Quantum Corp is a United States-based company that delivers end-to-end data management solutions designed for unstructured data in the era of artificial intelligence (AI). It provides comprehensive and cost-efficient solutions for the entire data lifecycle. The group provides solutions for video, images, audio, and other large files because this unstructured data represents. Its portfolio of products includes primary storage software and systems, secondary storage software and systems, as well as devices and media. The group operates in three geographic regions: Americas, Europe, the Middle East, and Africa (EMEA), and Asia Pacific (APAC).
QMCO Form 4 activity by transaction type, last 90 days
Form 4 transaction type
Transactions
Shares
Total value
Open-market sale
1
1,478
$16K
Grant or award
10
1,360,000
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
QMCO insider transactions (Form 4)
41
41 Form 4 filings on record, the earliest from Oct 21, 2024, newest first. Filing history page 1 of 2.
Footnote F1 (shares): Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in full on the earlier of October 1, 2027 or the date of the Companys next annual meeting of stockholders, in each case subject to the… Full note on SEC EDGAR
Footnote F1 (shares): Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in full on the earlier of October 1, 2027 or the date of the Companys next annual meeting of stockholders, in each case subject to the… Full note on SEC EDGAR
Footnote F1 (shares): Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in full on the earlier of October 1, 2027 or the date of the Companys next annual meeting of stockholders, in each case subject to the… Full note on SEC EDGAR
Footnote F1 (shares): Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in full on the earlier of October 1, 2027 or the date of the Companys next annual meeting of stockholders, in each case subject to the… Full note on SEC EDGAR
Footnote F1 (shares): Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in three equal annual installments beginning on October 1, 2027, with a vesting commencement date of October 1, 2026, subject to the… Full note on SEC EDGAR
Footnote F1 (shares): Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in three equal annual installments beginning on October 1, 2027, with a vesting commencement date of October 1, 2026, subject to the… Full note on SEC EDGAR
Footnote F1 (shares): Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in full on the earlier of October 1, 2027 or the date of the Companys next annual meeting of stockholders, in each case subject to the… Full note on SEC EDGAR
Footnote F1 (shares): Represents the number of shares automatically sold on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units granted on January 1, 2026. This Form 4 is a required filing under the Securities Exchange Act of 1934… Full note on SEC EDGAR
Footnote F2 (price): The shares were sold on August 3, 2026 at a price of $10.7281 per share.
Footnote F1 (shares): Represents the number of shares automatically sold on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units granted on July 1, 2023. This Form 4 is a required filing under the Securities Exchange Act of 1934, and… Full note on SEC EDGAR
Footnote F2 (price): Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on July 2, 2026, at a price ranging from $10.48 to $10.53. The Reporting Person undertakes to provide upon request by the Securities and Exchange… Full note on SEC EDGAR
Footnote F1 (shares): Represents the number of shares automatically sold on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units granted on November 1, 2025 and January 1, 2026.This Form 4 is a required filing under the Securities… Full note on SEC EDGAR
Footnote F2 (price): Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on July 2, 2026, at a price ranging from $10.48 to $10.53. The Reporting Person undertakes to provide upon request by the Securities and Exchange… Full note on SEC EDGAR
Footnote F1 (price, shares): On June 4, 2026 (the "Closing Date"), pursuant to a Conversion Agreement dated June 1, 2026 (the "Conversion Agreement"), by and among, among others, the Issuer and Dialectic (as defined below), Dialectic converted $57,241,228.00 of the previously issued 10.00% PIK senior… Full note on SEC EDGAR
Footnote F2 (shares): In connection with the Conversion, on the Closing Date, the Convertible Notes were cancelled, and the Issuer issued to Dialectic 11,020,645 shares of Common Stock (as defined below).
Footnote F3 (price): These securities are held directly by Dialectic, a 10% holder of the Issuer, and indirectly by John Fichthorn. Mr. Fichthorn is the Manager of Dialectic Technology Manager LLC, the Manager of Dialectic. The Reporting Person disclaims beneficial ownership of these securities… Full note on SEC EDGAR
Footnote F6 (price, shares): On June 1, 2026 ("Issuance Date"), the Issuer issued to Dialectic Technology SPV LLC ("Dialectic") a warrant (the "Conversion Warrant") to purchase 105,911 (as may be adjusted pursuant to the Conversion Warrant) shares of common stock, par value $0.01 per share of the Issuer… Full note on SEC EDGAR
Footnote F1 (price, shares): On June 1, 2026 ("Issuance Date"), the Issuer issued to Dialectic Technology SPV LLC ("Dialectic") a warrant (the "Conversion Warrant") to purchase 105,911 (as may be adjusted pursuant to the Conversion Warrant) shares of common stock, par value $0.01 per share of the Issuer… Full note on SEC EDGAR
Footnote F2 (price, value): On June 4, 2026 (the "Closing Date"), pursuant to a Conversion Agreement dated June 1, 2026 (the "Conversion Agreement"), by and among, among others, the Issuer and Dialectic, Dialectic converted $57,241,228.00 of the previously issued senior secured convertible notes (the… Full note on SEC EDGAR
Footnote F3 (price, value): In connection with the Conversion, on the Closing Date, the Convertible Notes were cancelled, and the Issuer issued to Dialectic 11,020,645 shares of Common Stock.
Footnote F1 (shares): Represents the number of shares automatically sold on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units granted on April 1, 2024.
Footnote F2 (price): Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on April 2, 2026, at a price ranging from $5.43 to $5.45. The Reporting Person undertakes to provide upon request by the Securities and Exchange… Full note on SEC EDGAR
Footnote F3 (shares): This nonstatutory stock option vests over four years in equal monthly installments beginning on April 1, 2026, subject to the Reporting Persons continued service through each vesting date.
Footnote F1 (shares): This nonstatutory stock option vests over four years in equal monthly installments beginning on April 1, 2026, subject to the Reporting Person's continued service through each vesting date.
Footnote F1 (shares): This nonstatutory stock option vests over four years in equal monthly installments beginning on April 1, 2026, subject to the Reporting Person's continued service through each vesting date.
Footnote F1 (shares): Grant of 25,000 restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in three equal annual installments beginning on March 2, 2027, subject to the Reporting Person's continued service through each… Full note on SEC EDGAR
Footnote F1 (price, value): On December 18, 2025 (the "Closing Date"), the Issuer issued senior secured convertible notes (the "Convertible Notes") in the aggregate principal amount of $54,718,114 to Dialectic Technology SPV LLC ("Dialectic"). The Convertible Notes mature December 18, 2028 (the "Maturity… Full note on SEC EDGAR
Footnote F2 (price, value): Based on the Conversion Price as of the Closing Date, the Convertible Notes were convertible into 5,471,811 shares of Common Stock. At the Issuer's option, all outstanding principal amount, accrued and unpaid interest and premium, if any, of any Convertible Notes outstanding on… Full note on SEC EDGAR
Footnote F1 (shares): Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in full on the earlier of November 1, 2026 or the date of the Company's next annual stockholder meeting, subject to continued service… Full note on SEC EDGAR
Footnote F1 (shares): Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in full on the earlier of November 1, 2026 or the date of the Company's next annual stockholder meeting, subject to continued service… Full note on SEC EDGAR
Footnote F1 (shares): Grant of restricted stock units (RSUs), each of which represents a contingent right to receive one share of common stock of QMCO. The RSUs vest in four equal annual installments beginning on July 1, 2026, with a vesting commencement date of July 1, 2025, subject to the Reporting… Full note on SEC EDGAR
Footnote F2 (shares): This nonstatutory stock option vests in four equal annual installments beginning on July 1, 2026, with a vesting commencement date of July 1, 2025, subject to the Reporting Person's continued service through each vesting date.
Footnote F1 (shares): Represents the number of shares automatically sold on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units granted on October 1, 2024.
Footnote F2 (price): Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on October 2, 2025, at a price ranging from $10.85 to $10.87. The reporting person undertakes to provide upon request by the Securities and Exchange… Full note on SEC EDGAR
Footnote F1 (shares): Represents the number of shares automatically sold on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of performance-based stock units granted on July 1, 2023.
Footnote F2 (price): Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on October 1, 2025, at a price ranging from $9.9026 to $9.9118. The reporting person undertakes to provide upon request by the Securities and Exchange… Full note on SEC EDGAR
Footnote F3 (shares): Represents the number of shares automatically sold on a non-discretionary basis, to cover tax withholding obligations in connection with the vesting of restricted stock units granted on October 1, 2024.
Footnote F4 (price): Represents a weighted average price. These shares were sold as part of block trades for multiple security holders of the issuer on October 2, 2025, at a price ranging from $10.85 to $10.87. The reporting person undertakes to provide upon request by the Securities and Exchange… Full note on SEC EDGAR
QUANTUM CORP /DE/ (QMCO) had 10 insider filings in the last 90 days, with the most recent on 2026-10-05. The full record for QMCO runs to 41 Form 4 filings, the earliest from 2024-10-21. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying QMCO stock?
No insider purchases of QMCO were filed in the last 90 days.
How many insiders are selling QMCO stock?
1 insider sale of QMCO was filed in the last 90 days, totaling $16K.
Where can I see QMCO SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects QMCO Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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