Summit Therapeutics Inc SMMT

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Summit Therapeutics Inc. - Common Stock · Company · Nasdaq · Healthcare / Biotechnology

Paper trade (simulated — no real money)

Fill: USD 15.4700 · FX 1 USD = 1.277900 SGD · about SGD 19.7691 per unit

Sign in to practise with simulated trades before investing real money. USD fills are converted into the SGD portfolio at the displayed rate.

Announcement types: (default: consequential filings)
Results & current reports
Capital markets
Ownership & governance

USD closing-price chart (daily close from yfinance · Last year)

USD 19.28 → 15.47 · -19.8%
26.38019.40512.430 1 2 3 4 5,6 7 8,9 10,11 12 13 14 15 16 17 18 19,20,21,22 23 24 25 26 27 28 29 30 Oct 25Jan 26Apr 26Jul 26Oct 26

Numbered dotted lines mark the filtered filings under Announcement Events below.

Price & SEC Filing History 24 Oct 2025 — 25 Oct 2026 (Last year)

Daily Nasdaq prices are sourced from yfinance. Yellow highlighting marks an intraday rise or a gap up between adjacent trading sessions. SEC acceptance times are converted to US Eastern time: pre-market filings appear below that day’s OHLCV row; filings accepted after the 09:30 ET open appear above it. The SEC does not publish an exact first-public-availability timestamp, so acceptance time is the best available proxy.

Weekend
Weekend
15.4600 15.5500 15.0750 15.4700 3,204,748
15.2900 15.7000 15.1300 15.5500 4,150,800
16.3500 16.3500 15.7200 15.8300 5,363,900
15.5000 16.1800 15.0600 16.0900 6,250,500
30 · DEF 14A After market open · 11:01 ET DEF 14A ↗
14.9000 15.7700 14.8300 15.5700 6,152,600
Weekend
Weekend
15.3900 15.4100 14.5600 14.6300 4,331,000
15.0900 15.5500 15.0800 15.3700 4,726,800
15.2900 15.5650 15.0400 15.1300 4,657,100
16.7900 16.7900 15.4650 15.5200 7,132,000
17.4750 17.5900 17.0500 17.1300 4,371,200
Weekend
Weekend
17.3600 17.6200 16.8200 17.5900 5,751,500
17.6120 17.6360 16.7950 17.1700 6,173,200
17.1000 18.3280 16.9800 17.9500 8,167,900
29 · PRE 14A After-hours · 21:03 ET PRE 14A ↗
17.4900 17.5300 16.5300 17.3100 5,872,900
16.9700 17.6200 16.4400 17.2700 5,277,700
Weekend
Weekend
16.9600 17.3200 16.6600 16.7550 5,190,100
16.8200 17.4950 16.5900 16.6900 7,898,900
16.5900 17.7200 16.1700 16.9100 13,060,400
18.9100 19.0900 16.1500 16.3900 27,340,000
28 · 8-K Pre-market · 01:39 ET 8-K ↗
15.5000 15.8200 15.1800 15.4800 6,151,100
Weekend
Weekend
16.4500 16.5810 15.5500 15.6100 3,800,400
16.3700 16.7800 16.0900 16.3800 5,044,600
17.1000 17.4600 16.2500 16.4500 3,889,800
16.9700 17.5000 16.7900 17.1200 4,617,200
18.4000 18.4200 16.6400 16.9000 5,777,800
Weekend
Weekend
17.7350 17.8700 17.3100 17.8500 13,059,500
17.7300 18.1000 17.4200 17.7200 6,133,500
17.5000 17.7500 17.1100 17.3000 6,087,500
18.1600 18.4700 17.1100 17.4000 5,794,700
27 · 8-K Pre-market · 08:44 ET 8-K ↗
18.0700 18.8300 17.9700 18.4200 7,059,000
26 · 8-K Pre-market · 08:37 ET 8-K ↗
Weekend
Weekend
17.2000 17.7000 17.1380 17.5500 4,275,200
17.3000 17.6210 16.8000 17.0000 4,220,400
18.2050 18.3220 17.2400 17.5400 4,802,300
17.4300 17.6900 16.9670 17.2800 7,353,200
No trading
Weekend
Weekend
16.9350 17.6300 16.8000 17.6050 6,946,100
15.5200 17.3500 15.5150 17.1300 14,922,200
25 · 8-K Pre-market · 09:21 ET 8-K ↗
14.1500 14.7200 14.0600 14.6000 3,779,200
13.3800 14.4750 13.3700 14.1600 4,701,900
13.5100 13.7300 13.4400 13.6200 5,424,600
Weekend
Weekend
14.1100 14.2400 13.4300 13.7300 3,905,300
14.3000 14.6500 13.9200 14.3300 4,836,700
14.7500 15.1000 14.1140 14.2300 11,625,800
24 · 8-K Pre-market · 09:17 ET 8-K ↗
13.2700 13.6000 13.0500 13.3600 6,333,700
13.0800 13.2100 12.2200 12.7300 4,389,300
Weekend
Weekend
12.6900 13.5300 12.5700 13.1600 7,072,900
13.0100 13.0200 12.2850 12.4300 6,568,700
13.3100 13.3900 12.9200 13.1100 5,431,200
12.6000 13.0000 12.5300 12.8200 4,603,900
13.0500 13.0700 12.0700 12.7800 9,878,600
Weekend
Weekend
13.6100 13.7050 12.9900 13.3500 9,748,900
15.1600 15.2400 13.9900 14.0000 6,562,500
15.4100 15.7500 14.9950 15.1000 3,676,400
15.0300 15.7300 14.6800 15.1150 4,960,100
14.1400 14.9000 14.1000 14.8700 3,491,600
Weekend
Weekend
13.9000 14.0200 13.5200 13.9600 2,182,600
13.6300 13.9300 13.4350 13.5400 2,487,300
13.9100 13.9570 13.4400 13.5300 3,154,600
23 · 8-K Pre-market · 07:32 ET 8-K ↗
13.2000 13.9800 13.1050 13.7600 3,999,900
13.1050 13.2500 12.7700 13.0450 3,451,600
Weekend
Weekend
13.4400 13.5870 13.0100 13.0200 3,995,100
12.7900 13.5600 12.7200 13.4400 3,815,400
12.6100 13.2400 12.3000 12.8000 3,777,900
13.0100 13.0500 12.2500 12.5500 5,017,500
13.8500 14.2300 13.1000 13.1050 4,231,500
Weekend
Weekend
13.7200 14.4200 13.2000 13.6600 8,153,700
22 · 10-Q After-hours · 16:08 ET 10-Q ↗ 21 · 8-K After-hours · 16:07 ET 8-K ↗ 20 · 8-K After-hours · 16:34 ET 8-K ↗ 19 · 424B5 After-hours · 16:33 ET 424B5 ↗
14.7300 15.2300 14.5800 14.9800 3,283,500
15.1800 15.7050 14.6500 14.7400 4,255,900
18 · 8-K Pre-market · 07:10 ET 8-K ↗
13.6700 14.7150 13.6300 14.6300 3,925,500
13.7400 14.3500 13.4900 13.5000 2,706,500
Weekend
Weekend
13.4600 14.0750 13.3600 13.8100 2,841,100
14.9000 15.0200 13.5350 13.7600 3,754,200
15.6200 15.6200 14.9400 15.0700 2,302,900
15.3450 15.6300 15.2050 15.4700 3,037,000
15.1100 15.4750 14.7900 15.3000 3,391,200
Weekend
Weekend
15.5000 15.5300 14.8600 15.2500 2,724,800
15.6000 15.8800 15.4500 15.4800 2,366,000
15.7500 15.8800 15.3900 15.6900 2,775,800
15.9700 16.0500 15.4600 15.8800 2,798,500
15.5000 15.9400 15.3000 15.9300 3,922,100
Weekend
Weekend
No trading
14.5500 15.6990 14.5500 15.4200 7,100,400
14.5900 14.8000 14.3050 14.3800 3,908,400
14.3200 14.8900 14.3100 14.5700 5,320,500
14.2100 14.5760 14.1150 14.3200 5,979,300
Weekend
Weekend
14.0000 14.2500 13.8800 14.0100 4,183,400
14.2500 14.5300 14.0500 14.1800 4,818,000
14.2500 14.7550 14.1700 14.2500 6,770,000
13.9300 14.8100 13.9300 14.2500 5,963,100
13.7800 14.4000 13.7000 14.2800 7,392,700
Weekend
Weekend
No trading
14.3800 14.6000 13.5600 13.7500 8,723,200
13.9900 14.5000 13.8300 14.0700 5,961,600
14.1300 14.2400 13.7500 13.8800 5,505,400
14.4410 14.5800 13.7000 14.1300 8,529,400
Weekend
Weekend
17 · 8-K After-hours · 16:11 ET 8-K ↗
13.0000 14.1750 12.9200 14.0100 9,844,900
13.6500 13.6900 13.0500 13.0800 9,289,800
16 · 8-K Pre-market · 07:44 ET 8-K ↗
13.1180 14.0500 12.5500 13.0500 8,628,100
15 · 424B5 Next filing day · accepted 09 Jun, 19:37 ET 424B5 ↗ 14 · S-3ASR After-hours · 16:33 ET S-3ASR ↗
14.4700 14.6800 14.0200 14.2900 5,034,900
14.9400 14.9800 13.8100 14.1100 5,493,100
Weekend
Weekend
15.2400 15.3500 14.6550 14.7700 6,516,700
14.9250 15.2100 14.4150 14.8400 5,414,600
14.7500 15.1050 14.2700 15.0700 4,371,800
13 · 8-K Pre-market · 08:01 ET 8-K ↗
15.5300 15.5450 14.1700 14.8600 10,043,900
16.6950 16.8400 15.1700 15.7100 19,587,400
12 · 8-K Pre-market · 06:57 ET 8-K ↗
Weekend
Weekend
17.8700 18.5050 17.3600 17.5400 7,205,400
17.2400 17.8800 16.3200 17.4100 4,361,300
17.1800 17.5050 17.0200 17.3600 2,209,100
16.5800 17.1300 15.8900 17.0000 5,257,400
No trading
Weekend
Weekend
16.4800 17.4000 16.1320 16.6200 6,890,400
17.8600 17.9600 17.1850 17.4700 3,373,900
16.1300 17.9300 16.1300 17.8900 4,630,100
15.8000 16.0100 15.5500 15.8500 2,644,200
16.8700 16.9660 15.5500 16.0200 4,421,300
Weekend
Weekend
17.7800 17.9470 16.8350 16.8700 2,673,100
18.5400 18.8100 17.7860 18.1400 1,971,800
18.8100 19.0800 18.4300 18.7900 2,207,600
18.3000 19.0800 18.2900 18.9500 2,238,400
18.2100 19.4150 18.1500 18.6600 4,233,600
Weekend
Weekend
17.4600 18.1500 17.0610 18.0800 3,878,900
17.9200 18.1500 16.8300 17.1500 2,732,400
17.7200 18.1900 17.2300 17.8500 3,859,500
16.9800 17.7650 16.5500 17.5400 4,487,000
16.3300 17.4200 16.0000 16.9800 6,470,500
Weekend
Weekend
16.0200 16.8100 15.1400 16.1150 18,118,800
11 · 10-Q After-hours · 17:00 ET 10-Q ↗ 10 · 8-K After-hours · 16:40 ET 8-K ↗
20.9400 22.3800 20.8520 21.4600 5,658,200
21.6100 21.6100 20.5500 20.8300 2,760,300
22.0200 22.3950 21.2500 21.2600 2,950,100
22.0800 22.5500 21.8100 22.1200 3,708,600
Weekend
Weekend
22.3000 22.3550 21.4500 22.0800 5,254,000
23.8300 24.7200 22.1400 22.2700 4,971,400
26.6400 26.7700 23.4300 24.5800 8,248,900
25.2200 29.2300 24.9200 26.3800 10,194,500
24.5000 25.4400 23.7400 25.1200 3,371,500
Weekend
Weekend
9 · DEFA14A After-hours · 17:00 ET DEFA14A ↗ 8 · DEF 14A After-hours · 16:12 ET DEF 14A ↗
24.5500 25.4800 24.0600 25.1500 4,899,800
21.2600 24.5350 21.2600 24.4200 6,793,300
21.5000 22.1800 21.0300 21.1200 3,537,500
20.1100 21.0700 20.1000 20.8500 2,325,000
19.6000 20.5100 19.5250 20.0300 2,029,200
Weekend
Weekend
19.3100 19.8900 19.1500 19.6700 2,520,900
18.9700 19.5500 18.8600 19.3100 1,868,300
19.9900 20.1000 18.7500 18.8100 2,088,800
18.5600 19.3000 18.3800 19.2200 1,503,600
7 · PRE 14A After-hours · 16:28 ET PRE 14A ↗
19.1900 19.4450 18.5600 18.6900 1,947,400
Weekend
Weekend
No trading
18.4000 19.8500 18.4000 19.3800 3,077,300
19.1700 19.5900 18.5700 18.9200 2,374,900
17.3000 19.0050 17.2000 18.9600 3,935,400
16.7400 17.5400 16.7400 16.9800 2,688,600
Weekend
Weekend
17.4000 17.5100 16.3800 16.5800 2,080,400
17.4700 18.2400 17.1450 17.2600 4,343,900
15.9300 17.9850 15.8400 17.9400 5,269,300
15.4300 16.1300 15.3600 15.5400 2,108,000
15.7300 16.2100 15.4700 15.6000 2,158,000
Weekend
Weekend
15.7300 16.2800 15.3800 15.5100 3,872,800
15.3900 15.8300 15.2500 15.7200 1,610,300
15.6600 15.8350 15.3800 15.6000 1,743,800
16.1800 16.3350 15.8050 15.8500 2,012,800
16.0700 16.4900 15.7100 16.1750 2,108,600
Weekend
Weekend
15.7000 16.7200 15.6600 16.1200 2,655,800
15.9700 16.1600 15.4500 15.4600 1,703,900
16.1800 16.5400 16.0000 16.0800 1,823,000
15.8700 16.6400 15.8700 16.3300 2,974,200
15.0000 15.8800 14.9700 15.7200 2,720,200
Weekend
Weekend
14.7300 15.3500 14.6000 15.1100 2,307,400
15.0700 15.1500 14.6700 14.9400 2,431,400
15.2900 15.4200 14.9300 15.3800 2,156,800
15.5400 15.7900 15.0800 15.1100 2,280,300
16.0000 16.4050 15.8500 16.1900 1,866,900
Weekend
Weekend
15.6100 16.6100 15.5600 16.5900 2,401,200
15.7200 15.8150 15.3600 15.8000 1,292,200
16.1700 16.5100 15.6400 15.6800 1,529,100
15.7800 16.8000 15.5000 16.1200 2,619,200
6 · 10-K After-hours · 16:10 ET 10-K ↗ 5 · 8-K After-hours · 16:07 ET 8-K ↗
15.7500 16.2700 15.7200 16.0900 2,093,000
Weekend
Weekend
15.6800 16.2100 15.6600 15.9400 2,446,700
15.6700 15.8900 15.3900 15.8700 1,234,700
15.5700 16.1600 15.4900 15.8800 1,488,800
14.8500 15.9900 14.8500 15.6800 1,921,100
No trading
Weekend
Weekend
14.7400 15.5700 14.6700 14.9600 2,165,400
15.3100 15.3850 14.5800 14.6300 2,294,100
15.2700 15.5100 14.6400 15.2500 2,673,100
15.2200 15.7700 15.0300 15.2500 1,932,300
15.0000 15.0800 14.6560 14.9700 1,935,800
Weekend
Weekend
14.1200 15.1100 14.0400 14.9900 2,708,900
14.1000 14.4100 13.8300 13.8500 3,839,900
14.5800 14.7700 14.1100 14.4200 3,709,800
14.1300 14.7670 14.1300 14.5900 3,508,500
14.2100 14.5650 14.0300 14.0600 2,725,200
Weekend
Weekend
15.2000 15.3100 14.4300 14.4800 4,142,200
15.7700 16.3900 15.1700 15.4000 3,446,600
4 · 8-K Pre-market · 07:35 ET 8-K ↗
15.8800 15.8800 15.4500 15.6400 2,539,100
16.5400 16.6500 15.8900 15.9000 2,614,800
16.2900 16.7800 16.0800 16.5600 2,253,200
Weekend
Weekend
17.1400 17.5800 16.4650 16.4900 3,083,600
16.9200 17.9800 16.8700 17.3700 3,546,000
16.1900 17.0200 15.6630 16.8500 3,853,700
16.6500 16.7850 16.0300 16.0600 3,211,000
No trading
Weekend
Weekend
17.2600 17.4800 17.0250 17.0400 2,027,200
17.6500 17.8600 17.2100 17.2700 2,673,200
16.8100 17.7300 16.7650 17.6500 2,849,700
17.1600 17.5000 16.2700 16.8100 4,088,300
19.8550 19.9000 16.4700 17.0400 8,794,900
3 · 8-K Pre-market · 07:43 ET 8-K ↗
Weekend
Weekend
19.0000 20.2000 18.9800 19.6800 2,826,200
18.7900 19.2400 18.5480 18.8300 1,892,100
18.9800 19.5100 18.6600 19.0100 2,656,700
17.5000 19.0000 17.4600 18.6600 4,115,800
17.4900 17.7400 17.2900 17.4400 2,033,000
Weekend
Weekend
17.7500 17.7500 17.3000 17.5200 1,417,500
No trading
17.3600 17.5900 17.1500 17.4900 1,645,400
17.7500 17.8400 17.4100 17.4900 1,458,900
17.9100 18.1500 17.7500 17.7800 1,880,700
Weekend
Weekend
18.3200 18.3600 18.0500 18.1400 1,197,300
No trading
18.1000 18.5290 17.9400 18.3800 1,265,500
17.9800 18.2600 17.7000 18.1200 1,605,700
17.8500 18.3200 17.6700 18.1500 3,223,200
Weekend
Weekend
17.1600 17.9000 17.1450 17.8200 3,595,700
17.2500 17.3800 16.9800 17.0400 1,558,100
17.6500 17.8500 16.9900 17.0100 2,683,400
17.2900 17.5150 16.8700 17.2300 2,018,000
17.7000 17.7600 17.2350 17.3800 2,387,400
Weekend
Weekend
17.9700 18.0250 17.3900 17.5700 1,590,800
17.8500 18.2200 17.7550 17.9900 1,648,700
17.0200 18.0850 16.8100 17.9400 2,974,100
18.3300 18.5300 17.0100 17.0200 4,013,100
18.4400 18.7400 18.1500 18.6250 3,176,600
Weekend
Weekend
18.8800 19.1000 18.0800 18.3100 2,435,500
18.2900 18.9900 18.1900 18.8100 2,782,200
17.3900 19.0500 17.3200 18.3700 4,313,600
17.1900 17.5400 16.7600 17.2500 2,696,300
17.5500 17.8300 17.2450 17.2600 1,895,800
Weekend
Weekend
18.0200 18.1700 17.6600 17.8900 1,388,900
No trading
17.7000 18.0000 17.4550 17.8200 1,399,000
17.8000 17.9800 17.2100 17.6400 1,780,800
16.2300 17.9500 16.2300 17.8400 3,330,100
Weekend
Weekend
16.4000 16.5750 15.6200 16.1900 2,768,000
16.8600 17.2500 15.8800 16.4500 2,700,300
16.8000 17.0200 16.3200 16.5600 1,939,200
16.7100 17.1800 16.4500 16.8100 3,088,800
17.7700 18.0000 16.9300 16.9500 2,606,100
Weekend
Weekend
17.7400 18.5700 17.7400 18.0300 1,445,000
18.7100 18.9000 18.2400 18.2600 1,835,400
19.2700 19.4000 18.6500 18.8300 1,969,600
18.2900 19.2000 18.1600 19.1600 2,356,200
18.3000 18.5300 17.8400 18.3000 2,075,100
Weekend
Weekend
18.1900 18.3100 17.5500 18.1800 2,685,100
2 · 8-K Pre-market · 09:23 ET 8-K ↗
18.0400 18.9900 17.9000 18.4500 2,247,700
17.5800 18.1700 17.3700 18.0700 4,948,100
17.7800 18.1250 17.3700 17.4900 3,433,800
18.7400 19.1800 18.2000 18.2200 2,332,800
Weekend
Weekend
18.7000 19.0000 18.4900 18.9100 2,490,500
18.6600 19.0600 18.4300 18.6400 1,741,800
1 · S-3ASR After-hours · 17:10 ET S-3ASR ↗
19.3400 19.3400 18.3800 18.6600 3,860,600
19.5000 19.7600 19.0330 19.2300 2,104,200
19.8600 20.2400 19.2900 19.4600 3,208,600
Weekend
Weekend
19.8700 20.1200 19.1600 19.2800 3,776,700

Announcement Events

Each title opens the filing on the SEC website. Registered users can summarise the filing and up to seven relevant exhibits linked within the same SEC submission.

30 DEF 14A DEF 14A (opens SEC filing in a new tab) After market open · 11:01 ET Summarise
29 PRE 14A PRE 14A (opens SEC filing in a new tab) After-hours · 21:03 ET Summarise
28 8-K 8-K (opens SEC filing in a new tab) Pre-market · 01:39 ET Summarise
27 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:44 ET Summarise
26 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:37 ET Summarise
25 8-K 8-K (opens SEC filing in a new tab) Pre-market · 09:21 ET Summarise
24 8-K 8-K (opens SEC filing in a new tab) Pre-market · 09:17 ET Summarise
23 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:32 ET Summarise
22 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:08 ET Summarise
21 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:07 ET Summarise
20 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:34 ET Summarise
19 424B5 424B5 (opens SEC filing in a new tab) After-hours · 16:33 ET Summarise
18 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:10 ET Summarise
17 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:11 ET Summarise
16 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:44 ET Summarise
15 424B5 424B5 (opens SEC filing in a new tab) Next filing day · accepted 09 Jun, 19:37 ET Summarise
14 S-3ASR S-3ASR (opens SEC filing in a new tab) After-hours · 16:33 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:01 ET Summarise
12 8-K 8-K (opens SEC filing in a new tab) Pre-market · 06:57 ET Summarise
11 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 17:00 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:40 ET Summarise
9 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 17:00 ET Summarise
8 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:12 ET Summarise
7 PRE 14A PRE 14A (opens SEC filing in a new tab) After-hours · 16:28 ET Summarise
6 10-K 10-K (opens SEC filing in a new tab) After-hours · 16:10 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:07 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:35 ET Summarise
3 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:43 ET Summarise
2 8-K 8-K (opens SEC filing in a new tab) Pre-market · 09:23 ET Summarise
1 S-3ASR S-3ASR (opens SEC filing in a new tab) After-hours · 17:10 ET Summarise