Quantum Corporation QMCO

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Quantum Corporation - Common Stock · Company · Nasdaq

Paper trade (simulated — no real money)

Fill: USD 11.1000 · FX 1 USD = 1.288650 SGD · about SGD 14.3040 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 8.28 → 11.10 · 34.1%
15.95010.1304.310 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 31 32 33,34 35 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
11.4300 11.5400 10.9400 11.1000 347,100
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
35 · 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
34 · 10-K After-hours · 17:16 ET 10-K ↗ 33 · 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
32 · 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
31 · 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
30 · 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
29 · S-1 Next filing day · accepted 18 Feb, 19:19 ET S-1 ↗
6.4200 6.4500 5.4300 5.4700 1,576,600
28 · 10-Q After-hours · 16:07 ET 10-Q ↗ 27 · 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
26 · 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
25 · 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
24 · 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
23 · 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
22 · 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
21 · 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
20 · 10-Q After-hours · 17:07 ET 10-Q ↗ 19 · 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
18 · DEFA14A After-hours · 16:36 ET DEFA14A ↗ 17 · 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
16 · 8-K Pre-market · 07:33 ET 8-K ↗
10.9800 11.0300 10.0100 10.1400 1,499,200
Weekend
Weekend
10.5400 11.2800 10.4200 10.4600 1,247,700
10.3900 10.5100 9.9500 10.2500 1,535,500
9.6500 9.6800 8.9000 9.3200 1,284,300
15 · PRE 14A After-hours · 17:06 ET PRE 14A ↗
10.3000 10.3400 9.7700 9.9100 860,900
14 · 8-K After-hours · 17:01 ET 8-K ↗
10.6800 10.8800 10.3300 10.3500 866,300
Weekend
Weekend
10.9900 11.1000 10.2500 10.2900 1,190,800
12.5000 12.6200 11.0500 11.1800 1,457,300
13.1200 13.4200 11.9400 12.4400 2,150,500
11.6700 13.1300 11.1800 12.6900 2,884,300
11.5600 12.2000 11.5000 11.8000 2,020,200
Weekend
Weekend
12.6600 13.0000 10.9200 10.9600 2,761,500
12.8500 13.3900 12.1200 12.5400 1,786,400
13.2400 13.6400 12.3700 12.9400 3,058,400
12.5000 15.3300 12.1000 13.3500 9,097,300
13 · 8-K After-hours · 16:03 ET 8-K ↗
11.5000 12.0600 10.9000 11.9100 2,423,400
Weekend
Weekend
11.5900 12.7200 11.5500 11.7600 5,414,900
10.9600 11.2400 10.3700 10.9200 2,191,800
12 · 424B3 After-hours · 16:05 ET 424B3 ↗
9.8100 10.9800 9.7800 10.8900 2,041,700
9.6500 10.4200 9.5000 9.9200 1,389,300
9.6400 9.8200 9.0500 9.8000 1,078,300
Weekend
Weekend
9.6400 10.1900 9.2600 9.4800 1,926,800
9.3100 9.9800 9.2200 9.6200 2,037,900
11.0600 11.1600 10.0600 10.1600 2,563,700
11.7400 12.4800 10.3600 10.6900 4,938,300
11 · DEFA14A Pre-market · 08:48 ET DEFA14A ↗ 10 · 8-K Pre-market · 08:45 ET 8-K ↗ 9 · 10-Q/A Pre-market · 08:54 ET 10-Q/A ↗
12.6100 12.8300 10.8800 11.4600 9,818,500
Weekend
Weekend
8.7000 12.6900 8.5300 11.8800 22,217,500
8.7900 9.1600 8.4000 8.4500 2,152,900
8.1900 8.7400 8.1400 8.3500 1,422,100
8.0700 8.5300 7.8500 8.2700 1,137,900
8 · 8-K After-hours · 16:11 ET 8-K ↗
7.7800 8.0600 7.5200 7.8800 1,156,900
Weekend
Weekend
7.2100 7.8700 7.1600 7.3600 1,557,700
7 · 10-Q After-hours · 16:23 ET 10-Q ↗
7.3900 7.5700 7.0700 7.1200 2,176,200
6 · 8-K After-hours · 16:12 ET 8-K ↗
8.2500 8.6200 7.8500 8.5700 2,113,000
7.6000 8.0400 7.5700 7.9900 531,200
7.4500 7.6400 7.3500 7.5900 342,800
Weekend
Weekend
7.2700 7.4300 7.0600 7.4200 277,100
7.1800 7.2200 7.0300 7.1800 203,000
7.3000 7.4000 7.1400 7.2100 212,600
7.1900 7.3400 7.0100 7.3000 243,200
No trading
Weekend
Weekend
7.5600 7.5800 7.3700 7.4300 305,700
5 · 8-K After-hours · 16:12 ET 8-K ↗
7.4600 7.7900 7.3800 7.6300 384,900
7.2100 7.7300 7.1500 7.3300 652,800
4 · 8-K After-hours · 17:26 ET 8-K ↗ 3 · 10-K After-hours · 16:54 ET 10-K ↗
7.9500 8.1400 7.8000 7.9400 678,500
7.6000 7.8300 7.4000 7.7800 350,900
Weekend
Weekend
7.0200 7.7700 6.9800 7.7500 564,500
6.7000 7.0300 6.6800 7.0300 329,700
6.8000 6.8900 6.5100 6.7700 419,100
7.3400 7.3400 6.7600 6.8300 802,300
2 · 8-K After-hours · 16:02 ET 8-K ↗
7.4600 7.5200 7.2700 7.4400 236,400
Weekend
Weekend
7.8300 7.8300 7.4700 7.5500 466,700
7.8100 7.9000 7.5800 7.8700 329,600
7.3500 8.0000 7.2700 8.0000 675,600
7.6800 7.7000 6.9000 7.4300 892,300
7.9100 7.9900 7.6100 7.6600 459,400
Weekend
Weekend
1 · 8-K After-hours · 16:31 ET 8-K ↗
7.9200 8.0700 7.7700 7.8000 465,900
8.0400 8.0800 7.8100 7.9200 261,600
8.0400 8.1400 7.8400 7.9100 379,200
8.2100 8.3900 7.9800 8.3100 661,300
7.7200 8.0800 7.6200 8.0800 520,100
Weekend
Weekend
7.7400 7.8100 7.4500 7.5300 605,000
7.9500 8.2400 7.8700 8.0100 445,600
7.9500 8.1400 7.8300 7.8700 376,800
8.3000 8.3800 7.8600 7.8800 674,300
8.9000 9.0500 8.1200 8.2800 1,011,500
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.

35 S-1 S-1 (opens SEC filing in a new tab) Next filing day · accepted 13 Jul, 18:33 ET Summarise
34 10-K 10-K (opens SEC filing in a new tab) After-hours · 17:16 ET Summarise
33 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:21 ET Summarise
32 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
31 8-K 8-K (opens SEC filing in a new tab) After market open · 10:41 ET Summarise
30 424B3 424B3 (opens SEC filing in a new tab) After-hours · 16:15 ET Summarise
29 S-1 S-1 (opens SEC filing in a new tab) Next filing day · accepted 18 Feb, 19:19 ET Summarise
28 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:07 ET Summarise
27 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
26 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:04 ET Summarise
25 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:42 ET Summarise
24 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:15 ET Summarise
23 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:24 ET Summarise
22 424B3 424B3 (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
21 S-1 S-1 (opens SEC filing in a new tab) Next filing day · accepted 14 Nov, 18:33 ET Summarise
20 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 17:07 ET Summarise
19 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:51 ET Summarise
18 DEFA14A DEFA14A (opens SEC filing in a new tab) After-hours · 16:36 ET Summarise
17 DEF 14A DEF 14A (opens SEC filing in a new tab) After-hours · 16:34 ET Summarise
16 8-K 8-K (opens SEC filing in a new tab) Pre-market · 07:33 ET Summarise
15 PRE 14A PRE 14A (opens SEC filing in a new tab) After-hours · 17:06 ET Summarise
14 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:01 ET Summarise
13 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:03 ET Summarise
12 424B3 424B3 (opens SEC filing in a new tab) After-hours · 16:05 ET Summarise
11 DEFA14A DEFA14A (opens SEC filing in a new tab) Pre-market · 08:48 ET Summarise
10 8-K 8-K (opens SEC filing in a new tab) Pre-market · 08:45 ET Summarise
9 10-Q/A 10-Q/A (opens SEC filing in a new tab) Pre-market · 08:54 ET Summarise
8 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:11 ET Summarise
7 10-Q 10-Q (opens SEC filing in a new tab) After-hours · 16:23 ET Summarise
6 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:12 ET Summarise
5 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:12 ET Summarise
4 8-K 8-K (opens SEC filing in a new tab) After-hours · 17:26 ET Summarise
3 10-K 10-K (opens SEC filing in a new tab) After-hours · 16:54 ET Summarise
2 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:02 ET Summarise
1 8-K 8-K (opens SEC filing in a new tab) After-hours · 16:31 ET Summarise