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The last milestone achievement date occurred on September 2, 2021, as certified by the compensation committee of ATEN on September 11, 2021, resulting in 13,972 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on September 16, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of September 2, 2021, subject to continued employment. These shares are reflected on Table I."}],"balance_after":180215,"source":{"system":"sec-edgar","filing":"0001580808-21-000151","document":"wf-form4_163165872591227.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000151/wf-form4_163165872591227.xml","form_type":"4"}},{"id":2583301,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Common Stock","published_at":"2021-09-01T17:26:32.000Z","date":"2021-08-31","kind":"sale","acquired":false,"shares":1394,"price":14,"value":19516.0,"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."}],"balance_after":166243,"source":{"system":"sec-edgar","filing":"0001580808-21-000144","document":"wf-form4_163053157107966.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000144/wf-form4_163053157107966.xml","form_type":"4"}},{"id":2594624,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Performance-based Restricted Stock Units","published_at":"2021-08-20T19:43:28.000Z","date":"2021-08-19","kind":"exercise","acquired":false,"shares":13972,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on February 4, 2021, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) calendar day trading period between February 2, 2021 and  February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 13,972 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on February 4, 2021, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) calendar day trading period between February 2, 2021 and  February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 13,972 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I."}],"balance_after":13972,"derivative":{"expiration_date":"2025-02-02","underlying":"Common Stock","underlying_shares":13972},"source":{"system":"sec-edgar","filing":"0001580808-21-000132","document":"wf-form4_162950299389760.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000132/wf-form4_162950299389760.xml","form_type":"4"}},{"id":2594623,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Common Stock","published_at":"2021-08-20T19:43:28.000Z","date":"2021-08-19","kind":"exercise","acquired":true,"shares":13972,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on February 4, 2021, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) calendar day trading period between February 2, 2021 and  February 2, 2025. The second milestone achievement date occurred on August 17, 2021, as certified by the compensation committee of ATEN on August 19, 2021, resulting in 13,972 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on August 30, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of August 17, 2021, subject to continued employment. These shares are reflected on Table I."}],"balance_after":167637,"source":{"system":"sec-edgar","filing":"0001580808-21-000132","document":"wf-form4_162950299389760.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000132/wf-form4_162950299389760.xml","form_type":"4"}},{"id":2605209,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Performance-based Restricted Stock Units","published_at":"2021-08-12T16:05:50.000Z","date":"2021-08-10","kind":"exercise","acquired":false,"shares":33334,"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 May 1, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between April 29, 2020 and April 29, 2024. The last milestone achievement occurred on August 5, 2021, as certified by the compensation committee of ATEN on August 10, 2021, resulting in 33,334 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Performance-Based Restricted Stock Units were previously reported on May 1, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between April 29, 2020 and April 29, 2024. The last milestone achievement occurred on August 5, 2021, as certified by the compensation committee of ATEN on August 10, 2021, resulting in 33,334 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I."}],"balance_after":0,"derivative":{"expiration_date":"2024-04-29","underlying":"Common Stock","underlying_shares":33334},"source":{"system":"sec-edgar","filing":"0001580808-21-000124","document":"wf-form4_162879872892394.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000124/wf-form4_162879872892394.xml","form_type":"4"}},{"id":2605208,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Performance-based Restricted Stock Units","published_at":"2021-08-12T16:05:50.000Z","date":"2021-08-02","kind":"exercise","acquired":false,"shares":13972,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on February 4, 2021, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 2, 2021 and February 2, 2025. The achievement of the first milestone occurred on July 30, 2021, as certified by the compensation committee August 2, 2021, resulting in 13,972 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on August 9, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of July 30, 2021, subject to continued employment. These shares are reflected on Table I."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on February 4, 2021, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 2, 2021 and February 2, 2025. The achievement of the first milestone occurred on July 30, 2021, as certified by the compensation committee August 2, 2021, resulting in 13,972 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on August 9, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of July 30, 2021, subject to continued employment. These shares are reflected on Table I."}],"balance_after":27944,"derivative":{"expiration_date":"2025-02-02","underlying":"Common Stock","underlying_shares":13972},"source":{"system":"sec-edgar","filing":"0001580808-21-000124","document":"wf-form4_162879872892394.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000124/wf-form4_162879872892394.xml","form_type":"4"}},{"id":2605207,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Common Stock","published_at":"2021-08-12T16:05:50.000Z","date":"2021-08-10","kind":"sale","acquired":false,"shares":1394,"price":13.34,"value":18595.96,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","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."}],"balance_after":153665,"source":{"system":"sec-edgar","filing":"0001580808-21-000124","document":"wf-form4_162879872892394.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000124/wf-form4_162879872892394.xml","form_type":"4"}},{"id":2605206,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Common Stock","published_at":"2021-08-12T16:05:50.000Z","date":"2021-08-10","kind":"exercise","acquired":true,"shares":33334,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Performance-Based Restricted Stock Units were previously reported on May 1, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between April 29, 2020 and April 29, 2024. The last milestone achievement occurred on August 5, 2021, as certified by the compensation committee of ATEN on August 10, 2021, resulting in 33,334 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I."}],"balance_after":155059,"source":{"system":"sec-edgar","filing":"0001580808-21-000124","document":"wf-form4_162879872892394.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000124/wf-form4_162879872892394.xml","form_type":"4"}},{"id":2605205,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Common Stock","published_at":"2021-08-12T16:05:50.000Z","date":"2021-08-02","kind":"exercise","acquired":true,"shares":13972,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on February 4, 2021, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 2, 2021 and February 2, 2025. The achievement of the first milestone occurred on July 30, 2021, as certified by the compensation committee August 2, 2021, resulting in 13,972 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third (1/3) on August 9, 2021 and an additional one-third (1/3) on each of the first and second anniversaries of July 30, 2021, subject to continued employment. These shares are reflected on Table I."}],"balance_after":121725,"source":{"system":"sec-edgar","filing":"0001580808-21-000124","document":"wf-form4_162879872892394.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000124/wf-form4_162879872892394.xml","form_type":"4"}},{"id":2722724,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Common Stock","published_at":"2021-05-07T16:21:10.000Z","date":"2021-05-06","kind":"sale","acquired":false,"shares":1877,"price":8.82,"value":16555.14,"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."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This is the weighted average price of the shares sold, which ranged from $8.81 to $8.82 per share. Upon request by the Commission staff, the Issuer, or a security holder of the Issuer, 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."}],"balance_after":107753,"source":{"system":"sec-edgar","filing":"0001580808-21-000091","document":"wf-form4_162041885302360.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000091/wf-form4_162041885302360.xml","form_type":"4"}},{"id":2771778,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Performance-based Restricted Stock Units","published_at":"2021-03-25T17:52:31.000Z","date":"2021-03-23","kind":"exercise","acquired":false,"shares":33333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on May 1, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between April 29, 2020 and April 29, 2024. The second achievement date occurred on March 12, 2021 as certified by the compensation committee of ATEN on March 23, 2021, resulting in 33,333 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third on each of the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on May 1, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between April 29, 2020 and April 29, 2024. The second achievement date occurred on March 12, 2021 as certified by the compensation committee of ATEN on March 23, 2021, resulting in 33,333 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third on each of the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I."}],"balance_after":33334,"derivative":{"expiration_date":"2024-04-29","underlying":"Common Stock","underlying_shares":33333},"source":{"system":"sec-edgar","filing":"0001580808-21-000058","document":"wf-form4_161670913805128.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000058/wf-form4_161670913805128.xml","form_type":"4"}},{"id":2771777,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Common Stock","published_at":"2021-03-25T17:52:31.000Z","date":"2021-03-23","kind":"exercise","acquired":true,"shares":33333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Performance-Based Restricted Stock Units were previously reported on May 1, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between April 29, 2020 and April 29, 2024. The second achievement date occurred on March 12, 2021 as certified by the compensation committee of ATEN on March 23, 2021, resulting in 33,333 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third on each of the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I."}],"balance_after":109630,"source":{"system":"sec-edgar","filing":"0001580808-21-000058","document":"wf-form4_161670913805128.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000058/wf-form4_161670913805128.xml","form_type":"4"}},{"id":2878979,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Performance-based Restricted Stock Units","published_at":"2021-02-04T19:12:23.000Z","date":"2021-02-02","kind":"exercise","acquired":false,"shares":33333,"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 May 1, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between April 29, 2020 and April 29, 2024. The first achievement date occurred on January 28, 2021, as certified by the compensation committee of ATEN on February 2, 2021, resulting in 33,333 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third on each of the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Performance-Based Restricted Stock Units were previously reported on May 1, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between April 29, 2020 and April 29, 2024. The first achievement date occurred on January 28, 2021, as certified by the compensation committee of ATEN on February 2, 2021, resulting in 33,333 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third on each of the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I."}],"balance_after":66667,"derivative":{"expiration_date":"2024-04-29","underlying":"Common Stock","underlying_shares":33333},"source":{"system":"sec-edgar","filing":"0001580808-21-000017","document":"wf-form4_161248392953627.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000017/wf-form4_161248392953627.xml","form_type":"4"}},{"id":2878978,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Performance-based Restricted Stock Units","published_at":"2021-02-04T19:12:23.000Z","date":"2021-02-02","kind":"grant","acquired":true,"shares":41916,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each share is represented by a Performance-based Restricted Stock Unit (\"PSU\")"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Grant of 41,916 Performance-Based Restricted Stock Units, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between February 2, 2021 and February 2, 2025 (each, a \"Performance Milestone\"). Upon achievement of a Performance Milestone, vesting is subject to continued employment with the Company through the applicable vesting date, which occurs in three equal installments with the first vesting to occur within thirty (30) days of achievement of the Performance Milestone and an additional one-third (1/3) on each of the first and second anniversaries of the date of achievement of the corresponding Performance Milestone."}],"balance_after":41916,"derivative":{"expiration_date":"2025-02-02","underlying":"Common Stock","underlying_shares":41916},"source":{"system":"sec-edgar","filing":"0001580808-21-000017","document":"wf-form4_161248392953627.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000017/wf-form4_161248392953627.xml","form_type":"4"}},{"id":2878977,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Common Stock","published_at":"2021-02-04T19:12:23.000Z","date":"2021-02-02","kind":"exercise","acquired":true,"shares":33333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Performance-Based Restricted Stock Units were previously reported on May 1, 2020, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day trading period between April 29, 2020 and April 29, 2024. The first achievement date occurred on January 28, 2021, as certified by the compensation committee of ATEN on February 2, 2021, resulting in 33,333 units meeting the appropriate performance-based conditions. However, these shares remain subject to time-based vesting conditions and will therefore vest as to one-third on each of the first, second and third anniversaries of achievement of the milestone, subject to continued employment. These shares are reflected on Table I."}],"balance_after":76297,"source":{"system":"sec-edgar","filing":"0001580808-21-000017","document":"wf-form4_161248392953627.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000017/wf-form4_161248392953627.xml","form_type":"4"}},{"id":2878976,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales & Mktg"}}],"security":"Common Stock","published_at":"2021-02-04T19:12:23.000Z","date":"2021-02-02","kind":"grant","acquired":true,"shares":17964,"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\"). One-third (1/3) of the total RSUs will vest on each of the first three (3) anniversaries of the date of grant, provided that the Reporting Person continues to serve through each vesting date."}],"balance_after":42964,"source":{"system":"sec-edgar","filing":"0001580808-21-000017","document":"wf-form4_161248392953627.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080821000017/wf-form4_161248392953627.xml","form_type":"4"}},{"id":3165242,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales"}}],"security":"Performance-based Restricted Stock Units","published_at":"2020-05-01T17:29:50.000Z","date":"2020-04-29","kind":"grant","acquired":true,"shares":100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each share is represented by a Performance-based Restricted Stock Unit (\"PSU\")"},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Grant of 100,000 Performance-Based Restricted Stock Units, each of which represents a contingent right to receive one share of common stock of ATEN, with vesting subject to the achievement of specified levels of the volume weighted average closing prices of a share of ATEN common stock during any one hundred (100) day period between April 29, 2020 and April 29, 2024. Vesting is subject to continued employment with the Company through the applicable vesting date, which occurs in three equal annual installments on beginning of the first anniversary of the corresponding performance milestone."}],"balance_after":100000,"derivative":{"expiration_date":"2024-04-29","underlying":"Common Stock","underlying_shares":100000},"source":{"system":"sec-edgar","filing":"0001580808-20-000021","document":"wf-form4_158836857280760.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080820000021/wf-form4_158836857280760.xml","form_type":"4"}},{"id":3165241,"issuer":{"id":4574,"kind":"organization","name":"A10 Networks, Inc.","symbol":"ATEN"},"owners":[{"id":108342,"kind":"person","name":"BRUENING MATTHEW P","position":1,"cik":"0001188611","reported_name":"BRUENING MATTHEW P","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, Worldwide Sales"}}],"security":"Common Stock","published_at":"2020-05-01T17:29:50.000Z","date":"2020-04-29","kind":"grant","acquired":true,"shares":25000,"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\"). One-fourth (1/4) of the total RSUs will vest on each of the first four (4) anniversaries of the Vesting Commencement Date (5/5/2020), provided that the Reporting Person continues to serve through each vesting date."}],"balance_after":25000,"source":{"system":"sec-edgar","filing":"0001580808-20-000021","document":"wf-form4_158836857280760.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1188611/000158080820000021/wf-form4_158836857280760.xml","form_type":"4"}}]}