{"transactions":[{"id":2768530,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2021-03-30T14:25:55.000Z","date":"2021-03-26","kind":"grant","acquired":true,"shares":11.156,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan upon the accrual of dividend rights associated with restricted stock units previously granted by the Issuer. Such units vest on the third anniversary of the date of grant of the underlying restricted stock units."}],"balance_after":10823.559,"source":{"system":"sec-edgar","filing":"0000944695-21-000075","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469521000075/edgar.xml","form_type":"4"}},{"id":2822507,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2021-03-02T22:55:25.000Z","date":"2021-03-01","kind":"tax_withholding","acquired":false,"shares":949,"price":119.67,"value":113566.83,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents shares that were forfeited to pay withholding taxes upon the vesting of the PBRSUs described in Footnote 1."}],"balance_after":10812.403,"source":{"system":"sec-edgar","filing":"0000944695-21-000047","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469521000047/edgar.xml","form_type":"4"}},{"id":2822506,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2021-03-02T22:55:25.000Z","date":"2021-02-26","kind":"grant","acquired":true,"shares":3134,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 27, 2018, the Reporting Person was granted 1,845 (target) performance-based restricted stock units (\"PBRSUs\") pursuant to the Issuer's 2014 Long-Term Incentive Plan. The PBRSUs were subject to both performance-based and time-based vesting conditions and provided for the accumulation of dividend equivalent rights. On February 26, 2021, the performance condition for this award was certified at 150% of the target award (as adjusted for accumulated dividend equivalent rights), and on February 27, 2021 the time-based vesting condition was satisfied, vesting the award for the number of shares indicated."}],"balance_after":11761.403,"source":{"system":"sec-edgar","filing":"0000944695-21-000047","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469521000047/edgar.xml","form_type":"4"}},{"id":2926361,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2021-01-04T16:48:39.000Z","date":"2020-12-30","kind":"grant","acquired":true,"shares":12.519,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan upon the accrual of dividend rights associated with restricted stock units previously granted by the Issuer. Such units vest on the third anniversary of the date of grant of the underlying restricted stock units."}],"balance_after":8627.403,"source":{"system":"sec-edgar","filing":"0000944695-21-000012","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469521000012/edgar.xml","form_type":"4"}},{"id":3021136,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2020-09-29T14:28:19.000Z","date":"2020-09-25","kind":"grant","acquired":true,"shares":14.796,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan upon the accrual of dividend rights associated with restricted stock units previously granted by the Issuer. Such units vest on the third anniversary of the date of grant of the underlying restricted stock units."}],"balance_after":8614.884,"source":{"system":"sec-edgar","filing":"0000944695-20-000165","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469520000165/edgar.xml","form_type":"4"}},{"id":3097901,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2020-06-30T00:07:31.000Z","date":"2020-06-26","kind":"grant","acquired":true,"shares":13.888,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan upon the accrual of dividend rights associated with restricted stock units previously granted by the Issuer. Such units vest on the third anniversary of the date of grant of the underlying restricted stock units."}],"balance_after":8600.088,"source":{"system":"sec-edgar","filing":"0000944695-20-000132","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469520000132/edgar.xml","form_type":"4"}},{"id":3192411,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2020-03-30T20:30:56.000Z","date":"2020-03-27","kind":"grant","acquired":true,"shares":14.504,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan upon the accrual of dividend rights associated with restricted stock units previously granted by the Issuer. Such units vest on the third anniversary of the date of grant of the underlying restricted stock units."}],"balance_after":8586.2,"source":{"system":"sec-edgar","filing":"0000944695-20-000077","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469520000077/edgar.xml","form_type":"4"}},{"id":3234586,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock Option (right to buy)","published_at":"2020-03-03T21:07:54.000Z","date":"2020-02-28","kind":"grant","acquired":true,"shares":8223,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date."}],"balance_after":8223,"derivative":{"exercise_price":118.54,"expiration_date":"2030-02-28","underlying":"Common Stock","underlying_shares":8223},"source":{"system":"sec-edgar","filing":"0000944695-20-000054","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469520000054/edgar.xml","form_type":"4"}},{"id":3234585,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2020-03-03T21:07:54.000Z","date":"2020-02-28","kind":"grant","acquired":true,"shares":1001,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan. Such units vest on the third anniversary of the date of grant."}],"balance_after":8571.696,"source":{"system":"sec-edgar","filing":"0000944695-20-000054","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469520000054/edgar.xml","form_type":"4"}},{"id":3247107,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2020-02-26T15:48:19.000Z","date":"2020-02-24","kind":"tax_withholding","acquired":false,"shares":1116,"price":134.22,"value":149789.52,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents shares that were forfeited to pay withholding taxes upon the vesting of the PBRSUs described in Footnote 1."}],"balance_after":7570.696,"source":{"system":"sec-edgar","filing":"0000944695-20-000033","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469520000033/edgar.xml","form_type":"4"}},{"id":3247106,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2020-02-26T15:48:19.000Z","date":"2020-02-24","kind":"grant","acquired":true,"shares":3721,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 24, 2017, the Reporting Person was granted 2,481 (target) performance-based restricted stock units (\"PBRSUs\") pursuant to the Issuer's 2014 Long-Term Incentive Plan. The PBRSUs were subject to both performance-based and time-based vesting conditions. On February 24, 2020, the performance condition for this award was certified at 150% of the target award and the time-based vesting condition was satisfied, vesting the award for the number of shares indicated."}],"balance_after":8686.696,"source":{"system":"sec-edgar","filing":"0000944695-20-000033","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469520000033/edgar.xml","form_type":"4"}},{"id":3329268,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2019-12-31T18:55:33.000Z","date":"2019-12-27","kind":"grant","acquired":true,"shares":23.307,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan upon the accrual of dividend rights associated with restricted stock units originally granted on March 5, 2019 as a result of the payment of a $2.50 special dividend on December 27, 2019 to all shareholders of record on December 16, 2019 (the \"Special Dividend\") and the payment of the company's regular quarterly dividend on the same date. Such units vest on the third anniversary of the date of grant of the underlying restricted stock units."}],"balance_after":4965.696,"source":{"system":"sec-edgar","filing":"0000944695-19-000209","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469519000209/edgar.xml","form_type":"4"}},{"id":3403631,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2019-10-01T14:11:16.000Z","date":"2019-09-27","kind":"grant","acquired":true,"shares":4.482,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan upon the accrual of dividend rights associated with restricted stock units previously granted by the Issuer. Such units vest on the third anniversary of the date of grant of the underlying restricted stock units."}],"balance_after":4942.389,"source":{"system":"sec-edgar","filing":"0000944695-19-000173","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469519000173/edgar.xml","form_type":"4"}},{"id":3475154,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2019-07-01T20:07:50.000Z","date":"2019-06-28","kind":"grant","acquired":true,"shares":4.678,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan upon the accrual of dividend rights associated with restricted stock units previously granted by the Issuer. Such units vest on the third anniversary of the date of grant of the underlying restricted stock units."}],"balance_after":4937.907,"source":{"system":"sec-edgar","filing":"0000944695-19-000139","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469519000139/edgar.xml","form_type":"4"}},{"id":3570119,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2019-04-02T14:10:15.000Z","date":"2019-03-29","kind":"grant","acquired":true,"shares":5.229,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan upon the accrual of dividend rights associated with restricted stock units previously granted by the Issuer. Such units vest on the third anniversary of the date of grant of the underlying restricted stock units."}],"balance_after":4933.229,"source":{"system":"sec-edgar","filing":"0000944695-19-000081","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469519000081/edgar.xml","form_type":"4"}},{"id":3606871,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock Option (right to buy)","published_at":"2019-03-07T20:13:53.000Z","date":"2019-03-05","kind":"grant","acquired":true,"shares":6558,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date."}],"balance_after":6558,"derivative":{"exercise_price":119.36,"expiration_date":"2029-03-05","underlying":"Common Stock","underlying_shares":6558},"source":{"system":"sec-edgar","filing":"0000944695-19-000067","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469519000067/edgar.xml","form_type":"4"}},{"id":3606870,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2019-03-07T20:13:53.000Z","date":"2019-03-05","kind":"grant","acquired":true,"shares":995,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Grant of restricted stock units under the Issuer's 2014 Long-Term Incentive Plan. Such units vest on the third anniversary of the date of grant."}],"balance_after":4928,"source":{"system":"sec-edgar","filing":"0000944695-19-000067","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469519000067/edgar.xml","form_type":"4"}},{"id":3629996,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2019-02-27T20:27:00.000Z","date":"2019-02-25","kind":"tax_withholding","acquired":false,"shares":882,"price":118.02,"value":104093.64,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer."}],"balance_after":3933,"source":{"system":"sec-edgar","filing":"0000944695-19-000043","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469519000043/edgar.xml","form_type":"4"}},{"id":3688431,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2019-01-24T23:18:45.000Z","date":"2019-01-23","kind":"grant","acquired":true,"shares":1594,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 23, 2016, the Reporting Person was granted 1,325 (target) performance-based restricted stock units (\"PBRSUs\") pursuant to the Issuer's 2014 Long-Term Incentive Plan. The PBRSUs were subject to both performance-based and time-based vesting conditions. On December 30, 2018, the Issuer announced the issuance of a $4.75 special dividend payable on January 25, 2019 to all shareholders of record on January 10, 2019 (the \"Special Dividend\"). On January 9, 2019, pursuant to the terms of the award, the target amount of the PBRSUs was automatically adjusted to reflect the Special Dividend. On January 23, 2019, the performance condition for this award was certified at 115.38% of the target award, vesting the performance condition of the PBRSUs and converting the award into a restricted stock unit for the number of shares indicated. The restricted stock unit will vest 100% on the third anniversary of the original PBRSU grant date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 57 shares acquired by an automatic adjustment to a previously granted time-based restricted stock unit award on January 9, 2019 pursuant to the terms specified in the award to reflect the Special Dividend."}],"balance_after":4815,"source":{"system":"sec-edgar","filing":"0000944695-19-000020","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469519000020/edgar.xml","form_type":"4"}},{"id":3937672,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2018-05-11T13:24:36.000Z","date":"2018-05-09","kind":"sale","acquired":false,"shares":1924,"price":117.3481,"value":225777.7444,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple prices ranging from $116.95 to $117.89, inclusive. The Reporting Person undertakes to provide The Hanover Insurance Group, Inc. (\"THG\"), any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above."}],"balance_after":3164,"source":{"system":"sec-edgar","filing":"0000944695-18-000055","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469518000055/edgar.xml","form_type":"4"}},{"id":4025106,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock Option (right to buy)","published_at":"2018-03-01T20:47:05.000Z","date":"2018-02-27","kind":"grant","acquired":true,"shares":13890,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date."}],"balance_after":13890,"derivative":{"exercise_price":110.57,"expiration_date":"2028-02-27","underlying":"Common Stock","underlying_shares":13890},"source":{"system":"sec-edgar","filing":"0000944695-18-000024","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469518000024/edgar.xml","form_type":"4"}},{"id":4025105,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2018-03-01T20:47:05.000Z","date":"2018-02-27","kind":"tax_withholding","acquired":false,"shares":1003,"price":110.57,"value":110901.71,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer."}],"balance_after":5088,"source":{"system":"sec-edgar","filing":"0000944695-18-000024","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469518000024/edgar.xml","form_type":"4"}},{"id":4025104,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2018-03-01T20:47:05.000Z","date":"2018-02-27","kind":"grant","acquired":true,"shares":1864,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 27, 2015, the Reporting Person was granted 1,450 (target) performance-based restricted stock units (\"PBRSUs\") pursuant to the Issuer's 2014 Long-Term Incentive Plan. The PBRSUs were subject to both performance-based and time-based vesting conditions. On February 27, 2018, the time-based condition was met and the performance condition was certified at 128.57% of the target award, vesting the PBRSUs and converting the PBRSU into the number of shares indicated on this Form 4."}],"balance_after":6091,"source":{"system":"sec-edgar","filing":"0000944695-18-000024","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469518000024/edgar.xml","form_type":"4"}},{"id":4411172,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2017-03-02T12:36:55.000Z","date":"2017-02-28","kind":"tax_withholding","acquired":false,"shares":698,"price":90.02,"value":62833.96,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares that were forfeited to pay withholding taxes upon the vesting of restricted stock units that were previously granted by the Issuer."}],"balance_after":4227,"source":{"system":"sec-edgar","filing":"0000944695-17-000040","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469517000040/edgar.xml","form_type":"4"}},{"id":4418913,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock Option (right to buy)","published_at":"2017-02-28T21:54:07.000Z","date":"2017-02-27","kind":"exercise","acquired":false,"shares":4420,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The option, representing the right to purchase a total of 13,260 shares, vested 1/3 on 2/23/17, and 1/3 will vest on each of 2/23/18 and 2/23/19."}],"balance_after":8840,"derivative":{"exercise_price":82.74,"expiration_date":"2026-02-23","underlying":"Common Stock","underlying_shares":4420},"source":{"system":"sec-edgar","filing":"0000944695-17-000028","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469517000028/edgar.xml","form_type":"4"}},{"id":4418912,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock Option (right to buy)","published_at":"2017-02-28T21:54:07.000Z","date":"2017-02-27","kind":"exercise","acquired":false,"shares":9333,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The option, representing the right to purchase a total of 14,000 shares, vested 1/3 on each of 2/27/16 and 2/27/17, and the remaining 1/3 will vest on 2/27/18."}],"balance_after":4667,"derivative":{"exercise_price":70.24,"expiration_date":"2025-02-27","underlying":"Common Stock","underlying_shares":9333},"source":{"system":"sec-edgar","filing":"0000944695-17-000028","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469517000028/edgar.xml","form_type":"4"}},{"id":4418911,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock Option (right to buy)","published_at":"2017-02-28T21:54:07.000Z","date":"2017-02-24","kind":"grant","acquired":true,"shares":16185,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Such options vest as to one-third of the shares on each of the first three anniversaries of the grant date."}],"balance_after":16185,"derivative":{"exercise_price":91.19,"expiration_date":"2027-02-24","underlying":"Common Stock","underlying_shares":16185},"source":{"system":"sec-edgar","filing":"0000944695-17-000028","document":"edgar.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469517000028/edgar.xml","form_type":"4"}},{"id":4418910,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2017-02-28T21:54:07.000Z","date":"2017-02-27","kind":"sale","acquired":false,"shares":4420,"price":90.2765,"value":399022.13,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple prices ranging from $90.25 to $90.37, inclusive. The Reporting Person undertakes to provide THG, any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above."}],"balance_after":4925,"source":{"system":"sec-edgar","filing":"0000944695-17-000028","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469517000028/edgar.xml","form_type":"4"}},{"id":4418909,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2017-02-28T21:54:07.000Z","date":"2017-02-27","kind":"exercise","acquired":true,"shares":4420,"price":82.74,"value":365710.8,"ownership":{"direct":true},"balance_after":9345,"source":{"system":"sec-edgar","filing":"0000944695-17-000028","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469517000028/edgar.xml","form_type":"4"}},{"id":4418908,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2017-02-28T21:54:07.000Z","date":"2017-02-27","kind":"sale","acquired":false,"shares":9333,"price":90.3757,"value":843476.4081,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple prices ranging from $90.369 to $90.42, inclusive. The Reporting Person undertakes to provide The Hanover Insurance Group, Inc. (\"THG\"), any security holder of THG, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above."}],"balance_after":4925,"source":{"system":"sec-edgar","filing":"0000944695-17-000028","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469517000028/edgar.xml","form_type":"4"}},{"id":4418907,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2017-02-28T21:54:07.000Z","date":"2017-02-27","kind":"exercise","acquired":true,"shares":9333,"price":70.24,"value":655549.92,"ownership":{"direct":true},"balance_after":14258,"source":{"system":"sec-edgar","filing":"0000944695-17-000028","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469517000028/edgar.xml","form_type":"4"}},{"id":4418906,"issuer":{"id":3652,"kind":"organization","name":"HANOVER INSURANCE GROUP, INC.","symbol":"THG"},"owners":[{"id":140813,"kind":"person","name":"Berthiaume Mark Leo","position":1,"cik":"0001625927","reported_name":"Berthiaume Mark Leo","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2017-02-28T21:54:07.000Z","date":"2017-02-27","kind":"sale","acquired":false,"shares":1418,"price":90.294,"value":128036.892,"ownership":{"direct":true},"balance_after":4925,"source":{"system":"sec-edgar","filing":"0000944695-17-000028","document":"edgar.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/944695/000094469517000028/edgar.xml","form_type":"4"}}]}