Quantum Computing Inc QUBT

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Quantum Computing Inc. - Common Stock · Company · Nasdaq · Technology / Computer Hardware

Paper trade (simulated — no real money)

Fill: USD 6.5600 · FX 1 USD = 1.278120 SGD · about SGD 8.3845 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 15.72 → 6.56 · -58.3%
16.71011.5106.310 1,2 3 4 5 6 7,8 9 10 11 12,13 14,15 16 17 18 19 20,21 22 23 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
6.5400 6.6250 6.4000 6.5600 4,129,500
6.5300 6.8100 6.5100 6.5900 4,744,900
6.6500 6.8550 6.5550 6.8200 5,182,000
6.3400 6.7700 6.3200 6.5000 6,240,400
6.5700 6.6050 6.2900 6.4200 7,431,000
Weekend
Weekend
6.7400 6.8200 6.3500 6.3600 8,828,800
6.0950 6.8600 6.0800 6.8400 11,456,800
6.6550 6.7300 6.3000 6.3100 8,384,800
6.7700 6.9300 6.6400 6.8700 6,647,900
7.3800 7.3800 6.9200 6.9300 7,673,500
Weekend
Weekend
7.5650 7.5750 7.3400 7.4400 5,025,800
7.5350 7.6150 7.3300 7.4500 8,035,100
7.6700 7.7450 7.5100 7.6200 7,313,600
8.0400 8.3600 7.8500 7.8600 7,758,000
8.2000 8.2300 7.8300 7.9400 8,297,400
Weekend
Weekend
23 · 8-K After-hours · 16:26 ET CURRENT REPORT ↗
8.7350 8.7600 8.1100 8.1800 7,221,100
8.5150 8.5700 8.3200 8.3900 4,434,600
8.5400 8.8300 8.4350 8.4500 5,586,600
8.7650 8.7700 8.4500 8.4600 4,550,000
8.8200 9.0100 8.5150 8.5700 6,671,900
Weekend
Weekend
9.0650 9.2800 8.9300 8.9600 8,079,400
8.8600 9.2900 8.8600 9.1600 9,811,100
9.6700 9.7600 9.0450 9.1200 14,942,900
9.0800 9.1000 8.8660 9.0800 6,686,000
9.0000 9.1300 8.8500 8.9600 8,412,000
Weekend
Weekend
8.6100 8.7300 8.2600 8.7000 9,769,100
8.2900 8.5400 8.1750 8.4400 7,645,900
7.8900 8.0500 7.7900 8.0000 5,191,800
7.8200 8.0400 7.7800 7.8400 4,794,400
7.6300 8.1700 7.6300 7.9700 5,542,500
Weekend
Weekend
7.9400 8.1400 7.8150 7.9900 4,766,500
7.9200 8.0600 7.7700 7.8200 6,466,200
8.1150 8.3150 8.0300 8.0400 5,292,400
22 · 8-K/A After-hours · 16:01 ET AMENDMENT NO. 1 TO FORM 8-K ↗
8.3300 8.5950 8.2100 8.2200 10,190,100
No trading
Weekend
Weekend
7.9300 8.0300 7.8400 8.0100 3,671,700
7.8900 8.0700 7.8700 7.9600 4,699,300
7.8100 8.0000 7.8000 7.8400 7,061,300
7.9960 8.1160 7.8300 7.9000 5,886,200
8.0950 8.3490 8.0800 8.2300 4,537,900
Weekend
Weekend
8.5200 8.6350 8.0700 8.1500 7,542,300
8.6100 8.7800 8.4200 8.6500 7,491,700
8.4300 8.5800 8.2900 8.3500 4,969,800
8.4480 8.6200 8.2200 8.4600 5,637,300
8.6200 8.7200 8.1800 8.2400 8,452,000
Weekend
Weekend
8.2400 8.9500 8.2400 8.9200 13,920,900
8.4700 8.5600 8.0350 8.1400 8,046,900
8.3600 8.5000 8.1400 8.4200 6,604,400
8.5000 8.9350 8.4500 8.5200 7,453,300
8.9200 9.1800 8.7300 9.0500 6,943,000
Weekend
Weekend
8.7900 9.1000 8.7600 9.0100 7,294,900
8.8700 9.2600 8.7850 8.9200 9,700,300
9.1500 9.2400 8.7750 8.9200 7,844,000
9.1600 9.1600 8.7000 8.9500 8,827,600
21 · 10-Q After-hours · 16:08 ET 10-Q ↗ 20 · 8-K After-hours · 16:23 ET CURRENT REPORT ↗
9.1700 9.2450 8.8600 8.9300 9,705,000
Weekend
Weekend
8.9400 9.2050 8.7500 9.1800 9,182,700
8.5200 8.9700 8.4700 8.7750 5,813,100
9.1200 9.2300 8.8500 8.8800 6,208,500
8.9800 9.3500 8.9200 9.2300 12,954,600
8.1050 8.7450 8.0000 8.7400 10,064,600
Weekend
Weekend
8.1700 8.3850 7.9200 8.1000 10,482,000
7.6050 8.0400 7.5300 8.0200 8,417,800
7.6000 7.8050 7.3000 7.3000 8,505,600
7.7500 7.8750 7.3000 7.7200 8,655,900
7.7300 8.1700 7.6800 7.9600 10,494,800
Weekend
Weekend
7.8500 7.8800 7.4100 7.4300 7,303,300
7.7600 8.0800 7.7000 7.8600 6,243,100
19 · 8-K After market open · 13:00 ET CURRENT REPORT ↗
8.1950 8.2550 7.7950 7.9100 8,273,000
8.0700 8.2600 7.9500 8.2200 8,536,100
7.8600 8.0500 7.7160 7.9200 8,525,300
Weekend
Weekend
7.4650 8.0800 7.4100 7.8000 10,574,300
7.9550 7.9950 7.5400 7.6400 10,010,000
8.3000 8.4950 7.9100 8.0400 7,389,700
8.1800 8.3200 8.0500 8.3200 7,535,800
8.5000 8.5100 7.9240 8.0000 11,149,200
Weekend
Weekend
9.1800 9.2300 8.5950 8.6600 8,458,700
8.8000 9.3300 8.7500 9.1500 8,755,400
8.5250 8.9000 8.4950 8.7500 8,226,800
9.1500 9.1800 8.4750 8.6900 13,855,100
9.0900 9.5700 9.0000 9.3700 8,618,600
Weekend
Weekend
No trading
9.5450 9.8750 8.9400 9.0500 12,069,800
9.6900 10.0200 9.4100 9.4300 11,491,000
9.6900 9.8800 9.4400 9.7000 11,542,000
18 · 8-K Next filing day · accepted 29 Jun, 18:46 ET CURRENT REPORT ↗
9.3450 10.1000 9.1700 9.9200 17,158,200
Weekend
Weekend
8.9500 9.3800 8.8300 9.1800 16,345,300
10.0500 10.1900 9.0000 9.0900 14,920,100
10.2700 10.3530 9.6100 9.7000 19,047,300
10.3900 11.2300 10.2100 10.4900 22,835,500
17 · 8-K Pre-market · 08:55 ET CURRENT REPORT ↗
10.5500 11.3000 10.4450 10.5400 17,242,300
Weekend
Weekend
No trading
10.2300 10.8100 9.8800 10.7600 21,444,500
10.3100 10.4350 9.6800 9.7700 12,932,700
10.8350 10.9300 9.9900 10.1200 16,580,800
10.7400 11.5150 10.6000 11.1000 24,704,800
Weekend
Weekend
10.0100 10.4900 9.6800 9.9300 12,384,000
9.4800 10.0500 9.3300 9.9100 13,028,600
9.3900 10.0900 9.3200 9.5300 13,687,400
10.3700 10.6600 9.0650 9.5050 17,771,900
10.3000 10.6300 9.9500 10.4500 12,412,500
Weekend
Weekend
10.9000 10.9000 9.8100 9.9550 21,673,600
11.0000 11.4080 10.7300 11.1900 17,495,300
11.9500 12.3500 11.1700 11.2000 22,087,700
12.2450 12.6980 11.8200 12.2500 25,479,600
11.6700 13.0000 11.0300 12.3900 32,254,600
Weekend
Weekend
12.0000 12.0990 11.4800 11.9600 21,438,100
11.3950 12.3850 11.3200 12.2400 30,904,200
11.5500 11.8200 11.1200 11.4200 20,366,900
12.4750 12.5300 11.2650 11.6800 34,034,000
No trading
Weekend
Weekend
11.6150 13.3900 11.6100 12.3100 68,053,900
10.4700 11.4450 10.3200 11.4100 57,198,100
9.3200 9.6600 9.1850 9.5600 13,615,900
9.5500 9.7700 9.1400 9.2200 11,586,700
16 · 8-K After-hours · 16:47 ET CURRENT REPORT ↗
10.5000 10.5000 9.4300 9.7150 18,177,700
Weekend
Weekend
11.2400 11.2400 10.5000 10.5050 21,801,200
10.8100 12.3200 10.5400 11.7300 36,851,500
11.6950 11.7200 10.8450 11.0300 36,152,600
12.7000 14.4500 11.2900 11.7800 141,078,800
15 · 10-Q After-hours · 16:06 ET QUARTERLY REPORT ↗ 14 · 8-K After-hours · 16:05 ET CURRENT REPORT ↗
9.4920 10.3150 9.3300 10.1800 31,560,900
Weekend
Weekend
9.8150 9.9500 9.2200 9.6000 12,801,000
10.0550 10.2250 9.3700 9.6300 13,437,600
9.7000 10.5300 9.5900 10.4600 19,566,500
9.5850 9.6200 9.1500 9.5600 9,078,900
9.1500 9.8800 9.1400 9.5000 13,368,400
Weekend
Weekend
9.0100 9.2300 8.8400 9.2100 10,240,100
13 · DEFA14A After-hours · 16:32 ET DEFINITIVE ADDITIONAL MATERIALS ↗ 12 · DEF 14A After-hours · 16:31 ET PROXY STATEMENT ↗
8.3300 9.0850 8.1900 9.0200 11,042,700
8.5200 8.5200 7.9800 8.2800 11,370,400
8.8300 8.8800 8.4100 8.5700 8,744,700
8.8150 9.1200 8.7050 9.1000 7,438,700
Weekend
Weekend
9.2580 9.2700 8.5900 8.9400 13,060,000
9.7100 9.8950 8.8800 9.0500 18,933,600
9.5900 10.1700 9.5610 9.8600 16,293,600
10.0050 10.1000 9.3900 9.4100 18,006,600
11 · PRE 14A After-hours · 17:16 ET PROXY STATEMENT ↗
9.3500 9.9400 9.2800 9.8300 19,699,300
Weekend
Weekend
10 · 8-K/A After-hours · 16:55 ET AMENDMENT NO. 1 TO FORM 8-K ↗
9.5700 9.9050 9.3450 9.5700 22,053,500
9.7650 9.7900 9.0100 9.4400 33,663,300
8.5500 9.7100 8.4100 9.4000 43,699,500
7.5950 8.3300 7.5220 8.1100 23,177,400
6.8700 7.3000 6.7800 7.2700 7,159,600
Weekend
Weekend
6.9300 7.2800 6.8700 7.0600 7,924,200
6.8600 6.9500 6.7500 6.7800 5,419,800
7.3800 7.4800 6.8450 6.9300 8,431,000
6.7300 6.7800 6.5350 6.7700 8,096,200
6.8400 7.0790 6.7800 6.8600 6,272,000
Weekend
Weekend
No trading
6.4000 6.8700 6.3400 6.8700 7,255,500
6.9650 7.0400 6.6100 6.6400 8,064,600
6.4550 6.9400 6.4550 6.8500 13,443,300
6.7200 6.7450 6.1800 6.3100 8,288,600
Weekend
Weekend
6.9600 7.0150 6.6300 6.6600 9,791,200
7.1100 7.3900 7.1000 7.1200 6,903,400
7.6200 7.7100 7.1400 7.3200 8,600,800
7.2000 7.5290 7.0700 7.4500 8,544,500
6.9750 7.3900 6.9300 7.3400 12,101,800
Weekend
Weekend
7.0700 7.2000 6.8500 6.9600 9,311,100
7.0100 7.3680 6.8800 7.1900 9,823,600
7.4800 7.5050 7.1950 7.2500 8,536,800
7.3500 7.5750 7.3000 7.5400 8,121,000
7.4950 7.6700 7.1900 7.3700 10,194,100
Weekend
Weekend
7.4900 7.6900 7.2750 7.3000 9,137,100
7.4900 7.5500 7.2300 7.4350 11,177,900
7.5800 7.8550 7.4300 7.6200 9,294,400
7.7400 7.9500 7.5600 7.6000 11,794,200
7.4000 7.7700 7.2210 7.6300 12,019,200
Weekend
Weekend
7.5000 8.0500 7.4100 7.6000 12,238,100
7.9800 8.0700 7.5800 7.7200 13,945,700
9 · 8-K Pre-market · 09:00 ET CURRENT REPORT ↗
7.9900 8.2500 7.8500 8.1500 13,361,800
8.1150 8.2850 7.6950 7.7300 14,785,200
8 · 10-K After-hours · 17:06 ET ANNUAL REPORT ↗ 7 · 8-K After-hours · 16:15 ET CURRENT REPORT ↗
8.0900 8.6100 8.0400 8.5900 12,165,200
Weekend
Weekend
8.7100 8.8000 8.1100 8.4100 12,096,500
9.1000 9.1480 8.6050 9.0400 17,557,800
8.2200 8.9350 8.0900 8.6800 14,679,200
7.8100 8.2350 7.7600 8.1100 8,739,700
7.7600 7.9800 7.6300 7.8800 8,357,900
Weekend
Weekend
8.1600 8.3000 7.8450 7.9000 9,106,800
8.0500 8.3100 7.9510 8.2200 7,318,300
8.0600 8.4500 7.8000 8.2100 8,777,700
8.3100 8.3650 7.9100 8.0500 10,516,800
No trading
Weekend
Weekend
8.3600 8.5850 7.9600 8.4700 11,249,200
8.5200 8.5200 7.9200 8.1900 12,288,000
9.2300 9.2300 8.2300 8.5400 13,578,600
9.3540 9.6800 8.8900 8.9600 10,698,800
9.3200 9.5800 8.9700 9.4400 12,785,700
Weekend
Weekend
8.2900 9.6650 8.2450 9.4300 20,860,000
8.7400 8.8900 7.7000 7.8100 19,144,100
9.5350 9.5350 8.6200 9.1300 14,704,500
6 · 8-K After-hours · 16:11 ET CURRENT REPORT ↗
9.5700 9.7250 9.1300 9.6500 15,298,500
9.2700 9.3700 8.9950 9.3400 11,543,200
Weekend
Weekend
10.0600 10.2400 9.0000 9.2700 20,020,700
11.0100 11.0380 10.1100 10.1800 17,309,900
11.3100 11.5300 10.9700 11.1300 11,770,300
10.9800 11.4300 10.8200 11.3100 10,870,400
11.4500 11.4600 10.7400 10.8400 14,361,600
Weekend
Weekend
12.1000 12.1200 11.1500 11.4600 17,534,200
11.7800 12.4900 11.7000 12.0000 18,341,700
12.1800 12.6200 10.8250 11.6400 28,319,400
12.1400 12.9500 11.8800 11.9300 21,124,900
No trading
Weekend
Weekend
12.3150 13.1950 12.0700 12.7000 21,206,400
12.9750 13.3070 12.1600 12.1800 23,407,200
11.6700 12.5400 11.4800 12.5100 18,108,400
12.2400 12.4000 11.4600 11.6900 14,818,200
11.6800 12.1300 11.3700 12.1100 14,867,900
5 · 8-K Pre-market · 08:48 ET CURRENT REPORT ↗
Weekend
Weekend
12.0400 12.6850 11.6500 11.7200 17,449,600
11.6000 12.3400 11.4800 11.9400 14,874,300
12.0100 12.1750 11.5700 11.6500 13,737,800
11.9600 12.2600 11.4600 12.1400 20,714,600
11.2700 12.4300 11.1100 11.9600 22,731,900
Weekend
Weekend
10.5500 11.0650 10.2300 11.0100 16,622,700
No trading
10.3250 10.5860 10.1500 10.2600 14,009,500
10.5800 10.8800 10.3600 10.4000 11,335,800
10.4800 10.8550 10.3100 10.5700 13,448,800
Weekend
Weekend
11.3500 11.3700 10.6200 10.6600 13,626,300
No trading
11.7300 11.7500 11.1800 11.4200 7,837,900
11.9700 12.5000 11.5800 11.7300 16,241,000
10.9400 12.5500 10.8800 12.2900 28,652,600
Weekend
Weekend
10.3400 11.0260 10.2650 10.8900 26,851,100
10.5950 10.8600 10.1300 10.3400 14,396,300
11.1800 11.4200 10.1410 10.2200 19,257,900
4 · 8-K Next filing day · accepted 16 Dec, 20:59 ET CURRENT REPORT ↗
10.8000 11.3150 10.7600 11.2700 14,927,600
3 · 8-K After-hours · 17:06 ET CURRENT REPORT ↗
12.0300 12.0650 10.8600 10.9100 18,682,000
Weekend
Weekend
12.6450 13.0200 11.9900 12.0500 18,187,100
12.2400 12.9250 11.9700 12.8300 13,536,400
13.0000 13.0300 12.2350 12.5600 21,770,200
12.8700 13.4000 12.5600 13.2100 15,125,900
13.0950 13.2600 12.5300 13.0100 17,190,700
Weekend
Weekend
13.2900 13.4300 12.7300 12.8400 20,717,600
11.8850 13.6400 11.7600 13.5800 29,093,500
11.0000 12.1800 10.6800 12.0700 20,218,900
11.0400 11.4500 10.9300 11.0000 13,447,900
11.3200 11.3600 10.9200 10.9500 14,039,100
Weekend
Weekend
11.5600 11.9800 11.4150 11.7000 9,250,900
No trading
11.6900 11.8000 11.1700 11.4600 15,082,700
11.2750 11.8100 10.7900 11.6000 19,876,700
10.2650 11.5900 10.1800 11.4900 22,870,600
Weekend
Weekend
10.3800 10.5200 9.5000 10.2000 25,076,500
12.0900 12.2300 10.1900 10.2700 34,810,300
12.5000 12.6800 11.3500 11.5600 32,207,800
11.2900 13.0700 11.2400 12.3400 64,754,900
11.7100 12.2500 10.9100 11.5000 71,376,300
Weekend
Weekend
2 · 8-K After-hours · 16:13 ET CURRENT REPORT ↗ 1 · 10-Q After-hours · 16:02 ET QUARTERLY REPORT ↗
9.6100 11.1750 9.5400 10.6000 38,176,900
10.7650 10.8500 9.8600 10.0300 28,157,400
12.0000 12.0550 11.0200 11.1400 24,994,300
12.4150 12.6000 11.7400 11.9400 28,988,000
13.4450 13.5580 12.6200 12.7000 21,553,100
Weekend
Weekend
12.7400 12.8600 11.6000 12.8600 27,666,100
14.1450 14.1600 12.9100 13.1500 21,239,500
14.1150 14.3450 13.3300 14.1900 19,868,600
14.7750 15.0900 13.7100 13.7100 25,081,600
16.6400 16.6800 15.3100 15.3800 32,164,400
Weekend
Weekend
15.3100 16.7900 15.1700 16.7100 44,842,100
15.1400 15.4900 14.7000 14.9700 23,022,600
15.0100 15.6800 14.7200 15.5200 37,045,800
15.7750 16.1950 14.9000 14.9100 42,666,700
16.0800 16.7100 15.6800 15.7200 45,408,000
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.

23 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:26 ET Summarise
22 8-K/A AMENDMENT NO. 1 TO FORM 8-K (opens SEC filing in a new tab) After-hours · 16:01 ET Summarise
21 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:08 ET Summarise
20 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:23 ET Summarise
19 8-K CURRENT REPORT (opens SEC filing in a new tab) After market open · 13:00 ET Summarise
18 8-K CURRENT REPORT (opens SEC filing in a new tab) Next filing day · accepted 29 Jun, 18:46 ET Summarise
17 8-K CURRENT REPORT (opens SEC filing in a new tab) Pre-market · 08:55 ET Summarise
16 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:47 ET Summarise
15 10-Q QUARTERLY REPORT (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise
14 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
13 DEFA14A DEFINITIVE ADDITIONAL MATERIALS (opens SEC filing in a new tab) After-hours · 16:32 ET Summarise
12 DEF 14A PROXY STATEMENT (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
11 PRE 14A PROXY STATEMENT (opens SEC filing in a new tab) After-hours · 17:16 ET Summarise
10 8-K/A AMENDMENT NO. 1 TO FORM 8-K (opens SEC filing in a new tab) After-hours · 16:55 ET Summarise
9 8-K CURRENT REPORT (opens SEC filing in a new tab) Pre-market · 09:00 ET Summarise
8 10-K ANNUAL REPORT (opens SEC filing in a new tab) After-hours · 17:06 ET Summarise
7 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
6 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:11 ET Summarise
5 8-K CURRENT REPORT (opens SEC filing in a new tab) Pre-market · 08:48 ET Summarise
4 8-K CURRENT REPORT (opens SEC filing in a new tab) Next filing day · accepted 16 Dec, 20:59 ET Summarise
3 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 17:06 ET Summarise
2 8-K CURRENT REPORT (opens SEC filing in a new tab) After-hours · 16:13 ET Summarise
1 10-Q QUARTERLY REPORT (opens SEC filing in a new tab) After-hours · 16:02 ET Summarise