: a +5.3% gap up 7 days ago, which filled in 1 trading day. SMMT has 2 unfilled gaps from the past 60 days; the largest is a +10.4% gap up on Aug 26, 2026, currently 99% retraced. Average 20-trading-day return after a SMMT gap up: -5.43%. After a gap down: +10.45%.
Gap Ups13 events
Fill Rate
76.9%
Avg Gap
10.1%
Avg 50% Fill
1d
Avg Fill
1.5d
Gap Downs19 events
Fill Rate
78.9%
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% | 69% | 85% | 85% | 85% |
| fills 50% | 62% | 85% | 85% | 85% |
| fills 75% | 46% | 85% | 85% | 85% |
| fills 100% | 38% | 69% | 77% | 77% |
Gap Downs
| 1 day | 1 week | 2 week | 4 week | |
|---|---|---|---|---|
| fills 25% | 74% | 95% | 100% | 100% |
| fills 50% | 58% | 74% | 79% | 84% |
| fills 75% | 37% | 63% | 63% | 74% |
| fills 100% | 11% | 53% | 53% | 63% |
Active Unfilled Gaps (past 60 days)
13 days ago
2026-09-03
Gap %
+6.30%
Gap From
$14.60
% vs Current
-16.09%
retraced 1% to $15.52
21 days ago
2026-08-26
Gap %
+10.40%
Gap From
$13.36
% vs Current
-23.22%
retraced 99% to $13.37
Complete Gap History — 32 events
| Date | Gap From | Gap % | Status | Days to 50% | Days to Fill | % of Gap Filled After | |||
|---|---|---|---|---|---|---|---|---|---|
| 1 day | 1 week | 2 week | 4 week | ||||||
| 7 days ago | $17.28 | +5.35% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 13 days ago | $14.60 | +6.30% | Open | — | — | 1% | 1% | 1% | 1% |
| 21 days ago | $13.36 | +10.40% | Open | 2d | — | 46% | 99% | 99% | 99% |
| 2026-07-24 | $14.98 | -8.41% | Filled | 1d | 13d | 56% | 56% | 56% | 100% |
| 2026-06-10 | $14.29 | -8.20% | Filled | 1d | 4d | 80% | 100% | 100% | 100% |
| 2026-05-22 | $17.47 | -5.67% | Filled | 1d | 3d | 93% | 100% | 100% | 100% |
| 2026-05-01 | $21.46 | -25.35% | Open | 7d | — | 15% | 40% | 62% | 62% |
| 2025-10-24 | $18.75 | +5.97% | Filled | 1d | 4d | 63% | 100% | 100% | 100% |
| 2025-10-20 | $20.99 | -10.20% | Open | 1d | — | 100% | 100% | 100% | 100% |
| 2025-09-12 | $18.60 | +6.56% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-09-10 | $18.82 | -7.20% | Filled | 2d | 3d | 47% | 100% | 100% | 100% |
| 2025-09-08 | $25.98 | -17.13% | Open | 26d | — | 28% | 28% | 28% | 28% |
| 2025-08-26 | $26.27 | +14.12% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-05-30 | $26.21 | -19.11% | Filled | 24d | 28d | 9% | 9% | 37% | 37% |
| 2025-05-02 | $24.67 | +5.11% | Filled | 3d | 3d | 10% | 100% | 100% | 100% |
| 2025-04-25 | $36.70 | -6.05% | Open | 1d | — | 65% | 65% | 65% | 65% |
| 2025-04-23 | $27.35 | +9.51% | Filled | 1d | 3d | 53% | 100% | 100% | 100% |
| 2025-04-07 | $17.36 | -7.78% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-04-03 | $20.46 | -5.21% | Filled | 6d | 6d | 23% | 100% | 100% | 100% |
| 2025-03-26 | $20.24 | +5.98% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2025-01-27 | $23.76 | -5.18% | Filled | 1d | 2d | 84% | 100% | 100% | 100% |
| 2024-10-04 | $18.61 | +8.60% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2024-09-27 | $22.81 | -5.79% | Filled | 14d | 14d | 16% | 42% | 42% | 100% |
| 2024-09-12 | $22.70 | +8.77% | Filled | 6d | 8d | 17% | 88% | 100% | 100% |
| 2024-09-09 | $12.27 | +30.89% | Open | — | — | 3% | 3% | 3% | 3% |
| 2024-08-05 | $10.41 | -9.17% | Filled | 1d | 2d | 75% | 100% | 100% | 100% |
| 2024-08-02 | $10.66 | -5.63% | Filled | 1d | 6d | 60% | 100% | 100% | 100% |
| 2024-06-03 | $8.69 | +13.30% | Filled | 1d | 2d | 97% | 100% | 100% | 100% |
| 2024-05-31 | $10.92 | -16.94% | Filled | 33d | 39d | 23% | 47% | 47% | 47% |
| 2023-01-04 | $5.00 | -8.47% | Filled | 1d | 1d | 100% | 100% | 100% | 100% |
| 2021-09-30 | $4.83 | -5.95% | Filled | 1d | 3d | 74% | 100% | 100% | 100% |
| 2021-09-22 | $6.48 | -20.52% | Filled | 2d | 54d | 25% | 83% | 83% | 83% |
Frequently Asked Questions
What is SMMT's after-hours price?
Summit Therapeutics (SMMT) is trading at $17.35 after hours, down $0.05 (0.29%) from its regular-session close of $17.40.
Why is SMMT moving after hours?
SMMT is down 0.29% 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 SMMT after-hours trading start and end?
After-hours trading in SMMT 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 SMMT's after-hours move hold at the open?
An after-hours move that carries into the next session becomes an opening gap, and SMMT's gap history is the best guide to what happens next: 77% of SMMT gap-ups have fully filled, and 79% 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 SMMT report earnings?
SMMT is expected to report earnings around Oct 19, 2026 after the close (estimated), with an estimated EPS of $-0.28. Earnings are the most common cause of a large after-hours move, since most companies report after the close.