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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\n$10.53. The Reporting Person undertakes to provide upon request by the Securities and Exchange Commission, the issuer, or a securityholder of the issuer detailed information regarding\nthe number of shares sold and the prices at which the transactions were executed."}],"balance_after":118468,"source":{"system":"sec-edgar","filing":"0001628280-26-047487","document":"wk-form4_1783454856.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000162828026047487/wk-form4_1783454856.xml","form_type":"4"}},{"id":818114,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":31877,"kind":"person","name":"Meyrath Hugues","position":1,"cik":"0001419111","reported_name":"Meyrath Hugues","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Employee Stock Option (right to buy)","published_at":"2026-04-03T20:15:08.000Z","date":"2026-04-01","kind":"grant","planned":false,"acquired":true,"shares":850000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"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."}],"balance_after":850000,"derivative":{"exercise_price":5.03,"expiration_date":"2033-04-01","underlying":"Common Stock","underlying_shares":850000},"source":{"system":"sec-edgar","filing":"0001193125-26-142179","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000119312526142179/ownership.xml","form_type":"4"}},{"id":954214,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":31877,"kind":"person","name":"Meyrath Hugues","position":1,"cik":"0001419111","reported_name":"Meyrath Hugues","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Employee Stock Option (right to buy)","published_at":"2026-01-06T00:28:37.000Z","date":"2026-01-01","kind":"grant","planned":false,"acquired":true,"shares":50000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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."}],"balance_after":50000,"derivative":{"exercise_price":6.45,"expiration_date":"2033-01-01","underlying":"Common Stock","underlying_shares":50000},"source":{"system":"sec-edgar","filing":"0001628280-26-000750","document":"wk-form4_1767659314.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/709283/000162828026000750/wk-form4_1767659314.xml","form_type":"4"}},{"id":954213,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":31877,"kind":"person","name":"Meyrath Hugues","position":1,"cik":"0001419111","reported_name":"Meyrath Hugues","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2026-01-06T00:28:37.000Z","date":"2026-01-01","kind":"grant","planned":false,"acquired":true,"shares":62500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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 Person's continued service through each vesting date."}],"balance_after":124700,"source":{"system":"sec-edgar","filing":"0001628280-26-000750","document":"wk-form4_1767659314.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000162828026000750/wk-form4_1767659314.xml","form_type":"4"}},{"id":1008999,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":31877,"kind":"person","name":"Meyrath Hugues","position":1,"cik":"0001419111","reported_name":"Meyrath Hugues","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Employee Stock Option (right to buy)","published_at":"2025-11-05T00:00:10.000Z","date":"2025-11-01","kind":"grant","planned":false,"acquired":true,"shares":50000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"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."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"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."}],"balance_after":50000,"derivative":{"exercise_price":9.44,"expiration_date":"2032-11-01","underlying":"Common Stock","underlying_shares":50000},"source":{"system":"sec-edgar","filing":"0001419111-25-000003","document":"wk-form4_1762300800.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/709283/000141911125000003/wk-form4_1762300800.xml","form_type":"4"}},{"id":1008998,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":31877,"kind":"person","name":"Meyrath Hugues","position":1,"cik":"0001419111","reported_name":"Meyrath Hugues","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2025-11-05T00:00:10.000Z","date":"2025-11-01","kind":"grant","planned":false,"acquired":true,"shares":37500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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 Person's continued service through each vesting date."}],"balance_after":62200,"source":{"system":"sec-edgar","filing":"0001419111-25-000003","document":"wk-form4_1762300800.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000141911125000003/wk-form4_1762300800.xml","form_type":"4"}},{"id":1025934,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":31877,"kind":"person","name":"Meyrath Hugues","position":1,"cik":"0001419111","reported_name":"Meyrath Hugues","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President & CEO"}}],"security":"Common Stock","published_at":"2025-10-03T21:22:06.000Z","date":"2025-10-02","kind":"sale","planned":false,"acquired":false,"shares":2975,"price":10.86,"value":32308.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"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\nOctober 1, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"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 Commission, the issuer, or a securityholder of the issuer detailed information regarding the number of shares sold and the prices at which the transactions were executed."}],"balance_after":24700,"source":{"system":"sec-edgar","filing":"0001628280-25-044169","document":"wk-form4_1759526523.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000162828025044169/wk-form4_1759526523.xml","form_type":"4"}},{"id":1383793,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":31877,"kind":"person","name":"Meyrath Hugues","position":1,"cik":"0001419111","reported_name":"Meyrath Hugues","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-10-21T21:16:30.000Z","date":"2024-10-01","kind":"grant","planned":false,"acquired":true,"shares":12000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Grant of 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, 2025 or the date of the\nCompany's next annual stockholder meeting, subject to continued service on the Company's Board of Directors, Delayed filing arose from an error related to effecting the reverse stock split within QMCOs stock plan administration platform and the resulting delay of the distribution of the equity award agreement to reporting person.  Reporting person has elected to continue to use the grant date for the reported transaction date notwithstanding the delayed distribution of the equity award agreement."}],"balance_after":97498,"source":{"system":"sec-edgar","filing":"0000709283-24-000027","document":"wk-form4_1729545382.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928324000027/wk-form4_1729545382.xml","form_type":"4"}},{"id":1383792,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":31877,"kind":"person","name":"Meyrath Hugues","position":1,"cik":"0001419111","reported_name":"Meyrath Hugues","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2024-10-21T21:16:30.000Z","date":"2024-10-01","kind":"grant","planned":false,"acquired":true,"shares":12000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Grant of fully vested Restricted Stock Units (RSUs), each of which represents a right to receive one share of common stock of QMCO."}],"balance_after":85498,"source":{"system":"sec-edgar","filing":"0000709283-24-000027","document":"wk-form4_1729545382.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928324000027/wk-form4_1729545382.xml","form_type":"4"}},{"id":2103829,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":31877,"kind":"person","name":"Meyrath Hugues","position":1,"cik":"0001419111","reported_name":"Meyrath Hugues","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2022-11-28T23:09:40.000Z","date":"2022-11-09","kind":"grant","acquired":true,"shares":73498,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Grant of Restricted Stock Units (\"RSUs\"), each of which represents a contingent right to receive one share of common stock of QMCO (the \"Company\"). The RSUs vest in full on the date of the Company's next annual stockholder meeting, subject to continued service on the Company's Board of Directors."}],"balance_after":73498,"source":{"system":"sec-edgar","filing":"0000709283-22-000054","document":"wf-form4_166967696257249.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928322000054/wf-form4_166967696257249.xml","form_type":"4"}}]}