Quantum Biopharma Ltd. - Class B Subordinate Voting Shares QNTM

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

Paper trade (simulated — no real money)

Fill: USD 2.9900 · FX 1 USD = 1.290100 SGD · about SGD 3.8574 per unit

Sign in to place simulated trades. 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 24.88 → 2.99 · -88.0%
29.21015.6552.100 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 48 49 50 51 52,53 Jul 25Oct 25Jan 26Apr 26Jul 26

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

Price & SEC Filing History 26 Jul 2025 — 27 Jul 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
2.8600 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
53 · 6-K After market open · 11:50 ET FORM 6-K ↗
5.0500 5.2400 4.7000 5.1100 609,000
52 · 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
51 · 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
50 · 6-K Pre-market · 07:00 ET FORM 6-K ↗ 49 · 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
48 · 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
47 · 6-K Pre-market · 08:30 ET FORM 6-K ↗
5.0800 6.2100 4.4000 4.4100 1,158,100
46 · 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
45 · 6-K Pre-market · 07:50 ET FORM 6-K ↗
Weekend
Weekend
3.7100 4.9800 3.5100 4.7700 463,500
44 · 6-K Pre-market · 08:10 ET FORM 6-K ↗ 43 · 20-F After-hours · 16:02 ET FORM 20-F ↗
4.2000 4.4070 3.6000 3.8300 281,100
42 · 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
41 · 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
40 · 6-K Pre-market · 08:00 ET FORM 6-K ↗ 39 · 6-K After-hours · 16:23 ET 6-K ↗ 38 · 424B5 After market open · 15:48 ET 424B5 ↗
10.3800 11.4900 10.0500 10.6900 399,900
37 · 6-K Pre-market · 07:00 ET FORM 6-K ↗ 36 · 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
35 · 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
34 · 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
33 · 6-K Pre-market · 07:00 ET FORM 6-K ↗
Weekend
Weekend
12.0000 12.4200 9.4500 9.7000 660,500
32 · 6-K Pre-market · 08:25 ET FORM 6-K ↗
No trading
31 · 6-K After market open · 09:30 ET FORM 6-K ↗
8.7000 11.7600 8.7000 11.4100 1,256,200
30 · 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
29 · 6-K Pre-market · 07:00 ET FORM 6-K ↗ 28 · 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
27 · 6-K Next filing day · accepted 31 Oct, 20:06 ET FORM 6-K ↗
Weekend
Weekend
26 · 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
25 · 6-K Next filing day · accepted 28 Oct, 20:17 ET FORM 6-K ↗ 24 · 6-K Next filing day · accepted 28 Oct, 18:55 ET FORM 6-K ↗ 23 · 6-K Next filing day · accepted 28 Oct, 18:25 ET FORM 6-K ↗ 22 · 6-K/A After market open · 15:46 ET FORM 6-K/A ↗ 21 · 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
14.7500 14.8560 13.8150 13.9000 83,600
14.2700 14.5000 13.6000 14.4400 132,500
20 · 6-K Pre-market · 08:15 ET FORM 6-K ↗
14.5200 14.5450 13.0100 13.6200 61,000
14.3000 14.9950 14.1200 14.6700 41,100
14.3100 15.1300 13.8070 14.4100 70,100
19 · 6-K Pre-market · 08:30 ET FORM 6-K ↗
Weekend
Weekend
14.2400 14.4810 13.7010 14.1600 59,100
15.1400 15.5000 14.7300 15.0700 45,300
16.1600 16.3600 14.8000 15.1500 68,300
15.2900 16.3300 14.8200 15.9900 97,800
18 · 6-K Pre-market · 08:15 ET FORM 6-K ↗
14.4300 15.5170 14.4300 15.1900 74,000
Weekend
Weekend
15.3000 15.9440 14.5000 14.5100 93,400
16.0000 16.0000 15.1100 15.3100 72,500
17.4700 17.5000 15.6400 15.7700 163,200
17 · 6-K Pre-market · 08:00 ET FORM 6-K ↗
17.9000 18.1250 16.5000 17.1800 142,100
18.6700 18.8700 17.6620 17.8750 123,000
Weekend
Weekend
18.5000 19.0000 17.3700 18.4500 182,600
16 · 6-K Pre-market · 07:00 ET FORM 6-K ↗
17.0600 19.3000 16.5190 18.1000 225,400
15 · 6-K Pre-market · 07:57 ET FORM 6-K ↗
16.4800 17.1100 16.0000 16.5300 53,700
14 · 6-K Pre-market · 07:50 ET FORM 6-K ↗
16.0200 16.4550 15.4400 16.4000 67,500
16.0400 16.9800 15.9000 16.1900 100,400
13 · 6-K Pre-market · 07:40 ET FORM 6-K ↗
Weekend
Weekend
17.2300 17.6900 15.5500 16.3200 127,000
17.0000 17.7500 16.5100 17.0700 67,000
18.3500 18.3500 16.6500 17.1300 91,100
12 · 6-K Pre-market · 08:30 ET FORM 6-K ↗
18.4900 19.4220 18.0000 18.3600 81,600
19.1700 19.1700 18.0000 18.4900 88,900
Weekend
Weekend
20.4200 21.0000 18.5100 18.8700 192,000
18.2200 20.2000 18.2200 19.9900 171,500
11 · 6-K Pre-market · 08:10 ET FORM 6-K ↗
16.7600 18.0000 16.4500 17.7700 126,700
17.9100 18.7500 16.4800 16.6500 152,700
16.6600 17.7400 15.6000 17.4000 99,000
Weekend
Weekend
14.8500 17.5000 14.8500 17.2300 149,000
10 · 6-K Pre-market · 07:50 ET FORM 6-K ↗
15.5200 16.4000 15.0000 16.0200 207,300
13.1600 17.7900 12.9100 16.1700 482,600
9 · 6-K Pre-market · 07:00 ET FORM 6-K ↗
12.7400 13.4450 12.5200 12.6900 122,500
13.8500 13.8950 12.1400 13.0000 221,500
Weekend
Weekend
14.5800 14.6350 13.7000 14.0550 117,600
15.3800 15.6900 14.0700 14.2900 120,300
16.7500 16.8600 15.5100 15.7000 162,400
17.0000 17.6500 16.2060 16.3050 98,200
No trading
Weekend
Weekend
17.4000 17.5000 16.4800 16.8500 55,200
16.9600 18.0800 16.5600 17.2500 90,000
16.0000 18.1290 16.0000 16.7500 98,200
17.7800 17.9200 16.2500 16.3500 105,400
18.2000 18.4450 17.4800 17.7050 70,000
Weekend
Weekend
18.0700 18.8370 17.5000 18.0850 78,100
18.2200 19.4800 17.8500 18.0500 87,100
8 · 6-K Pre-market · 07:00 ET FORM 6-K ↗
17.8300 18.8600 17.5000 18.1400 100,300
20.4300 20.9400 17.8000 18.0300 229,200
22.3500 22.4700 20.4300 20.6150 97,200
Weekend
Weekend
22.1400 22.5650 21.0100 22.4500 121,300
23.0000 23.6550 21.7250 22.3500 123,400
24.6000 25.3000 22.7500 23.2500 238,100
26.5000 27.0000 21.7500 24.3300 451,000
30.7600 31.9140 25.3000 26.2600 371,400
7 · 6-K Pre-market · 07:40 ET FORM 6-K ↗
Weekend
Weekend
27.8100 29.2450 26.9400 29.2100 217,300
6 · 6-K Pre-market · 08:00 ET FORM 6-K ↗
28.0000 30.7500 25.2400 26.0100 342,400
5 · 6-K Next filing day · accepted 06 Aug, 17:38 ET FORM 6-K ↗ 4 · 6-K Pre-market · 07:00 ET FORM 6-K ↗
25.3200 26.5000 24.3700 26.1400 122,700
26.8700 27.4400 24.2000 24.5700 244,600
3 · 6-K Pre-market · 07:34 ET FORM 6-K ↗
24.0100 28.1500 23.7200 27.8000 231,300
2 · 6-K Pre-market · 07:33 ET FORM 6-K ↗
Weekend
Weekend
22.9000 24.7000 21.6200 23.7000 131,900
23.1000 24.7000 22.8000 23.4700 92,300
1 · 6-K Pre-market · 07:24 ET FORM 6-K ↗
22.8700 24.2500 22.3580 22.7100 75,200
25.0000 25.3500 22.0000 22.4450 187,300
24.9400 26.7200 24.5700 24.8800 143,900
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.