SEC filingsOct 12, 2026 to Oct 19, 2026: insiders reported 840 purchases and sales across 212 companies.840 insider purchases and sales in 7 daysSee the filings →
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Company profile

QMCO

Quantum Corporation
NASDAQInformation Technology

Latest close: 18.48 USD · Oct 16, 2026 · 1 year · split-adjusted

On the price, the facts of the public record■Insider buy□Insider sell◇Significant stake declared (13D)●Results filed
With an account, also○dividends▲splits◌next earningswith an account

End-of-day prices provided by Twelve Data · One close per session; the series does not update during the trading day.

Latest on record

The most recent facts, as filed.

Up to three of the most recent, checkable facts already loaded on this page, each linked to its source.

  1. Oct 9, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
  2. Sep 28, 2026Material event · 8-KFiled by the company itself.Open the filing ↗
  3. Sep 17, 2026Material event · 8-KFiled by the company itself.Open the filing ↗

In numbers

What this profile holds, counted.

Closes · 1 year250
SEC filings on record1,78324 flagged findings
Reported transactions (Form 4)68since Feb 1, 2023 · and 13 other holdings
Corporate events (8-K)30since Oct 10, 2024

What the record says

Description, identity and filings, each with its source.

Every block cites its source. The colour of a finding marks its category — which document, who filed it — not how much it matters.

SEC topics

Regulatory history

Topics detected in its SEC reports, with the original excerpt.

Each topic is assigned by a classifier over the full filing; the excerpts show where it was detected and are not always enough to verify it. Open the filing to read it in full.

  • 2026-06-05share offering or dilution eventrecentOpen filing ↗
    “…Trust Company, National Association, as the trustee and collateral agent under the Indenture (the “Indenture”), dated as of December…”
  • 2026-06-02share offering or dilution eventrecentOpen filing ↗
    “…than in furtherance of an Exempt Issuance or as contemplated by the PIPE Registration Rights Agreement (as defined below) and the…”
    +1 more passage from the same document
    • “…Agreement), issue, enter into any agreement to issue, or announce the issuance or proposed issuance of, any shares of Common…”
  • 2026-06-02capital return (buybacks/dividends)recentOpen filing ↗
    “…Stock at the time of exercise. The Conversion Warrant includes certain antidilution protections in favor of Dialectic, subject to…”
    +1 more passage from the same document
    • “…that restrict Dialectic from beneficially owning more than 19.99% of the Company’s outstanding Common Stock and certain…”
  • 2026-02-24share offering or dilution eventrecentOpen filing ↗
    “…from time to time by Dialectic Technology SPV LLC, a Delaware limited liability company (the “Selling Stockholder”), of up to…”
    +1 more passage from the same document
    • “…Technology SPV LLC, a Delaware limited liability company (the “Selling Stockholder”), of up to 18,207,453 shares of our common…”
  • 2026-02-24capital return (buybacks/dividends)recentOpen filing ↗
    “…dividend payments, subject to certain limitations as set forth in the Forbearance Warrant. Upon exercise, the aggregate exercise…”
    +1 more passage from the same document
    • “…at the time of exercise. The Selling Stockholder may also require us to repurchase the Forbearance Warrant for $20.0 million after…”
  • 2026-02-17share offering or dilution eventrecentOpen filing ↗
    “…1,163 4,839 Other non-current liabilities ( 1,244 ) 1,441 Net cash used in operating activities ( 37,438 ) ( 20,345 ) Investing…”
    +1 more passage from the same document
    • “…of cash flow information Cash paid for interest $ 4,270 $ 8,841 Cash paid for income taxes, net $ 556 $ 1,798 Non-cash…”
  • 2026-02-17listing compliance noticerecentOpen filing ↗
    “…business combination and investment transactions; the execution, timing and results of any transformation or restructuring plans,…”
  • 2026-02-17capital return (buybacks/dividends)recentOpen filing ↗
    “…Forbearance Warrant The Forbearance Warrant, issued on September 23, 2025, has an exercise price of $ 8.81 per share,…”
    +1 more passage from the same document
    • “…80 % of the seven-day volume-weighted average price as of September 22, 2025, and is exercisable until the seventh…”

Original excerpts from SEC filings, untranslated. Not advice and not a prediction.

Reverse splits in 5 years

1 reverse split in 5 years (1:20 on Aug 27, 2024) · 1:20 cumulative

The other times: of 818 securities that did their first reverse split in 5 years, a year later the median was worth 0.53× the price on the day of the split; 382 lost more than half and 209 rose (809 with a price a year later).

Our own series, not the whole market: based on the splits we have on record (provider and SEC); an unrecorded one does not count. Historical distribution, not a prediction.

SEC record

SEC dossier

What this company has filed with the SEC, in plain language.

The 25 most recent filings (of 1,783)

Everything filed

Every SEC filing, newest first, with what it is. Below, each type with its own explanation.

  • Oct 9, 268-K ↗Current report · A senior executive left or was appointed
  • Insider transaction · 9 Form 4 filingsshow all 9hide
  • Sep 28, 268-K ↗Current report · A senior executive left or was appointed
  • Sep 17, 268-K ↗Current report · Shareholder vote results
  • Sep 8, 26Form 3 ↗Insider transaction
  • Sep 1, 268-K ↗Current report · A senior executive left or was appointed
  • Aug 14, 268-K ↗Current report · A senior executive left or was appointed
  • Aug 14, 26SCHEDULE 13G ↗Passive stake · Alyeska Investment Group, L.P. · 6.7% · event on Jun 30, 26
  • Aug 14, 26SCHEDULE 13G ↗Passive stake · Two Seas Capital LP · 6.3% · event on Jun 30, 26
  • Aug 11, 2610-Q ↗Quarterly report
  • Aug 10, 268-K ↗Current report · Results
  • Aug 10, 26SCHEDULE 13G ↗Passive stake · Oaktree Capital Management LP · 5.1% · event on Jun 30, 26
  • Aug 5, 26Form 4 ↗Insider transaction
  • Jul 29, 26DEFA14A ↗Shareholder meeting and votes
  • Jul 29, 26DEF 14A ↗Shareholder meeting and votes
  • Jul 27, 26424B3 ↗Securities offering
  • Jul 14, 26S-1 ↗Securities offering

1,783 filings on record, the oldest from Jan 28, 94.

Listing the 25 most recent filings of the 1,783 on record.

8-Ks, explained

Stress22Structure121Governance86
  • Governance4 senior executive changes2026show all 4hide
    • Oct 9, 26GovernanceA senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
    • Sep 28, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
    • Sep 1, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
    • Aug 14, 26GovernanceA senior executive left or was appointed8-K 5.02 ↗
  • Jun 5, 26StructureA material agreement was terminated+2 more in the same filing8-K 1.02 ↗
  • Jun 2, 26StructureSold unregistered shares+5 more in the same filing8-K 3.02 ↗
  • Feb 2, 26GovernanceA senior executive left or was appointed+2 more in the same filing8-K 5.02 ↗
  • Dec 18, 25StructureTook on a new financial obligation+4 more in the same filing8-K 2.03 ↗
  • Oct 6, 25GovernanceAuditor change filing (8-K Item 4.01)8-K 4.01 ↗
  • Sep 23, 25StructureTook on a new financial obligation+4 more in the same filing8-K 2.03 ↗
  • Aug 28, 25GovernanceA senior executive left or was appointed+1 more in the same filing8-K 5.02 ↗
  • Aug 26, 25StressListing notice (8-K 3.01)+2 more in the same filing8-K 3.01 ↗
  • Aug 18, 25StructureA material agreement was terminated+3 more in the same filing8-K 1.02 ↗
  • Aug 8, 25StressPast accounts declared unreliable and being restated8-K 4.02 ↗
  • Jul 23, 25StressListing notice (8-K 3.01)+2 more in the same filing8-K 3.01 ↗

7 older filings not shown · The record reaches back to Sep 1, 04.

Notable in the record

Stress disclosures older than the timeline above. They are individual events from the record, not a complete timeline: there may be more between them.

  • Oct 10, 24StressListing notice (8-K 3.01)8-K 3.01 ↗
  • May 29, 24StressPast accounts declared unreliable and being restated+3 more in the same filing8-K 4.02 ↗
  • Mar 25, 24StressListing notice (8-K 3.01)+2 more in the same filing8-K 3.01 ↗
  • Feb 14, 24StressListing notice (8-K 3.01)8-K 3.01 ↗
  • Nov 17, 23StressListing notice (8-K 3.01)+2 more in the same filing8-K 3.01 ↗
  • Sep 26, 23StressListing notice (8-K 3.01)8-K 3.01 ↗
  • Jun 6, 23StressRestructuring plan with committed costs+5 more in the same filing8-K 2.05 ↗

The full record holds 22 stress filings.

Corporate events are tracked from 2004-08-23, when the SEC renumbered 8-K items. Earlier filings use an incompatible numbering and are not classified here.

Ownership and control

Schedule 13D: stake and stated purpose

Filed by holders above 5% of a share class who cannot use the short form. It includes the investor's stated purpose: read it before assuming they seek influence.

  • JOHN FICHTHORN41.4%Jan 8, 26SCHEDULE 13D/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum. · 2 earlier filings
  • Dialectic Technology SPV LLC40.0%Jun 4, 26SCHEDULE 13D/A ↗3 co-filers on this document — the figure is the largest single stake, not their sum.
  • Pacific Investment Management Company LLC14.7%Mar 27, 25SCHEDULE 13D/A ↗2 earlier filings
  • Blue Torch Capital LP2.3%Feb 13, 25SCHEDULE 13D/A ↗2 co-filers on this document — the figure is the largest single stake, not their sum. · 1 earlier filing

Schedule 13G: short-form filing

The short form, for holders who meet specific requirements: institutional investors, passive investors without a control purpose, or exempt investors. Asset managers and index funds usually file it.

  • Alyeska Investment Group, L.P.6.7%Jun 30, 26SCHEDULE 13G ↗3 co-filers on this document — the figure is the largest single stake, not their sum.
  • Two Seas Capital LP6.3%Jun 30, 26SCHEDULE 13G ↗3 co-filers on this document — the figure is the largest single stake, not their sum.
  • Oaktree Capital Management LP5.1%Jun 30, 26SCHEDULE 13G ↗
  • The Vanguard Group5.0%Dec 31, 24SCHEDULE 13G/A ↗

Structured 13D/G data starts 2023-12, when the SEC moved these filings to a machine-readable format. Earlier filings exist but are not parsed here.

SEC record

Insider transactions

Buys and sells reported by officers, directors and major shareholders on SEC Form 4.

Buys and sells

  • Aug 3, 26Sell$16KAnthony CraythorneChief Revenue Officer↗
  • Jul 2, 26Sell$65KHugues MeyrathPresident & CEO↗
  • Jul 2, 26Sell$3KLaura A. NashChief Accounting Officer↗
  • Apr 2, 26Sell$593Laura A. NashChief Accounting Officer↗
  • Oct 2, 25Sell$32KHugues MeyrathPresident & CEO↗
  • Oct 2, 25Sell$7KLaura A. NashChief Accounting Officer↗
  • Oct 1, 25Sell$1KLaura A. NashChief Accounting Officer↗
  • Sep 12, 25Sell$2KLaura A. NashChief Accounting Officer↗
  • Apr 21, 25Sell$10KBrian E CabreraSVP Chief Admin Ofcr & Secy↗
  • Apr 21, 25Sell$27KJames J LernerPresident & CEO↗
  • Apr 21, 25Sell$2KLewis W. MooreheadChief Accounting Officer↗
  • Apr 15, 25Sell$9.9MPACIFIC INVESTMENT MANAGEMENT CO LLC↗
Stock compensation, tax and giftsshow the 28 other transactionshide

Stock compensation, tax withholding, option exercises and gifts. They are listed separately and are not included in the purchase and sale totals. The type describes the transaction, not the filer's intent.

  • Oct 1, 26Compensationamount n/aDon Jaworksi↗
  • Oct 1, 26Compensationamount n/aHiral PatelChief Accounting Officer↗
  • Oct 1, 26Compensationamount n/aJames C ClancyChief Operating Officer↗
  • Oct 1, 26Compensationamount n/aJOHN FICHTHORN↗
  • Oct 1, 26Compensationamount n/aJohn R. Tracy↗
  • Oct 1, 26Compensationamount n/aTony J Blevins↗
  • Oct 1, 26Compensationamount n/aYue Zhou White↗
  • Jun 4, 26Other$57.2MDialectic Technology SPV LLC↗
  • Jun 4, 26Compensation$16.0MDialectic Technology SPV LLC↗
  • Jun 4, 26Other$57.2MJOHN FICHTHORN↗
  • Jun 4, 26Compensation$16.0MJOHN FICHTHORN↗
  • Mar 4, 26Compensationamount n/aWilliam Hillis WhiteChief Financial Officer↗
  • Jan 1, 26Compensationamount n/aJohn R. Tracy↗
  • Jan 1, 26Compensationamount n/aJOHN FICHTHORN↗
  • Jan 1, 26Compensationamount n/aDon Jaworksi↗
  • Jan 1, 26Compensationamount n/aTony J Blevins↗
  • Jan 1, 26Compensationamount n/aJames C Clancy↗
  • Jan 1, 26Compensationamount n/aYue Zhou White↗
  • Jan 1, 26Compensationamount n/aHugues MeyrathPresident & CEO↗
  • Jan 1, 26Compensationamount n/aAnthony CraythorneChief Revenue Officer↗
  • Nov 1, 25Compensationamount n/aHugues MeyrathPresident & CEO↗
  • Nov 1, 25Compensationamount n/aTony J Blevins↗
  • Nov 1, 25Compensationamount n/aJames C Clancy↗
  • Oct 1, 25Compensationamount n/aLaura A. NashChief Accounting Officer↗
  • May 1, 25Compensationamount n/aJOHN FICHTHORN↗
  • Apr 21, 25Compensationamount n/aBrian E CabreraSVP Chief Admin Ofcr & Secy↗
  • Apr 21, 25Compensationamount n/aJames J LernerPresident & CEO↗
  • Apr 21, 25Compensationamount n/aLewis W. MooreheadChief Accounting Officer↗

The full record holds 95 transactions and goes back to Feb 1, 23.

Its sector and its market

Quantum Corporation among Information Technology companies

The profile shows what is on record. Context and Radar place the company among those of its sector and region.

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Coverage

What sits behind this page.

Where each figure comes from and how far it reaches.

Prices
End-of-day closes provided by Twelve Data. One close per session; not real time. Closes adjusted for splits.
Series quality
Series with incidents in the period; the chart shows what could be kept.
SEC records
1,783 documents on file, from Jan 28, 1994 to Oct 9, 2026.
Company description
No description available.
This page
Generated on Oct 19, 2026; refreshed through the day.

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Which SEC documents appear here?

Those filed with the SEC by the company, its insiders and its major shareholders, within our coverage: periodic reports (10-K, 10-Q, 20-F), material events (8-K), proposed sale notices (Form 144), insider transactions (Form 4) and stakes above 5% (13D/13G). Each links to the original on EDGAR.

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