TOP TIERMARKET NEWSWIRE
Movers explained · 2026-09-14

Archived explainer. For the current picture see today's SMMT page.

Why Is SUMMIT THERAPEUTICS (SMMT) Stock Up Today?

By the Top Tier Newswire AI Desk · September 14, 2026 at 9:50 AM ET · reviewed against 3 wire stories

SUMMIT THERAPEUTICS (SMMT) is up +6.64% in the latest session. Our newswire has captured 3 stories on SMMT across 3 sources in the last 36 hours, with AI sentiment reading bullish (avg 62/100).

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Why SMMT stock is up today

SMMT stock rose 6.64% to $18.72 on Friday, driven by positive trial results for its experimental drug ivonescimab in a Phase 3 lung cancer study. The compound outperformed Keytruda, reducing the risk of death by 27% in non-small cell lung cancer patients. The data, released by Summit’s partner, has sparked investor interest and fueled a sharp intraday rally.

What Happened

Summit Therapeutics Inc. filed an 8-K on Friday disclosing other events and financial statements. The most impactful development came from its partner, which announced updated data from the Phase III HARMONi-2 trial. Ivonescimab monotherapy showed a statistically significant improvement in overall survival compared to pembrolizumab monotherapy. The trial, conducted in China, demonstrated that ivonescimab cut death risk by 27% versus Keytruda, a major milestone for the company’s lead cancer therapy. The stock opened with a 5.1% gap up and climbed further throughout the session, reaching a high of $18.79 before settling near $18.69.

What The Data Shows

The stock has surged 27.0% over the past eight sessions, climbing from $14.17 to $18.00. On Friday alone, it reached a new 52-week high, marking eight such highs on the day. The intraday volume of 0.8 million shares, while below the 3-month average, reflects concentrated buying interest. The stock remains within its 52-week range of $12.07 to $29.23, though it is still unprofitable with a TTM EPS of -1.12 and negative revenue growth of 100.0% TTM.

What To Watch

Summit Therapeutics has no upcoming earnings date disclosed. Investors should monitor the breadth of coverage and further data releases from its Phase III trials, as well as potential regulatory developments or partnership updates.

AI-assisted analysis composed exclusively from headlines and data on the Top Tier newswire. Public view is delayed 4 hours from real time. Not financial advice.

SMMT by the numbers

Last: $18.72Session: +6.64%7 sessions: +26.99%Coverage: 3 stories / 3 sourcesAI sentiment: 62/100 (bullish)Mkt cap: $14.0B52w: $12.07 to $29.23
SMMT · today's session (5-min) · +4.53% vs prior close · updated 3:12 PM ET
$17.48$18.17$18.86prev close $17.55$18.347:00 AM9:02 AM11:05 AM1:07 PM3:10 PM7:00 AM · $18.407:05 AM · $18.287:10 AM · $18.147:20 AM · $18.267:25 AM · $18.317:30 AM · $18.207:35 AM · $18.207:40 AM · $18.237:45 AM · $18.167:50 AM · $18.177:55 AM · $18.108:00 AM · $18.118:05 AM · $18.108:10 AM · $18.188:35 AM · $18.108:40 AM · $18.108:45 AM · $18.108:50 AM · $18.158:55 AM · $18.259:00 AM · $18.249:05 AM · $18.219:15 AM · $18.169:20 AM · $18.209:25 AM · $18.089:30 AM · $18.149:35 AM · $18.579:40 AM · $18.679:45 AM · $18.729:50 AM · $18.709:55 AM · $18.3310:00 AM · $18.3610:05 AM · $18.3010:10 AM · $18.3710:15 AM · $18.2010:20 AM · $18.3110:25 AM · $18.3010:30 AM · $18.3910:35 AM · $18.4310:40 AM · $18.4110:45 AM · $18.4410:50 AM · $18.4310:55 AM · $18.4211:00 AM · $18.5111:05 AM · $18.4711:10 AM · $18.4211:15 AM · $18.3911:20 AM · $18.4811:25 AM · $18.5711:30 AM · $18.6211:35 AM · $18.6211:40 AM · $18.6411:45 AM · $18.6811:50 AM · $18.7511:55 AM · $18.6812:00 PM · $18.6812:05 PM · $18.6512:10 PM · $18.6812:15 PM · $18.7712:20 PM · $18.7512:25 PM · $18.7912:30 PM · $18.7512:35 PM · $18.7912:40 PM · $18.7012:45 PM · $18.6812:50 PM · $18.7012:55 PM · $18.731:00 PM · $18.661:05 PM · $18.661:10 PM · $18.631:15 PM · $18.641:20 PM · $18.611:25 PM · $18.601:30 PM · $18.641:35 PM · $18.611:40 PM · $18.591:45 PM · $18.521:50 PM · $18.551:55 PM · $18.632:00 PM · $18.542:05 PM · $18.562:10 PM · $18.572:15 PM · $18.642:20 PM · $18.612:25 PM · $18.642:30 PM · $18.642:35 PM · $18.632:40 PM · $18.592:45 PM · $18.602:50 PM · $18.582:55 PM · $18.593:00 PM · $18.493:05 PM · $18.433:10 PM · $18.34
AI sentiment, last 36h · averaged over 3 stories · 62/100 bullish
AI sentiment 62/100 (bullish)0 · bearish50bullish · 100

The headlines behind the move

Story flow · 3 stories on the wire, last 36h · hover or tap a dot for the headline
36h ago24h ago12h agopublishThe Fly · sentiment 63 · Summit partner announces updated data from Phase III HARMONi-2 trialThe Fly · 63Summit partner announces updated data from Phase III HARMONi-2 trialSeeking Alpha · sentiment 73 · Summit’s ivonescimab cuts death risk by 27% versus Keytruda in lung cancer trialSeeking Alpha · 73Summit’s ivonescimab cuts death risk by 27% versus Keytruda in lung cancer trialSEC 8-K · sentiment 50 · Summit Therapeutics Inc. (SMMT) files 8-KSEC 8-K · 50Summit Therapeutics Inc. (SMMT) files 8-K
6h agoSEC 8-KNEUTRAL 50General

Summit Therapeutics Inc. (SMMT) files 8-K

Filed: 2026-09-14 AccNo: 0001599298-26-000078 Size: 2 MB Item 8.01: Other Events Item 9.01: Financial Statements and Exhibits

1d agoSeeking AlphaBULLISH 73Product/PR

Summit’s ivonescimab cuts death risk by 27% versus Keytruda in lung cancer trial

Ivonescimab beat Keytruda in a China Phase 3 NSCLC trial, cutting death risk 27% and extending survival.

1d agoThe FlyBULLISH 63Product/PR

Summit partner announces updated data from Phase III HARMONi-2 trial

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More on SMMT: full news and sentiment history. Sentiment scores are AI-derived research signals, not financial advice.

Earlier SMMT move explainers: 2026-09-14 · 2026-09-04 · 2026-09-03 · 2026-09-01 · 2026-08-27 · 2026-08-26 · 2026-08-25 · 2026-08-17