Quantum Corporation QMCO

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Quantum Corporation - Common Stock · Company · Nasdaq · Technology / Computer Hardware

Paper trade (simulated — no real money)

Fill: USD 17.6200 · FX 1 USD = 1.277900 SGD · about SGD 22.5166 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 10.14 → 17.62 · 73.8%
34.50019.4054.310 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 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
17.6400 18.9900 17.3600 17.6200 1,932,270
17.0700 17.8000 16.7400 16.9800 1,787,100
19.2000 19.2300 17.2500 17.6200 2,144,200
17.6000 20.0300 17.4100 18.9900 1,629,300
19.1100 19.5300 18.2200 18.3100 1,683,400
Weekend
Weekend
21.0300 21.0600 18.4200 18.4800 1,978,300
22.5000 22.5200 20.3800 21.6100 3,321,300
25.5200 26.2400 23.7700 23.8600 1,138,700
26.0200 28.0700 25.7800 26.5200 2,075,400
29.4100 29.9800 26.5800 27.5100 2,367,600
Weekend
Weekend
30 · 8-K After-hours · 20:46 ET 8-K ↗
29.8900 30.8000 28.3000 30.4300 1,201,600
30.1500 32.5500 28.5500 29.1800 1,918,200
32.5000 33.3900 30.4000 31.0700 1,445,000
34.0200 35.4100 33.2900 33.4700 1,417,000
34.3900 35.6500 33.6400 34.0100 1,649,100
Weekend
Weekend
30.1000 35.1700 29.8500 34.5000 3,653,400
33.1900 34.3700 31.5100 31.8900 1,917,500
32.8300 33.1800 31.4000 31.7200 1,293,600
32.3200 34.6800 31.1700 32.8600 1,966,200
29 · 8-K After market open · 12:52 ET 8-K ↗
31.6500 32.9000 31.0700 31.4000 1,616,600
Weekend
Weekend
30.0100 33.0100 29.0200 31.6800 4,239,000
25.3900 32.0800 25.1000 29.4900 5,210,300
25.4400 29.1500 24.5000 25.9700 3,683,000
26.0500 26.4900 24.6500 25.6500 1,102,800
26.0200 26.5000 25.0600 26.1000 1,096,400
Weekend
Weekend
24.8300 25.3100 24.3000 25.0900 1,873,600
28 · 8-K After-hours · 16:47 ET 8-K ↗
24.6800 26.3900 24.5900 24.9400 1,450,300
23.5600 24.3700 22.9000 23.8300 758,500
22.9000 24.0700 22.6100 23.2600 874,600
22.6000 24.1300 21.8000 22.8300 961,300
Weekend
Weekend
23.0300 23.7200 22.3000 23.5800 785,600
23.5400 24.5400 22.9000 23.0300 984,700
24.4000 25.4900 24.0800 24.2400 860,900
24.7300 25.7500 24.3300 24.4600 1,441,900
No trading
Weekend
Weekend
24.4700 25.4800 23.9300 24.7300 1,046,000
22.8100 24.3700 21.7200 24.3000 795,100
24.0500 24.4200 22.2700 22.7800 914,600
27 · 8-K After-hours · 16:50 ET 8-K ↗
23.8500 24.6800 23.0600 24.1700 860,600
21.9700 24.4100 21.4100 24.3300 1,203,700
Weekend
Weekend
23.4200 23.7200 21.9100 22.2600 728,600
23.5000 23.8500 22.8400 23.5600 878,300
22.3100 23.2600 21.7200 23.2100 856,500
21.9000 22.4100 21.0100 22.3900 961,000
21.3100 21.9100 20.4800 21.5600 924,100
Weekend
Weekend
20.8000 22.4000 19.7300 22.2500 1,459,900
21.5200 21.7900 19.7300 20.4900 1,461,500
23.2700 23.2700 21.2900 21.7900 1,862,800
23.8400 26.2800 23.4600 23.5200 1,596,800
24.8300 25.9500 23.7500 24.9200 2,094,600
Weekend
Weekend
26 · 8-K After-hours · 17:24 ET 8-K ↗
24.6800 27.8000 24.1000 26.1100 4,278,000
21.7500 24.9300 21.5200 24.6800 4,386,800
20.1000 22.2200 20.0100 21.9400 5,060,000
14.5200 19.6000 13.9900 19.4000 16,536,800
25 · 10-Q Next filing day · accepted 10 Aug, 18:13 ET 10-Q ↗ 24 · 8-K After-hours · 16:27 ET 8-K ↗
12.2000 12.4500 11.4400 11.7800 1,443,500
Weekend
Weekend
11.8800 12.1800 11.6500 12.0400 656,900
11.3900 12.1900 11.0600 11.6800 548,100
11.3300 11.9800 11.1300 11.5800 486,400
10.8800 11.6300 10.7600 11.4500 1,192,500
10.6000 11.0200 10.1900 10.5600 728,100
Weekend
Weekend
11.4100 12.2300 10.5700 10.6400 1,407,200
11.4100 11.4300 10.3400 11.2400 1,472,300
23 · DEFA14A After-hours · 16:06 ET DEFA14A ↗ 22 · DEF 14A After-hours · 16:06 ET DEF 14A ↗
11.3000 12.8100 10.4000 10.4500 1,583,300
10.9100 11.4300 9.8600 11.2800 1,136,900
21 · 424B3 After-hours · 16:31 ET 424B3 ↗
11.3600 11.5200 10.5900 10.9700 1,063,700
Weekend
Weekend
11.4300 11.5400 10.9400 11.1000 347,600
11.3700 12.3500 11.3400 11.5500 611,000
11.2900 12.2400 11.2700 11.6600 654,200
11.3500 11.6700 11.3200 11.4600 688,900
10.6700 11.4800 10.5400 10.9900 689,400
Weekend
Weekend
9.1600 10.8000 9.0600 10.6300 1,023,500
10.0700 10.3900 9.4800 9.6000 943,500
10.2700 11.6000 10.1100 10.3000 1,483,700
9.6600 10.3100 9.6600 10.0600 555,200
20 · S-1 Next filing day · accepted 13 Jul, 18:33 ET S-1 ↗
9.8800 10.1600 9.5600 9.6700 437,100
Weekend
Weekend
10.3500 10.4500 9.6300 10.0200 720,600
10.7800 10.9700 10.3100 10.4000 772,600
9.8900 10.6900 9.8300 10.6000 1,420,000
10.4600 10.5900 9.7900 10.1300 605,200
10.2200 10.6100 9.9100 10.5300 624,500
Weekend
Weekend
No trading
11.0700 11.2100 9.8200 10.1600 685,100
10.8000 11.3500 10.5500 10.9300 781,300
11.8300 11.8300 10.6900 11.0000 1,031,600
11.7100 12.7300 11.3300 11.8500 1,128,300
Weekend
Weekend
11.2400 11.7000 9.8000 11.6500 2,305,700
19 · 10-K After-hours · 17:16 ET 10-K ↗ 18 · 8-K After-hours · 16:21 ET 8-K ↗
14.0000 14.4100 12.5300 12.9300 1,322,300
13.7700 14.0800 12.9600 13.4200 629,600
13.3700 14.1500 13.2000 13.8100 733,100
15.7500 16.5000 13.9900 14.0400 1,192,100
Weekend
Weekend
No trading
15.4900 16.3800 15.0900 15.6000 1,312,200
14.7600 15.7800 13.7600 14.9500 1,095,100
13.7400 16.1500 13.5600 14.4100 1,647,700
15.2800 16.0000 13.7000 13.9700 2,448,200
Weekend
Weekend
13.1000 14.8400 12.7000 13.7400 1,278,400
12.6100 13.0900 11.7500 13.0600 1,062,100
12.8200 14.1200 12.5500 12.5900 884,000
12.6700 14.9800 11.9900 13.0500 2,079,400
13.1200 13.2600 11.9000 12.5400 1,467,000
Weekend
Weekend
17 · 8-K After-hours · 16:05 ET 8-K ↗
15.2300 15.7400 12.1500 12.7000 2,645,600
14.6500 18.4800 14.6100 15.7800 3,860,200
12.1900 16.6300 12.1900 15.9500 4,852,500
16 · 8-K After market open · 10:41 ET 8-K ↗
10.4300 13.0100 10.2200 12.5400 3,310,200
9.5500 10.7000 9.3600 10.4900 1,165,700
Weekend
Weekend
9.3100 9.9200 9.0500 9.7100 520,200
8.6500 9.5400 8.6100 9.3200 607,800
8.6800 8.9600 8.3300 8.8200 399,700
9.0800 9.1100 8.4500 8.7300 565,700
No trading
Weekend
Weekend
9.4000 10.1800 9.0000 9.0500 1,860,000
8.3300 9.6500 8.2800 9.4100 1,303,500
7.7800 8.3600 7.7800 8.1600 319,000
7.8000 7.9600 7.4600 7.7100 385,900
8.2900 8.4400 7.6500 7.9800 471,700
Weekend
Weekend
8.3900 8.5700 8.1000 8.3500 402,000
8.7000 9.0000 8.2000 8.8000 469,500
8.9400 9.0800 8.5700 8.8100 380,200
9.5800 9.8300 8.4900 8.9400 678,300
9.6200 10.2600 9.1700 9.7800 934,200
Weekend
Weekend
9.2900 9.8600 8.8500 9.6200 504,800
9.7000 9.7200 8.7600 9.1300 881,800
9.0100 10.6400 9.0000 10.0300 2,269,700
7.6000 8.3000 7.4100 8.2700 765,300
7.4600 7.6700 7.1600 7.5600 342,200
Weekend
Weekend
7.1500 7.5900 7.1500 7.5200 359,100
6.8400 7.2500 6.7500 7.1400 275,800
6.7400 6.8800 6.4700 6.8100 272,700
6.8000 6.8700 6.5800 6.7200 212,200
7.0800 7.1700 6.7000 6.9200 342,500
Weekend
Weekend
7.2600 7.6600 7.1500 7.1700 599,400
7.1600 7.1800 6.8800 7.0400 269,300
7.1400 7.4500 7.1000 7.1800 219,900
7.1300 7.3500 6.9300 6.9700 256,700
7.0700 7.2500 7.0200 7.2000 232,300
Weekend
Weekend
7.1800 7.5100 7.0000 7.2800 523,500
7.3100 7.3100 6.6600 7.0700 581,100
7.1400 7.4600 6.9100 7.2500 977,000
6.4300 7.1200 6.3500 6.9100 1,193,800
5.9300 6.4700 5.8500 6.4200 350,800
Weekend
Weekend
5.9500 6.2500 5.8800 6.0400 194,300
5.9500 6.1000 5.7300 5.8900 363,400
6.4700 6.5200 5.9200 6.0800 392,300
5.8900 6.2200 5.8000 6.1000 383,500
5.6800 6.3700 5.6400 6.1500 534,200
Weekend
Weekend
No trading
4.8100 5.7300 4.8100 5.6800 585,400
4.8500 5.2400 4.8100 5.0300 335,500
4.3400 4.8300 4.2500 4.7500 669,300
4.7500 4.8100 4.1900 4.3100 632,100
Weekend
Weekend
5.0900 5.0900 4.6300 4.6800 492,500
5.4200 5.7600 5.1700 5.2200 346,100
5.3500 5.9400 5.1600 5.6600 751,000
5.1900 5.4000 5.0600 5.1100 143,700
5.1200 5.3300 5.0700 5.2600 178,100
Weekend
Weekend
5.1600 5.1600 4.8700 4.9700 195,800
5.1800 5.2500 4.9600 5.1900 271,300
5.4500 5.6300 5.2900 5.3000 244,800
5.5200 5.6600 5.3800 5.5200 166,000
5.4000 5.5600 5.3000 5.5400 158,100
Weekend
Weekend
5.4600 5.5800 5.1300 5.3000 205,900
5.6100 5.7300 5.3300 5.4400 294,300
5.5200 5.7700 5.4900 5.7400 256,600
5.3600 5.6100 5.3500 5.5200 269,200
4.9900 5.4400 4.9500 5.3800 356,800
Weekend
Weekend
4.8800 5.4100 4.8800 5.1300 480,500
4.7300 5.2200 4.7000 5.1000 564,100
4.7800 4.9400 4.5600 4.8100 785,700
5.1700 5.1900 4.5000 4.6400 1,130,200
5.1300 5.5100 5.1300 5.3000 398,500
Weekend
Weekend
5.4500 5.5200 5.2700 5.4800 283,700
5.5100 5.6900 5.4300 5.6700 361,700
5.3900 5.5500 5.3200 5.4500 324,900
15 · 424B3 After-hours · 16:15 ET 424B3 ↗
5.1800 5.4700 5.1000 5.3900 333,600
5.2600 5.3900 5.0700 5.2500 358,300
Weekend
Weekend
5.4300 5.7000 5.2500 5.3600 391,500
5.2000 5.6000 5.1500 5.5600 775,800
14 · S-1 Next filing day · accepted 18 Feb, 19:19 ET S-1 ↗
6.4200 6.4500 5.4300 5.4700 1,576,600
13 · 10-Q After-hours · 16:07 ET 10-Q ↗ 12 · 8-K After-hours · 16:05 ET 8-K ↗
5.7900 5.8000 5.3300 5.6100 1,639,100
No trading
Weekend
Weekend
5.8900 5.9500 5.6900 5.7800 188,800
6.3700 6.3700 5.6000 5.7900 755,500
6.2600 6.4200 5.9600 6.3200 415,600
5.9400 6.2800 5.9000 6.1600 387,900
5.8600 6.0900 5.6100 5.9400 493,500
Weekend
Weekend
5.1900 5.9000 5.1500 5.8900 786,300
5.7000 5.8000 4.8900 4.9600 786,700
6.2500 6.2500 5.6400 5.8100 702,600
6.3900 6.3900 6.0300 6.2400 377,200
6.1200 6.4700 6.0300 6.2600 425,200
11 · 8-K Pre-market · 08:04 ET 8-K ↗
Weekend
Weekend
6.4500 6.5100 6.1100 6.2000 591,900
6.7900 6.7900 6.4300 6.5400 601,000
6.9300 7.1000 6.7000 6.7900 488,100
6.8500 7.0100 6.6800 6.9800 401,000
7.0200 7.0200 6.7000 6.8500 493,700
Weekend
Weekend
7.2700 7.2700 7.0000 7.0200 321,400
7.3300 7.5000 7.1300 7.2500 512,700
7.4500 7.6100 6.7700 7.1900 945,500
7.5100 7.8100 7.2300 7.3600 761,200
No trading
Weekend
Weekend
8.0000 8.1100 7.7200 7.8900 578,400
8.0600 8.2400 7.5500 7.9100 1,392,700
10 · 8-K Pre-market · 08:42 ET 8-K ↗
7.3400 7.5000 7.1700 7.4900 252,200
7.5400 7.5800 7.2100 7.3000 334,100
7.4700 7.7700 7.3100 7.5100 413,500
Weekend
Weekend
7.8600 7.9000 7.4500 7.5400 364,600
7.3900 7.9800 7.3500 7.7300 539,200
7.8500 7.8700 7.3800 7.4500 526,500
7.8700 8.0800 7.4600 7.9900 495,700
7.1300 8.1000 7.1200 7.6700 968,600
Weekend
Weekend
6.7200 7.0300 6.6700 7.0000 503,100
No trading
6.7300 6.8100 6.2200 6.4500 1,191,800
6.7200 6.9500 6.7000 6.7500 451,000
6.8200 7.0300 6.7200 6.7800 530,500
Weekend
Weekend
7.3400 7.3400 6.9200 6.9600 468,200
No trading
7.2400 7.3900 7.0100 7.3700 177,300
7.4100 7.5800 7.0900 7.2400 474,500
7.3800 7.8800 7.3000 7.4300 654,200
Weekend
Weekend
7.2900 7.4700 7.2400 7.3200 724,700
9 · 8-K After-hours · 17:15 ET 8-K ↗
7.5100 7.9400 7.0700 7.2500 538,800
7.9500 8.1500 7.4000 7.4200 317,900
7.7300 8.0800 7.6900 7.9600 354,400
9.0500 9.1100 7.7200 7.7300 576,700
Weekend
Weekend
9.7500 9.8000 8.8900 9.0300 555,900
9.3900 10.0100 9.2500 9.7500 680,200
9.0300 9.7500 8.7600 9.4900 763,400
8.9800 9.0900 8.4100 9.0400 384,300
8.8100 9.1300 8.6900 9.1000 362,200
Weekend
Weekend
8.7300 8.9800 8.5000 8.7200 492,100
8.1600 8.7600 8.0600 8.7400 637,900
7.7100 8.2600 7.6300 8.2600 329,600
8 · DEFA14A After-hours · 16:24 ET DEFA14A ↗
7.5600 7.8200 7.5200 7.7200 236,400
7.5200 7.7500 7.4300 7.5400 258,700
Weekend
Weekend
7.5800 7.9100 7.4900 7.8500 303,000
No trading
6.9000 7.6300 6.9000 7.4800 475,100
6.9700 7.0100 6.5600 6.9500 568,900
7 · 424B3 After-hours · 16:05 ET 424B3 ↗
7.0000 7.1100 6.8700 6.9700 666,700
Weekend
Weekend
7.0900 7.1600 6.5500 6.9800 980,600
7.9200 8.3000 7.2600 7.3100 828,300
7.6400 7.8300 7.4200 7.6400 505,900
7.2900 7.8100 7.2600 7.7100 623,300
7.3400 8.0300 7.2700 7.3900 895,100
6 · S-1 Next filing day · accepted 14 Nov, 18:33 ET S-1 ↗
Weekend
Weekend
7.4500 8.4800 7.4300 7.8700 2,204,300
5 · 10-Q After-hours · 17:07 ET 10-Q ↗ 4 · 8-K After-hours · 16:51 ET 8-K ↗
7.3600 7.5000 6.9000 7.0300 808,200
7.7900 7.9300 7.5100 7.7000 437,900
8.0000 8.0800 7.7500 7.8800 320,700
8.4500 8.4500 7.9200 8.1900 502,200
Weekend
Weekend
7.6800 8.2000 7.3600 8.1800 838,600
8.3900 8.3900 7.7500 8.0500 711,400
8.5000 8.6800 8.1800 8.2000 677,700
8.9200 9.1800 8.4500 8.4900 744,600
9.4000 9.4900 8.9800 9.3900 676,100
Weekend
Weekend
3 · DEFA14A After-hours · 16:36 ET DEFA14A ↗ 2 · DEF 14A After-hours · 16:34 ET DEF 14A ↗
9.4900 9.5300 9.1700 9.4400 866,300
9.3800 9.5700 9.2700 9.4000 605,600
10.0600 10.1600 9.4100 9.6300 1,266,000
10.0000 10.3300 9.8300 10.0500 1,074,700
1 · 8-K Pre-market · 07:33 ET 8-K ↗
10.9800 11.0300 10.0100 10.1400 1,499,200
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.

30 8-K 8-K (opens SEC filing in a new tab) After-hours · 20:46 ET Summarise
29 8-K 8-K (opens SEC filing in a new tab) After market open · 12:52 ET Summarise
28 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:47 ET Summarise
27 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:50 ET Summarise
26 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:24 ET Summarise
25 10-Q 10-Q (opens SEC filing in a new tab) Next filing day · accepted 10 Aug, 18:13 ET Summarise
24 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:27 ET Summarise
23 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise
22 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:06 ET Summarise
21 424B3 424B3 (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise
20 S-1 S-1 (opens SEC filing in a new tab) Next filing day · accepted 13 Jul, 18:33 ET Summarise
19 10-K 10-K (opens SEC filing in a new tab) After-hours · 17:16 ET Summarise
18 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:21 ET Summarise
17 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
16 8-K 8-K (opens SEC filing in a new tab) After market open · 10:41 ET Summarise
15 424B3 424B3 (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
14 S-1 S-1 (opens SEC filing in a new tab) Next filing day · accepted 18 Feb, 19:19 ET Summarise
13 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:07 ET Summarise
12 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
11 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:04 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:42 ET Summarise
9 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:15 ET Summarise
8 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:24 ET Summarise
7 424B3 424B3 (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
6 S-1 S-1 (opens SEC filing in a new tab) Next filing day · accepted 14 Nov, 18:33 ET Summarise
5 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 17:07 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:51 ET Summarise
3 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:36 ET Summarise
2 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:34 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:33 ET Summarise