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These shares are reflected on Table I, and 37,500 units remaining subject to these performance-based and time-based vesting conditions."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 4,715 shares acquired under Quantum Corporation's Employee Stock Purchase Plan on February 5, 2021."}],"balance_after":661370,"source":{"system":"sec-edgar","filing":"0000709283-21-000007","document":"wf-form4_161584263658780.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928321000007/wf-form4_161584263658780.xml","form_type":"4"}},{"id":2929744,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":22140,"kind":"person","name":"DODSON J MICHAEL","position":1,"cik":"0001231559","reported_name":"DODSON J MICHAEL","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, CFO"}}],"security":"Common Stock","published_at":"2020-12-31T00:49:18.000Z","date":"2020-12-30","kind":"sale","acquired":false,"shares":33999,"price":5.6326,"value":191502.7674,"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 performance stock units granted on September 6, 2019."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This is the price of the shares sold, $5.6326 per share. Upon request by the Commission staff, Quantum Corporation, or a security holder of Quantum Corporation, the Reporting Person will provide full information regarding the number of shares sold at this price as set forth in this Form 4."}],"balance_after":539155,"source":{"system":"sec-edgar","filing":"0000709283-20-000047","document":"wf-form4_160937574208830.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928320000047/wf-form4_160937574208830.xml","form_type":"4"}},{"id":3042029,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":22140,"kind":"person","name":"DODSON J MICHAEL","position":1,"cik":"0001231559","reported_name":"DODSON J MICHAEL","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, CFO"}}],"security":"Common Stock","published_at":"2020-09-02T17:54:32.000Z","date":"2020-08-31","kind":"sale","acquired":false,"shares":13132,"price":5.5784,"value":73255.5488,"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 June 1, 2018."}],"balance_after":573154,"source":{"system":"sec-edgar","filing":"0000709283-20-000028","document":"wf-form4_159906925670784.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928320000028/wf-form4_159906925670784.xml","form_type":"4"}},{"id":3047072,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":22140,"kind":"person","name":"DODSON J MICHAEL","position":1,"cik":"0001231559","reported_name":"DODSON J MICHAEL","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, CFO"}}],"security":"Common Stock","published_at":"2020-08-26T20:22:28.000Z","date":"2020-08-24","kind":"sale","acquired":false,"shares":12266,"price":5.3822,"value":66018.0652,"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 performance stock units granted on June 1, 2018."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This is the weighted average price of the shares sold, which ranged from $5.3798 to $5.52 per share. Upon request by the Commission staff, Quantum Corporation, or a security holder of the Quantum Corporation, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes 3,975 shares acquired under Quantum Corporation's Employee Stock Purchase Plan on August 5, 2020."}],"balance_after":586286,"source":{"system":"sec-edgar","filing":"0000709283-20-000023","document":"wf-form4_159847333162546.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928320000023/wf-form4_159847333162546.xml","form_type":"4"}},{"id":3094091,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":22140,"kind":"person","name":"DODSON J MICHAEL","position":1,"cik":"0001231559","reported_name":"DODSON J MICHAEL","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, CFO"}}],"security":"Performance-Based Restricted Stock Units","published_at":"2020-07-02T20:31:30.000Z","date":"2020-07-01","kind":"grant","acquired":false,"shares":75000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Grant of Performance-Based Restricted Stock Units (\"PSUs\"), each of which represents a contingent right to receive one share of common stock of QMCO, with vesting subject to the achievement of specified levels of the average closing prices of a share of QMCO common stock during any one hundred (100) calendar day period occurring between July 1, 2020 and July 1, 2025. Vesting is subject to continued employment with QMCO through the later of the achievement date or service vesting date, which occurs in two equal installments on January 1, 2022 and July 1, 2023."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Grant of Performance-Based Restricted Stock Units (\"PSUs\"), each of which represents a contingent right to receive one share of common stock of QMCO, with vesting subject to the achievement of specified levels of the average closing prices of a share of QMCO common stock during any one hundred (100) calendar day period occurring between July 1, 2020 and July 1, 2025. Vesting is subject to continued employment with QMCO through the later of the achievement date or service vesting date, which occurs in two equal installments on January 1, 2022 and July 1, 2023."}],"balance_after":0,"derivative":{"expiration_date":"2025-07-01","underlying":"Common Stock","underlying_shares":75000},"source":{"system":"sec-edgar","filing":"0000709283-20-000018","document":"wf-form4_159372182578185.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928320000018/wf-form4_159372182578185.xml","form_type":"4"}},{"id":3094090,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":22140,"kind":"person","name":"DODSON J MICHAEL","position":1,"cik":"0001231559","reported_name":"DODSON J MICHAEL","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, CFO"}}],"security":"Common Stock","published_at":"2020-07-02T20:31:30.000Z","date":"2020-07-01","kind":"grant","acquired":true,"shares":150000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","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.  Vesting is subject to continued employment with QMCO through the service vesting date, which occurs in three equal annual installments on July 1, 2021, July 1, 2022 and July 1, 2023."}],"balance_after":594577,"source":{"system":"sec-edgar","filing":"0000709283-20-000018","document":"wf-form4_159372182578185.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/709283/000070928320000018/wf-form4_159372182578185.xml","form_type":"4"}},{"id":3131948,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":22140,"kind":"person","name":"DODSON J MICHAEL","position":1,"cik":"0001231559","reported_name":"DODSON J MICHAEL","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2020-05-28T22:07:58.000Z","date":"2020-05-27","kind":"grant","acquired":true,"shares":5466,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each share is represented by a Restricted Stock Unit (\"RSU\"). The RSUs will vest on the earlier of the first anniversary of the grant date or the date of the Issuer's next Annual Meeting, subject to the Reporting Person's continued service as of such date."}],"balance_after":37245,"source":{"system":"sec-edgar","filing":"0001580808-20-000053","document":"wf-form4_159070366030366.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1231559/000158080820000053/wf-form4_159070366030366.xml","form_type":"4"}},{"id":3201364,"issuer":{"id":4987,"kind":"organization","name":"QUANTUM CORP /DE/","symbol":"QMCO"},"owners":[{"id":22140,"kind":"person","name":"DODSON J MICHAEL","position":1,"cik":"0001231559","reported_name":"DODSON J MICHAEL","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Senior Vice President, CFO"}}],"security":"Performance-Based Restricted Stock Units","published_at":"2020-03-19T20:37:05.000Z","date":"2020-03-17","kind":"exercise","acquired":false,"shares":80000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Performance-Based Restricted Stock Units were previously reported on September 10, 2019, which vest in three equal components upon the later of achievement of specified levels of the average closing prices of a share of QMCO common stock during any hundred (100) calendar day period, and upon specified service dates, whichever is later. The first performance achievement date occurred on March 17, 2020, as certified by the leadership and compensation committee of QMCO, resulting in 80,000 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest on September 5, 2020 subject to continued employment. These shares are reflected on Table I, and 160,000 units remaining subject to these performance-based and time-based vesting conditions"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Performance-Based Restricted Stock Units were previously reported on September 10, 2019, which vest in three equal components upon the later of achievement of specified levels of the average closing prices of a share of QMCO common stock during any hundred (100) calendar day period, and upon specified service dates, whichever is later. The first performance achievement date occurred on March 17, 2020, as certified by the leadership and compensation committee of QMCO, resulting in 80,000 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest on September 5, 2020 subject to continued employment. 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The third performance achievement date occurred on March 17, 2020, as certified by the leadership and compensation committee of QMCO, resulting in 41,666 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest on May 31, 2021, subject to continued employment. These shares are reflected on Table I, and no units remain that are subject to these performance-based and time-based vesting conditions."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on August 27, 2019, which vest in three equal components upon the later of achievement of specified levels of the average closing prices of a share of QMCO common stock during any sixty (60) day trading period between June 1, 2018 and May 31, 2022, and upon specified service dates, whichever is later. 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