Quantum Biopharma Ltd. - Class B Subordinate Voting Shares QNTM

Open calendar →

Quantum Biopharma Ltd. - Class B Subordinate Voting Shares · Company · Nasdaq · Healthcare / Biotechnology

Paper trade (simulated — no real money)

Fill: USD 2.2400 · FX 1 USD = 1.278120 SGD · about SGD 2.8630 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 13.43 → 2.24 · -83.3%
13.4307.7652.100 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 31 32,33 34 35,36 37 38 39,40,41 42 43,44 45 46 47 Oct 25Jan 26Apr 26Jul 26Oct 26

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

Price & SEC Filing History 25 Oct 2025 — 26 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.

No data yet
Weekend
Weekend
2.2600 2.3660 2.2400 2.2400 42,600
2.3700 2.4300 2.2500 2.2700 150,100
2.4500 2.4800 2.3700 2.4000 90,400
2.4200 2.5500 2.4080 2.4300 51,400
2.4900 2.5500 2.4000 2.4100 63,300
Weekend
Weekend
2.6800 2.7470 2.4600 2.4700 190,400
2.6500 2.7400 2.6000 2.7100 107,400
2.8500 2.8890 2.6600 2.6600 180,300
2.8300 2.9700 2.8000 2.8900 82,800
2.9800 3.0000 2.8000 2.8200 157,500
Weekend
Weekend
3.1100 3.1100 2.9400 2.9400 129,500
47 · 6-K After market open · 12:00 ET FORM 6-K ↗
3.1000 3.2300 3.1000 3.1100 77,300
3.0700 3.1600 3.0200 3.1450 149,400
46 · 6-K After market open · 10:00 ET FORM 6-K ↗
3.3400 3.3900 3.0500 3.0900 618,800
3.4000 3.4900 3.2500 3.2700 245,900
Weekend
Weekend
3.3800 3.4700 3.3200 3.4400 79,200
3.5600 3.6630 3.4000 3.4250 82,700
3.7200 3.8000 3.5300 3.6000 110,300
3.9500 3.9570 3.7070 3.8200 119,600
3.8600 3.9900 3.6720 3.9600 139,800
Weekend
Weekend
4.0000 4.0000 3.8000 3.8500 193,400
45 · 6-K After market open · 12:00 ET FORM 6-K ↗
4.0000 4.3000 3.8230 4.0000 563,800
3.6500 4.3400 3.6500 3.8800 643,800
3.6600 3.9000 3.6000 3.7000 193,700
3.6500 3.8200 3.5200 3.6100 78,600
Weekend
Weekend
3.6900 3.8300 3.6150 3.6600 95,100
44 · 6-K After market open · 15:12 ET FORM 6-K ↗
3.6300 3.8800 3.6300 3.7200 191,700
43 · 6-K Pre-market · 08:00 ET FORM 6-K ↗
3.4800 3.6900 3.3860 3.6500 199,100
3.4300 3.5000 3.2500 3.4600 101,500
42 · 6-K Pre-market · 08:00 ET FORM 6-K ↗
3.2200 3.5900 3.1350 3.4600 173,400
Weekend
Weekend
3.3200 3.3900 3.2000 3.2000 200,700
3.5400 3.6000 3.0820 3.2900 238,500
3.3400 3.7390 3.3300 3.5800 445,400
41 · 6-K/A After market open · 12:39 ET FORM 6-K/A ↗ 40 · 6-K/A After market open · 12:39 ET FORM 6-K/A ↗ 39 · 6-K/A After market open · 12:38 ET FORM 6-K/A ↗
3.2800 3.3700 3.0600 3.2900 131,100
No trading
Weekend
Weekend
3.0100 3.2700 2.9900 3.2400 110,800
3.1000 3.1900 2.9100 2.9500 114,200
3.0700 3.1400 3.0000 3.0800 51,400
38 · 6-K Next filing day · accepted 01 Sep, 20:28 ET FORM 6-K ↗
3.1400 3.2330 3.0200 3.0400 82,700
3.0200 3.2300 3.0200 3.1700 81,500
Weekend
Weekend
3.1500 3.2100 3.0700 3.0750 87,300
3.0800 3.2400 3.0300 3.1300 58,300
3.2800 3.3700 3.0600 3.0700 124,200
3.3600 3.4300 3.1200 3.2800 143,200
3.4400 3.4500 3.1260 3.2400 205,400
Weekend
Weekend
3.4900 3.5800 3.3500 3.4400 137,600
3.5200 3.5200 3.3600 3.4400 149,700
3.6100 3.8500 3.2700 3.5200 280,400
3.6800 3.7310 3.2300 3.3400 310,800
3.9800 4.2000 3.4650 3.6800 1,223,500
Weekend
Weekend
3.3400 3.9500 3.3100 3.8000 277,300
37 · 6-K Pre-market · 07:00 ET FORM 6-K ↗ 36 · 6-K After-hours · 16:06 ET FORM 6-K ↗ 35 · 6-K/A After market open · 11:07 ET FORM 6-K/A ↗
3.4300 3.4700 3.1100 3.2300 223,300
3.6000 3.6700 3.3700 3.4800 152,100
3.5200 3.8350 3.4700 3.5500 475,000
3.4000 4.0800 3.2400 3.4600 1,827,200
34 · 6-K Pre-market · 07:00 ET FORM 6-K ↗
Weekend
Weekend
3.2900 3.7000 3.2200 3.4500 181,600
2.9000 3.2500 2.8100 3.2300 64,300
2.9200 3.0000 2.7710 2.9000 91,200
3.0000 3.0500 2.6600 2.8700 230,000
2.9600 3.1200 2.8800 3.0500 44,800
Weekend
Weekend
2.9500 2.9600 2.7700 2.8900 50,100
2.8300 2.9800 2.8300 2.8400 48,200
2.9600 2.9800 2.7300 2.8300 91,600
2.9700 3.1450 2.9000 3.0000 48,900
2.9500 2.9900 2.8400 2.9700 31,000
Weekend
Weekend
2.8600 2.9900 2.7800 2.9900 37,300
2.8100 2.9500 2.6950 2.8400 180,900
2.9600 3.0370 2.8200 2.8500 84,100
3.0400 3.1200 2.9600 3.0200 99,900
3.1900 3.2700 2.9900 3.0400 222,400
Weekend
Weekend
3.3100 3.4000 3.2050 3.2400 101,000
3.3800 3.4900 3.3400 3.3700 63,500
3.4100 3.5000 3.3300 3.4000 53,900
3.4900 3.5500 3.4000 3.4900 46,300
3.3300 3.6300 3.3300 3.5300 63,700
Weekend
Weekend
3.3900 3.4800 3.2300 3.3100 115,700
3.2300 3.4800 3.2300 3.4100 63,700
3.3100 3.3600 3.1100 3.2700 97,700
3.4200 3.4300 3.2810 3.3200 57,900
3.5400 3.6700 3.3800 3.4400 79,700
Weekend
Weekend
No trading
3.3700 3.5900 3.3700 3.5100 114,300
3.6200 3.7100 3.2100 3.3600 216,400
3.6500 3.7320 3.5300 3.6200 75,500
3.8100 3.8850 3.6000 3.7000 87,700
Weekend
Weekend
3.9300 4.0100 3.6390 3.8000 104,300
4.0000 4.1400 3.8500 3.9300 114,900
3.8300 4.3980 3.8110 3.9100 482,000
3.5000 4.0600 3.5000 3.8500 192,000
3.7000 3.8400 3.5400 3.6600 110,100
Weekend
Weekend
No trading
4.1500 4.1500 3.7000 3.8000 166,400
3.6700 4.2200 3.6190 3.9700 245,500
3.7000 3.7200 3.5200 3.6400 95,700
3.8100 3.9400 3.6600 3.7000 171,200
Weekend
Weekend
4.0400 4.1000 3.7800 3.8300 118,200
3.8600 4.1250 3.7100 4.0000 194,900
3.8400 4.2500 3.8400 3.9300 187,600
4.0800 4.1000 3.5900 3.8900 322,000
4.3000 4.5800 3.9000 4.0500 264,900
Weekend
Weekend
4.4900 4.4900 4.0200 4.2600 382,600
4.7600 5.0760 4.1810 4.4800 586,500
5.4200 5.4500 4.7000 4.8800 356,300
33 · 6-K After market open · 11:50 ET FORM 6-K ↗
5.0500 5.2400 4.7000 5.1100 609,000
32 · 6-K Pre-market · 07:40 ET FORM 6-K ↗
6.7000 6.7100 5.2500 5.2500 698,300
Weekend
Weekend
7.1100 7.2400 6.6500 6.8600 187,700
7.5600 7.6150 6.4300 7.0200 542,500
7.1000 7.8300 6.6200 7.6400 550,400
10.5100 10.8100 6.5610 7.0500 1,778,300
No trading
Weekend
Weekend
7.8000 9.3000 7.2100 9.2400 830,500
8.1000 8.2500 7.4500 7.8100 478,900
7.2300 8.2400 6.7000 7.8100 476,300
6.5800 7.1800 6.3510 7.0000 335,600
7.4500 7.6900 6.0700 6.2700 499,900
31 · 6-K Pre-market · 06:00 ET FORM 6-K ↗
Weekend
Weekend
6.7800 7.4000 6.6000 6.8100 380,100
5.5500 7.2500 5.4600 6.8700 827,800
5.1900 5.7000 5.0800 5.4700 157,600
5.0900 5.3380 4.8900 5.2000 121,400
4.7900 5.3400 4.6000 5.0600 172,800
Weekend
Weekend
4.9300 5.0100 4.7000 4.8800 118,000
5.2500 5.4050 4.8500 5.0100 184,600
30 · 6-K Pre-market · 07:00 ET FORM 6-K ↗ 29 · 6-K After-hours · 16:14 ET FORM 6-K ↗
5.1700 5.5400 5.1700 5.2800 207,600
5.2300 5.5900 5.1500 5.3600 244,100
5.5200 5.7300 5.0200 5.2000 128,700
Weekend
Weekend
5.7300 6.1590 5.3870 5.5500 359,600
5.6500 5.9000 5.0000 5.7300 487,600
5.4300 5.7000 4.6200 5.6500 671,700
4.3600 5.6000 4.3600 5.3700 932,200
3.6500 4.9800 3.6100 4.4500 1,965,700
Weekend
Weekend
3.2600 3.6500 3.1800 3.6100 248,700
3.3400 3.3730 3.1100 3.2100 138,400
28 · 6-K After market open · 09:31 ET FORM 6-K ↗
3.5300 3.9000 3.2000 3.3500 442,200
3.2000 3.9400 3.1500 3.4400 1,191,200
3.1500 3.2000 3.0500 3.1200 77,500
Weekend
Weekend
3.2400 3.3200 3.0500 3.1200 155,900
3.1200 3.3300 3.0700 3.1700 197,800
2.9700 3.2600 2.9700 3.0700 208,200
3.3600 3.4400 2.8000 3.0200 431,200
3.5100 3.6800 3.2600 3.3550 143,800
Weekend
Weekend
3.2600 3.6780 3.2500 3.5250 111,300
3.6700 3.7600 3.1800 3.2700 203,200
4.0100 4.1200 3.6000 3.6800 254,200
3.6100 3.9900 3.5300 3.8800 174,200
3.9200 3.9500 3.5400 3.5800 264,000
Weekend
Weekend
No trading
4.4500 4.6000 3.8700 3.9800 443,800
27 · 6-K Pre-market · 08:30 ET FORM 6-K ↗
5.0800 6.2100 4.4000 4.4100 1,158,100
26 · 6-K Pre-market · 08:02 ET FORM 6-K ↗
4.2200 4.8600 3.8100 4.8300 415,000
5.0500 6.4700 3.9500 4.2800 2,256,000
25 · 6-K Pre-market · 07:50 ET FORM 6-K ↗
Weekend
Weekend
3.7100 4.9800 3.5100 4.7700 463,500
24 · 6-K Pre-market · 08:10 ET FORM 6-K ↗ 23 · 20-F After-hours · 16:02 ET FORM 20-F ↗
4.2000 4.4070 3.6000 3.8300 281,100
22 · 6-K Pre-market · 08:00 ET FORM 6-K ↗
4.7700 5.6500 4.2100 4.3500 1,172,600
3.0400 4.8300 3.0100 4.7300 2,943,000
2.2100 3.3500 2.1800 3.1000 1,408,600
21 · 6-K Pre-market · 08:24 ET FORM 6-K ↗
Weekend
Weekend
2.3200 2.3800 2.2000 2.2400 73,100
2.3100 2.4000 2.3100 2.3600 43,000
2.3700 2.4600 2.3300 2.4000 72,300
2.4100 2.4150 2.2800 2.3950 78,000
2.4700 2.4800 2.3200 2.3600 178,800
Weekend
Weekend
2.4700 2.6100 2.3520 2.4800 278,600
2.2300 3.2000 2.1100 2.5600 3,184,900
2.9400 3.0460 2.0700 2.1000 822,900
3.3600 3.5100 2.8000 2.8000 340,600
3.4000 3.4800 3.3200 3.3600 37,400
Weekend
Weekend
3.5300 3.7500 3.4500 3.5000 53,700
3.8000 3.8000 3.5300 3.5900 28,500
3.7600 3.9000 3.6500 3.8000 42,200
3.6000 3.8000 3.5700 3.7500 30,600
3.5000 3.6500 3.4100 3.6000 45,500
Weekend
Weekend
3.5500 3.7590 3.5100 3.5500 31,700
3.7700 3.8300 3.5500 3.5800 30,000
3.8100 3.8550 3.7300 3.7900 24,900
3.5300 3.8350 3.5300 3.8100 23,100
3.6500 3.7300 3.5200 3.5400 50,600
Weekend
Weekend
3.7200 4.0000 3.6300 3.6900 34,700
3.7200 3.7800 3.6450 3.7200 22,700
3.6500 3.8000 3.5130 3.6400 53,900
3.7000 4.0000 3.6300 3.7100 51,600
No trading
Weekend
Weekend
3.6600 3.8500 3.6200 3.6400 21,100
3.8500 3.9810 3.6500 3.6500 44,100
4.0000 4.0400 3.8000 3.8500 41,100
3.9300 4.0400 3.9050 3.9500 29,000
4.0100 4.0500 3.8000 3.9400 50,300
Weekend
Weekend
3.9600 4.2900 3.9000 4.2000 105,500
3.8800 4.1500 3.7500 3.9200 80,600
4.0500 4.2900 3.8580 4.0000 191,400
4.2400 4.3000 4.0000 4.0300 65,000
4.6000 4.6000 4.0700 4.2400 123,900
Weekend
Weekend
4.9000 4.9830 4.5000 4.5800 48,500
4.8500 5.0500 4.6300 4.8700 51,300
5.2000 5.2880 4.8000 4.9100 82,300
5.3700 5.4700 5.0840 5.1500 71,200
6.1800 6.1800 5.2500 5.3900 116,100
Weekend
Weekend
6.3000 6.4700 6.0100 6.1800 46,000
6.6000 6.7670 6.0500 6.3000 69,600
7.0000 7.2100 6.2500 6.4200 67,700
7.0000 7.2900 6.9280 7.2200 82,400
No trading
Weekend
Weekend
6.9600 7.1800 6.8700 7.0500 28,100
6.9000 7.0500 6.8500 6.9600 39,800
7.1000 7.3360 6.9380 7.0100 47,800
7.1000 7.5000 6.8600 7.4300 55,900
6.9400 7.2200 6.9300 6.9600 40,600
Weekend
Weekend
7.4450 7.4610 6.9100 6.9300 39,900
7.3400 7.6000 7.2200 7.2600 63,200
7.0000 7.6500 6.9100 7.6000 72,000
7.1000 7.3000 6.8600 7.0100 51,500
7.0000 7.5000 6.8550 7.2300 91,900
Weekend
Weekend
7.0000 7.1400 6.5000 7.0100 68,800
No trading
7.0000 7.8800 6.9000 7.3000 119,100
8.0000 8.0880 7.0500 7.3300 103,000
8.3000 8.4000 8.0000 8.0400 55,100
Weekend
Weekend
8.6200 9.0000 8.0290 8.3000 64,200
No trading
9.2900 9.2900 8.6300 8.6900 48,800
10.7500 10.8100 9.3400 9.4600 133,600
20 · 6-K Pre-market · 08:00 ET FORM 6-K ↗ 19 · 6-K After-hours · 16:23 ET 6-K ↗ 18 · 424B5 After market open · 15:48 ET 424B5 ↗
10.3800 11.4900 10.0500 10.6900 399,900
17 · 6-K Pre-market · 07:00 ET FORM 6-K ↗ 16 · 6-K Next filing day · accepted 19 Dec, 17:41 ET FORM 6-K ↗
Weekend
Weekend
8.8000 9.0000 8.4500 8.8900 46,500
8.8900 8.9000 8.3500 8.8200 59,600
8.7900 9.1730 8.1100 8.2800 76,500
7.7000 8.7000 7.7000 8.6500 37,800
9.4100 9.6800 7.5200 7.7500 58,300
Weekend
Weekend
9.9400 9.9790 9.2000 9.3800 19,400
15 · 6-K/A After market open · 10:14 ET 6-K/A ↗
10.3300 10.9380 9.4700 9.8400 79,000
10.9800 11.0000 10.5100 10.6100 74,400
10.0100 10.7020 9.8600 10.6300 52,000
14 · 6-K After market open · 14:39 ET 6-K ↗
10.1000 10.1900 9.5100 10.1300 34,600
Weekend
Weekend
9.6500 10.1700 9.5600 10.0400 70,500
10.0000 10.0770 9.4300 10.0000 64,700
10.0000 10.5000 9.2200 9.9900 96,700
8.2000 10.0190 8.0100 9.7000 111,400
9.9100 9.9100 8.2900 8.5700 170,800
13 · 6-K Pre-market · 07:00 ET FORM 6-K ↗
Weekend
Weekend
12.0000 12.4200 9.4500 9.7000 660,500
12 · 6-K Pre-market · 08:25 ET FORM 6-K ↗
No trading
11 · 6-K After market open · 09:30 ET FORM 6-K ↗
8.7000 11.7600 8.7000 11.4100 1,256,200
10 · 6-K After-hours · 16:00 ET FORM 6-K ↗
6.2700 8.0400 6.0500 8.0400 182,600
6.2300 6.4500 6.0300 6.2000 59,600
Weekend
Weekend
6.2000 6.5000 5.5700 5.7600 57,500
6.5200 6.8000 6.1000 6.1900 79,800
6.9900 7.1970 6.1100 6.3100 94,200
7.0700 7.2500 6.5000 6.7900 103,900
7.3600 8.3580 7.1800 7.2100 59,000
Weekend
Weekend
7.5800 7.6380 6.8250 7.3600 74,500
8.2200 8.4850 7.5100 7.6900 47,000
8.5100 9.1200 8.1100 8.3300 32,600
8.0600 8.9620 8.0600 8.6150 34,700
9.0000 9.1980 8.3100 8.3900 46,600
Weekend
Weekend
8.0400 9.0200 8.0300 8.9100 40,900
9 · 6-K Pre-market · 07:00 ET FORM 6-K ↗ 8 · 6-K After-hours · 16:29 ET FORM 6-K ↗
9.0000 9.0460 8.0330 8.5900 62,700
8.9800 9.5000 8.9200 9.0000 38,100
10.0000 10.0000 8.5500 8.9100 116,400
10.7400 10.7400 9.3320 10.5200 101,200
7 · 6-K Next filing day · accepted 31 Oct, 20:06 ET FORM 6-K ↗
Weekend
Weekend
6 · 424B5 After-hours · 17:29 ET 424B5 ↗
12.2100 12.4600 11.0000 11.0700 88,300
12.5100 13.3670 11.5000 12.5400 44,100
12.9600 13.8800 12.7500 12.8500 52,300
5 · 6-K Next filing day · accepted 28 Oct, 20:17 ET FORM 6-K ↗ 4 · 6-K Next filing day · accepted 28 Oct, 18:55 ET FORM 6-K ↗ 3 · 6-K Next filing day · accepted 28 Oct, 18:25 ET FORM 6-K ↗ 2 · 6-K/A After market open · 15:46 ET FORM 6-K/A ↗ 1 · 6-K/A After market open · 15:36 ET FORM 6-K/A ↗
13.3500 13.7500 12.7500 12.9600 65,100
13.9500 14.8510 13.3000 13.4300 80,100
Weekend
Weekend

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.