{"transactions":[{"id":1934942,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-03-30T20:21:53.000Z","date":"2023-03-30","kind":"tax_withholding","planned":false,"acquired":false,"shares":3172,"price":6.65,"value":21093.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":424358,"source":{"system":"sec-edgar","filing":"0001127602-23-011648","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760223011648/form4.xml","form_type":"4"}},{"id":1944327,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Performance Share Unit","published_at":"2023-03-20T20:24:51.000Z","date":"2023-03-17","kind":"other","planned":false,"acquired":false,"shares":57252,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Transaction represents the expiration and forfeiture of performance units which were not earned because of the failure to meet the performance conditions."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Expired unearned.  See note 2"},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Expired unearned.  See note 2"}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":57252},"source":{"system":"sec-edgar","filing":"0001127602-23-010852","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760223010852/form4.xml","form_type":"4"}},{"id":1944326,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-03-20T20:24:51.000Z","date":"2023-03-17","kind":"tax_withholding","planned":false,"acquired":false,"shares":4929,"price":5.62,"value":27700.98,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":427530,"source":{"system":"sec-edgar","filing":"0001127602-23-010852","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760223010852/form4.xml","form_type":"4"}},{"id":1944325,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-03-20T20:24:51.000Z","date":"2023-03-17","kind":"tax_withholding","planned":false,"acquired":false,"shares":15021,"price":5.58,"value":83817.18,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":432459,"source":{"system":"sec-edgar","filing":"0001127602-23-010852","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760223010852/form4.xml","form_type":"4"}},{"id":2072493,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-01-03T22:43:55.000Z","date":"2023-01-03","kind":"tax_withholding","acquired":false,"shares":11579,"price":4.93,"value":57084.47,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":447480,"source":{"system":"sec-edgar","filing":"0001127602-23-000190","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760223000190/form4.xml","form_type":"4"}},{"id":2317627,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2022-03-25T21:03:37.000Z","date":"2022-03-25","kind":"tax_withholding","acquired":false,"shares":3431,"price":6.85,"value":23502.35,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":459059,"source":{"system":"sec-edgar","filing":"0001127602-22-010418","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760222010418/form4.xml","form_type":"4"}},{"id":2317626,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2022-03-25T21:03:37.000Z","date":"2022-03-25","kind":"tax_withholding","acquired":false,"shares":2453,"price":6.32,"value":15502.96,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":462490,"source":{"system":"sec-edgar","filing":"0001127602-22-010418","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760222010418/form4.xml","form_type":"4"}},{"id":2318754,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2022-03-24T21:00:15.000Z","date":"2022-03-23","kind":"tax_withholding","acquired":false,"shares":3811,"price":6.79,"value":25876.69,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":464943,"source":{"system":"sec-edgar","filing":"0001127602-22-010316","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760222010316/form4.xml","form_type":"4"}},{"id":2321301,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Performance Share Unit","published_at":"2022-03-22T22:45:21.000Z","date":"2022-03-22","kind":"grant","acquired":true,"shares":57252,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"These performance share units vest to the extent earned in 2023 based upon performance metrics for 2022.  The reporting person may earn between 0 and 200% of the units reported based on performance.  Once earned, these performance share units will be paid in restricted stock units which will vest over 4 years."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"These performance share units vest to the extent earned in 2023 based upon performance metrics for 2022.  The reporting person may earn between 0 and 200% of the units reported based on performance.  Once earned, these performance share units will be paid in restricted stock units which will vest over 4 years."}],"balance_after":57252,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":57252},"source":{"system":"sec-edgar","filing":"0001127602-22-010205","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760222010205/form4.xml","form_type":"4"}},{"id":2321300,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2022-03-22T22:45:21.000Z","date":"2022-03-22","kind":"grant","acquired":true,"shares":38168,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of restricted stock units that will vest 25% on each anniversary of the award."}],"balance_after":468754,"source":{"system":"sec-edgar","filing":"0001127602-22-010205","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760222010205/form4.xml","form_type":"4"}},{"id":2330637,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Performance Share Unit","published_at":"2022-03-16T21:18:03.000Z","date":"2022-03-14","kind":"exercise","acquired":false,"shares":28767,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Transaction represents the conversion of performance units earned based on 2021 performance.  The units earned are paid in restricted stock units which vest 25% on March 14 2023 and 25% on each of December 31, 2023, 2024 and 2025."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These performance share units vest to the extent earned in 2022 based upon performance metrics for 2021.  The reporting person may earn between 0 and 200% of the units reported based on performance.  Once earned, these performance share units will be paid in restricted stock units which will vest over 4 years."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"These performance share units vest to the extent earned in 2022 based upon performance metrics for 2021.  The reporting person may earn between 0 and 200% of the units reported based on performance.  Once earned, these performance share units will be paid in restricted stock units which will vest over 4 years."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":28767},"source":{"system":"sec-edgar","filing":"0001127602-22-009501","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760222009501/form4.xml","form_type":"4"}},{"id":2330636,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2022-03-16T21:18:03.000Z","date":"2022-03-14","kind":"exercise","acquired":true,"shares":28767,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Transaction represents the conversion of performance units earned based on 2021 performance.  The units earned are paid in restricted stock units which vest 25% on March 14 2023 and 25% on each of December 31, 2023, 2024 and 2025."}],"balance_after":430586,"source":{"system":"sec-edgar","filing":"0001127602-22-009501","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760222009501/form4.xml","form_type":"4"}},{"id":2330635,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2022-03-16T21:18:03.000Z","date":"2022-03-14","kind":"grant","acquired":true,"shares":75607,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of restricted stock units for payment of a performance award earned, which vests 25% on March 14, 2023 and 25% on each of December 31, 2023, 2024 and 2025."}],"balance_after":401819,"source":{"system":"sec-edgar","filing":"0001127602-22-009501","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760222009501/form4.xml","form_type":"4"}},{"id":2439934,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2022-01-07T21:51:12.000Z","date":"2022-01-06","kind":"tax_withholding","acquired":false,"shares":9754,"price":7.43,"value":72472.22,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":326212,"source":{"system":"sec-edgar","filing":"0001127602-22-001158","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760222001158/form4.xml","form_type":"4"}},{"id":2443667,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2022-01-06T00:25:45.000Z","date":"2022-01-03","kind":"tax_withholding","acquired":false,"shares":1247,"price":7.43,"value":9265.21,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":335966,"source":{"system":"sec-edgar","filing":"0001127602-22-001032","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760222001032/form4.xml","form_type":"4"}},{"id":2754194,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2021-04-07T15:01:17.000Z","date":"2021-03-29","kind":"tax_withholding","acquired":false,"shares":4471,"price":10.99,"value":49136.29,"ownership":{"direct":true},"balance_after":337213,"source":{"system":"sec-edgar","filing":"0001127602-21-013355","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760221013355/form4.xml","form_type":"4"}},{"id":2771854,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Performance Share Unit","published_at":"2021-03-25T23:34:12.000Z","date":"2021-03-24","kind":"grant","acquired":true,"shares":28767,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"These performance share units vest to the extent earned in 2022 based upon performance metrics for 2021.  The reporting person may earn between 0 and 200% of the units reported based on performance.  Once earned, these performance share units will be paid in restricted stock units which will vest over 4 years."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"These performance share units vest to the extent earned in 2022 based upon performance metrics for 2021.  The reporting person may earn between 0 and 200% of the units reported based on performance.  Once earned, these performance share units will be paid in restricted stock units which will vest over 4 years."}],"balance_after":28767,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":28767},"source":{"system":"sec-edgar","filing":"0001127602-21-012045","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760221012045/form4.xml","form_type":"4"}},{"id":2771853,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2021-03-25T23:34:12.000Z","date":"2021-03-24","kind":"grant","acquired":true,"shares":19178,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of restricted stock units that will vest 25% on each anniversary of the award."}],"balance_after":341684,"source":{"system":"sec-edgar","filing":"0001127602-21-012045","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760221012045/form4.xml","form_type":"4"}},{"id":2773046,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2021-03-25T01:52:18.000Z","date":"2021-03-16","kind":"grant","acquired":true,"shares":29800,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents an award of restricted stock units that will vest 25% on each anniversary of the award."}],"balance_after":322506,"source":{"system":"sec-edgar","filing":"0001127602-21-011985","document":"form4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760221011985/form4a.xml","form_type":"4/A","original_submission_date":"2021-03-18"}},{"id":2773045,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2021-03-25T01:52:18.000Z","date":"2021-03-16","kind":"grant","acquired":true,"shares":26833,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Transaction represents an award of restricted stock units for payment of a performance award earned, which vests 25% on March 16, 2022 and on December 31 in 2022, 2023 and 2024."}],"balance_after":292706,"source":{"system":"sec-edgar","filing":"0001127602-21-011985","document":"form4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760221011985/form4a.xml","form_type":"4/A","original_submission_date":"2021-03-18"}},{"id":2779032,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2021-03-18T20:34:09.000Z","date":"2021-03-16","kind":"grant","acquired":true,"shares":29800,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":322506,"source":{"system":"sec-edgar","filing":"0001127602-21-011407","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760221011407/form4.xml","form_type":"4"}},{"id":2779031,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2021-03-18T20:34:09.000Z","date":"2021-03-16","kind":"grant","acquired":true,"shares":26833,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Transaction represents an award of restricted stock units for payment of a performance award earned, which vests 25% on March 16, 2022 and on December 31 in 2022, 2023 and 2024."}],"balance_after":292706,"source":{"system":"sec-edgar","filing":"0001127602-21-011407","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760221011407/form4.xml","form_type":"4"}},{"id":2912142,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2021-01-08T22:13:39.000Z","date":"2021-01-07","kind":"tax_withholding","acquired":false,"shares":3297,"price":7.76,"value":25584.72,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":265873,"source":{"system":"sec-edgar","filing":"0001127602-21-001276","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760221001276/form4.xml","form_type":"4"}},{"id":4613103,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2021-01-05T22:34:38.000Z","date":"2021-01-04","kind":"tax_withholding","acquired":false,"shares":3180,"price":7.76,"value":24676.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":269170,"source":{"system":"sec-edgar","filing":"0001127602-21-000778","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760221000778/form4.xml","form_type":"4"}},{"id":3052218,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2020-08-19T22:08:37.000Z","date":"2020-08-17","kind":"tax_withholding","acquired":false,"shares":1147,"price":4.39,"value":5035.33,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":272350,"source":{"system":"sec-edgar","filing":"0001127602-20-023924","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760220023924/form4.xml","form_type":"4"}},{"id":3126873,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2020-06-02T20:30:50.000Z","date":"2020-06-01","kind":"tax_withholding","acquired":false,"shares":3195,"price":4.04,"value":12907.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":273497,"source":{"system":"sec-edgar","filing":"0001127602-20-018435","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760220018435/form4.xml","form_type":"4"}},{"id":3186438,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2020-04-03T00:07:47.000Z","date":"2020-04-01","kind":"tax_withholding","acquired":false,"shares":3297,"price":3.78,"value":12462.66,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":276692,"source":{"system":"sec-edgar","filing":"0001127602-20-012886","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760220012886/form4.xml","form_type":"4"}},{"id":3186385,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2020-04-02T20:36:29.000Z","date":"2020-04-01","kind":"grant","acquired":true,"shares":100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents an award of restricted stock units that will vest 100% on August 28, 2024."}],"balance_after":279989,"source":{"system":"sec-edgar","filing":"0001127602-20-012721","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760220012721/form4.xml","form_type":"4"}},{"id":3186384,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2020-04-02T20:36:29.000Z","date":"2020-03-31","kind":"purchase","acquired":true,"shares":1500,"price":4.48,"value":6720.0,"ownership":{"direct":true},"balance_after":179989,"source":{"system":"sec-edgar","filing":"0001127602-20-012721","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760220012721/form4.xml","form_type":"4"}},{"id":3190791,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2020-03-31T20:38:57.000Z","date":"2020-03-30","kind":"purchase","acquired":true,"shares":200,"price":4.05,"value":810.0,"ownership":{"direct":true},"balance_after":178489,"source":{"system":"sec-edgar","filing":"0001127602-20-012248","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760220012248/form4.xml","form_type":"4"}},{"id":3190790,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2020-03-31T20:38:57.000Z","date":"2020-03-30","kind":"purchase","acquired":true,"shares":5800,"price":4.5,"value":26100.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price on this line represents the weighted average price for the transactions reported on this line.  The range of prices for the transactions reported on this line was $4.20 to $5.11.  Upon request by the Commission staff or a security holder of the issuer, the full information regarding the number of shares purchased at each separate price shall be provided.  This information has been provided to the issuer."}],"balance_after":178289,"source":{"system":"sec-edgar","filing":"0001127602-20-012248","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760220012248/form4.xml","form_type":"4"}},{"id":3190789,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2020-03-31T20:38:57.000Z","date":"2020-03-27","kind":"grant","acquired":true,"shares":34949,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Transaction represents an award of restricted stock units for payment of a performance award earned, which vests 25% on March 27, 2021 and on December 31 in 2021, 2022 and 2023."}],"balance_after":172489,"source":{"system":"sec-edgar","filing":"0001127602-20-012248","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760220012248/form4.xml","form_type":"4"}},{"id":3322736,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2020-01-03T21:14:37.000Z","date":"2020-01-02","kind":"tax_withholding","acquired":false,"shares":3180,"price":14.27,"value":45378.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":137540,"source":{"system":"sec-edgar","filing":"0001127602-20-000655","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760220000655/form4.xml","form_type":"4"}},{"id":3434365,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2019-08-19T21:31:15.000Z","date":"2019-08-19","kind":"tax_withholding","acquired":false,"shares":1147,"price":15.59,"value":17881.73,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":140720,"source":{"system":"sec-edgar","filing":"0001127602-19-026992","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760219026992/form4.xml","form_type":"4"}},{"id":3504611,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2019-06-03T21:35:03.000Z","date":"2019-06-03","kind":"tax_withholding","acquired":false,"shares":3218,"price":13.82,"value":44472.76,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":141867,"source":{"system":"sec-edgar","filing":"0001127602-19-020529","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760219020529/form4.xml","form_type":"4"}},{"id":3584567,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2019-03-20T20:05:13.000Z","date":"2019-03-18","kind":"tax_withholding","acquired":false,"shares":2559,"price":14.04,"value":35928.36,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":145085,"source":{"system":"sec-edgar","filing":"0001127602-19-012434","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760219012434/form4.xml","form_type":"4"}},{"id":3590439,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2019-03-18T20:13:28.000Z","date":"2019-03-15","kind":"grant","acquired":true,"shares":28749,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Transaction represents an award of restricted stock units for payment of a performance award earned, which vests 25% on March 15, 2020 and December 31 in 2020, 2021 and 2022."}],"balance_after":147644,"source":{"system":"sec-edgar","filing":"0001127602-19-011793","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760219011793/form4.xml","form_type":"4"}},{"id":3708548,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2019-01-03T23:17:16.000Z","date":"2019-01-02","kind":"tax_withholding","acquired":false,"shares":621,"price":14.38,"value":8929.98,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":118895,"source":{"system":"sec-edgar","filing":"0001127602-19-000926","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760219000926/form4.xml","form_type":"4"}},{"id":3785847,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-10-22T20:32:11.000Z","date":"2018-10-22","kind":"tax_withholding","acquired":false,"shares":9400,"price":19.59,"value":184146.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the settlement of a restricted stock unit award."}],"balance_after":119516,"source":{"system":"sec-edgar","filing":"0001127602-18-030740","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760218030740/form4.xml","form_type":"4"}},{"id":3838185,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-08-20T21:48:03.000Z","date":"2018-08-17","kind":"tax_withholding","acquired":false,"shares":1147,"price":21.81,"value":25016.07,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the vesting of restricted stock units."}],"balance_after":128916,"source":{"system":"sec-edgar","filing":"0001127602-18-025814","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760218025814/form4.xml","form_type":"4"}},{"id":3905146,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-06-05T20:03:58.000Z","date":"2018-06-01","kind":"tax_withholding","acquired":false,"shares":3358,"price":19.25,"value":64641.5,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the partial vesting of restricted stock units."}],"balance_after":130063,"source":{"system":"sec-edgar","filing":"0001127602-18-019994","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760218019994/form4.xml","form_type":"4"}},{"id":3983870,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-03-23T20:47:11.000Z","date":"2018-03-22","kind":"grant","acquired":true,"shares":1887,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Transaction represents an award of restricted stock units which vest 25% on March 14, 2019 and December 31, 2019, 2020 and 2021."}],"balance_after":133421,"source":{"system":"sec-edgar","filing":"0001127602-18-012653","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760218012653/form4.xml","form_type":"4"}},{"id":3992284,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-03-16T21:36:31.000Z","date":"2018-03-14","kind":"grant","acquired":true,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Transaction represents an award of restricted stock units which vest 25% on March 14, 2019 and December 31, 2019, 2020 and 2021."}],"balance_after":131534,"source":{"system":"sec-edgar","filing":"0001127602-18-011881","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760218011881/form4.xml","form_type":"4"}},{"id":3992283,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-03-16T21:36:31.000Z","date":"2018-03-14","kind":"grant","acquired":true,"shares":2857,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Transaction represents an award of restricted stock units which vest 25% on March 14, 2019 and December 31, 2019, 2020 and 2021."}],"balance_after":126534,"source":{"system":"sec-edgar","filing":"0001127602-18-011881","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760218011881/form4.xml","form_type":"4"}},{"id":3992282,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-03-16T21:36:31.000Z","date":"2018-03-14","kind":"grant","acquired":true,"shares":12553,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Transaction represents an award of restricted stock units for payment of a performance award earned, which vests 25% on March 14, 2019 and December 31 in 2019, 2020 and 2021."}],"balance_after":123677,"source":{"system":"sec-edgar","filing":"0001127602-18-011881","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760218011881/form4.xml","form_type":"4"}},{"id":4096103,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-01-18T22:57:26.000Z","date":"2018-01-17","kind":"tax_withholding","acquired":false,"shares":1279,"price":22.58,"value":28879.82,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the partial vesting of restricted stock units."}],"balance_after":111124,"source":{"system":"sec-edgar","filing":"0001127602-18-002116","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760218002116/form4.xml","form_type":"4"}},{"id":4117061,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2018-01-02T21:48:54.000Z","date":"2018-01-02","kind":"tax_withholding","acquired":false,"shares":657,"price":23.47,"value":15419.79,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the partial vesting of restricted stock units."}],"balance_after":112403,"source":{"system":"sec-edgar","filing":"0001127602-18-000148","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760218000148/form4.xml","form_type":"4"}},{"id":4229474,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2017-08-18T20:13:40.000Z","date":"2017-08-18","kind":"tax_withholding","acquired":false,"shares":1212,"price":17.71,"value":21464.52,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the settlement of a restricted stock unit award."}],"balance_after":113060,"source":{"system":"sec-edgar","filing":"0001127602-17-026039","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217026039/form4.xml","form_type":"4"}},{"id":4232319,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2017-08-16T20:05:51.000Z","date":"2017-08-15","kind":"tax_withholding","acquired":false,"shares":339,"price":18.88,"value":6400.32,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the settlement of a restricted stock unit award."}],"balance_after":114272,"source":{"system":"sec-edgar","filing":"0001127602-17-025759","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217025759/form4.xml","form_type":"4"}},{"id":4295667,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2017-06-02T20:00:26.000Z","date":"2017-06-01","kind":"tax_withholding","acquired":false,"shares":3378,"price":20.92,"value":70667.76,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the settlement of a restricted stock unit award."}],"balance_after":114611,"source":{"system":"sec-edgar","filing":"0001127602-17-020291","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217020291/form4.xml","form_type":"4"}},{"id":4320784,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2017-05-15T20:36:52.000Z","date":"2017-05-11","kind":"sale","acquired":false,"shares":300,"price":22,"value":6600.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price on this line represents the weighted average price for the transactions reported on this line.  The range of prices for the transactions reported on this line was $21.97 to $22.04.  Upon request by the Commission staff or a security holder of the issuer, the full information regarding the number of shares sold at each separate price shall be provided.  This information has been provided to the issuer."}],"balance_after":117989,"source":{"system":"sec-edgar","filing":"0001127602-17-018065","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217018065/form4.xml","form_type":"4"}},{"id":4320783,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2017-05-15T20:36:52.000Z","date":"2017-05-11","kind":"sale","acquired":false,"shares":8600,"price":21.18,"value":182148.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price on this line represents the weighted average price for the transactions reported on this line.  The range of prices for the transactions reported on this line was $20.72 to $21.70.  Upon request by the Commission staff or a security holder of the issuer, the full information regarding the number of shares sold at each separate price shall be provided.  This information has been provided to the issuer."}],"balance_after":118289,"source":{"system":"sec-edgar","filing":"0001127602-17-018065","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217018065/form4.xml","form_type":"4"}},{"id":4320782,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2017-05-15T20:26:01.000Z","date":"2017-05-11","kind":"sale","acquired":false,"shares":300,"price":22,"value":6600.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price on this line represents the weighted average price for the transactions reported on this line.  The range of prices for the transactions reported on this line was $21.97 to $22.04.  Upon request by the Commission staff or a security holder of the issuer, the full information regarding the number of shares sold at each separate price shall be provided.  This information has been provided to the issuer."}],"balance_after":117989,"source":{"system":"sec-edgar","filing":"0001127602-17-018061","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217018061/form4.xml","form_type":"4"}},{"id":4320781,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2017-05-15T20:26:01.000Z","date":"2017-05-11","kind":"sale","acquired":false,"shares":8600,"price":21.18,"value":182148.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price on this line represents the weighted average price for the transactions reported on this line.  The range of prices for the transactions reported on this line was $20.72 to $21.70.  Upon request by the Commission staff or a security holder of the issuer, the full information regarding the number of shares sold at each separate price shall be provided.  This information has been provided to the issuer."}],"balance_after":118289,"source":{"system":"sec-edgar","filing":"0001127602-17-018061","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217018061/form4.xml","form_type":"4"}},{"id":4376397,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2017-03-21T21:50:57.000Z","date":"2017-03-20","kind":"grant","acquired":true,"shares":5412,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Transaction represents an award of restricted stock units for payment of a performance award earned, which vests 25% per year on December 31 in 2017, 2018, 2019 and 2020."}],"balance_after":126889,"source":{"system":"sec-edgar","filing":"0001127602-17-012554","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217012554/form4.xml","form_type":"4"}},{"id":4413862,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Stock Options (Right to Buy)","published_at":"2017-03-01T21:41:18.000Z","date":"2017-02-28","kind":"exercise","acquired":false,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":10,"exercise_date":"2010-04-09","expiration_date":"2019-04-09","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001127602-17-009287","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217009287/form4.xml","form_type":"4"}},{"id":4413861,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2017-03-01T21:41:18.000Z","date":"2017-02-28","kind":"sale","acquired":false,"shares":5000,"price":22.52,"value":112600.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price on this line represents the weighted average price for the transactions reported on this line.  The range of prices for the transactions reported on this line was $22.50 to $22.68.  Upon request by the Commission staff or a security holder of the issuer, the full information regarding the number of shares sold at each separate price shall be provided.  This information has been provided to the issuer."}],"balance_after":121477,"source":{"system":"sec-edgar","filing":"0001127602-17-009287","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217009287/form4.xml","form_type":"4"}},{"id":4413860,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2017-03-01T21:41:18.000Z","date":"2017-02-28","kind":"exercise","acquired":true,"shares":5000,"price":10,"value":50000.0,"ownership":{"direct":true},"balance_after":126477,"source":{"system":"sec-edgar","filing":"0001127602-17-009287","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217009287/form4.xml","form_type":"4"}},{"id":4488120,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2017-01-18T22:12:28.000Z","date":"2017-01-17","kind":"tax_withholding","acquired":false,"shares":979,"price":23.07,"value":22585.53,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the settlement of a restricted stock unit award."}],"balance_after":121477,"source":{"system":"sec-edgar","filing":"0001127602-17-001908","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760217001908/form4.xml","form_type":"4"}},{"id":4578969,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2016-10-17T21:04:13.000Z","date":"2016-10-17","kind":"tax_withholding","acquired":false,"shares":1862,"price":20.6,"value":38357.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld for payment of tax liability as a result of the settlement of a restricted stock unit award."}],"balance_after":122456,"source":{"system":"sec-edgar","filing":"0001127602-16-064849","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760216064849/form4.xml","form_type":"4"}},{"id":4605738,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Performance Share Unit","published_at":"2016-09-12T20:28:56.000Z","date":"2016-09-08","kind":"other","acquired":false,"shares":28260,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Transaction represents the expiration and surrender of performance share units unearned."},{"field":"shares","element":"transactionShares","label":"F4","text":"Transaction represents the expiration and surrender of performance share units unearned."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These performance share units vested to the extent earned on or about September 8, 2016."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"These performance share units vested to the extent earned on or about September 8, 2016."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":28260},"source":{"system":"sec-edgar","filing":"0001127602-16-062397","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760216062397/form4.xml","form_type":"4"}},{"id":4605737,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Performance Share Unit","published_at":"2016-09-12T20:28:56.000Z","date":"2016-09-08","kind":"other","acquired":false,"shares":10850,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Transaction represents the expiration and surrender of performance share units unearned."},{"field":"shares","element":"transactionShares","label":"F4","text":"Transaction represents the expiration and surrender of performance share units unearned."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"These performance share units vest to the extent earned on or about September 7, 2017."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"These performance share units vest to the extent earned on or about September 7, 2017."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":10850},"source":{"system":"sec-edgar","filing":"0001127602-16-062397","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760216062397/form4.xml","form_type":"4"}},{"id":4605736,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Performance Share Unit","published_at":"2016-09-12T20:28:56.000Z","date":"2016-09-08","kind":"exercise","acquired":false,"shares":8400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Transaction represents the settlement of performance share units granted January 21, 2014 that were earned and vested for the one and two year cycles."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These performance share units vested to the extent earned on or about September 8, 2016."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"These performance share units vested to the extent earned on or about September 8, 2016."}],"balance_after":28260,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":8400},"source":{"system":"sec-edgar","filing":"0001127602-16-062397","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760216062397/form4.xml","form_type":"4"}},{"id":4605735,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2016-09-12T20:28:56.000Z","date":"2016-09-08","kind":"tax_withholding","acquired":false,"shares":2844,"price":24.6,"value":69962.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Represents shares withheld for payment of tax liability as a result of the settlement of performance share units earned and vested."}],"balance_after":124318,"source":{"system":"sec-edgar","filing":"0001127602-16-062397","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760216062397/form4.xml","form_type":"4"}},{"id":4605734,"issuer":{"id":5354,"kind":"organization","name":"Mistras Group, Inc.","symbol":"MG"},"owners":[{"id":114968,"kind":"person","name":"Bertolotti Dennis","position":1,"cik":"0001501429","reported_name":"Bertolotti Dennis","relationship":{"officer":true,"officer_title":"President and COO"}}],"security":"Common Stock","published_at":"2016-09-12T20:28:56.000Z","date":"2016-09-08","kind":"exercise","acquired":true,"shares":8400,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Transaction represents the settlement of performance share units granted January 21, 2014 that were earned and vested for the one and two year cycles."}],"balance_after":127162,"source":{"system":"sec-edgar","filing":"0001127602-16-062397","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1436126/000112760216062397/form4.xml","form_type":"4"}}]}