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Twenty-five percent (25%) of the units vested on May 1, 2019 and the remainder of the units vest on an annual basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on such vesting date."}],"balance_after":23162,"source":{"system":"sec-edgar","filing":"0001209191-19-027030","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1737289/000120919119027030/doc4.xml","form_type":"4"}},{"id":3542472,"issuer":{"id":126738,"kind":"organization","name":"Mimecast Ltd","symbol":"MIME"},"owners":[{"id":23735,"kind":"person","name":"Van Houten Christina","position":1,"cik":"0001737289","reported_name":"Van Houten Christina","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Ordinary Shares","published_at":"2019-05-02T20:49:16.000Z","date":"2019-05-01","kind":"exercise","acquired":true,"shares":4412,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The number of Ordinary Shares reflects the settlement of restricted share units upon vesting, net of Ordinary Shares that were retained (but not issued) by the Issuer in satisfaction of tax withholding obligations associated with the vesting of such units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Each restricted share unit represents a contingent right to receive one share of the Issuer's ordinary shares."}],"balance_after":5017,"source":{"system":"sec-edgar","filing":"0001209191-19-027030","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1737289/000120919119027030/doc4.xml","form_type":"4"}},{"id":3565250,"issuer":{"id":126738,"kind":"organization","name":"Mimecast Ltd","symbol":"MIME"},"owners":[{"id":23735,"kind":"person","name":"Van Houten Christina","position":1,"cik":"0001737289","reported_name":"Van Houten Christina","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Share Option (Right to Buy)","published_at":"2019-04-03T23:32:27.000Z","date":"2019-04-01","kind":"grant","acquired":true,"shares":28000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This option was granted on April 1, 2019. Twenty-five percent (25%) of the shares vest on April 1, 2020, and the remainder of the shares vest on a quarterly basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on such vesting date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"This option was granted on April 1, 2019. Twenty-five percent (25%) of the shares vest on April 1, 2020, and the remainder of the shares vest on a quarterly basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on such vesting date."}],"balance_after":28000,"derivative":{"exercise_price":47.23,"expiration_date":"2029-04-01","underlying":"Ordinary Shares","underlying_shares":28000},"source":{"system":"sec-edgar","filing":"0001209191-19-023508","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1737289/000120919119023508/doc4.xml","form_type":"4"}},{"id":3565249,"issuer":{"id":126738,"kind":"organization","name":"Mimecast Ltd","symbol":"MIME"},"owners":[{"id":23735,"kind":"person","name":"Van Houten Christina","position":1,"cik":"0001737289","reported_name":"Van Houten Christina","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Restricted Share Units","published_at":"2019-04-03T23:32:27.000Z","date":"2019-04-01","kind":"grant","acquired":true,"shares":14000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Each restricted share unit represents a contingent right to receive one share of the Issuer's ordinary shares."},{"field":"shares","element":"transactionShares","label":"F2","text":"These restricted share units were granted on April 1, 2019.  Twenty-five percent (25%) of the units vest on April 1, 2020 and the remainder of the units vest on an annual basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on such vesting date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"These restricted share units were granted on April 1, 2019.  Twenty-five percent (25%) of the units vest on April 1, 2020 and the remainder of the units vest on an annual basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on such vesting date."}],"balance_after":14000,"source":{"system":"sec-edgar","filing":"0001209191-19-023508","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1737289/000120919119023508/doc4.xml","form_type":"4"}},{"id":3947751,"issuer":{"id":126738,"kind":"organization","name":"Mimecast Ltd","symbol":"MIME"},"owners":[{"id":23735,"kind":"person","name":"Van Houten Christina","position":1,"cik":"0001737289","reported_name":"Van Houten Christina","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Share Option (Right to Buy)","published_at":"2018-05-03T23:42:55.000Z","date":"2018-05-01","kind":"grant","acquired":true,"shares":125000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This option was granted on May 1, 2018.  Twenty-five (25%) of the shares vest on May 1, 2019 and the remainder vest on a quarterly basis over the next three (3) years, provided the Reporting Person remains an employee of the Issuer on such vesting dates."}],"balance_after":125000,"derivative":{"exercise_price":38.05,"expiration_date":"2028-05-01","underlying":"Ordinary Shares","underlying_shares":125000},"source":{"system":"sec-edgar","filing":"0001209191-18-027899","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1737289/000120919118027899/doc4.xml","form_type":"4"}},{"id":3947750,"issuer":{"id":126738,"kind":"organization","name":"Mimecast Ltd","symbol":"MIME"},"owners":[{"id":23735,"kind":"person","name":"Van Houten Christina","position":1,"cik":"0001737289","reported_name":"Van Houten Christina","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Restricted Share Units","published_at":"2018-05-03T23:42:55.000Z","date":"2018-05-01","kind":"grant","acquired":true,"shares":25000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"Each restricted share unit represents a contingent right to receive one share of the Issuer's ordinary shares."},{"field":"shares","element":"transactionShares","label":"F2","text":"These restricted share units were granted on May 1, 2018.  Twenty-five percent (25%) of the units vest on May 1, 2019 and the remainder of the units vest on an annual basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on such vesting dates."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"These restricted share units were granted on May 1, 2018.  Twenty-five percent (25%) of the units vest on May 1, 2019 and the remainder of the units vest on an annual basis over the next three (3) years, provided that the Reporting Person remains an employee of the Issuer on such vesting dates."}],"balance_after":25000,"source":{"system":"sec-edgar","filing":"0001209191-18-027899","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1737289/000120919118027899/doc4.xml","form_type":"4"}}]}