8-K - QUANTUM CORP /DE/ (0000709283) (Filer)
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8-K - QUANTUM /DE/ filed an 8-K with the SEC on Nov 9 (a notice of a material company event).
Directly affected
- QMCO Quantum-44.3% 30d
Named in this report.
Indirectly affected
- XLK Technology Select Sector SPDR+2.4% 10d
Technology Select Sector SPDR holds the technology sector that Quantum belongs to, so it often moves with news about it.
- SNDK Sandisk-51.2% 30d
Sandisk is a peer of Quantum in computer storage devices; rivals often move on the same news.
- WDC Western Digital-28.1% 30d
Western Digital is a peer of Quantum in computer storage devices; rivals often move on the same news.
- NTAP NetApp-2.9% 30d
NetApp is a peer of Quantum in computer storage devices; rivals often move on the same news.
- P Everpure-12.3% 30d
Everpure is a peer of Quantum in computer storage devices; rivals often move on the same news.
- STX Seagate Technology Holdings-50.0% 30d
Seagate Technology Holdings is a peer of Quantum in computer storage devices; rivals often move on the same news.
Price reaction, T-5 to T+3
| Ticker | T-5 | T-3 | T-1 | T0 | T+1 | T+2 | T+3 |
|---|---|---|---|---|---|---|---|
| QMCO | +4.23% | -19.96% | base | after close | after close | after close | after close |
| XLK | +3.30% | -4.92% | base | after close | after close | after close | after close |
| SNDK | +27.12% | -8.92% | base | after close | after close | after close | after close |
| WDC | +19.93% | -7.65% | base | after close | after close | after close | after close |
| NTAP | +8.37% | -3.67% | base | after close | after close | after close | after close |
| P | +14.39% | -9.12% | base | after close | after close | after close | after close |
| STX | +19.61% | -8.10% | base | after close | after close | after close | after close |
Closing-price change versus T-1, the last close before the story. T0 to T+3 fill in after each market close. Prices: Alpaca IEX.
Filed: 2026-11-09 AccNo: 0001628280-26-072188 Size: 467 KB Item 2.02: Results of Operations and Financial Condition Item 9.01: Financial Statements and Exhibits
Source: sec-edgar
Quantum (QMCO)
| Company | When | Average | Largest gain | Largest drop | Prices |
|---|---|---|---|---|---|
| Select Sector Spdr Tr (XLK) | the next day | -6.39% | -6.39% | -6.39% | 23 |
Price since this story was published: Quantum (QMCO)
| Company | When | Move | Status |
|---|---|---|---|
| NetApp (NTAP) | three days earlier | -3.67% | final price |
| NetApp (NTAP) | five days earlier | +8.37% | final price |
| Everpure (P) | three days earlier | -9.12% | final price |
| Everpure (P) | five days earlier | +14.39% | final price |
| Quantum (QMCO) | three days earlier | -19.96% | final price |
| Quantum (QMCO) | five days earlier | +4.23% | final price |
| Sandisk (SNDK) | three days earlier | -8.92% | final price |
| Sandisk (SNDK) | five days earlier | +27.12% | final price |
| Seagate Technology Holdings (STX) | three days earlier | -8.10% | final price |
| Seagate Technology Holdings (STX) | five days earlier | +19.61% | final price |
| Western Digital (WDC) | three days earlier | -7.65% | final price |
| Western Digital (WDC) | five days earlier | +19.93% | final price |
| Select Sector Spdr Tr (XLK) | three days earlier | -4.92% | final price |
| Select Sector Spdr Tr (XLK) | five days earlier | +3.30% | final price |
Trades by members of Congress and officials in the stocks in this story
- Rep. Rohit Khanna bought Western Digital (WDC) (held by a spouse), worth $1,001 - $15,000 on 25 Sep 2026. That is 45 days before publication. Filed 7 Oct 2026. View the filing.
- Rep. Gilbert Cisneros sold Western Digital (WDC), worth $1,001 - $15,000 on 18 Sep 2026. That is 52 days before publication. Filed 12 Oct 2026. View the filing.
- Donald J Trump, an executive branch official, bought Everpure (P), worth $15,001 - $50,000 on 28 Aug 2026. That is 73 days before publication. Filed 8 Oct 2026. View the filing.
- Rep. Kevin Hern sold Seagate Technology Holdings (STX), worth $15,001 - $50,000 on 23 Oct 2026. That is 17 days before publication. Filed 28 Oct 2026. View the filing.
- Rep. Lisa McClain sold Seagate Technology Holdings (STX) (held by a spouse), worth $15,001 - $50,000 on 30 Sep 2026. That is 40 days before publication. Filed 12 Oct 2026. View the filing.
- Rep. Kevin Hern sold Seagate Technology Holdings (STX), worth $1,001 - $15,000 on 15 Sep 2026. That is 55 days before publication. Filed 25 Sep 2026. View the filing.
Public disclosure filings, not a recommendation. The filing link is the source document. News use of these reports still sits under 5 U.S.C. § 13107(c).
Who is named in “8-K - QUANTUM CORP /DE/ (0000709283) (Filer)”
Companies carried with this story
- QMCO Quantum
In “8-K - QUANTUM CORP /DE/ (0000709283) (Filer),” Quantum (QMCO) is linked, with no stored direction, high confidence. Reason on file: SEC 8-K filing -> direct issuer disclosure -> QMCO
- SNDK Sandisk
In “8-K - QUANTUM CORP /DE/ (0000709283) (Filer),” Sandisk (SNDK) is linked, with no stored direction, medium confidence. Reason on file: Sandisk is a peer of Quantum in computer storage devices; rivals often move on the same news
- WDC Western Digital
For “8-K - QUANTUM CORP /DE/ (0000709283) (Filer),” Western Digital (WDC) is linked, with no stored direction, medium confidence. Reason on file: Western Digital is a peer of Quantum in computer storage devices; rivals often move on the same news
- XLK Select Sector Spdr Tr
Select Sector Spdr Tr (XLK) is linked, with no stored direction, medium confidence in the 9 Nov 2026 story “8-K - QUANTUM CORP /DE/ (0000709283) (Filer).” Reason on file: Technology Select Sector SPDR holds the technology sector that Quantum belongs to, so it often moves with news about it
- NTAP NetApp
For “8-K - QUANTUM CORP /DE/ (0000709283) (Filer),” NetApp (NTAP) is linked, with no stored direction, medium confidence. Reason on file: NetApp is a peer of Quantum in computer storage devices; rivals often move on the same news
- P Everpure
Everpure (P) is linked, with no stored direction, medium confidence in the 9 Nov 2026 story “8-K - QUANTUM CORP /DE/ (0000709283) (Filer).” Reason on file: Everpure is a peer of Quantum in computer storage devices; rivals often move on the same news
- STX Seagate Technology Holdings
In “8-K - QUANTUM CORP /DE/ (0000709283) (Filer),” Seagate Technology Holdings (STX) is linked, with no stored direction, medium confidence. Reason on file: Seagate Technology Holdings is a peer of Quantum in computer storage devices; rivals often move on the same news
How “8-K - QUANTUM CORP /DE/ (0000709283) (Filer)” reaches Quantum (QMCO)
Quantum (QMCO) is the company in “8-K - QUANTUM CORP /DE/ (0000709283) (Filer),” the 9 Nov 2026 this story story.
Quantum (QMCO) is on the page because SEC 8-K filing -> direct issuer disclosure -> QMCO
Also listed, Sandisk (SNDK): Sandisk is a peer of Quantum in computer storage devices; rivals often move on the same news
Dates and price levels for Quantum (QMCO)
QMCO traded between 12.98 and 29.72 across 20 sessions. The latest close on file is 14.45. SNDK traded between 804.03 and 1538.81 across 20 sessions. The latest close on file is 835.15. WDC traded between 321.98 and 407.20 across 20 sessions. The latest close on file is 323.65.
How solid “8-K - QUANTUM CORP /DE/ (0000709283) (Filer)” looks
46 out of 100
“8-K - QUANTUM CORP /DE/ (0000709283) (Filer)” scores 46 out of 100. The score uses 1 sources, and 7 linked companies.